公开(公告)号：US20200308351A1

公开(公告)日：2020-10-01

申请号：US16767169

申请日：2019-01-08

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Niket SHARMA ,  Deshmukh SHIVAJIRAO SANDESH ,  Rajesh CHOWDHURY ,  Atul PANT ,  Gaurav MEDIRATTA

IPC: C08J3/14 ,  B01D9/00

Abstract: A process and system for the precipitation of poly(phenylene ether) is described. Precipitated poly(phenylene ether) obtained by the processes disclosed herein are in the form of poly(phenylene ether) particles having a bulk density of 150 to 500 kg/m3, preferably 250 to 500 kg/m3.

公开(公告)号：US20180362430A1

公开(公告)日：2018-12-20

申请号：US16061764

申请日：2016-11-10

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Rajesh CHOWDHURY ,  Eylem TARKIN-TAS ,  Xuezhi JIN

IPC: C07C41/01 ,  C07C46/08

CPC classification number: C07C41/01 ,  C07C37/11 ,  C07C46/08 ,  C08G65/44 ,  C08G65/485 ,  C07C50/08 ,  C07C39/15 ,  C07C43/295

Abstract: A phenylene ether oligomer is prepared by a process that includes partially converting 2,6-dimethylphenol to 3,3′,5,5′-tetramethyl-4,4′-dihydroxybiphenyl and/or 3,3′,5,5′-tetramethyldiphenoquinone, converting the residual 2,6 dimethylphenol to poly(2,6-dimethyl-1,4-phenylene ether) and any 3,3′,5,5′-tetramethyl-4,4′-dihydroxybiphenyl to 3,3′,5,5′-tetramethyldiphenoquinone, and reacting the poly(2,6-dimethyl-1,4-phenylene ether) and 3,3′,5,5′-tetramethyldiphenoquinone to form the phenylene ether oligomer. The preparation can be conducted without isolation of intermediates.