GB1411214A - Process for purifying monochloroacetic acid - Google Patents

Process for purifying monochloroacetic acid

Info

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
Application number
GB2024274A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
Original Assignee
Hoechst AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of GB1411214A publication Critical patent/GB1411214A/en
Expired legal-status Critical Current

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.
GB2024274A 1973-05-11 1974-05-08 Process for purifying monochloroacetic acid Expired GB1411214A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (10)

* Cited by examiner, † Cited by third party
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
FR2228759B1 (en) 1978-01-27
CA1020170A (en) 1977-11-01
DE2323777B1 (en) 1974-06-06
BE814923A (en) 1974-11-13
JPS5030828A (en) 1975-03-27
DE2323777C2 (en) 1975-01-16
NL7406061A (en) 1974-11-13
FR2228759A1 (en) 1974-12-06
IT1012211B (en) 1977-03-10

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee