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. 08, 2021
Filed:
Jan. 06, 2020
Shenyang Gold Jyouki Technology Co., Ltd, Liaoning, CN;
Shenyang Gold Jyouki Technology Co., Ltd, Fushun, CN;
Abstract
A method of preparing β-hydroxycarboxylic acid ester comprises mixing an alkylene oxide, a monohydric alcohol and a composite catalyst, and performing a carbonylation esterification reaction in a carbon monoxide atmosphere to obtain the β-hydroxycarboxylic acid ester. The composite catalyst comprises a main catalyst, a cocatalyst and a reducing agent. the main catalyst is at least one of a cobalt salt, cobalt oxide and cobalt hydroxide. The cocatalyst is a nitrogen-containing heterocyclic compound. The reducing agent is a base metal. The method is an atomic reaction type process, does not produce three wastes, and has high conversion rate. It is a green environmental protection process. The composite catalyst used does not contain Co(CO). The raw materials and catalyst used are all cheap and easily available. The composite catalyst can be used repeatedly at a lower cost, and is suitable for industrial applications.