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US 11,919,846 B2Granted
Continuous process for preparing methacrolein
AssigneeRohm Co., Ltd.
InventorsAlexander Lygin, Steffen Krill, Matthias Grömping, Torsten Balduf, Rudolf Burghardt
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Abstract
Methacrolein is prepared in a continuous process by a Mannich condensation reaction of formaldehyde with propanal. A methacrolein polymerization inhibitor is introduced during the production process and a part thereof is recycled back into the reactor where the Mannich condensation reaction is carried out.
Claims17
A continuous process for preparing methacrolein by a Mannich condensation reaction of formaldehyde with propanal, said comprising:
- introducing a methacrolein polymerization inhibitor into a production process system, and
- recycling a part of said methacrolein polymerization inhibitor back into a reactor where the Mannich condensation reaction is carried out,
- said production process system comprising flow lines, a reactor, a distillation column, a reboiler, a condenser, and a phase separator,
- wherein the methacrolein polymerization inhibitor is introduced into the distillation column in the production process system.
1 more element
Dependencies are inferred from the claim text.