GB1175079A – Process for Treating Solutions Obtained as By-Products During the Manufacture of Phthalic Anhydride
– Google Patents
GB1175079A – Process for Treating Solutions Obtained as By-Products During the Manufacture of Phthalic Anhydride
– Google Patents
Process for Treating Solutions Obtained as By-Products During the Manufacture of Phthalic Anhydride
Info
Publication number
GB1175079A
GB1175079A
GB26941/67A
GB2694167A
GB1175079A
GB 1175079 A
GB1175079 A
GB 1175079A
GB 26941/67 A
GB26941/67 A
GB 26941/67A
GB 2694167 A
GB2694167 A
GB 2694167A
GB 1175079 A
GB1175079 A
GB 1175079A
Authority
GB
United Kingdom
Prior art keywords
citraconic
solution
acid
maleic
anhydride
Prior art date
1966-06-13
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
GB26941/67A
Inventor
Paul Juston
Pierre Guillermard
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.)
Produits Chimiques Pechiney Saint Gobain
Original Assignee
Produits Chimiques Pechiney Saint Gobain
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.)
1966-06-13
Filing date
1967-06-12
Publication date
1969-12-23
1967-06-12
Application filed by Produits Chimiques Pechiney Saint Gobain
filed
Critical
Produits Chimiques Pechiney Saint Gobain
1969-12-23
Publication of GB1175079A
publication
Critical
patent/GB1175079A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
C—CHEMISTRY; METALLURGY
C07—ORGANIC CHEMISTRY
C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
C07C51/42—Separation; Purification; Stabilisation; Use of additives
C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
C—CHEMISTRY; METALLURGY
C07—ORGANIC CHEMISTRY
C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
C07C51/353—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by isomerisation; by change of size of the carbon skeleton
C—CHEMISTRY; METALLURGY
C07—ORGANIC CHEMISTRY
C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
C07C51/42—Separation; Purification; Stabilisation; Use of additives
C07C51/487—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification
Abstract
1,175,079. Citraconic, maleic acids and anhydrides. PRODUITS CHIMIQUES PECHINEY-SAINT-GOBAIN. 12 June, 1967 [13 June, 1966], No. 26941/67. Heading C2C. Citraconic anhydride is obtained by separating at least part of the maleic acid present in an aqueous solution obtained as by-product during the manufacture of phthalic anhydride and heating the resulting solution with a solvent having a boiling point of not more than 140 C., whereby the solution is dehydrated and the citraconic acid present is converted to citraconic anhydride which dissolves in said solvent, separating the residue from the resulting solution and evaporating the solvent. The preliminary separation of the maleic acid may be effected by concentrating the initial aqueous solution whereby maleic acid crystallizes out and is separated from the solution, by converting it to fumaric acid and separating the fumaric acid from the aqueous solution, or by partially neutralizing the initial aqueous solution so that the maleic acid present is converted to an acid metal maleate, which is separated off, and then acidifying this solution. The citraconic anhydride and maleic acid thus obtained may be converted, into citraconic acid and maleic anhydride respectively.
GB26941/67A
1966-06-13
1967-06-12
Process for Treating Solutions Obtained as By-Products During the Manufacture of Phthalic Anhydride
Expired
GB1175079A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
FR65208A
FR1489787A
(en)
1966-06-13
1966-06-13
Process for treating waste water from the manufacture of phthalic anhydride
Publications (1)
Publication Number
Publication Date
GB1175079A
true
GB1175079A
(en)
1969-12-23
Family
ID=8610777
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB26941/67A
Expired
GB1175079A
(en)
1966-06-13
1967-06-12
Process for Treating Solutions Obtained as By-Products During the Manufacture of Phthalic Anhydride
Country Status (7)
Country
Link
US
(1)
US3528997A
(en)
BE
(1)
BE699770A
(en)
DE
(1)
DE1618793B2
(en)
ES
(1)
ES341720A1
(en)
FR
