GB851671A - Improvements in or relating to the esterification of terephthalic acid in presence of metal oxidation catalyst - Google Patents

Improvements in or relating to the esterification of terephthalic acid in presence of metal oxidation catalyst

Info

Publication number
GB851671A
GB851671A GB1158959A GB1158959A GB851671A GB 851671 A GB851671 A GB 851671A GB 1158959 A GB1158959 A GB 1158959A GB 1158959 A GB1158959 A GB 1158959A GB 851671 A GB851671 A GB 851671A
Authority
GB
United Kingdom
Prior art keywords
oxidate
metal oxidation
methanol
terephthalic acid
oxidation catalyst
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
GB1158959A
Inventor
Ross Oliver Watson
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.)
Hercules Powder Co
Original Assignee
Hercules Powder 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 Hercules Powder Co filed Critical Hercules Powder Co
Priority to GB1158959A priority Critical patent/GB851671A/en
Publication of GB851671A publication Critical patent/GB851671A/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
    • C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
    • C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
    • C07C51/255—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting
    • C07C51/265—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00—Preparation of carboxylic acid esters
    • C07C67/08—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds

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

A process for esterifying an oxidate containing terephthalic acid and a metal oxidation catalyst with methanol, wherein said oxidate is preheated to a temperature within the range 200-350 DEG C before esterification, is characterized in that from 0,01 to 1,0 parts of methanol per part of oxidate, by volume, are added to the oxidate prior to the preheating thereof. Metal oxidation catalysts specified are chromium, manganese, cobalt, iron, nickel vanadium, molybdenum, tungsten, tin and cerium in the form of salts of aliphatic carboxylic acids or aromatic acids. Starting materials mentioned for the oxidation step are xylenes, toluic acid esters, p-toluic acid and p-diisopropylbenzene. The amount of methanol added is preferably 0,01 to 0,2 parts per part of oxidate by volume. Specification 758,423 is referred to.
GB1158959A 1959-04-06 1959-04-06 Improvements in or relating to the esterification of terephthalic acid in presence of metal oxidation catalyst Expired GB851671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1158959A GB851671A (en) 1959-04-06 1959-04-06 Improvements in or relating to the esterification of terephthalic acid in presence of metal oxidation catalyst

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1158959A GB851671A (en) 1959-04-06 1959-04-06 Improvements in or relating to the esterification of terephthalic acid in presence of metal oxidation catalyst

Publications (1)

Publication Number Publication Date
GB851671A true GB851671A (en) 1960-10-19

Family

ID=9989017

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1158959A Expired GB851671A (en) 1959-04-06 1959-04-06 Improvements in or relating to the esterification of terephthalic acid in presence of metal oxidation catalyst

Country Status (1)

Country Link
GB (1) GB851671A (en)

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