GB870040A - Process for partially dehalogenating di- and trihaloacetic acid - Google Patents
Process for partially dehalogenating di- and trihaloacetic acidInfo
- Publication number
- GB870040A GB870040A GB24528/59A GB2452859A GB870040A GB 870040 A GB870040 A GB 870040A GB 24528/59 A GB24528/59 A GB 24528/59A GB 2452859 A GB2452859 A GB 2452859A GB 870040 A GB870040 A GB 870040A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- acetic acid
- tri
- hydrogen
- mainly
- 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
- C07C51/377—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups
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
Di- and tri-haloacetic acids are partially dehalogenated by passing the vapours escaping from the liquid acids or from their solution in a suitable solvent (such as acetic acid), with the help of a carrier gas or reduced pressure, at a temperature below 150 DEG C. and together with hydrogen, over a hydrogenation catalyst. Suitable carrier gases are hydrogen, nitrogen and carbon dioxide; suitable catalysts are metals of Group VIII of the Periodic Table and their salts. At 100-140 DEG C. di- and/or trichloroacetate acid produces mainly monochloroacetic acid, and at 60-100 DEG C. mainly dichloroacetic acid. At 60-100 DEG C. di- and/or tri-bromoacetic acid produces mainly monobromoacetic acid. A suitable starting material is the recycled liquid obtained by the continuous chlorination of acetic acid. Some acetic acid is also obtained.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE870040X | 1958-07-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB870040A true GB870040A (en) | 1961-06-07 |
Family
ID=6803491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24528/59A Expired GB870040A (en) | 1958-07-22 | 1959-07-16 | Process for partially dehalogenating di- and trihaloacetic acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB870040A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5191118A (en) * | 1989-04-07 | 1993-03-02 | Atochem | Catalytic dehalogenation of alpha-halogenated carboxylic acids/esters |
-
1959
- 1959-07-16 GB GB24528/59A patent/GB870040A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5191118A (en) * | 1989-04-07 | 1993-03-02 | Atochem | Catalytic dehalogenation of alpha-halogenated carboxylic acids/esters |
| US5278122A (en) * | 1989-04-07 | 1994-01-11 | Atochem | Catalyst for dehalogenation of alpha-halogenated carboxylic acids/esters |
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