GB783463A - Esters purification process - Google Patents

Esters purification process

Info

Publication number
GB783463A
GB783463A GB1343855A GB1343855A GB783463A GB 783463 A GB783463 A GB 783463A GB 1343855 A GB1343855 A GB 1343855A GB 1343855 A GB1343855 A GB 1343855A GB 783463 A GB783463 A GB 783463A
Authority
GB
United Kingdom
Prior art keywords
ozone
ester
alkali
washed
washing
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
GB1343855A
Inventor
Ernest Cecil Craven
George Hilton Twigg
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.)
Distillers Co Yeast Ltd
Distillers Co Ltd
Original Assignee
Distillers Co Yeast Ltd
Distillers 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 Distillers Co Yeast Ltd, Distillers Co Ltd filed Critical Distillers Co Yeast Ltd
Priority to GB1343855A priority Critical patent/GB783463A/en
Publication of GB783463A publication Critical patent/GB783463A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00Preparation of carboxylic acid esters
    • C07C67/48Separation; Purification; Stabilisation; Use of additives
    • C07C67/60Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Alkyl and oxa-alkyl diesters of dicarboxylic acids are decolourized by treating with ozone and thereafter washing the treated ester with alkali. Esters which may be treated include the diesters of dicarboxylic acids, such as phthalic acid, pimelic acid, sebacic acid, oxalic acid and tartaric acid, with saturated aliphatic alcohols such as those having four or more carbon atoms, e.g. butanols, octanols, nonanols, and decanols, and the alcohols containing ether linkages such as butoxyethyl phthalate and di-2-ethylhexyl phthalate and the diester of a mixture of C9-C7 oxo alcohols with phthalic acid. The ozone used may be employed as ozonized air or ozonized oxygen. The decolourization takes place more rapidly at elevated temperature but temperatures above 100 DEG C. are not so efficient owing to the decomposition of the ozone. After treating with ozone, the ester is washed with aqueous alkali, suitable alkalies being the hydroxides of sodium and potassium. The concentration of alkali is desirably within the range of 1 to 20 per cent by weight, 10 per cent by weight being preferred. The washing may be effected at 20-100 DEG C. The ratio of ester to aqueous alkali is desirably within the range 20:1 to 5:1 volume/volume, a ratio of 10:1 being preferred. The ester may then be washed with water at 20-100 DEG C., the ratio of ester to water being within the range 6:1 to 2:1 volume/volume, a ratio of 4:1 being preferred. The ester may then be dried by any suitable method, such as chemical drying or heating in vacuo on a water-bath followed by filtration. The treatment with ozone may be combined with further purification processes. The crude ester may be washed with aqueous alkali before treating with ozone and passed through a tower containing activated carbon after the ozone treatment. The product may be further treated with ozone to reduce the colour still further. The ester may also be treated with steam after being washed with alkali to remove traces of free alcohols. Detailed examples describe the treatment of the phthalates of a mixture of C7-C9 oxo alcohols and 2-ethyl hexanol, dioctyl sebacate, and methyl glycol phthalate. The Provisional Specification refers also to the purification of esters such as di-2-ethyl-hexyl phthalate by treatment with ozone followed by washing with water, without washing with alkali.
GB1343855A 1955-05-10 1955-05-10 Esters purification process Expired GB783463A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1343855A GB783463A (en) 1955-05-10 1955-05-10 Esters purification process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1343855A GB783463A (en) 1955-05-10 1955-05-10 Esters purification process

Publications (1)

Publication Number Publication Date
GB783463A true GB783463A (en) 1957-09-25

Family

ID=10022992

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1343855A Expired GB783463A (en) 1955-05-10 1955-05-10 Esters purification process

Country Status (1)

Country Link
GB (1) GB783463A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993007240A1 (en) * 1991-10-03 1993-04-15 Exxon Chemical Patents Inc. Process for producing fluids of enhanced thermal stability
EP2308821A2 (en) 2009-10-08 2011-04-13 OXEA GmbH Method for brightening the colour of polyol esters
US9718758B2 (en) 2013-06-07 2017-08-01 Saudi Basic Industries Corporation Method for purifying dioctyl phthalate
US9944582B2 (en) 2013-05-20 2018-04-17 Saudi Basic Industries Corporation Method for the purification of acetic acid and acrylic acid

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993007240A1 (en) * 1991-10-03 1993-04-15 Exxon Chemical Patents Inc. Process for producing fluids of enhanced thermal stability
EP2308821A2 (en) 2009-10-08 2011-04-13 OXEA GmbH Method for brightening the colour of polyol esters
CN102030637A (en) * 2009-10-08 2011-04-27 奥克塞有限公司 Method for brightening the colour of polyol esters
DE102009048774A1 (en) 2009-10-08 2011-04-28 Oxea Deutschland Gmbh Process for the color lightening of polyol esters
US8524938B2 (en) 2009-10-08 2013-09-03 Oxea Gmbh Process for lightening the color of polyol esters
CN102030637B (en) * 2009-10-08 2014-01-08 奥克塞有限公司 Method for brightening the colour of polyol esters
US9944582B2 (en) 2013-05-20 2018-04-17 Saudi Basic Industries Corporation Method for the purification of acetic acid and acrylic acid
US9718758B2 (en) 2013-06-07 2017-08-01 Saudi Basic Industries Corporation Method for purifying dioctyl phthalate

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