GB414570A - Manufacture of aromatic dicarboxylic acid chlorides - Google Patents

Manufacture of aromatic dicarboxylic acid chlorides

Info

Publication number
GB414570A
GB414570A GB3558033A GB3558033A GB414570A GB 414570 A GB414570 A GB 414570A GB 3558033 A GB3558033 A GB 3558033A GB 3558033 A GB3558033 A GB 3558033A GB 414570 A GB414570 A GB 414570A
Authority
GB
United Kingdom
Prior art keywords
chloride
zinc
benzotrichloride
yield
phthalyl
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
GB3558033A
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.)
Monsanto Chemicals Ltd
Monsanto Chemical Co
Original Assignee
Monsanto Chemicals Ltd
Monsanto Chemical Co
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 Monsanto Chemicals Ltd, Monsanto Chemical Co filed Critical Monsanto Chemicals Ltd
Priority to GB3558033A priority Critical patent/GB414570A/en
Publication of GB414570A publication Critical patent/GB414570A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/58Preparation of carboxylic acid halides
    • C07C51/60Preparation of carboxylic acid halides by conversion of carboxylic acids or their anhydrides or esters, lactones, salts into halides with the same carboxylic acid part

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Phthalyl chloride and its homologues and nuclear substitution products are made by treating phthalic anhydride or a homologue or nuclear substitution product thereof with benzotrichloride, benzal chloride, or their homologues or nuclear substitution products. The reaction may be effected in the presence of a catalyst comprising an inorganic polyvalent metal salt forming an aqueous solution which is acid to litmus, e.g. chloride of zinc, aluminium, copper, chromium or iron; the catalyst may be formed in situ, e.g. from zinc oxide or zinc dust, aluminium oxide or hydroxide, or iron hydroxide. In the examples, (1) phthalic anhydride and benzotrichloride are heated to 200 DEG C. with a little zinc chloride to yield phthalyl chloride and benzoyl chloride; (2) the same reaction is effected at 110--120 DEG C. in the presence of a larger proportion of zinc chloride. Reference is made to the production of chloro- and tetrachloro-phthalyl chloride and to the use as chlorinating agents of chlorobenzotrichloride and chlorinated xylenes in which at least two atoms of a methyl group are replaced by chlorine. Reference is made also to the reactions, described in the literature, of benzotrichloride (1) with acetic acid, to yield benzoic acid and acetyl chloride, and (2) with acetic anhydride to yield acetyl chloride and benzoyl chloride.
GB3558033A 1933-12-18 1933-12-18 Manufacture of aromatic dicarboxylic acid chlorides Expired GB414570A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3558033A GB414570A (en) 1933-12-18 1933-12-18 Manufacture of aromatic dicarboxylic acid chlorides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3558033A GB414570A (en) 1933-12-18 1933-12-18 Manufacture of aromatic dicarboxylic acid chlorides

Publications (1)

Publication Number Publication Date
GB414570A true GB414570A (en) 1934-08-09

Family

ID=10379313

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3558033A Expired GB414570A (en) 1933-12-18 1933-12-18 Manufacture of aromatic dicarboxylic acid chlorides

Country Status (1)

Country Link
GB (1) GB414570A (en)

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