GB1036344A - Improvements in or relating to production of methylene dicarboxylates - Google Patents
Improvements in or relating to production of methylene dicarboxylatesInfo
- Publication number
- GB1036344A GB1036344A GB972064A GB972064A GB1036344A GB 1036344 A GB1036344 A GB 1036344A GB 972064 A GB972064 A GB 972064A GB 972064 A GB972064 A GB 972064A GB 1036344 A GB1036344 A GB 1036344A
- Authority
- GB
- United Kingdom
- Prior art keywords
- methylene
- dicarboxylate
- anhydride
- dicarboxylates
- mixture
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
- C08G2/06—Catalysts
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
- C08G2/08—Polymerisation of formaldehyde
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
- C08G2/18—Copolymerisation of aldehydes or ketones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
- C08G2/30—Chemical modification by after-treatment
- C08G2/32—Chemical modification by after-treatment by esterification
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Methylene dicarboxylates of the formula R.CO.OCH2O.CO.R1, wherein R and R1 represent a C1- 17 alkyl group, or a mono- or bi-nuclear aryl group, or a cycloalkyl group, are made by a process comprising (i) heating an a -polyoxy-methylene with a stoichiometric equivalent of a monocarboxylic acid anhydride at 140-200 DEG C. in the presence of an acidic esterification catalyst, which is less volatile than the methylene dicarboxylate, to form a reaction mixture comprising a methylene dicarboxylate, a monocarboxylic acid and the anhydride thereof and the catalyst, (ii) distilling the mixture to obtain a distillate containing the dicarboxylate, the acid and the anhydride, (ii) fractionally distilling said mixture to obtain a product containing at 98% by weight of the dicarboxylate. Specified catalysts are H2SO4, H3PO4 and ZnCl2 which may be used in, e.g., amounts of 0.5-3.0% by weight of polyoxymethylene. The distillations may be effected at sub- or atmospheric pressures, preferably at 50-200 mm. absolute. Examples relate to methylene diacetate
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US26793663A | 1963-03-26 | 1963-03-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1036344A true GB1036344A (en) | 1966-07-20 |
Family
ID=23020750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB972064A Expired GB1036344A (en) | 1963-03-26 | 1964-03-06 | Improvements in or relating to production of methylene dicarboxylates |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1468027A1 (en) |
GB (1) | GB1036344A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3931412A (en) | 1972-06-28 | 1976-01-06 | Chevron Research Company | Fungus and bacteria control with di-carboxylic acid esters |
US4012526A (en) | 1974-05-09 | 1977-03-15 | Chevron Research Company | Oxymethylene di-carboxylic acid esters as anti-fungal agents and animal growth promoters |
-
1964
- 1964-03-06 GB GB972064A patent/GB1036344A/en not_active Expired
- 1964-03-24 DE DE19641468027 patent/DE1468027A1/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3931412A (en) | 1972-06-28 | 1976-01-06 | Chevron Research Company | Fungus and bacteria control with di-carboxylic acid esters |
US4012526A (en) | 1974-05-09 | 1977-03-15 | Chevron Research Company | Oxymethylene di-carboxylic acid esters as anti-fungal agents and animal growth promoters |
Also Published As
Publication number | Publication date |
---|---|
DE1468027A1 (en) | 1968-12-19 |
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