WO1996026974A1 - Method of degrading polymer - Google Patents
Method of degrading polymer Download PDFInfo
- Publication number
- WO1996026974A1 WO1996026974A1 PCT/JP1996/000448 JP9600448W WO9626974A1 WO 1996026974 A1 WO1996026974 A1 WO 1996026974A1 JP 9600448 W JP9600448 W JP 9600448W WO 9626974 A1 WO9626974 A1 WO 9626974A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- carrier
- polymer
- microorganism
- solid phase
- water retention
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P1/00—Preparation of compounds or compositions, not provided for in groups C12P3/00 - C12P39/00, by using microorganisms or enzymes
- C12P1/04—Preparation of compounds or compositions, not provided for in groups C12P3/00 - C12P39/00, by using microorganisms or enzymes by using bacteria
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N11/00—Carrier-bound or immobilised enzymes; Carrier-bound or immobilised microbial cells; Preparation thereof
- C12N11/02—Enzymes or microbial cells immobilised on or in an organic carrier
- C12N11/04—Enzymes or microbial cells immobilised on or in an organic carrier entrapped within the carrier, e.g. gel or hollow fibres
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N11/00—Carrier-bound or immobilised enzymes; Carrier-bound or immobilised microbial cells; Preparation thereof
- C12N11/14—Enzymes or microbial cells immobilised on or in an inorganic carrier
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P1/00—Preparation of compounds or compositions, not provided for in groups C12P3/00 - C12P39/00, by using microorganisms or enzymes
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
- C12R2001/00—Microorganisms ; Processes using microorganisms
Definitions
- the present invention relates to a method for decomposing a polymer, particularly a biodegradable polymer by a microorganism, and an apparatus used for the method.
- Biodegradable polymers that are degraded by microorganisms in the natural environment, and research on biodegradable polymers using enzymes or microorganisms have been conducted. Studies to decompose by action have been actively conducted and are being put to practical use. Biodegradable polymers that are currently being studied can be broadly classified into “synthetic polymers”, “microorganism-producing polymers”, and “natural polymers derived from plants or animals”.
- Synthetic polymers can be used to design polymers with various functions from abundant structural units, and are expected to be an alternative to general-purpose plastics.
- lactic acid, glycolic acid, or a polymer composed of lactic acid and glycolic acid is known. Less mold than natural polymers derived from plants or animals, and has better transparency than microorganism-producing polymers or other synthetic polymers It has special features.
- lactic acid, glycolic acid, or a polymer composed of lactic acid and glycolic acid is hydrolyzed to lactic acid or glycolic acid, so that it is biosafe. It is suitable for use in medical materials or foods.
- biodegradable polymers have high material strength during use, but are rapidly degraded in the environment after disposal. It is known that lactic acid, glycolic acid, or a polymer composed of lactic acid and glycolic acid is hydrolyzed non-enzymatically in vivo. Yamane et al .: Artificial organs____________________________ (175) (19986)]. On the other hand, the material strength increases as the molecular weight increases, and these properties are contradictory.
- poly-L-lactic acid decomposes in physiological saline within about 2 weeks at a molecular weight of 100, but its material strength is low and is not practical.
- molecular weight is 10,000 or more, it becomes difficult to decompose, but the material strength is increased to such an extent that it can be used as a plastic.
- the composition is composed of various components, and the place where the composition is produced. * The morphology and flora of the composition vary greatly depending on the season.
- the conventional method using a component cannot always degrade a biodegradable polymer with good reproducibility, and in some cases, the biodegradable polymer is almost completely degraded. In some cases, the molecules did not decompose.
- An object of the present invention is to provide a carrier with microorganisms and microorganisms in order to rapidly and reproducibly degrade a polymer having high strength when used against the background of the above-mentioned conventional technology.
- An object of the present invention is to provide a method for decomposing a polymer using a solid phase in which nutrient components and water necessary for growth are retained, and an apparatus used for the method. Disclosure of the invention
- the present inventors have conducted intensive studies. As a result, regarding the degradation of polymers by microorganisms, microorganisms, nutrients, and nutrients that have a certain maximum water retention rate among carriers capable of retaining microorganisms, nutrients, and moisture It was found that when a solid phase in which water was retained and the porosity was adjusted to a certain range was used, decomposition of the polymer by microorganisms occurred quickly, and the present invention was completed based on the findings. Things.
- the present invention provides a polymer obtained by contacting a polymer with a solid phase comprising a carrier, a microorganism, and an aqueous solution containing nutrient components and water necessary for the growth of the microorganism.
- a decomposition method wherein the maximum water retention of the carrier is 40% by weight or more and 4.0% or less by weight, and the aqueous solution is used in a carrier of 10% or more and 100% or less of the maximum water retention of the carrier.
- An object of the present invention is to provide a method for decomposing a polymer, which is retained and has a porosity of the solid phase of not less than 25% and less than 100%, and an apparatus used for the method.
- FIG. 1 and 2 show an apparatus for disassembling a polymer used in the practice of the present invention.
- FIG. 1 shows a cross section of a side surface
- FIG. 2 shows a cross section of a front surface.
- BEST MODE FOR CARRYING OUT THE INVENTION The microorganisms and nutrients used in the present invention are maintained.
- the body is a material that does not inhibit the growth of microorganisms, and can retain microbes, nutrient components and water necessary for the growth of the microorganisms, and the solid phase used in the method of the present invention. When used in air, it is necessary to generate enough air to supply oxygen necessary for the growth of microorganisms from the air.
- the maximum water retention of a carrier that satisfies such requirements is 40% by weight (g (water) Zg (dry carrier)) or more and 4.0000 overlap% (g (water) Zg (dry) Carrier)), preferably not more than 50% by weight (g (water) Zg (dry carrier)) and not more than 3,000% by weight (g (water) Zg (dry carrier)). .
- the carrier used in the present invention is made of an organic polymer or an inorganic material.
- Examples of the organic polymer include animal bodies other than human, such as leather and wool, and processed products thereof, sawdust, limp, rice husk, corn, bran, paper, cotton, and other plants and processed products thereof.
- Examples include foamed organic polymers such as foamed cellulose, foamed urethane, foamed polyvinyl alcohol, and fiber organic polymers such as nonwoven fabric. Further, there can be exemplified one in which the foamed organic polymer is itself a biodegradable polymer.
- Inorganic substances include molecular sieves, vermiculite, phenolite, stainless steel fiber, phenolic mineral wool, and glass wool. For example, or an 82-inch aluminum cone. Other than the above, it can be used as a carrier of the present invention as long as the maximum water retention is satisfied.
- the carriers used in the present invention are the single substances exemplified above and mixtures thereof. However, when the carrier is a mixture of a plurality of carriers, the maximum water retention when the entire carrier in the solid phase is regarded as one carrier is 40% by weight or more and 4.0000% by weight or less. It is necessary.
- the carrier does not have a specific size per se, such as a foamed organic polymer, a carrier having an appropriate size may be prepared and some of them may be used.
- the space existing in the carrier is called a pore, and the space between the carriers is called a void.
- the microorganism used in the present invention is not particularly limited as long as it decomposes the polymer, but prokaryotic microorganisms such as eukaryotic microorganisms such as molds and yeasts, bacteria, and actinomycetes can be used. . Also, microorganisms extracted from soil, microorganisms in activated sludge, and flora in compost can be used. Examples of the bacteria include bacteria belonging to the genus Escherichia, bacteria belonging to the genus Pseudomonas, and bacteria belonging to the genus Bacillus. As long as the polymer is decomposed, it is the scope of the present invention.
- microorganisms examples include Bacillus su_bti lis MT-10658, which is one kind of Bacillus subtilis isolated from the soil by the present inventors. You. This fungus The stock is under the accession number FERMBP-5354 ( ⁇ trust date: December 19, 1995) and is the Ministry of International Trade and Industry of the Ministry of International Trade and Industry of 1-3-1 Higashi, Tsukuba, Ibaraki Prefecture. It has been deposited with the Institute of Biotechnology and Industrial Technology based on the Budapest Treaty on Microorganisms.
- the microorganism can be used alone, but it is not always necessary, and it is preferable to use a mixture of two or more kinds of microbial flora.
