PREPARATION METHOD AND APPARATUS FOR METHYL METHACRYLATE

WIPO Patent Application WO/2023/071490

A1

The present application relates to a preparation method and apparatus for methyl methacrylate. The preparation method comprises an aldol condensation reaction, first distillation, second distillation, third distillation, phase splitting, and fourth distillation, so that by means of the control of a process flow, it is only needed to use methyl propionate as a ninth material stream and use a formalin solution as a fifteenth material stream so as to perform the aldol condensation reaction, and a final product, i.e., methyl methacrylate, is obtained from a third material stream, and waste materials comprising low formaldehyde residues is recovered from an eighth material stream.

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WU LEI (CN)
CHENG KUNPENG (CN)
LI XUEMING (CN)
HONG RUNRUN (CN)
SHI QING'AI (CN)
WANG CHUANG (CN)
HUANG GUODONG (CN)
ZHOU GUIYANG (CN)

PCT/CN2022/115487

May 04, 2023

August 29, 2022

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ZHEJIANG NHU CO LTD (CN)
ZHEJIANG NHU SPECIAL MAT CO LTD (CN)

C07C67/343; C07C69/54

CN106674010A	2017-05-17
CN111574369A	2020-08-25
CN111517953A	2020-08-11
CN110981727A	2020-04-10
CN109232247A	2019-01-18

ADVANCE CHINA IP LAW OFFICE (HANGZHOU) (CN)

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