GB926878A - Concentration of 2:3:6-trichlorobenzoic acid - Google Patents

Concentration of 2:3:6-trichlorobenzoic acid

Info

Publication number
GB926878A
GB926878A GB3456858A GB3456858A GB926878A GB 926878 A GB926878 A GB 926878A GB 3456858 A GB3456858 A GB 3456858A GB 3456858 A GB3456858 A GB 3456858A GB 926878 A GB926878 A GB 926878A
Authority
GB
United Kingdom
Prior art keywords
acid
acids
water
polychlorobenzoic
immiscible solvent
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
GB3456858A
Inventor
Alan Edgar Crouch
John Frederick Harris
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.)
Fisons Pest Control Ltd
Original Assignee
Fisons Pest Control Ltd
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 Fisons Pest Control Ltd filed Critical Fisons Pest Control Ltd
Priority to GB3456858A priority Critical patent/GB926878A/en
Publication of GB926878A publication Critical patent/GB926878A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C63/00—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings
    • C07C63/68—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings containing halogen
    • C07C63/70—Monocarboxylic acids
    • 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
    • C07C51/48—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
    • 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)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

A process for the concentration of the 2,3,6-trichlorobenzoic acid content of a mixture of polychlorobenzoic acids comprises mixing an acid with an aqueous solution of salts of a mixture of polychlorobenzoic acids in the presence of a substantially water-immiscible solvent for the polychlorobenzoic acids, the amount of acid being appreciably less than the amount stoichiometrically equivalent to the total polychloro-benzoic acids, and separating the aqueous phase containing the salt of the 2,3,6-trichlorobenzoic acid. The extraction is preferably carried out using a sodium, potassium or diethanolamine salt, hydrochloric or sulphuric acid and a chlorinated hydrocarbon or a hydrocarbon, preferably tetrachloro-ethylene, as the water-immiscible solvent, but reference is made also to the use of organic acids, including trichlorobenzoic acid. The amount of acid used is preferably equivalent to the non-di-ortho-polychlorobenzoic acids and equal volumes of water and water-immiscible solvent preferably are used. The aqueous solution preferably contains 2-50% by weight of the salt and the extraction can be carried out batch-wise in one or more stages or continuously. Examples are given in which the extraction temperature ranges up to 75 DEG C.
GB3456858A 1958-10-29 1958-10-29 Concentration of 2:3:6-trichlorobenzoic acid Expired GB926878A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3456858A GB926878A (en) 1958-10-29 1958-10-29 Concentration of 2:3:6-trichlorobenzoic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3456858A GB926878A (en) 1958-10-29 1958-10-29 Concentration of 2:3:6-trichlorobenzoic acid

Publications (1)

Publication Number Publication Date
GB926878A true GB926878A (en) 1963-05-22

Family

ID=10367245

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3456858A Expired GB926878A (en) 1958-10-29 1958-10-29 Concentration of 2:3:6-trichlorobenzoic acid

Country Status (1)

Country Link
GB (1) GB926878A (en)

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