GB768551A - Improvements in recovery of polycarboxylic acid anhydrides - Google Patents

Improvements in recovery of polycarboxylic acid anhydrides

Info

Publication number
GB768551A
GB768551A GB2769253A GB2769253A GB768551A GB 768551 A GB768551 A GB 768551A GB 2769253 A GB2769253 A GB 2769253A GB 2769253 A GB2769253 A GB 2769253A GB 768551 A GB768551 A GB 768551A
Authority
GB
United Kingdom
Prior art keywords
anhydride
stripping
range
anhydrides
recovery
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
GB2769253A
Inventor
Ralph Landau
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.)
Chempatents Inc
Original Assignee
Chempatents Inc
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 Chempatents Inc filed Critical Chempatents Inc
Priority to GB2769253A priority Critical patent/GB768551A/en
Publication of GB768551A publication Critical patent/GB768551A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/54Preparation of carboxylic acid anhydrides
    • C07C51/573Separation; Purification; Stabilisation; Use of additives
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42Separation; Purification; Stabilisation; Use of additives
    • C07C51/48Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment

Abstract

Maleic anhydride or phthalic anhydride are recovered from a dilute or gaseous mixture containing either one or both of the anhydrides by scrubbing only the maleic anhydride or only the phthalic anhydride vapour from the gaseous mixture with dibutyl phthalate as scrubbing liquor, stripping the absorbed anhydride from the resulting solution comprising only one of the said anhydrides at a temperature in the range of 75 DEG to 250 DEG C. and an absolute pressure in the range of 10 to 150 mm. mercury and then subjecting the partially stripped solution to further stripping under more severe conditions at a temperature of about 75 DEG C. to 250 DEG C. and an absolute pressure in the range of about 12 to 60 mm. mercury, recycling the anhydride product from the second stripping operation to the first stripping operation, and recycling the stripped solvent from the second stripping operation to the anhydride absorption step. The specific procedures referred to and the examples given are identical with those described in Specification 763,339.
GB2769253A 1953-10-08 1953-10-08 Improvements in recovery of polycarboxylic acid anhydrides Expired GB768551A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2769253A GB768551A (en) 1953-10-08 1953-10-08 Improvements in recovery of polycarboxylic acid anhydrides

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1089012D FR1089012A (en) 1953-10-08 1953-10-07 Process for recovering polycarboxylic acid anhydrides from dilute gas mixtures
GB2769253A GB768551A (en) 1953-10-08 1953-10-08 Improvements in recovery of polycarboxylic acid anhydrides

Publications (1)

Publication Number Publication Date
GB768551A true GB768551A (en) 1957-02-20

Family

ID=10263752

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2769253A Expired GB768551A (en) 1953-10-08 1953-10-08 Improvements in recovery of polycarboxylic acid anhydrides

Country Status (2)

Country Link
FR (1) FR1089012A (en)
GB (1) GB768551A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6077964A (en) * 1996-05-15 2000-06-20 Basf Aktiengesellschaft Process for preparing gamma-butyrolactone, butane-1, 4-diol and tetrahydrofuran
US6204395B1 (en) 1997-11-14 2001-03-20 Basf Aktiengesellschaft Process for the preparation of butane-1,4-diol, γ-butyrolactone and tetrahydrofuran
US6239292B1 (en) 1997-11-13 2001-05-29 Basf Aktiengesellschaft Process for preparing gamma-butyrolactone, butane-1,4-diol and tetrahydrofuran
US6274743B1 (en) 1998-03-23 2001-08-14 Basf Aktiengesellschaft Process for the preparation of butanediol, butyrolactone and tetrahydrofuran
US7816554B2 (en) 2003-10-31 2010-10-19 Davy Process Technology Limited Process for the production of esters of mono-, di- or polycarboxylic acids
WO2012081043A1 (en) 2010-12-13 2012-06-21 Conser Spa An improved process for recovery of maleic anhydride by using organic solvent

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1131660B (en) * 1955-04-20 1962-06-20 Montedison Spa Process for the production of crystalline maleic anhydride from a gas mixture

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6077964A (en) * 1996-05-15 2000-06-20 Basf Aktiengesellschaft Process for preparing gamma-butyrolactone, butane-1, 4-diol and tetrahydrofuran
US6239292B1 (en) 1997-11-13 2001-05-29 Basf Aktiengesellschaft Process for preparing gamma-butyrolactone, butane-1,4-diol and tetrahydrofuran
US6204395B1 (en) 1997-11-14 2001-03-20 Basf Aktiengesellschaft Process for the preparation of butane-1,4-diol, γ-butyrolactone and tetrahydrofuran
US6274743B1 (en) 1998-03-23 2001-08-14 Basf Aktiengesellschaft Process for the preparation of butanediol, butyrolactone and tetrahydrofuran
US7816554B2 (en) 2003-10-31 2010-10-19 Davy Process Technology Limited Process for the production of esters of mono-, di- or polycarboxylic acids
WO2012081043A1 (en) 2010-12-13 2012-06-21 Conser Spa An improved process for recovery of maleic anhydride by using organic solvent
US8901321B2 (en) 2010-12-13 2014-12-02 Conser Spa Process for recovery of maleic anhydride by using organic solvent

Also Published As

Publication number Publication date
FR1089012A (en) 1955-03-14

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