GB1347943A - Process for producing fibre grade terephthalic acid - Google Patents

Process for producing fibre grade terephthalic acid

Info

Publication number
GB1347943A
GB1347943A GB1347943DA GB1347943A GB 1347943 A GB1347943 A GB 1347943A GB 1347943D A GB1347943D A GB 1347943DA GB 1347943 A GB1347943 A GB 1347943A
Authority
GB
United Kingdom
Prior art keywords
terephthalic acid
vessel
reaction mixture
blades
length
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
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.)
Cosmo Oil Co Ltd
Original Assignee
Maruzen Oil Co 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 Maruzen Oil Co Ltd filed Critical Maruzen Oil Co Ltd
Publication of GB1347943A publication Critical patent/GB1347943A/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

Abstract

1347943 Production of fibre-grade terephthalic acid MARUZEN OIL CO Ltd 12 Jan 1972 1538/72 Heading C2C Terephthalic acid is prepared by oxidizing a dialkyl benzene in the liquid phase with molecular oxygen or a molecular oxygen containing gas in the presence of a C 1-8 carboxylic acid and an oxidation catalyst in a reaction vessel, the dialkyl benzene being fed to the vessel through at least three vertically spaced inlets within the vessel while the reaction mixture is stirred. The reaction mixture is preferably stirred at a stirring driving power of at least 9 horse power per 1000 gallons of reaction mixture, preferably by means of a multi-stage type stirrer, the ratio of the length of the stirring blades to the diameter of the reaction vessel being from 0À4 : 1 to 0À6 : 1, and the blades being vertically separated by an interval from 1 to 1À5 times the length of the blades.
GB1347943D 1972-01-12 1972-01-12 Process for producing fibre grade terephthalic acid Expired GB1347943A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB153872 1972-01-12

Publications (1)

Publication Number Publication Date
GB1347943A true GB1347943A (en) 1974-02-27

Family

ID=9723723

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1347943D Expired GB1347943A (en) 1972-01-12 1972-01-12 Process for producing fibre grade terephthalic acid

Country Status (1)

Country Link
GB (1) GB1347943A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998005416A1 (en) * 1996-08-05 1998-02-12 Basf Aktiengesellschaft Mixing device for liquids
US7550627B2 (en) 2005-03-08 2009-06-23 Eastman Chemical Company Processes for producing aromatic dicarboxylic acids

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998005416A1 (en) * 1996-08-05 1998-02-12 Basf Aktiengesellschaft Mixing device for liquids
US7550627B2 (en) 2005-03-08 2009-06-23 Eastman Chemical Company Processes for producing aromatic dicarboxylic acids

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee