公开(公告)号：US20180305223A1

公开(公告)日：2018-10-25

申请号：US15770230

申请日：2016-10-27

Applicant: BASF SE

Inventor： Sujandi SUJANDI ,  Sophie MAITRO-VOGEL ,  Stephan NIED ,  Heike GLADE

IPC: C02F1/08 ,  B01D1/06 ,  B01D1/04 ,  B01D1/26 ,  B01D1/16 ,  C02F1/04

CPC classification number: C02F1/08 ,  B01D1/04 ,  B01D1/065 ,  B01D1/16 ,  B01D1/26 ,  C02F1/042 ,  C02F1/547 ,  C02F1/56 ,  C02F5/10

Abstract: Processes for the separation of water from a mixture of water with other components, comprising the following steps: A) providing feed material FM comprising water and at least one a nonionic surfactant S in an amount of 0.1 to 1000 ppm by weight based on the feed material FM, B) subjecting said feed material FM to a distillation step using a falling film evaporator.

公开(公告)号：US20190094192A1

公开(公告)日：2019-03-28

申请号：US15527148

申请日：2015-11-18

Applicant: BASF SE

Inventor： Hans-Peter KAUB ,  Patrick KELLER ,  Sujandi SUJANDI ,  Stephan NIED

IPC: G01N31/22 ,  G01N21/78

Abstract: The present invention relates to a method for the determination of a concentration (C) of a polyacrylic acid (PAA) in an aqueous medium (AM) wherein the determination is performed photometrically in the presence of a dye (I). The present invention furthermore, relates to a method for the determination of a concentration (C) of a polyacrylic acid (PAA) in an aqueous medium (AM) wherein at least two different transmittance values are measured using at least two different wavelengths and wherein the at least two different transmittance values are analyzed to determine the concentration (C) of the polyacrylic acid (PAA). The present invention also relates to the use of a dye (I) for the determination of the concentration (C) of a polyacrylic acid (PAA).