GB760575A - Improvements in and relating to the recovery of ascorbic acid - Google Patents
Improvements in and relating to the recovery of ascorbic acidInfo
- Publication number
- GB760575A GB760575A GB858353A GB858353A GB760575A GB 760575 A GB760575 A GB 760575A GB 858353 A GB858353 A GB 858353A GB 858353 A GB858353 A GB 858353A GB 760575 A GB760575 A GB 760575A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- ascorbic acid
- effected
- exchange resin
- ionic separation
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D307/56—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D307/62—Three oxygen atoms, e.g. ascorbic acid
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention comprises a process for the recovery of ascorbic acid from a solution containing mixed components by subjecting a solution to a treatment which includes ionic separation by contact with ion-exchange resin or resins whereby a second solution which contains the bulk of the ascorbic acid and is substantially free from un-ionized components, is separated from the original solution, oxidizing the second solution to convert the ascorbic acid into dehydro-ascorbic acid while leaving other ions substantially unaffected, subjecting the oxidized solution to ionic separation by contact with ion-exchange resin or resins whereby a solution containing substantially only neutral dehydro-ascorbic acid is separated from a solution containing substantially only other ionized components, and reducing the dehydroascorbic acid solution thereby reconverting it to ascorbic acid solution. The first ionic separation may be effected by contacting the original solution first with a strongly acidic cation-exchange resin and then with a weakly basic anion-exchange resin, eluting the anionexchange resin with a strong acid to form the second solution. Alternatively the ionicexchange steps may be effected in multichamber ion-exchange membrane cells which comprise alternating cationic membranes and non-selective membranes or alternating cationic and anionic membranes having an electrode at each end of the cell. Prior to the first ionic separation the solution may be subjected to a preliminary treatment which consists in adjusting the pH to about 4 and an ionic separation to remove a substantial proportion of the ionized compounds. Oxidation may be effected either at the anode of an electrolytic cell or by contacting with an appropriate quantity of chlorine or sodium hypochlorite. Reduction of the dehydro-ascorbic acid may be effected by means of hydrogen sulphide or by catalytic hydrogenation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB858353A GB760575A (en) | 1953-03-27 | 1953-03-27 | Improvements in and relating to the recovery of ascorbic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB858353A GB760575A (en) | 1953-03-27 | 1953-03-27 | Improvements in and relating to the recovery of ascorbic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB760575A true GB760575A (en) | 1956-11-07 |
Family
ID=9855255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB858353A Expired GB760575A (en) | 1953-03-27 | 1953-03-27 | Improvements in and relating to the recovery of ascorbic acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB760575A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2179353A (en) * | 1985-07-05 | 1987-03-04 | Takeda Chemical Industries Ltd | Purifying l-ascorbic acid |
| WO1997013761A1 (en) * | 1995-10-11 | 1997-04-17 | Yissum Research Development Company Of The Hebrew University Of Jerusalem | A process for the recovery of ascorbic acid |
-
1953
- 1953-03-27 GB GB858353A patent/GB760575A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2179353A (en) * | 1985-07-05 | 1987-03-04 | Takeda Chemical Industries Ltd | Purifying l-ascorbic acid |
| US4767870A (en) * | 1985-07-05 | 1988-08-30 | Takeda Chemical Industries, Ltd. | Method of purifying L-ascorbic acid |
| GB2179353B (en) * | 1985-07-05 | 1989-07-12 | Takeda Chemical Industries Ltd | A method of purifying l-ascorbic acid |
| WO1997013761A1 (en) * | 1995-10-11 | 1997-04-17 | Yissum Research Development Company Of The Hebrew University Of Jerusalem | A process for the recovery of ascorbic acid |
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