GB1411214A - Process for purifying monochloroacetic acid - Google Patents
Process for purifying monochloroacetic acidInfo
- Publication number
- GB1411214A GB1411214A GB2024274A GB2024274A GB1411214A GB 1411214 A GB1411214 A GB 1411214A GB 2024274 A GB2024274 A GB 2024274A GB 2024274 A GB2024274 A GB 2024274A GB 1411214 A GB1411214 A GB 1411214A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- temperature
- hydrogen
- monochloroacetic acid
- dehalogenating
- 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
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/487—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
1411214 Purification of monochloroacetic acid HOECHST AG 8 May 1974 [11 May 1973] 20242/74 Heading C2C A process for the continuous purification of crude monochloroacetic acid by partially dehalogenating the di- and trichloroacetic acid impurities therein with hydrogen, to form monochloroacetic acid comprises the step of (a) intimately contacting the hydrogen with at least part of the hydrogenated product at a temperature of from 5 to 20‹ C. above the hydrogenation temperature; (b) dehalogenating the di- and trichloroacetic acids by trickling the molten crude acid at a temperature of from 110 to 155‹ C. through a hydrogenation catalyst comprising a noble metal of Group VIII of the periodic table which has been precipitated substantially on the geometric surface of an acid-resistant carrier, in counter current to the hydrogen from step (a); and (c) fractionating the gas mixture obtained in step (b) at a temperature of from 115 to 135‹ C. to produce a partial reflux.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732323777 DE2323777C2 (en) | 1973-05-11 | 1973-05-11 | Process for the continuous purification of crude monochloroacetic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1411214A true GB1411214A (en) | 1975-10-22 |
Family
ID=5880598
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2024274A Expired GB1411214A (en) | 1973-05-11 | 1974-05-08 | Process for purifying monochloroacetic acid |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS5030828A (en) |
BE (1) | BE814923A (en) |
CA (1) | CA1020170A (en) |
DE (1) | DE2323777C2 (en) |
FR (1) | FR2228759B1 (en) |
GB (1) | GB1411214A (en) |
IT (1) | IT1012211B (en) |
NL (1) | NL7406061A (en) |
Cited By (6)
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 |
US5414116A (en) * | 1992-02-19 | 1995-05-09 | Societe Elf Atochem S.A. | Catalyst for the dehalogenation of alphahalogenated carboxylic acids and its use for purifying monochloroacetic acid |
US7030270B2 (en) * | 2001-12-04 | 2006-04-18 | Akzo Nobel N.V. | Process for preparing monochloroacetic acid |
WO2013057126A1 (en) | 2011-10-20 | 2013-04-25 | Akzo Nobel Chemicals International B.V. | Process for the hydrodechlorination of a liquid feed comprising dichloroacetic acid |
US9505694B2 (en) | 2011-10-20 | 2016-11-29 | Akzo Nobel Chemicals International B.V. | Process for the purification of a liquid feed comprising MCA and DCA |
US10155714B2 (en) | 2015-03-17 | 2018-12-18 | Akzo Nobel Chemicals International B.V. | Process for the purification of monochloroacetic acid |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4844748A (en) * | 1971-05-18 | 1973-06-27 | ||
FR2582645B1 (en) * | 1985-05-31 | 1988-09-16 | Rhone Poulenc Spec Chim | PROCESS FOR THE PURIFICATION OF CHLORO-2 PROPIONIC ACID AND / OR ITS ESTERS |
JPS62296773A (en) * | 1986-06-16 | 1987-12-24 | Yokogawa Electric Corp | Sine wave converter |
FR2647032B1 (en) * | 1989-04-07 | 1993-12-10 | Atochem | PROCESS AND CATALYST FOR DEHALOGENATION OF ALPHAHALOGENIC CARBOXYLIC ACIDS |
JP4659056B2 (en) * | 2008-03-04 | 2011-03-30 | ダイセル化学工業株式会社 | Method for producing dehalogenation catalyst |
CN104649887B (en) * | 2015-02-05 | 2017-05-03 | 中国天辰工程有限公司 | Production method of chloroacetic acid and method for recovering catalysts in production process of chloroacetic acid |
-
1973
- 1973-05-11 DE DE19732323777 patent/DE2323777C2/en not_active Expired
-
1974
- 1974-04-30 CA CA198,955A patent/CA1020170A/en not_active Expired
- 1974-05-06 NL NL7406061A patent/NL7406061A/xx not_active Application Discontinuation
- 1974-05-08 GB GB2024274A patent/GB1411214A/en not_active Expired
- 1974-05-09 IT IT2249874A patent/IT1012211B/en active
- 1974-05-10 JP JP5138074A patent/JPS5030828A/ja active Pending
- 1974-05-13 FR FR7416427A patent/FR2228759B1/fr not_active Expired
- 1974-05-13 BE BE144229A patent/BE814923A/en unknown
Cited By (10)
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 |
US5414116A (en) * | 1992-02-19 | 1995-05-09 | Societe Elf Atochem S.A. | Catalyst for the dehalogenation of alphahalogenated carboxylic acids and its use for purifying monochloroacetic acid |
US5466650A (en) * | 1992-02-19 | 1995-11-14 | Societe Elf Atochem S.A. | Catalyst for the dehalogenation of alphahalogenated carboxylic acids and its use for purifying monochloroacetic acid |
US7030270B2 (en) * | 2001-12-04 | 2006-04-18 | Akzo Nobel N.V. | Process for preparing monochloroacetic acid |
WO2013057126A1 (en) | 2011-10-20 | 2013-04-25 | Akzo Nobel Chemicals International B.V. | Process for the hydrodechlorination of a liquid feed comprising dichloroacetic acid |
US9505694B2 (en) | 2011-10-20 | 2016-11-29 | Akzo Nobel Chemicals International B.V. | Process for the purification of a liquid feed comprising MCA and DCA |
US9505693B2 (en) | 2011-10-20 | 2016-11-29 | Akzo Nobel Chemicals International B.V. | Process for the hydrodechlorination of a liquid feed comprising dichloroacetic acid |
EP2748139B1 (en) * | 2011-10-20 | 2017-04-26 | Akzo Nobel Chemicals International B.V. | Process for the hydrodechlorination of a liquid feed comprising dichloroacetic acid |
US10155714B2 (en) | 2015-03-17 | 2018-12-18 | Akzo Nobel Chemicals International B.V. | Process for the purification of monochloroacetic acid |
Also Published As
Publication number | Publication date |
---|---|
FR2228759A1 (en) | 1974-12-06 |
FR2228759B1 (en) | 1978-01-27 |
BE814923A (en) | 1974-11-13 |
DE2323777C2 (en) | 1975-01-16 |
DE2323777B1 (en) | 1974-06-06 |
NL7406061A (en) | 1974-11-13 |
IT1012211B (en) | 1977-03-10 |
CA1020170A (en) | 1977-11-01 |
JPS5030828A (en) | 1975-03-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |