GB958694A - Production of fumaric acid - Google Patents
Production of fumaric acidInfo
- Publication number
- GB958694A GB958694A GB2451461A GB2451461A GB958694A GB 958694 A GB958694 A GB 958694A GB 2451461 A GB2451461 A GB 2451461A GB 2451461 A GB2451461 A GB 2451461A GB 958694 A GB958694 A GB 958694A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bromine
- bromide
- maleic acid
- acid
- weight
- 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
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
- C07C51/353—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by isomerisation; by change of size of the carbon skeleton
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Fumaric acid is obtained by contacting aqueous maleic acid solution with a bromine-providing material wherein the oxidation state of the bromine is less than plus 5, and an oxidizing agent, the initial concentration of the maleic acid solution being from 10% to 70% by weight, the bromine-providing material being present in an amount equivalent in bromine content to at least 0.001% of ammonium bromide based on the weight of maleic acid, the oxidizing agent having a standard oxidation reduction potential of at least 1.23 volts and being present in an amount oxidatively equivalent to from 0.003% to 10% of ammonium persulphate based on the weight of the maleic acid. The process is carried out at 70 DEG to 100 DEG C. and the mixture is then cooled to form crystalline fumaric acid. In examples fumaric acid is obtained from maleic acid using cadmium ammonium bromide, ammonium bromide, and ammonium persulphate. Other bromine-containing materials mentioned are sodium bromide, hydrogen bromide, manganese bromide, elemental bromine, and N-bromosuccinimide. Other oxidizing agents mentioned are hydrogen peroxide, peracetic acid, perbenzoic acid, cumene hydroperoxide, t-butyl hydroperoxide, benzoyl peroxide, lauroyl peroxide, t-butyl peroxide, sodium perborate and chlorates. Specification 958,695 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US4100860A | 1960-07-06 | 1960-07-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB958694A true GB958694A (en) | 1964-05-21 |
Family
ID=21914215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2451461A Expired GB958694A (en) | 1960-07-06 | 1961-07-06 | Production of fumaric acid |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE605654A (en) |
| CH (1) | CH405277A (en) |
| DE (1) | DE1443109C3 (en) |
| ES (1) | ES268794A1 (en) |
| GB (1) | GB958694A (en) |
| LU (1) | LU40348A1 (en) |
| SE (1) | SE313808B (en) |
-
1961
- 1961-07-03 LU LU40348D patent/LU40348A1/xx unknown
- 1961-07-03 BE BE605654A patent/BE605654A/en unknown
- 1961-07-05 ES ES0268794A patent/ES268794A1/en not_active Expired
- 1961-07-06 DE DE19611443109 patent/DE1443109C3/en not_active Expired
- 1961-07-06 CH CH791661A patent/CH405277A/en unknown
- 1961-07-06 GB GB2451461A patent/GB958694A/en not_active Expired
- 1961-07-06 SE SE703461A patent/SE313808B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE605654A (en) | 1961-11-03 |
| DE1443109B2 (en) | 1974-08-29 |
| ES268794A1 (en) | 1961-12-16 |
| LU40348A1 (en) | 1961-09-04 |
| SE313808B (en) | 1969-08-25 |
| DE1443109C3 (en) | 1975-04-30 |
| CH405277A (en) | 1966-01-15 |
| DE1443109A1 (en) | 1968-10-24 |
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