JPS55111459A - Preparation of cysteamine - Google Patents
Preparation of cysteamineInfo
- Publication number
- JPS55111459A JPS55111459A JP1783279A JP1783279A JPS55111459A JP S55111459 A JPS55111459 A JP S55111459A JP 1783279 A JP1783279 A JP 1783279A JP 1783279 A JP1783279 A JP 1783279A JP S55111459 A JPS55111459 A JP S55111459A
- Authority
- JP
- Japan
- Prior art keywords
- solvent
- ethyleneimine
- cysteamine
- hydrogen sulfide
- molar ratio
- 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.)
- Granted
Links
Abstract
PURPOSE: To obtain cysteamine in high yield industrially advantageously, by reacting ethyleneimine with hydrogen sulfide at a specific reaction pressure, temperature, and molar ratio of hydrogen sulfide to ethyleneimine in a monohydric lower alcohol as a solvent.
CONSTITUTION: Ethyleneimine (E) is reacted with hydrogen sulfide (S) in the presence of a lower monohydric alcohol, e.g. methanol or ethanol, as a solvent at -10W+40°C, 1.5kg/cm2G or above, and a molar ratio of S to E≥1.5:1 to give cysteamine with a markedly suppressed by-product sulfide formation. This method provides the product industrially advantageously compared with the conventional one, wherein the reaction is carried out at a low temperature of -70W-80°C or a solvent is used in a large quantity.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1783279A JPS55111459A (en) | 1979-02-20 | 1979-02-20 | Preparation of cysteamine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1783279A JPS55111459A (en) | 1979-02-20 | 1979-02-20 | Preparation of cysteamine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55111459A true JPS55111459A (en) | 1980-08-28 |
JPS6244546B2 JPS6244546B2 (en) | 1987-09-21 |
Family
ID=11954669
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1783279A Granted JPS55111459A (en) | 1979-02-20 | 1979-02-20 | Preparation of cysteamine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55111459A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5256362A (en) * | 1989-07-14 | 1993-10-26 | Nippon Shokubai Co., Ltd. | Method for production of granular cysteamine hydrochloride |
-
1979
- 1979-02-20 JP JP1783279A patent/JPS55111459A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5256362A (en) * | 1989-07-14 | 1993-10-26 | Nippon Shokubai Co., Ltd. | Method for production of granular cysteamine hydrochloride |
Also Published As
Publication number | Publication date |
---|---|
JPS6244546B2 (en) | 1987-09-21 |
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