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:
Jul. 07, 2020
Filed:
Nov. 11, 2016
Applicant:
St Pharm Co., Ltd., Gyeonggi-do, KR;
Inventors:
Geun Jho Lim, Seoul, KR;
Sun Ki Chang, Gyeonggi-do, KR;
Hyun Woo Baek, Gyeonggi-do, KR;
Jun Hyun Oh, Gyeonggi-do, KR;
Yeong Hun Kim, Gyeonggi-do, KR;
Assignee:
ST PHARM CO., LTD., , KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 9/655 (2006.01); B01J 31/02 (2006.01); C07F 9/50 (2006.01); C08L 61/34 (2006.01);
U.S. Cl.
CPC ...
B01J 31/0267 (2013.01); B01J 31/02 (2013.01); C07F 9/5027 (2013.01); C07F 9/5072 (2013.01); C07F 9/6552 (2013.01); B01J 2231/14 (2013.01); C08L 61/34 (2013.01);
Abstract
The present disclosure provides a method for preparing ((2,2-dimethyl-1,3-dioxane-5,5-diyl)bis(methylene))bis(bis(2-methoxyphenyl)phosphine), a ligand for a polyketone polymerization catalyst, under mild conditions with high purity and high yield. Therefore, the preparation method of the present disclosure can be easily applied to mass production.