GB621531A - Manufacture of chlorinated aliphatic acids - Google Patents

Manufacture of chlorinated aliphatic acids

Info

Publication number
GB621531A
GB621531A GB112547A GB112547A GB621531A GB 621531 A GB621531 A GB 621531A GB 112547 A GB112547 A GB 112547A GB 112547 A GB112547 A GB 112547A GB 621531 A GB621531 A GB 621531A
Authority
GB
United Kingdom
Prior art keywords
parts
anhydride
hrs
acid
chloride
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
GB112547A
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.)
ALAN ROGER HAMMOND
JOHN ALEC JOHN
Original Assignee
ALAN ROGER HAMMOND
JOHN ALEC JOHN
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 ALAN ROGER HAMMOND, JOHN ALEC JOHN filed Critical ALAN ROGER HAMMOND
Priority to GB112547A priority Critical patent/GB621531A/en
Publication of GB621531A publication Critical patent/GB621531A/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
    • C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
    • C07C51/363—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by introduction of halogen; by substitution of halogen atoms by other halogen atoms

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)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

A chlorinated aliphatic acid is prepared by introducing chlorine into a heated aliphatic acid of not more than four carbon atoms which contains a small quantity of the corresponding anhydride or acidyl chloride, and is free from inorganic chlorination catalysts, until at least 50 per cent of the acid is chlorinated, and adding small quantities of said anhydride or acidyl chloride during the process to maintain the presence of acidyl chloride throughout the same. In preparing chloracetic acid, additional acetyl chloride or acetic anhydride may be added before absorption falls noticeably, conveniently after absorption times of 3-5 hrs. Thus, 15-20 parts of chlorine per hour may be passed into 100 parts of acetic acid containing 3-5 parts of acetic anhydride, 2-3 parts of additional anhydride being added after 4 hr. absorption periods to obtain in 12 hrs. a product which crystallizes on cooling and is equivalent to more than 80 per cent conversion. In an example, 16-17 parts of chlorine per hour are introduced into 95-100 of glacial acetic acid and 4 of acetic anhydride at 105 DEG C., over 12 hrs., 2 parts of acetic anhydride being added every 2-3 hrs.
GB112547A 1947-01-13 1947-01-13 Manufacture of chlorinated aliphatic acids Expired GB621531A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB112547A GB621531A (en) 1947-01-13 1947-01-13 Manufacture of chlorinated aliphatic acids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB112547A GB621531A (en) 1947-01-13 1947-01-13 Manufacture of chlorinated aliphatic acids

Publications (1)

Publication Number Publication Date
GB621531A true GB621531A (en) 1949-04-11

Family

ID=9716586

Family Applications (1)

Application Number Title Priority Date Filing Date
GB112547A Expired GB621531A (en) 1947-01-13 1947-01-13 Manufacture of chlorinated aliphatic acids

Country Status (1)

Country Link
GB (1) GB621531A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2688634A (en) * 1950-06-30 1954-09-07 New York Ohio Chemical Corp Manufacture of monochloroacetic acid
EP0165540A1 (en) * 1984-06-19 1985-12-27 Hoechst Aktiengesellschaft Process for preparing 2-chloropropionic acid

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2688634A (en) * 1950-06-30 1954-09-07 New York Ohio Chemical Corp Manufacture of monochloroacetic acid
EP0165540A1 (en) * 1984-06-19 1985-12-27 Hoechst Aktiengesellschaft Process for preparing 2-chloropropionic acid
AU574473B2 (en) * 1984-06-19 1988-07-07 Hoechst A.G. Preparation of 2-chloropropionic acid

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