EP0020124B1 - Entkationisierung wässeriger Zuckerlösungen - Google Patents

Entkationisierung wässeriger Zuckerlösungen Download PDF

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Publication number
EP0020124B1
EP0020124B1 EP80301751A EP80301751A EP0020124B1 EP 0020124 B1 EP0020124 B1 EP 0020124B1 EP 80301751 A EP80301751 A EP 80301751A EP 80301751 A EP80301751 A EP 80301751A EP 0020124 B1 EP0020124 B1 EP 0020124B1
Authority
EP
European Patent Office
Prior art keywords
resin
sugar
exchange resin
weak
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
Application number
EP80301751A
Other languages
English (en)
French (fr)
Other versions
EP0020124A1 (de
Inventor
Gérard Rousseau
Claude Lamotte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GENERALE SUCRIERE SA
Rohm and Haas France SAS
Original Assignee
GENERALE SUCRIERE SA
Rohm and Haas France SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GENERALE SUCRIERE SA, Rohm and Haas France SAS filed Critical GENERALE SUCRIERE SA
Publication of EP0020124A1 publication Critical patent/EP0020124A1/de
Application granted granted Critical
Publication of EP0020124B1 publication Critical patent/EP0020124B1/de
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B20/00—Purification of sugar juices
    • C13B20/14—Purification of sugar juices using ion-exchange materials
    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B20/00—Purification of sugar juices
    • C13B20/14—Purification of sugar juices using ion-exchange materials
    • C13B20/142—Mixed bed

Definitions

  • This invention is concerned with the purification of (i.e. complete or partial removal of ions and colour bodies from) aqueous sugar solutions.
  • the field to which the invention relates is the purification of solutions in sugar refineries or mills by removal of some or all cations, anions and colour bodies using ion exchange resins.
  • U.S. Patent 2926110 discloses the use of a mixture of weak anion and cation resins to partly desalt and decolourise sugar solutions in a continuous column operation. However this patent teaches the necessity for this purification to be completed by subsequently contacting the partly purified solution with a strong resin. Nowhere is there any teaching that the mixture of weak resins can alone split the impurity salts and satisfactorily purify the solution without inverting the sugar if used in a batch process with a long contact time.
  • this invention provides a process for the decationisation of an aqueous sugar solution wherein the solution is passed into contact with ion exchange resin in a batch reaction, agitated therewith and separated therefrom and wherein the resin comprises a mixture of weak acid cation exchange resin in the hydrogen form and a weak base anion exchange resin, the temperature is 20 to 90°C, preferably 40 to 90°C, most preferably 50 to 65°C, and the contact time between the resin and the sugar solution is at most 90 minutes.
  • Any weak acid cation exchange resin can be used in admixture with the weak base anion exchange resin in the deionisation and decolourisation process of the invention.
  • the most preferred are acrylic acid/divinylbenzene resins such as Amberlite IRC-84 or methacrylic acid/divinylbenzene resins such as Amberlite IRC-50 also commercially available from Rohm and Haas Company.
  • the weak acid cation exchange resins are used in the process of the invention in a mixed bed of resins containing weak base anion exchange resins whereupon deionisation and removal of some colour bodies can be achieved.
  • Any weak base anion exchange resin can be used for this purpose.
  • acrylic anion exchange resins such as the macroreticular resin Amberlite IRA-35 and the gel resin Amberlite IRA-68 (both commercially available from Rohm and Haas Company) since these afford minimal regenerant requirement and optimal decolourisation efficiency.
  • the sugar solutions capable of being treated by the process of the invention may be any aqueous solution of sugar (including molasses) to be found, or which can be made up, in a sugar mill or refinery operation.
  • the impurities generally contained in such solutions are those organic and mineral salts found in the sugar beet and sugar cane, such as betaine, pyrrolidone carboxylic acid, amino acids and sodium and potassium salts.
  • the anion exchange resin will partially or completely deionise the solution by removing the mineral and/or organic acids resulting from the cation exchange to liberate water, the anion exchange resin being in the free base form.
  • the exhausted ion exchange resin will therefore need to be regenerated to remove the exchanged ions and reconvert it to free base form.
  • the anion exchange resin will remove colour bodies usually present in the sugar solution and these can be eluted from the resin along with the exchanged ions during regeneration.
  • Regeneration of the cation exchange resin can be effected in known manner by contacting the exhausted resin with strong mineral acid.
  • Regeneration of the anion exchange resin, and removal of colour bodies therefrom, can conveniently be achieved by contacting the resin with ammonia or a solution of a strong base.
  • the concentrations of solutions which can be treated by the process of this invention may be as high as 88 Brix. This is of course much higher than the concentrations treatable by prior art fixed bed processes.
  • the solutions treated may already be present in the sugar mills or refineries at the indicated concentration or any existing refinery or mill streams which have lower Brix values can be concentrated, for example by evaporation or mixing to increase their Brix values.
  • the invention can be used to treat standard syrup, poor strike machine syrups and molasses.
  • the proportions of resin to sugar which would effectively decationise and deionise the sugar solution depend, amongst other things, on the level and nature of the impurities, the resin chosen, the temperature, concentration and time of contact and will be optimised by trial-and-error experimentation in any particular case.
  • the ratio may be expressed as a ratio of resin volume (mls) to weight of non-sugar (grams) impurities. Depending on the operating conditions, this ratio would generally be 1.0 to 3.0, most usually 1.2 to 1.6, for decationisation alone.
  • temperatures from 20 to 90°C, more preferably 40 to 90°C, most preferably 50 to 65°C, and a contact time of 60 to 90 minutes. Under these conditions solutions up to 88 Brix can be treated.
  • the purity of the treated sugar was increased to 94.5% (from 91.5%) and 75% of the colour bodies were removed as was 62% of the potassium.
  • the sucrose yield is increased by 1.5 times the weight of non-sucrose removed.
  • Amberlite IRA-35 is a macroreticular acrylic weak base anion exchange resin.
  • Amberlite IRA-68 is a gel acrylic weak base anion exchange resin.
  • Amberlite IRC-84 is a gel acrylic acid weak cation exchange resin.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Saccharide Compounds (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)