- the nutrients used in the present invention refer to substances necessary for the growth of microorganisms that degrade polymers, and include carbon sources, nitrogen sources, inorganic salts and trace elements.
- Examples of the medium include bouillon medium (meat extract 3 g / L, peptone 10 g ZL, and salted ichttrium 5 g / L). .
- the carrier as described above may be impregnated with an aqueous solution containing a nutrient component and a microorganism such as a culture solution.
- the amount of the aqueous solution to be impregnated is There is no particular limitation as long as it is necessary for the growth of microorganisms in the carrier and has enough space to supply oxygen in the air.
- the liquid volume is preferably 10% or more and 100% or less of the maximum water retention of the carrier, and more preferably 20% or more and 95% or less of the maximum water retention of the carrier. More preferably, it is 25% or more and 90% or less of the maximum water retention of the carrier.
- the solid phase used for decomposing the polymer in the present invention means a carrier, a microorganism, an aqueous solution containing nutrient components and water necessary for growth of the microorganism, and other components as a whole. And when the solid phase consists of several carriers impregnated with an aqueous solution containing, for example, microorganisms, nutrients and water, the carrier, the microorganisms, the aqueous solution and the pores, as well as the voids, are also present. In the present invention, it is recognized as a solid phase.
- the void means the entire space excluding a substantial part of the carrier and other components from the solid phase.
- the void means the whole space in which solid organisms in the solid phase, nutrients, water, and air necessary for the growth of the microorganisms can exist. Therefore, not only the gap between the carrier and the carrier, but also a portion into which the substance inside the carrier can enter is recognized as the void.
- the porosity in the present invention means the ratio of the porosity to the volume of the solid phase.
- the porosity is as follows: It is calculated by the calculation formula 1 of.
- the porosity of the solid phase is at least 25% and less than 100%, preferably at least 40% and less than 100%, more preferably at least 60%. It is less than 100%.
- microorganisms are grown on a carrier impregnated with a carrier containing a nutrient component and an aqueous solution containing a microorganism, and decomposed into a container containing the carrier. It is only necessary to contact or mix the mers. Temperature when you decomposition Po Li-mer temperature der usually that Ki out growth of microorganisms is, more specifically, at 0 to 8 0 rather than the good or the Ru Oh at 2 0 ⁇ 6 O e C. Also, if the contents of the container are stirred occasionally, the decomposition of the polymer may be accelerated, and it is preferable that gas flows into the contents of the container.
- the polymer When the polymer is brought into contact with the polymer, it is preferable to crush the polymer to an appropriate size because the time required for decomposition can be shortened.
- the mechanism by which the polymer is degraded by the method of the present invention is not necessarily clear, but when enzymatic degradation of the microorganism itself is used, the mechanism of the degradation of the polymer produced by the growth of the microorganism is considered. It is expected that the ester bond of the polymer will be chemically hydrolyzed by the presence of monium ion or the like, or that they will occur in competition. So, the above From a viewpoint, it is preferable to use a nutrient component of the present invention, such as a bouillon medium, which contains many nitrogen sources.
- the polymer degraded by the method of the present invention is not particularly limited as long as it does not inhibit the growth of microorganisms.
- lactic acid, glycolic acid, 6-hydroxy A homopolymer or cobolimer of a hydroxycarboxylic acid such as xixabronic acid, 3—hydroxybutyric acid, 3—hydroxyvaleric acid, or Aliphatic dicarboxylic acids such as carboxylic acid, adipic acid, cyclohexane dicarboxylic acid and ethylene glycol, 1.4-butanediol, Polyester obtained from glycols such as 1,4,6,7 .
- the method of the present invention is suitably used for the decomposition of aliphatic polyesters, especially lactic acid, glycolic acid or a polymer composed of lactic acid and glycolic acid. .
- the molecular weight of the polymer of these aliphatic polyesters is preferably from 2.0000 to 1.0000.000.
- polylactic acid particularly poly L-lactic acid, is preferred.o
- the device of the present invention can carry out the method for decomposing a polymer of the present invention, and it is sufficient that the polymer can be decomposed.
- the device of the present invention may be used, if necessary, with stirring means and aeration. Means, temperature control means and humidity control means.
