GB749186A - Process for preparing ú­-di-isopropyl benzene and terephthalic acid - Google Patents

Process for preparing ú­-di-isopropyl benzene and terephthalic acid

Info

Publication number
GB749186A
GB749186A GB634453A GB634453A GB749186A GB 749186 A GB749186 A GB 749186A GB 634453 A GB634453 A GB 634453A GB 634453 A GB634453 A GB 634453A GB 749186 A GB749186 A GB 749186A
Authority
GB
United Kingdom
Prior art keywords
benzene
acid
isopropyl
boron fluoride
alkylation
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
GB634453A
Inventor
Nicolaas Max
Ype Schaafsma
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.)
Bataafsche Petroleum Maatschappij NV
Original Assignee
Bataafsche Petroleum Maatschappij NV
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 Bataafsche Petroleum Maatschappij NV filed Critical Bataafsche Petroleum Maatschappij NV
Priority to GB634453A priority Critical patent/GB749186A/en
Publication of GB749186A publication Critical patent/GB749186A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C15/00—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts
    • C07C15/02—Monocyclic hydrocarbons
    • 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

Abstract

A continuous process for the preparation of p-di-isopropylbenzene comprises alkylating benzene or cumene or a mixture thereof to form a product containing o-, m- and p-di-isopropyl benzenes, subjecting the product to a distillation to separate p-di-isopropyl benzene, a fraction containing o- and m-di-isopropyl benzenes and higher boiling fractions, de-alkylating the mixture of o- and m-isomers to yield benzene and cumene which is recycled to the alkylation stage. The p. di-isopropyl benzene may be oxidized either by 10-40 per cent nitric acid, or by catalytic air oxidation in the liquid phase, e.g. as described in Specification 737,439 to form terephthalic acid. As alkylation catalyst sulphuric acid is preferred, although aluminium chloride, boron fluoride, boron fluoride with phosphoric acid, hydrofluoric acid, aluminium silicates, phosphoric acid on kieselguhr and titanium tetrachloride may also be used. The de-alkylation is preferably carried out in the presence of a solid catalyst such as mixtures of Al2O3 and SiO2, small quantities of ZrO2 may also be present. Al2O3 containing a small amount of HF, aluminium chloride, and boron fluoride may also be used. The temperature may be between 150 DEG and 600 DEG C.
GB634453A 1953-03-06 1953-03-06 Process for preparing ú­-di-isopropyl benzene and terephthalic acid Expired GB749186A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB634453A GB749186A (en) 1953-03-06 1953-03-06 Process for preparing ú­-di-isopropyl benzene and terephthalic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB634453A GB749186A (en) 1953-03-06 1953-03-06 Process for preparing ú­-di-isopropyl benzene and terephthalic acid

Publications (1)

Publication Number Publication Date
GB749186A true GB749186A (en) 1956-05-23

Family

ID=9812775

Family Applications (1)

Application Number Title Priority Date Filing Date
GB634453A Expired GB749186A (en) 1953-03-06 1953-03-06 Process for preparing ú­-di-isopropyl benzene and terephthalic acid

Country Status (1)

Country Link
GB (1) GB749186A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2848514A (en) * 1954-07-30 1958-08-19 Shell Dev Process for producing diisopropyl benzenes
US2881227A (en) * 1954-10-22 1959-04-07 Shell Dev Production of dhsopropyl benzenes
DE1079027B (en) * 1956-07-23 1960-04-07 Bataafsche Petroleum Process for the production of terephthalic acid and / or isophthalic acid
DE1226552B (en) * 1956-07-23 1966-10-13 Universal Oil Prod Co Process for the preparation of a selected isomer of a polyalkylated aromatic hydrocarbon

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2848514A (en) * 1954-07-30 1958-08-19 Shell Dev Process for producing diisopropyl benzenes
US2881227A (en) * 1954-10-22 1959-04-07 Shell Dev Production of dhsopropyl benzenes
DE1079027B (en) * 1956-07-23 1960-04-07 Bataafsche Petroleum Process for the production of terephthalic acid and / or isophthalic acid
DE1226552B (en) * 1956-07-23 1966-10-13 Universal Oil Prod Co Process for the preparation of a selected isomer of a polyalkylated aromatic hydrocarbon

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