METHOD FOR PRODUCING METHACRYLIC ACID ESTER

• Main Authors: MIURA NAOKI, SUZUTA TETSUYA, SEKI KOHEI
• Format: Patent
• Language: English
• Published: 06.01.2016
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; APPARATUS THEREFOR; CHEMISTRY; GENERAL METHODS OF ORGANIC CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

A method for producing a methacrylic acid ester according to the present invention comprises: a dehydration reaction step of subjecting acetone to a dehydration reaction in the presence of a dehydration reaction catalyst to produce a reaction mixture; a propyne-propadiene isolation step of isolating a mixture containing propyne and propadiene as the main components from the resultant reaction mixture; a propyne purification step of separating the isolated mixture containing propyne and propadiene as the main components into a liquid, gas or gas-liquid mixture containing propyne as the main component and a liquid, gas or gas-liquid mixture containing propadiene as the main component; and a carbonylation reaction step of bringing the resultant liquid, gas or gas-liquid mixture containing propyne as the main component into contact with carbon monoxide and an alcohol having 1 to 3 carbon atoms in the presence of a catalyst containing at least one element selected from the group consisting of a Group-8 metal element, a Group-9 metal element and a Group-10 metal element, thereby producing the methacrylic acid ester. According to the method of the present invention, a methacrylic acid ester production method which is rarely constrained by locational factors and is economically and industrially advantageous can be provided.