- Examples of the device of the present invention include those as shown in FIGS. 1 and 2.
- a lower net 2 is formed at the bottom of the main body 1, and a corner formed by the bottom and the side wall of the main body 1 is preferably slightly rounded.
- the upper part of the main body 1 is covered with a lid 2.
- An upper net 4 is formed on the lid 2. Both the lower net 2 and the upper net 4 facilitate the flow of gas and moisture in the body.
- An aeration hole may be formed on the side of the main unit as an aeration means.
- the main body 1 is provided with a stirring means, which is constituted by a stirring shaft 6 and a stirring blade 7. By rotating the stirring shaft 6 by a motor or the like, the stirring blades 7 rotate, and the contents inside the main body are stirred.
- the shape, number and position of the stirring blades 7 can be arbitrarily changed.
- the temperature inside the body can be adjusted.
- each carrier shown in Table 1 were placed one by 1 OO m L beaker 5 0 cm 3, of the medium maximum water retention of the carrier of the composition shown in Table 2, La 5 0 wt% Ryokuwae, 1 2 At 0, steam sterilized for 30 minutes.
- the culture medium of Baci l lus subti lis MT-10658 was one ⁇ cultured in a medium having the composition shows in Table 2 lm L (about 1 ⁇ ⁇ ce 1 1 s / m L) Was inoculated.
- Bresphizolem 1 x 2 cm in size, formed from 1 g of poly-L-l-lactic acid having a molecular weight of about 100,000 is sterilized with 70% alcohol, inserted into a carrier, and heated to 37 ° C. Kept.
- the decomposition state of the breath film was observed over time, and the results are shown in Table 1.
- Table 1 shows the decomposition state when the microorganisms were grown in the liquid medium shown in Table 2 without using them, and the film was introduced.
- the term “decomposition” means that when the decomposition state of the breath film was visually observed, the breath film was no longer visible (it disappeared). Thereafter, the same criterion was used.
- the maximum water retention was 40% by weight (g (water) Z 8 (dry carrier)) or more and 4.0000% by weight (g (water) Z g (dry carrier)) and the porosity was 25
- Non-woven fabric is non-woven fabric PLP (manufactured by Nippon Learnine Co., Ltd.)
- molecular sieve is molecular sieve 3A (manufactured by Wako Pure Chemical Industries, Ltd.)
- One Mikiyu Light is a bar Mikiyu Light Gold (Saka Evening Seed Co., Ltd.)
- the par light is par light M-1 (particle size: 1.5-3.0) (Sakata Seed Co., Ltd.)
- stainless steel fiber is eggplant.
- each carrier as shown in Table 3 one 1 ⁇ Table 3 one 3 placed 1 OO m L beaker in 5 0 cm 3, the composition that shows the second table et media carrier
- the mixture was steam-sterilized with 120 at 30 minutes, and then cooled to 37 ° C.
- the culture solution lmL (approximately 10 ⁇ eells ZmL) was inoculated, and then sterilized with 70% alcohol.
- the film was inserted into the carrier and kept at 37. The decomposition state of the breath film was observed over time, and the results are shown in Tables 3-11 to 13-13.
- Rice husk 90 0 or more 1
- Non-woven fabric 90 Decomposition No more than 17 Decomposition No change
- Clay soil 90 or more 90 or more changed and changed No change or carrier 90 or more and 90 or more changed only medium No change No change Table 3-12 Inoculated microorganisms
- Nonwoven fabric 23 Decomposed by 3 15 Decomposed by 5 5 Molecular decomposed by 50 30 Decomposed by 30 Sieve
- Vermiculite 37 Decompose by saying 19
- Decompose by saying Norite 27 Decompose by saying 25 25 Mucous soil 90 or more 90 or more Change or change No change Carrier None 90 or more 90 or more Medium No change No change Table 3-13 Inoculated microorganisms
- Standard Activated Sludge Soil Extract Bacteria Sawdust 27 Decompose by saying 31 1 Hull decompose by saying 25 Husk 2 Decompose by saying 33 Bran 2 8 Decompose by 3 34 2 5 Decomposition by foaming resin 2 2 Decomposition by 2 7 27 Decomposition by foam Polyvinyl 4 2 Decomposition by 4 5 Decomposition by 5
- Bacillus subti 1 is MT-10658, which is a single microorganism shown in Tables 4 and 5, was cultured.
- Table 4 one 1-Table 4 - 2 each carrier shows in a 5 0 cm 3 placed in 1 OO m L beaker, composition which shows in Table 2 to be al media carrier 50% by weight of the maximum water retention was added, steam sterilized at 120 ° C for 30 minutes, and then cooled to 37 ° C. Then, the above culture broth lmL (about 10 ⁇ eel I / mL) was inoculated, and then sterilized with 70% alcohol in the next step.
- the copolymer of poly (L-lactic acid) and polybutylene succinate and the polyfilm of polybutylene succinate homopolymer were degraded.
- the maximum water retention as a carrier is 40% by weight (g (water) Zg (dry carrier)) or more and 4,000% by weight or less, and the porosity is 25% or more and less than 100%. If no solid phase was used, no decomposition occurred.
- Mucous soil 90 or more 90 or more No change No change No carrier 90 or more 90 or more Medium only No change No change
- the maximum water retention of the entire carrier contained in the solid phase was 250% by weight, and the porosity of the solid phase was 60%.
- the maximum water retention of the entire carrier contained in the solid phase was 220% by weight, and the porosity of the solid phase was 60%.
- the maximum water retention of the entire carrier contained in the solid phase was 220% by weight, and the porosity of the solid phase was 50%.
- the carrier contained in the solid phase
- the total maximum water retention was 140% by weight, and the porosity of the solid phase was 60%.
- the maximum water retention of the entire carrier contained in the solid phase was 220% by weight, and the porosity of the solid phase was 20%.
- Self-prepared composts are composts produced by current composting, ie, composts that have different properties depending on the location and time of collection. Although it was assumed that the carrier and early nutrients were used, a large variation occurred in the decomposition of the breath film. Table 5.Raw material culture period
- a polymer having a high strength at the time of use especially a polymer composed of lactic acid, glycolic acid or lactic acid and glycolic acid, is obtained. , Can be disassembled quickly and reliably. Further, there is provided a polymer decomposition treatment apparatus capable of promptly decomposing a polymer by the method of the present invention.
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Zoology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Genetics & Genomics (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
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- Mycology (AREA)
- General Chemical & Material Sciences (AREA)
- Tropical Medicine & Parasitology (AREA)
- Sustainable Development (AREA)
- Dispersion Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Virology (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Biological Depolymerization Polymers (AREA)
- Processing Of Solid Wastes (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
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Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP96903251A EP0761732B1 (en) | 1995-02-28 | 1996-02-27 | Method of degrading polymer |
| DE69632849T DE69632849T2 (de) | 1995-02-28 | 1996-02-27 | Verfahren zum abbau von polymeren |
| FI964266A FI964266L (fi) | 1995-02-28 | 1996-02-27 | Polymeerien hajottamismenetelmä |
| KR1019960706031A KR100188446B1 (ko) | 1995-02-28 | 1996-02-27 | 폴리머의 분해방법 |
| US08/725,506 US6313194B1 (en) | 1995-02-28 | 1996-10-04 | Degrading method of polymer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4024095 | 1995-02-28 | ||
