JPS554357A - Preparation of high-grade p-nitrotoluenesulfonic acid - Google Patents
Preparation of high-grade p-nitrotoluenesulfonic acidInfo
- Publication number
- JPS554357A JPS554357A JP7777878A JP7777878A JPS554357A JP S554357 A JPS554357 A JP S554357A JP 7777878 A JP7777878 A JP 7777878A JP 7777878 A JP7777878 A JP 7777878A JP S554357 A JPS554357 A JP S554357A
- Authority
- JP
- Japan
- Prior art keywords
- parts
- acid
- nitrotoluene
- vol
- grade
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To obtain the title compound, a raw material for intermediates for fluorescent brightening agents, in high yield without clogging the gas inlet, by reacting p-nitrotoluene containing a specific amount of fuming sulfuric acid with a highly conc. gaseous sulfuric anhydride.
CONSTITUTION: 3W20 parts by wt., preferably 5W8 parts by wt., of conc. or fuming sulfuric acid is dissolved in 100 parts by wt. of p-nitrotoluene (T). A mixture of gaseous sulfuric anhydride and an inert gas is introduced into T. at 50W130°C, preferably at 70W100°C, with stirring to give p-nitrotoluenesulfonic acid. The concentration of the gaseous sulfuric anhydride is 20W90 vol.%, preferably 30W70 vol.%, and its amount is 1.0W1.2 moles per mole of T.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7777878A JPS554357A (en) | 1978-06-27 | 1978-06-27 | Preparation of high-grade p-nitrotoluenesulfonic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7777878A JPS554357A (en) | 1978-06-27 | 1978-06-27 | Preparation of high-grade p-nitrotoluenesulfonic acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS554357A true JPS554357A (en) | 1980-01-12 |
| JPS627910B2 JPS627910B2 (en) | 1987-02-19 |
Family
ID=13643412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7777878A Granted JPS554357A (en) | 1978-06-27 | 1978-06-27 | Preparation of high-grade p-nitrotoluenesulfonic acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS554357A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58118555A (en) * | 1981-12-31 | 1983-07-14 | チバ―ガイギ アクチエンゲゼルシヤフト | Process for manufacturing p-nitrotoluene-2- sulfonic acid |
| EP0143750A2 (en) * | 1983-11-28 | 1985-06-05 | Ciba-Geigy Ag | Process for the preparation of 4-nitrotoluene-2-sulfonic acid |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01118709U (en) * | 1988-02-04 | 1989-08-10 | ||
| KR102534283B1 (en) * | 2022-03-23 | 2023-05-30 | (주) 푸드베이코리아 | A decorative chocolate composition and a method for preparing thereof |
-
1978
- 1978-06-27 JP JP7777878A patent/JPS554357A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58118555A (en) * | 1981-12-31 | 1983-07-14 | チバ―ガイギ アクチエンゲゼルシヤフト | Process for manufacturing p-nitrotoluene-2- sulfonic acid |
| JPH0480900B2 (en) * | 1981-12-31 | 1992-12-21 | Ciba Geigy | |
| EP0143750A2 (en) * | 1983-11-28 | 1985-06-05 | Ciba-Geigy Ag | Process for the preparation of 4-nitrotoluene-2-sulfonic acid |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS627910B2 (en) | 1987-02-19 |
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