JPS5746956A - Purification of guanidine salt - Google Patents
Purification of guanidine saltInfo
- Publication number
- JPS5746956A JPS5746956A JP12143880A JP12143880A JPS5746956A JP S5746956 A JPS5746956 A JP S5746956A JP 12143880 A JP12143880 A JP 12143880A JP 12143880 A JP12143880 A JP 12143880A JP S5746956 A JPS5746956 A JP S5746956A
- Authority
- JP
- Japan
- Prior art keywords
- guanidine salt
- earth metal
- alkaline earth
- salt
- guanidine
- 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.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: A guanidine salt is treated with a hydroxide of alkaline earth metal, whereby it is purified to give the objective guanidine salt that is used as a flame retarder for cellulosic materials, because of its improved heat stability and high purity, containing no insoluble substances.
CONSTITUTION: A guanidine salt is melted or dissolved in water and a hydroxide of alkaline earth metal such as Mg(OH)2 and/or oxide such as CaO and added thereto so that the ammonium salt included in the guanidine salt becomes less than 0.04mol% based on the guanidine salt. Then, the mixture is stirred and/or treated with a blowing gas such as nitrogen or air to expel the ammonia gas formed. Further, the insoluble substances are removed by filtration to give purified guanidine salt or its aqueous solution. Thermally unstable substances in the crude guanidine salt react with the alkaline earth metal compound to form insoluble salts, which are removed, whereby high thermal stability is maintained as a flame retarder.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12143880A JPS5746956A (en) | 1980-09-02 | 1980-09-02 | Purification of guanidine salt |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12143880A JPS5746956A (en) | 1980-09-02 | 1980-09-02 | Purification of guanidine salt |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5746956A true JPS5746956A (en) | 1982-03-17 |
Family
ID=14811133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12143880A Pending JPS5746956A (en) | 1980-09-02 | 1980-09-02 | Purification of guanidine salt |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5746956A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5523823A (en) * | 1978-08-03 | 1980-02-20 | Shin Meiwa Ind Co Ltd | Refrigerator |
-
1980
- 1980-09-02 JP JP12143880A patent/JPS5746956A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5523823A (en) * | 1978-08-03 | 1980-02-20 | Shin Meiwa Ind Co Ltd | Refrigerator |
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