The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 2026
Filed:
Aug. 31, 2023
Zhejiang Nhu Company Ltd., Shaoxing, CN;
Zhejiang Nhu Special Materials Co., Ltd., Shaoxing, CN;
Lei Wu, Shaoxing, CN;
Kunpeng Cheng, Shaoxing, CN;
Xueming Li, Shaoxing, CN;
Runrun Hong, Shaoxing, CN;
Qing'ai Shi, Shaoxing, CN;
Chuang Wang, Shaoxing, CN;
Guodong Huang, Shaoxing, CN;
Guiyang Zhou, Shaoxing, CN;
ZHEJIANG NHU COMPANY LTD., Shaoxing, CN;
ZHEJIANG NHU SPECIAL MATERIALS CO., LTD., Shaoxing, CN;
Abstract
A method and apparatus for preparing methyl methacrylate (MMA) are provided. The method includes an aldol condensation reaction, a first distillation, a second distillation, a third distillation, a phase splitting, and a fourth distillation. Through the control of the process, the aldol condensation reaction can be performed when methyl propionate is used as the ninth material stream and formalin solution is used as the fifteenth stream material, MMA is obtained as the final product from the third material stream, and the waste with low content of residual formaldehyde is recovered from the eighth material stream.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile