公开(公告)号：US20180371164A1

公开(公告)日：2018-12-27

申请号：US16064393

申请日：2016-12-20

Applicant: SHELL OIL COMPANY

Inventor： Garo Garbis VAPORCIYAN ,  Kunquan YU

IPC: C08G64/30 ,  C08G64/04

Abstract: A process for producing polycarbonate comprising contacting a dihydroxy capped carbonate and a diaryl carbonate in a reaction zone in the presence of a polymerization catalyst under polymerization conditions to produce polycarbonate.

公开(公告)号：US20180371162A1

公开(公告)日：2018-12-27

申请号：US16064400

申请日：2016-12-20

Applicant: SHELL OIL COMPANY

Inventor： Garo Garbis VAPORCIYAN ,  Kunquan YU

IPC: C08G64/30 ,  C08L69/00

Abstract: A process for producing polycarbonate comprising: a) contacting a dialkyl carbonate with a dihydroxy compound in an oligomerization zone in the presence of an oligomerization catalyst under oligomerization conditions to form a first intermediate; and b) contacting the first intermediate with a diaryl carbonate in a polymerization zone in the presence of a polymerization catalyst under polymerization conditions to produce the polycarbonate wherein the molar ratio of dihydroxy compound to dialkyl carbonate in the oligomerization zone is at least 2:1.

公开(公告)号：US20140275600A1

公开(公告)日：2014-09-18

申请号：US14291312

申请日：2014-05-30

Applicant: SHELL OIL COMPANY

Inventor： Evert VAN DER HEIDE ,  Garo Garbis VAPORCIYAN ,  Cornelis Leonardus Maria VROUWENVELDER

IPC: C07C68/06

CPC classification number: C07C68/06 ,  C07C68/065 ,  C07C68/08 ,  C07C69/96

Abstract: The invention relates to a process for removing an alkanol impurity from a stream containing an organic carbonate and the alkanol impurity, comprising contacting the stream with a catalyst to effect reaction of the alkanol impurity with the organic carbonate.

Abstract translation: 本发明涉及一种从含有机碳酸盐和链烷醇杂质的流中除去烷醇杂质的方法，包括使该物流与催化剂接触以使链烷醇杂质与有机碳酸酯反应。