GB798342A - Preparation of terephthalic acid - Google Patents

Preparation of terephthalic acid

Info

Publication number
GB798342A
GB798342A GB14046/56A GB1404656A GB798342A GB 798342 A GB798342 A GB 798342A GB 14046/56 A GB14046/56 A GB 14046/56A GB 1404656 A GB1404656 A GB 1404656A GB 798342 A GB798342 A GB 798342A
Authority
GB
United Kingdom
Prior art keywords
lead
manganese
isopropyl benzene
per cent
acid
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
GB14046/56A
Inventor
William Alexander O'neill
John Skinner Macnab Robertson
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB14046/56A priority Critical patent/GB798342A/en
Publication of GB798342A publication Critical patent/GB798342A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • B01J31/04—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing carboxylic acids or their salts
    • 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
    • C07C63/04—Monocyclic monocarboxylic acids
    • 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
    • C07C63/14—Monocyclic dicarboxylic acids
    • 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
    • C07C63/14—Monocyclic dicarboxylic acids
    • C07C63/15—Monocyclic dicarboxylic acids all carboxyl groups bound to carbon atoms of the six-membered aromatic ring
    • C07C63/24—1,3 - Benzenedicarboxylic acid
    • 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
    • C07C63/14—Monocyclic dicarboxylic acids
    • C07C63/15—Monocyclic dicarboxylic acids all carboxyl groups bound to carbon atoms of the six-membered aromatic ring
    • C07C63/26—1,4 - Benzenedicarboxylic acid
    • 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
    • C07C63/307—Monocyclic tricarboxylic acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/70—Complexes comprising metals of Group VII (VIIB) as the central metal
    • B01J2531/72—Manganese

Abstract

Terephthalic acid is prepared by oxydizing p-di-isopropyl benzene with an oxygen-containing gas in a medium consisting mainly of an organic acid in which the p-di-isopropyl benzene is soluble and in the presence of a catalyst consisting of a manganese compound together with a lead compound. Saturated fatty acids containing 2-8 carbon atoms are suitable solvents, and acetic, propionic, butyric and caproic acids are preferred. Suitable lead and manganese compounds are the lead and manganese salts of organic acids, and the acetates are specified. A suitable concentration of each of the catalysts is 1 per cent, based on the hydrocarbon, but other amounts can be used and the ratio of lead to manganese may also vary. In examples: (i) air is passed through a mixture of p-di-isopropyl benzene and caproic acid containing 1 per cent manganese acetate and 1 per cent lead acetate at 180 DEG C. for 60 hours; (ii) as (1) using butyric acid and a reaction temperature of 160 DEG C.; (iii) as (ii) using a reaction temperature of 140 DEG C.; (iv) oxygen is passed under pressure into a mixture of p-di-isopropyl benzene and acetic acid containing lead and manganese acetates at 180 DEG C. Specifications 737,439 and 762,849 are referred to.
GB14046/56A 1956-05-07 1956-05-07 Preparation of terephthalic acid Expired GB798342A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB14046/56A GB798342A (en) 1956-05-07 1956-05-07 Preparation of terephthalic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14046/56A GB798342A (en) 1956-05-07 1956-05-07 Preparation of terephthalic acid

Publications (1)

Publication Number Publication Date
GB798342A true GB798342A (en) 1958-07-16

Family

ID=10034008

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14046/56A Expired GB798342A (en) 1956-05-07 1956-05-07 Preparation of terephthalic acid

Country Status (1)

Country Link
GB (1) GB798342A (en)

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