| JP7/40240 | 1995-02-28 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US08/725,506 Continuation US6313194B1 (en) | 1995-02-28 | 1996-10-04 | Degrading method of polymer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1996026974A1 true WO1996026974A1 (en) | 1996-09-06 |
Family
ID=12575199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1996/000448 Ceased WO1996026974A1 (en) | 1995-02-28 | 1996-02-27 | Method of degrading polymer |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6313194B1 (ja) |
| EP (1) | EP0761732B1 (ja) |
| KR (1) | KR100188446B1 (ja) |
| DE (1) | DE69632849T2 (ja) |
| FI (1) | FI964266L (ja) |
| WO (1) | WO1996026974A1 (ja) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6740731B2 (en) * | 1988-08-08 | 2004-05-25 | Cargill Dow Polymers Llc | Degradation control of environmentally degradable disposable materials |
| DE19754063A1 (de) * | 1997-12-05 | 1999-06-10 | Bayer Ag | Abbau von biologisch abbaubaren Polymeren |
| WO2003099987A1 (en) * | 2002-05-23 | 2003-12-04 | Unilever N.V. | Article and process for cleaning fabrics |
| JP2007106783A (ja) * | 2005-10-11 | 2007-04-26 | Fujitsu Ltd | 樹脂成型体およびこれを用いた電子機器、樹脂成型体の処理方法 |
| US8258364B2 (en) | 2008-06-16 | 2012-09-04 | Renaud Regis P | Method for steam biomass reactor |
| IT1403272B1 (it) * | 2010-12-20 | 2013-10-17 | Novamont Spa | Strutture oligomeriche complesse |
| KR20160015253A (ko) | 2013-05-10 | 2016-02-12 | 쥬세로 인코퍼레이티드 | 착즙 시스템 및 방법 |
| JP6489542B2 (ja) * | 2013-12-04 | 2019-03-27 | 国立大学法人帯広畜産大学 | ウレタンの分解方法およびウレタンの分解剤 |
| US10543652B2 (en) | 2016-03-03 | 2020-01-28 | Fresh Press LLC | Press |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50148580A (ja) * | 1974-05-20 | 1975-11-28 | ||
| JPH06292587A (ja) * | 1993-04-09 | 1994-10-21 | Nok Corp | 高分子量ポリエチレングリコ−ルの分解方法 |
| JPH06328060A (ja) * | 1993-05-27 | 1994-11-29 | Sanyo Electric Co Ltd | 厨芥処理装置 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5618587A (en) * | 1979-07-20 | 1981-02-21 | Tottori Daigaku | Decomposition and assimilation of polyvinyl alcohol by symbiotic bacteria |
| US5378738A (en) * | 1991-10-31 | 1995-01-03 | Kabushiki Kaisha Kobe Seiko Sho | Biodegradable plastic |
| JP3194792B2 (ja) * | 1992-06-12 | 2001-08-06 | 天野エンザイム株式会社 | 酵素を用いた脂肪族ポリエステルの分解法 |
| DE69403826T2 (de) * | 1993-02-16 | 1997-10-16 | Sanyo Electric Co | Vorrichtung zur Entzorgung von Küchenabfällen |
| JPH06319533A (ja) * | 1993-05-14 | 1994-11-22 | Sumitomo Metal Ind Ltd | 新規微生物及びそれを用いた廃棄物の分解処理方法 |
-
1996
- 1996-02-27 EP EP96903251A patent/EP0761732B1/en not_active Expired - Lifetime
- 1996-02-27 DE DE69632849T patent/DE69632849T2/de not_active Expired - Lifetime
- 1996-02-27 KR KR1019960706031A patent/KR100188446B1/ko not_active Expired - Lifetime
- 1996-02-27 FI FI964266A patent/FI964266L/fi unknown
- 1996-02-27 WO PCT/JP1996/000448 patent/WO1996026974A1/ja not_active Ceased
- 1996-10-04 US US08/725,506 patent/US6313194B1/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50148580A (ja) * | 1974-05-20 | 1975-11-28 | ||
| JPH06292587A (ja) * | 1993-04-09 | 1994-10-21 | Nok Corp | 高分子量ポリエチレングリコ−ルの分解方法 |
| JPH06328060A (ja) * | 1993-05-27 | 1994-11-29 | Sanyo Electric Co Ltd | 厨芥処理装置 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP0761732A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0761732A1 (en) | 1997-03-12 |
| FI964266A7 (fi) | 1996-11-18 |
| FI964266A0 (fi) | 1996-10-23 |
| US6313194B1 (en) | 2001-11-06 |
| DE69632849T2 (de) | 2005-06-30 |
| FI964266L (fi) | 1996-11-18 |
| KR970702926A (ko) | 1997-06-10 |
| KR100188446B1 (ko) | 1999-06-01 |
| EP0761732A4 (en) | 1998-04-08 |
| DE69632849D1 (de) | 2004-08-12 |
| EP0761732B1 (en) | 2004-07-07 |
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