公开(公告)号：EP2785672A1

公开(公告)日：2014-10-08

申请号：EP12766786.3

申请日：2012-09-13

Applicant: Invista Technologies S.à.r.l.

Inventor： BADAT, Hashim, M. ,  GAUSE, Jason, C.

IPC: C07C29/80 ,  C07C29/88 ,  C07C33/046

CPC classification number: C07C29/80 ,  C07C29/88 ,  C07C33/046

Abstract: An improved method for removing formaldehyde from a crude butynediol product stream comprising the step of providing a crude butynediol stream containing butynediol and formaldehyde. A pH control agent is then mixed with the crude butynediol stream to form a treated product stream, wherein the pH of the treated product stream is raised to a level that limits the reaction of butynediol and formaldehyde to form acetal complex and decrease the solubility of trace metals. The treated product stream then flows into the inlet of a continuous distillation column. Finally, a concentrated formaldehyde stream from the overhead stream of the distillation column and a concentrated butynediol stream from the distillation bottoms stream that is essentially free of formaldehyde and acetal complex are both recovered.

公开(公告)号：EP2785672B1

公开(公告)日：2016-10-26

申请号：EP12766786.3

申请日：2012-09-13

Applicant: Invista Technologies S.à.r.l.

Inventor： BADAT, Hashim, M. ,  GAUSE, Jason, C.

IPC: C07C29/80 ,  C07C29/88 ,  C07C33/046

CPC classification number: C07C29/80 ,  C07C29/88 ,  C07C33/046

公开(公告)号：EP2726535A1

公开(公告)日：2014-05-07

申请号：EP12733338.3

申请日：2012-06-22

Applicant: Invista Technologies S.à.r.l.

Inventor： GAUSE, Jason, C. ,  SISLER, Gregg, M. ,  SUN, Qun

IPC: C08G65/00

CPC classification number: C08G65/2696 ,  Y02P20/584

Abstract: A method for preventing pressure build-up across a catalyst separation in a polyether polyol reactor comprising the steps of feeding reactants that comprise a monomer or co-monomers to be polymerized to form the polyether polyol into a continuous feed reactor, flowing the product stream through a catalyst separation system within the reactor, wherein the catalyst separation system is comprised of a plurality of filters, wherein each filter comprises an outer surface and an inner surface defined by a plurality of spaced-apart elements, and wherein the distance between the spaced-apart elements is smaller than the minor dimension of the suspended catalyst and recovering the filtered polyether polyol product and catalyst fines from the reactor outlet.