FR2348906A1 - Methacrylic acid, ester or nitrile prepn. - from propionic acid, esters or nitrile by alumina-catalysed reaction with methylal - Google Patents

Methacrylic acid, ester or nitrile prepn. - from propionic acid, esters or nitrile by alumina-catalysed reaction with methylal

Info

Publication number
FR2348906A1
FR2348906A1 FR7611548A FR7611548A FR2348906A1 FR 2348906 A1 FR2348906 A1 FR 2348906A1 FR 7611548 A FR7611548 A FR 7611548A FR 7611548 A FR7611548 A FR 7611548A FR 2348906 A1 FR2348906 A1 FR 2348906A1
Authority
FR
France
Prior art keywords
nitrile
degrees
esters
methylal
prepn
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.)
Granted
Application number
FR7611548A
Other languages
French (fr)
Other versions
FR2348906B1 (en
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.)
Roehm GmbH Darmstadt
Original Assignee
Roehm GmbH Darmstadt
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 Roehm GmbH Darmstadt filed Critical Roehm GmbH Darmstadt
Priority to FR7611548A priority Critical patent/FR2348906A1/en
Publication of FR2348906A1 publication Critical patent/FR2348906A1/en
Application granted granted Critical
Publication of FR2348906B1 publication Critical patent/FR2348906B1/fr
Granted legal-status Critical Current

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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
    • C07C51/353—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

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)

Abstract

Methacrylic acid or its esters or nitrile are prepd. by reacting prepionic acid or its esters or nitrile with methylal, esp. at 300-400 degrees C, in the presence of a catalyst consisting of or contg. Al2O3 which was preheated to >600 degrees C. Propionic acid conversion decreases whereas selectivity increases with higher pretreatment temp. of Al2O3, e.g., at 600 degrees C and 1100 degrees C pretreatment temps., coversion is 47.3% and 12.95% respectively and selectivity is 12.3% and 44.8% respectively. A reaction temp. increase from 400 degrees C to 450 degrees C doubles conversion but reduces selectivity by 1/3.
FR7611548A 1976-04-20 1976-04-20 Methacrylic acid, ester or nitrile prepn. - from propionic acid, esters or nitrile by alumina-catalysed reaction with methylal Granted FR2348906A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7611548A FR2348906A1 (en) 1976-04-20 1976-04-20 Methacrylic acid, ester or nitrile prepn. - from propionic acid, esters or nitrile by alumina-catalysed reaction with methylal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7611548A FR2348906A1 (en) 1976-04-20 1976-04-20 Methacrylic acid, ester or nitrile prepn. - from propionic acid, esters or nitrile by alumina-catalysed reaction with methylal

Publications (2)

Publication Number Publication Date
FR2348906A1 true FR2348906A1 (en) 1977-11-18
FR2348906B1 FR2348906B1 (en) 1979-05-11

Family

ID=9172030

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7611548A Granted FR2348906A1 (en) 1976-04-20 1976-04-20 Methacrylic acid, ester or nitrile prepn. - from propionic acid, esters or nitrile by alumina-catalysed reaction with methylal

Country Status (1)

Country Link
FR (1) FR2348906A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2400499A2 (en) * 1977-07-25 1979-03-16 Roehm Gmbh PROCESS FOR PREPARING METHACRYLIC ACID, ITS ESTERS AND ITS NITRILE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2400499A2 (en) * 1977-07-25 1979-03-16 Roehm Gmbh PROCESS FOR PREPARING METHACRYLIC ACID, ITS ESTERS AND ITS NITRILE

Also Published As

Publication number Publication date
FR2348906B1 (en) 1979-05-11

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