Process for preparation of methyl methacrylate using recycled methanol

• Main Author: BALDUF, TORSTEN
• Format: Patent
• Language: Chinese; English
• Published: 16.02.2009
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention relates to a process for production of methacrylic acid, to a process for production of methyl methacrylate comprising the process steps (a) providing a feed composition comprising at least one C4 feed compound selected from isobutylene and tertiary butanol; (b) providing methanol; (c) subjecting the at least one C4 feed compound and the methanol to a first catalytic reaction zone to obtain a reaction phase comprising methyl tertiary butyl ether; d) separating at least a first part of methanol from the reaction phase to obtain a first methanol phase and a reaction phase depleted in methanol; (e) subjecting at least one of the reaction phase and the reaction phase depleted in methanol to a second catalytic reaction zone to obtain a splitting phase comprising isobutylene and methanol; (f) optionally separating at least a first part of isobutylene from the second reaction phase to obtain a first isobutylene phase and a splitting phase depleted in isobutylene; (g) optionally subjecting the first iso