GB799181A - Process of preparing substantially pure terephthalic and isophthalí¡í¡ - Google Patents

Process of preparing substantially pure terephthalic and isophthalí¡í¡

Info

Publication number
GB799181A
GB799181A GB2267/57A GB226757A GB799181A GB 799181 A GB799181 A GB 799181A GB 2267/57 A GB2267/57 A GB 2267/57A GB 226757 A GB226757 A GB 226757A GB 799181 A GB799181 A GB 799181A
Authority
GB
United Kingdom
Prior art keywords
acid
isophthalic
terephthalic
solvent
impurity
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
GB2267/57A
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.)
Olin Corp
Original Assignee
Olin Corp
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 Olin Corp filed Critical Olin Corp
Publication of GB799181A publication Critical patent/GB799181A/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

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

Terephthalic acid and isophthalic acid are separately recovered from mixtures containing them and other aromatic acid impurity by treating the mixture with a sufficient amount of a saturated monocarboxylic acid solvent, containing 2-4 carbon atoms, to dissolve all the isophthalic acid and aromatic acid impurity at a temperature near the boiling point of the solvent, separating the solution of isophthalic acid from the undissolved terephthalic acid and recovering the isophthalic acid by crystallization. Acetic acid, monochloracetic acid, propionic acid, butyric acid and isobutyric acid may be used as solvents. The two examples describe the oxidation of mixed xylenes in acetic acid and the treatment of the oxidation product with additional acetic acid to obtain pure terephthalic and isophthalic acids.
GB2267/57A 1956-04-11 1957-01-22 Process of preparing substantially pure terephthalic and isophthalí¡í¡ Expired GB799181A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US799181XA 1956-04-11 1956-04-11

Publications (1)

Publication Number Publication Date
GB799181A true GB799181A (en) 1958-08-06

Family

ID=22153636

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2267/57A Expired GB799181A (en) 1956-04-11 1957-01-22 Process of preparing substantially pure terephthalic and isophthalí¡í¡

Country Status (2)

Country Link
FR (1) FR1172173A (en)
GB (1) GB799181A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364256A (en) * 1964-09-09 1968-01-16 Teijin Ltd Process for preparation of high purity terephthalic acid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364256A (en) * 1964-09-09 1968-01-16 Teijin Ltd Process for preparation of high purity terephthalic acid

Also Published As

Publication number Publication date
FR1172173A (en) 1959-02-06

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