GB1210495A - Selective crystallization - Google Patents
Selective crystallizationInfo
- Publication number
- GB1210495A GB1210495A GB2904267A GB2904267A GB1210495A GB 1210495 A GB1210495 A GB 1210495A GB 2904267 A GB2904267 A GB 2904267A GB 2904267 A GB2904267 A GB 2904267A GB 1210495 A GB1210495 A GB 1210495A
- Authority
- GB
- United Kingdom
- Prior art keywords
- slurry
- isomers
- nuclei
- solution
- line
- 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
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B57/00—Separation of optically-active compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1,210,495. Separating optical isomers; C- phenyl glycine. STRUTHERS SCIENTIFIC & INTERNATIONAL CORP. 23 Nov., 1967 [15 Nov., 1966; 23 June, 1967], Nos. 51077/66 and 29042/67. Heading C2C. [Also in Division B1] A process for the separation of optical isomers comprises the steps of (a) forming a solution of optical isomers; (b) cooling the solution to a degree sufficient to cause crystal growth without appreciable nucleation; (c) seeding the cooled solution with nuclei of one optical isomer; (d) allowing crystals to grow on the seed nuclei of the one optical isomer thereby forming a slurry; (e) removing small nuclei from the slurry; (f) recycling part of the slurry (freed from small nuclei) leaving step (e) back to step (d); (g) treating another part of the slurry (freed from small nuclei) from step (e) to remove crystals of one of the isomers therefrom; and (h) thereafter treating the solution from step (g) to recover at least one of the isomers therefrom. Small nuclei are separated in a filter, Fig. 3, in which a slurry is conducted through line 28 into body 29. Motor 32 drives the screw conveyer 33 to move large crystals across screen 30 to line 34. Mother liquor and fine craystals pass through screen 30 to leave through line 35. The separation of the isomers of C-phenyl glycine is described.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5107766 | 1966-11-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1210495A true GB1210495A (en) | 1970-10-28 |
Family
ID=10458559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2904267A Expired GB1210495A (en) | 1966-11-15 | 1966-11-15 | Selective crystallization |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1210495A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3933902A (en) | 1973-04-17 | 1976-01-20 | Asahi Kasei Kogyo Kabushiki Kaisha | Method for the optical resolution of DL-αphenylglycine |
| US4107203A (en) * | 1975-02-25 | 1978-08-15 | Nippon Kayaku Kabushiki Kaisha | Optical resolution of DL-α-phenylglycine hydrochloride |
| FR2396745A1 (en) * | 1977-07-07 | 1979-02-02 | Sumitomo Chemical Co | PROCESS FOR PREPARING AN OPTICALLY ACTIVE 2- (4-CHLOROPHENYL) -ISOVALERATE ALPHA-CYANO-3-PHENOXYBENZYL |
| EP0437369A2 (en) * | 1990-01-10 | 1991-07-17 | Merck & Co. Inc. | Formation and resolution of ibuprofen lysinate |
-
1966
- 1966-11-15 GB GB2904267A patent/GB1210495A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3933902A (en) | 1973-04-17 | 1976-01-20 | Asahi Kasei Kogyo Kabushiki Kaisha | Method for the optical resolution of DL-αphenylglycine |
| US4107203A (en) * | 1975-02-25 | 1978-08-15 | Nippon Kayaku Kabushiki Kaisha | Optical resolution of DL-α-phenylglycine hydrochloride |
| FR2396745A1 (en) * | 1977-07-07 | 1979-02-02 | Sumitomo Chemical Co | PROCESS FOR PREPARING AN OPTICALLY ACTIVE 2- (4-CHLOROPHENYL) -ISOVALERATE ALPHA-CYANO-3-PHENOXYBENZYL |
| EP0437369A2 (en) * | 1990-01-10 | 1991-07-17 | Merck & Co. Inc. | Formation and resolution of ibuprofen lysinate |
| EP0437369A3 (en) * | 1990-01-10 | 1992-06-10 | Merck & Co. Inc. | Formation and resolution of ibuprofen lysinate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |