JPS57126466A - Production of diphenylurea - Google Patents
Production of diphenylureaInfo
- Publication number
- JPS57126466A JPS57126466A JP1187081A JP1187081A JPS57126466A JP S57126466 A JPS57126466 A JP S57126466A JP 1187081 A JP1187081 A JP 1187081A JP 1187081 A JP1187081 A JP 1187081A JP S57126466 A JPS57126466 A JP S57126466A
- Authority
- JP
- Japan
- Prior art keywords
- reaction
- sulfite
- sulfochloride
- salt
- acid
- 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: The reaction of a sulfochloride with a sulfite salt gives a symmetric diphenyliureadisulfinic acid or its salt used as an intermediate of dyes with industrial advantages.
CONSTITUTION: The reaction between a sulfochloride of formulaIand a sulfite salt such as lithium sulfite is conducted in an air or nitrogen atmospher at 30W 50°C to give the objective compound of formula II. The amount of the sulfite used in this reaction is 3W10mol per mole of the sulfochloride. The reaction may be effected in the presence of a solvent, however, preferably it is carried out in an aqueous medium, while the reaction system is always kept in pH to 7W11 using an appropriate alkali. The product is isolated directly from the reaction mixture or after acidification as the free acid.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1187081A JPS57126466A (en) | 1981-01-27 | 1981-01-27 | Production of diphenylurea |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1187081A JPS57126466A (en) | 1981-01-27 | 1981-01-27 | Production of diphenylurea |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57126466A true JPS57126466A (en) | 1982-08-06 |
Family
ID=11789751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1187081A Pending JPS57126466A (en) | 1981-01-27 | 1981-01-27 | Production of diphenylurea |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57126466A (en) |
-
1981
- 1981-01-27 JP JP1187081A patent/JPS57126466A/en active Pending
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