Claims (6)

1. Verfahren zur Dekationisierung einer wäßrigen Zuckerlösung, bei welchem die Lösung in Kontakt mit einem Ionenaustauscherharz in eine Chargenreaktion eingeführt, damit verrührt und davon abgetrennt wird, wobei das Harz aus einer Mischung aus einem schwachen Kationenaustauscherharz in der Wasserstofform und einem schwachen Basenanionenaustauscherharz besteht und die Temperatur 20 bis 90°C und die Kontaktzeit zwischen dem Harz und der Zuckerlösung höchstens 90 Minuten betragen.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die eingesetzte Zuckerlösung eine Konzentration von bis zu 88 Brix besitzt.
3. Verfahren nach Anspruch 2, dadurch gekennzeichent, daß eine Temperatur von 40 bis 90°C eingehalten wird.
4. Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß eine Kontaktzeit von 60 bis 90 Minuten eingehalten wird.
5. Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß ein Volumenverhältnis des Kationen- zu dem Anionenharz von 1 : bis 1:5 une eine Kontaktzeit von 30 bis 90 Minuten eingehalten wird.
6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Rühren wenigstens teilweise in der Weise bewirkt wird, daß Luft durch das Harzbett in Kontakt mit der Zuckerlösung geleitet wird..
EP80301751A 1979-05-30 1980-05-28 Entkationisierung wässeriger Zuckerlösungen Expired EP0020124B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7918716 1979-05-30
GB7918716 1979-05-30

Publications (2)

Publication Number Publication Date
EP0020124A1 EP0020124A1 (de) 1980-12-10
EP0020124B1 true EP0020124B1 (de) 1983-02-16

Family

ID=10505515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80301751A Expired EP0020124B1 (de) 1979-05-30 1980-05-28 Entkationisierung wässeriger Zuckerlösungen

Country Status (6)

Country Link
EP (1) EP0020124B1 (de)
AU (1) AU535842B2 (de)
CA (1) CA1138444A (de)
DE (1) DE3062000D1 (de)
FI (1) FI65800C (de)
ZA (1) ZA803177B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8602318A (nl) * 1986-09-12 1988-04-05 Suiker Unie Werkwijze voor het demineraliseren van bietsuiker-dunsap.
EP0308521B1 (de) * 1987-09-19 1991-10-23 Kernforschungszentrum Karlsruhe Gmbh Verfahren zur Entfernung von störenden organischen Stoffen und anorganischen Anionen aus Zuckerlösungen
US8864995B2 (en) 2006-01-10 2014-10-21 Dupont Nutrition Biosciences Aps Method for separating betaine
JP2015091909A (ja) * 2013-11-08 2015-05-14 日本錬水株式会社 低糖化澱粉糖液の精製方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926110A (en) * 1957-07-25 1960-02-23 Shimizu Hiroshi Process for the purification of beet sugar juice by means of ion exchange resins

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2402960A (en) * 1942-07-22 1946-07-02 Infilco Inc Process of clarifying sugar solutions
US2578937A (en) * 1948-05-22 1951-12-18 Rohm & Haas Mixed bed deionization
US2578938A (en) * 1950-06-15 1951-12-18 Rohm & Haas Deionization of sugar solutions
FR1214170A (fr) * 1957-07-25 1960-04-07 Nippon Beet Sugar Mfg Perfectionnements au procédé pour la purification des jus sucrés de betteraves au moyen de résines d'échange d'ions

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926110A (en) * 1957-07-25 1960-02-23 Shimizu Hiroshi Process for the purification of beet sugar juice by means of ion exchange resins

Also Published As

Publication number Publication date
CA1138444A (en) 1982-12-28
DE3062000D1 (de) 1983-03-24
FI801749A7 (fi) 1980-12-01
AU5878480A (en) 1980-12-04
EP0020124A1 (de) 1980-12-10
FI65800C (fi) 1984-07-10
FI65800B (fi) 1984-03-30
ZA803177B (en) 1981-06-24
AU535842B2 (en) 1984-04-05

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