ES408104A1 - PROCEDURE FOR THE RECOVERY OF EPSILON-CAPROLACTAMA PURA - Google Patents
PROCEDURE FOR THE RECOVERY OF EPSILON-CAPROLACTAMA PURAInfo
- Publication number
- ES408104A1 ES408104A1 ES0408104A ES408104A ES408104A1 ES 408104 A1 ES408104 A1 ES 408104A1 ES 0408104 A ES0408104 A ES 0408104A ES 408104 A ES408104 A ES 408104A ES 408104 A1 ES408104 A1 ES 408104A1
- Authority
- ES
- Spain
- Prior art keywords
- lactam
- organic solvent
- water
- emulsion
- solution
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title abstract 2
- 238000011084 recovery Methods 0.000 title abstract 2
- 101001137337 Homo sapiens Transcriptional activator protein Pur-alpha Proteins 0.000 title 1
- 102100035715 Transcriptional activator protein Pur-alpha Human genes 0.000 title 1
- 150000003951 lactams Chemical class 0.000 abstract 5
- 239000003960 organic solvent Substances 0.000 abstract 4
- 239000000839 emulsion Substances 0.000 abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 abstract 2
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 abstract 2
- 239000000243 solution Substances 0.000 abstract 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 abstract 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract 1
- 239000003377 acid catalyst Substances 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 abstract 1
- 235000011130 ammonium sulphate Nutrition 0.000 abstract 1
- 125000000129 anionic group Chemical group 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 125000002091 cationic group Chemical group 0.000 abstract 1
- 238000010790 dilution Methods 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 238000006386 neutralization reaction Methods 0.000 abstract 1
- 150000002894 organic compounds Chemical class 0.000 abstract 1
- 150000002923 oximes Chemical class 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
Landscapes
- Other In-Based Heterocyclic Compounds (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
Abstract
A procedure for the recovery of ε -caprolactam pure containing less than 5 meq., of ionogenic substances per kg of lactam, obtained by intramolecular conversion of oxime of cyclohexanone with the help of an acid catalyst that comes from the group of sulfuric acid, oleum or sulfur trioxide, and extraction of the reaction mixture-after dilution with water and, optionally, after partial neutralization of the sulfuric acid- with an organic solvent of the water-immiscible lactam, characterized in that the solution resulting from the lactam in the organic solvent is neutralized with aqueous ammonia to a ph of at least 4.5 (measured at 20 [deg.] c.), with the formation of an emulsion of a 15-40% by weight aqueous solution of ammonium sulfate, emulsified with the organic solvent, said emulsion is washed countercurrently with demineralized water in a weight ratio of 4-20 parts, preferably 8-10 parts, of emulsion per part of water, the lactam is again extracted from the organic solvent in a known manner, while the aqueous lactam solution that results is evaporated, after having been released, if desired, from ionogenic organic compounds, in cationic and anionic exchangers . (Machine-translation by Google Translate, not legally binding)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES0408104A ES408104A1 (en) | 1972-10-28 | 1972-10-28 | PROCEDURE FOR THE RECOVERY OF EPSILON-CAPROLACTAMA PURA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES0408104A ES408104A1 (en) | 1972-10-28 | 1972-10-28 | PROCEDURE FOR THE RECOVERY OF EPSILON-CAPROLACTAMA PURA |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES408104A1 true ES408104A1 (en) | 1976-02-16 |
Family
ID=59033131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0408104A Expired ES408104A1 (en) | 1972-10-28 | 1972-10-28 | PROCEDURE FOR THE RECOVERY OF EPSILON-CAPROLACTAMA PURA |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES408104A1 (en) |
-
1972
- 1972-10-28 ES ES0408104A patent/ES408104A1/en not_active Expired
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