GB584607A - Process for the preparation of methacrylic acid and its esters - Google Patents

Process for the preparation of methacrylic acid and its esters

Info

Publication number
GB584607A
GB584607A GB209744A GB209744A GB584607A GB 584607 A GB584607 A GB 584607A GB 209744 A GB209744 A GB 209744A GB 209744 A GB209744 A GB 209744A GB 584607 A GB584607 A GB 584607A
Authority
GB
United Kingdom
Prior art keywords
acid
methacrylic acid
esters
preparation
alkoxyisobutyric
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
GB209744A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB209744A priority Critical patent/GB584607A/en
Publication of GB584607A publication Critical patent/GB584607A/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
    • C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
    • C07C51/377—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00—Preparation of carboxylic acid esters
    • C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
    • C07C67/317—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups
    • C07C67/327—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups by elimination of functional groups containing oxygen only in singly bound form

Abstract

By heating with dehydrating agents, a -alkoxyisobutyric acid and its alkyl esters are converted into methacrylic acid or its ester with removal of the alcohol. As starting material, a solution of the a -alkoxyisobutyric acid prepared as described in Specification 578,082 may be used. In examples, methyl-a -methoxyisobutyrate is treated with phosphorus pentoxide and with oxalic acid to give methyl methacrylate. Inhibitors such as pyrogallol and tannic acid may be used. Activated alumina is specified as a dehydrating agent. Specifications 539,163 and 15735/39 (as open to inspection under Sect. 91) also are referred to.
GB209744A 1943-04-15 1943-04-15 Process for the preparation of methacrylic acid and its esters Expired GB584607A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB209744A GB584607A (en) 1943-04-15 1943-04-15 Process for the preparation of methacrylic acid and its esters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB209744A GB584607A (en) 1943-04-15 1943-04-15 Process for the preparation of methacrylic acid and its esters

Publications (1)

Publication Number Publication Date
GB584607A true GB584607A (en) 1947-01-20

Family

ID=9733535

Family Applications (1)

Application Number Title Priority Date Filing Date
GB209744A Expired GB584607A (en) 1943-04-15 1943-04-15 Process for the preparation of methacrylic acid and its esters

Country Status (1)

Country Link
GB (1) GB584607A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1118193B (en) * 1957-09-17 1961-11-30 Knapsack Ag Process for the production of methacrylic acid esters by catalytic elimination of water from ª ‡ -oxyisobutyric acid esters
DE1124481B (en) * 1958-06-03 1962-03-01 Wacker Chemie Gmbh Process for the preparation of acrylic acid and ª ‡ -alkyl acrylic acid esters by splitting off alcohol from ª ‡ or ª ‰ -alkoxymonocarboxylic acid esters
DE1124482B (en) * 1958-06-25 1962-03-01 Wacker Chemie Gmbh Process for the preparation of acrylic acid esters and ª ‡ -alkylacrylic acid esters by splitting off alcohol from ª ‰ -alkoxymonocarboxylic acid esters
DE1124483B (en) * 1958-06-03 1962-03-01 Wacker Chemie Gmbh Process for the preparation of acrylic acid and ª ‡ -alkyl acrylic acid esters by splitting off alcohol from ª ‡ - or ª ‰ -alkoxymonocarboxylic acid esters
DE1125912B (en) * 1958-06-03 1962-03-22 Wacker Chemie Gmbh Process for the preparation of acrylic acid esters and ª ‡ -alkylacrylic acid esters by splitting off alcohol from ª ‰ -alkoxymonocarboxylic acid esters
DE1126378B (en) * 1958-07-05 1962-03-29 Wacker Chemie Gmbh Process for the production of acrylic acid and methacrylic acid esters
DE1211153B (en) * 1957-10-29 1966-02-24 Escambia Chem Corp Process for the preparation of methacrylic acid and / or their esters by reacting the steams of alpha-oxyisobutyric acid or their esters
DE1279015B (en) * 1961-12-29 1968-10-03 Wacker Chemie Gmbh Process for the preparation of acrylic acid esters by splitting ª‰-alkoxycarboxylic acid esters
EP0379691A1 (en) * 1989-01-26 1990-08-01 Mitsubishi Gas Chemical Company, Inc. Process for preparing unsaturated carboxylic acid or ester thereof

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1118193B (en) * 1957-09-17 1961-11-30 Knapsack Ag Process for the production of methacrylic acid esters by catalytic elimination of water from ª ‡ -oxyisobutyric acid esters
DE1211153B (en) * 1957-10-29 1966-02-24 Escambia Chem Corp Process for the preparation of methacrylic acid and / or their esters by reacting the steams of alpha-oxyisobutyric acid or their esters
DE1124481B (en) * 1958-06-03 1962-03-01 Wacker Chemie Gmbh Process for the preparation of acrylic acid and ª ‡ -alkyl acrylic acid esters by splitting off alcohol from ª ‡ or ª ‰ -alkoxymonocarboxylic acid esters
DE1124483B (en) * 1958-06-03 1962-03-01 Wacker Chemie Gmbh Process for the preparation of acrylic acid and ª ‡ -alkyl acrylic acid esters by splitting off alcohol from ª ‡ - or ª ‰ -alkoxymonocarboxylic acid esters
DE1125912B (en) * 1958-06-03 1962-03-22 Wacker Chemie Gmbh Process for the preparation of acrylic acid esters and ª ‡ -alkylacrylic acid esters by splitting off alcohol from ª ‰ -alkoxymonocarboxylic acid esters
DE1124482B (en) * 1958-06-25 1962-03-01 Wacker Chemie Gmbh Process for the preparation of acrylic acid esters and ª ‡ -alkylacrylic acid esters by splitting off alcohol from ª ‰ -alkoxymonocarboxylic acid esters
DE1126378B (en) * 1958-07-05 1962-03-29 Wacker Chemie Gmbh Process for the production of acrylic acid and methacrylic acid esters
DE1279015B (en) * 1961-12-29 1968-10-03 Wacker Chemie Gmbh Process for the preparation of acrylic acid esters by splitting ª‰-alkoxycarboxylic acid esters
EP0379691A1 (en) * 1989-01-26 1990-08-01 Mitsubishi Gas Chemical Company, Inc. Process for preparing unsaturated carboxylic acid or ester thereof
US5250729A (en) * 1989-01-26 1993-10-05 Mitsubishi Gas Chemical Company, Inc. Process for preparing unsaturated carboxylic acid or ester thereof
EP0379691B1 (en) * 1989-01-26 1994-03-09 Mitsubishi Gas Chemical Company, Inc. Process for preparing unsaturated carboxylic acid or ester thereof

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