GB1271779A - Purification of aromatic carboxylic acids - Google Patents

Purification of aromatic carboxylic acids

Info

Publication number
GB1271779A
GB1271779A GB0777/71A GB177771A GB1271779A GB 1271779 A GB1271779 A GB 1271779A GB 0777/71 A GB0777/71 A GB 0777/71A GB 177771 A GB177771 A GB 177771A GB 1271779 A GB1271779 A GB 1271779A
Authority
GB
United Kingdom
Prior art keywords
purification
carboxylic acids
aromatic carboxylic
solution
acids
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
GB0777/71A
Inventor
Enrique Roberto Witt
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.)
Celanese Corp
Original Assignee
Celanese 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 Celanese Corp filed Critical Celanese Corp
Priority to GB0777/71A priority Critical patent/GB1271779A/en
Priority to DE19712101836 priority patent/DE2101836A1/en
Publication of GB1271779A publication Critical patent/GB1271779A/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
    • C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
    • 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

Landscapes

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

Abstract

1,271,779. Purification of aromatic carboxylic acids. CELANESE CORP. 14 Jan., 1971, No. 1777/71. Heading C2C. Crude aromatic polycarboxylic acids are purified by forming a solution of the acids in a phenol containing only one phenolic hydroxy group, or in an aqueous solution of such a phenol of at least 8% by weight concentration, and recovering purified acid by crystallization from the solution. The examples describe the purification of crude terephthalic acid.
GB0777/71A 1971-01-14 1971-01-14 Purification of aromatic carboxylic acids Expired GB1271779A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0777/71A GB1271779A (en) 1971-01-14 1971-01-14 Purification of aromatic carboxylic acids
DE19712101836 DE2101836A1 (en) 1971-01-14 1971-01-15 Process for the purification of aromatic polycarboxylic acids by recrystallization

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0777/71A GB1271779A (en) 1971-01-14 1971-01-14 Purification of aromatic carboxylic acids
DE19712101836 DE2101836A1 (en) 1971-01-14 1971-01-15 Process for the purification of aromatic polycarboxylic acids by recrystallization

Publications (1)

Publication Number Publication Date
GB1271779A true GB1271779A (en) 1972-04-26

Family

ID=25760518

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0777/71A Expired GB1271779A (en) 1971-01-14 1971-01-14 Purification of aromatic carboxylic acids

Country Status (2)

Country Link
DE (1) DE2101836A1 (en)
GB (1) GB1271779A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0547231B1 (en) * 1991-07-03 1996-08-28 Shionogi & Co., Ltd. Phospholipase a2 inhibitor

Also Published As

Publication number Publication date
DE2101836A1 (en) 1972-07-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees