GB774961A - Improvements in or relating to production of tyrosine - Google Patents
Improvements in or relating to production of tyrosineInfo
- Publication number
- GB774961A GB774961A GB24832/55A GB2483255A GB774961A GB 774961 A GB774961 A GB 774961A GB 24832/55 A GB24832/55 A GB 24832/55A GB 2483255 A GB2483255 A GB 2483255A GB 774961 A GB774961 A GB 774961A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tyrosine
- solution
- liquors
- mother
- cool
- 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
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C229/00—Compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C229/02—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton
- C07C229/34—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton containing six-membered aromatic rings
- C07C229/36—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton containing six-membered aromatic rings with at least one amino group and one carboxyl group bound to the same carbon atom of the carbon skeleton
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
L-Tyrosine is obtained in an improved crystalline form by admixing with an aqueous solution containing tyrosine (preferably between 5 and 15 grams per litre), sufficient non-oxidizing mineral acid, preferably HCl, to adjust the pH of said solution to between 1.3 and 2.2, heating the resulting solution to between 50 DEG and 100 DEG C., preferably between 70 DEG and 90 DEG C., until substantially all of the tyrosine has dissolved and allowing the hot solution to cool at an average rate of less than 0.25 DEG C. per minute to a temperature between atmospheric temperature and 60 DEG C., when the tyrosine crystallizes out. After separation of the tyrosine crystals, the mother-liquors are recycled by the addition of more tyrosine. The crystals (glossy white needles) have a size up to about 2.5 mm. by about 0.015 mm. (average size 0.2 mm. X 0.015 mm.) and the ratio of length/width is from 20:1 to 5:1. In examples: (1) tyrosine is mixed with water and acidified with HCl to pH 1.8, decolorising carbon is added, and the mixture heated and stirred at 85 DEG C. for 10 minutes, filtered hot and allowed to cool without agitation, yielding tyrosine as needles, which are washed and dried at 105 DEG C.; (2) tyrosine is dissolved in mother-liquors from (1) and the solution treated as before.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US774961XA | 1955-01-17 | 1955-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB774961A true GB774961A (en) | 1957-05-15 |
Family
ID=22138401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24832/55A Expired GB774961A (en) | 1955-01-17 | 1955-08-30 | Improvements in or relating to production of tyrosine |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB774961A (en) |
-
1955
- 1955-08-30 GB GB24832/55A patent/GB774961A/en not_active Expired
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