(1)
FR1489787A
(en)
GB
(1)
GB1175079A
(en)
NL
(1)
NL6708129A
(en)
Families Citing this family (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3865696A
(en)
*
1969-07-16
1975-02-11
Veba Chemie Ag
Recovery of citraconic acid anhydride by isomerization and vacuum distillation
DE2826346C2
(en)
*
1978-06-16
1985-02-07
Davy McKee AG, 6000 Frankfurt
Process for the suction of gases and vapors from vacuum distillation columns
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2942006A
(en)
*
1957-07-01
1960-06-21
Scient Design Co
Preparation of maleic anhydride by azeotropic distillation of maleic acid
US3007942A
(en)
*
1957-11-19
1961-11-07
Standard Oil Co
Resolution of trimesic and trimellitic acid
US3098095A
(en)
*
1959-08-10
1963-07-16
Standared Oil Company
Process for resolving aromatic polycarboxylic acids capable of forming intramolecular anhydrides
FR1453334A
(en)
*
1965-06-30
1966-06-03
Pechiney Saint Gobain
Citraconic acid extraction process
1966
1966-06-13
FR
FR65208A
patent/FR1489787A/en
not_active
Expired
1967
1967-06-12
GB
GB26941/67A
patent/GB1175079A/en
not_active
Expired
1967-06-12
BE
BE699770D
patent/BE699770A/xx
unknown
1967-06-12
US
US645496A
patent/US3528997A/en
not_active
Expired – Lifetime
1967-06-12
NL
NL6708129A
patent/NL6708129A/xx
unknown
1967-06-13
ES
ES341720A
patent/ES341720A1/en
not_active
Expired
1967-06-13
DE
DE1967P0042354
patent/DE1618793B2/en
active
Granted
Also Published As
Publication number
Publication date
NL6708129A
(en)
1967-12-14
US3528997A
(en)
1970-09-15
BE699770A
(en)
1967-12-12
FR1489787A
(en)
1967-07-28
DE1618793A1
(en)
1971-02-11
ES341720A1
(en)
1968-07-01
DE1618793B2
(en)
1976-06-16
Similar Documents
Publication
Publication Date
Title
GB1175079A
(en)
1969-12-23
Process for Treating Solutions Obtained as By-Products During the Manufacture of Phthalic Anhydride
US2491065A
(en)
1949-12-13
Process for producing ascorbic acid from 2-keto-levo-gulonic acid or its derivatives
GB1109543A
(en)
1968-04-10
A method of processing the reaction mixture from the oxidation of cyclohexane
GB1023176A
(en)
1966-03-23
Process for the preparation of acrylic acid esters
US2885436A
(en)
1959-05-05
Process for the purification of lactic acid
US3128284A
(en)
1964-04-07
Production of phthalide
FR2064583A5
(en)
1971-07-23
Methylmethacrylate from residues
GB1003650A
(en)
1965-09-08
Process for producing purified terephthalic acid
GB1456101A
(en)
1976-11-17
Process for dehydrating aqueous solutions of maleic acid to maleic anhydride
GB1441380A
(en)
1976-06-30
Process for the production of maleic anhydride
ES431220A1
(en)
1976-10-16
Process for separation of monocarboxylic acids from a mixture of monocarboxylic, hydroxycarboxylic and dicarboxylic acids
SU141149A1
(en)
1960-11-30
The method of joint production of phthalic acids and chloroform
GB1216926A
(en)
1970-12-23
Process for purifying high boiling esters
US3632832A
(en)
1972-01-04
Oxidation of 5-carboxyphthalide to trimellitic acid
GB1227887A
(en)
1971-04-07
SU65815A1
(en)
1945-11-30
The method of producing trioxyglutaric acid
GB595018A
(en)
1947-11-25
Improvements in or relating to the preparation of derivatives of p-aminobenzenesulphonthiourea
GB1274619A
(en)
1972-05-17
Process for the preparation of straight-chain fatty acids
GB1287511A
(en)
1972-08-31
Method for the production of tetrabromophthalic esters
JPS51138603A
(en)
1976-11-30
Process for preparing n-ac etyle-dl-amino acids
GB914734A
(en)
1963-01-02
New cyclopentano-naphthalene derivatives and their formation
GB674710A
(en)
1952-06-25
A method of preparing aliphatic acyl hydroxypolycarboxylic acid anhydrides
GB494669A
(en)
1938-10-25
Process for the manufacture of paperboard from straw with the simultaneous production of furfuraldehyde
GB855880A
(en)
1960-12-07
Production of alpha hydroxyisobutyric acid
JPS5562186A
(en)
1980-05-10
Preparation of 1,2,3,4-butane tetracarboxylic acid anhidride
Legal Events
Date
Code
Title
Description
1970-05-06
PS
Patent sealed [section 19, patents act 1949]
1978-01-12
PLNP
Patent lapsed through nonpayment of renewal fees
