公开(公告)号：US09776104B2

公开(公告)日：2017-10-03

申请号：US14364601

申请日：2012-12-14

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： Timothy C. Frank ,  J. W. Moore ,  Paul A. Larsen ,  Pramod D. Patil ,  Robert M. Whittingslow ,  Paul A. Gillis

IPC: B01D9/00 ,  B01D1/24 ,  B01D1/00

CPC classification number: B01D9/00 ,  B01D1/007 ,  B01D1/24 ,  B01D9/0031

Abstract: Disclosed are processes and apparatuses for producing a crystalline product. The processes and apparatuses may extend the operational time of an evaporative crystallizer by providing an internal volume or large deposit inventory for fouling deposits to reside without impacting the unit operation.

公开(公告)号：US20170144956A1

公开(公告)日：2017-05-25

申请号：US15323532

申请日：2015-06-25

Applicant: Dow Global Technologies LLC

Inventor： Timothy C. Frank ,  Vishesh H. Shah ,  Paul A. Larsen

IPC: C07C51/487 ,  C07C51/377

CPC classification number: C07C51/487 ,  C07C51/377 ,  C07C57/04

Abstract: A process comprising subjecting a composition comprising an alpha- or beta-hydroxycarboxylic acid, water, an extraction solvent, and an acid catalyst to extractive dehydration to form an unsaturated carboxylic acid product.

公开(公告)号：US20140338843A1

公开(公告)日：2014-11-20

申请号：US14364601

申请日：2012-12-14

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： Timothy C. Frank ,  J.W. Moore ,  Paul A. Larsen ,  Pramod D. Patil ,  Robert M. Whittingslow ,  Paul A. Gillis

IPC: B01D9/00

CPC classification number: B01D9/00 ,  B01D1/007 ,  B01D1/24 ,  B01D9/0031

Abstract: Disclosed are processes and apparatuses for producing a crystalline product. The processes and apparatuses may extend the operational time of an evaporative crystallizer by providing an internal volume or large deposit inventory for fouling deposits to reside without impacting the unit operation.

Abstract translation: 公开了用于生产结晶产品的方法和装置。 工艺和设备可以通过提供用于污染沉积物的内部体积或大的沉积物库存而不影响单元操作来延长蒸发结晶器的操作时间。

公开(公告)号：US10125076B2

公开(公告)日：2018-11-13

申请号：US15323532

申请日：2015-06-25

Applicant: Dow Global Technologies LLC

Inventor： Timothy C. Frank ,  Vishesh H. Shah ,  Paul A. Larsen

IPC: C07C51/42 ,  C07C51/487 ,  C07C51/377

Abstract: A process comprising subjecting a composition comprising an alpha- or beta-hydroxycarboxylic acid, water, an extraction solvent, and an acid catalyst to extractive dehydration to form an unsaturated carboxylic acid product.