公开(公告)号：US09969849B2

公开(公告)日：2018-05-15

申请号：US15119857

申请日：2015-02-16

Applicant: BASF SE

Inventor： Joerg Erbes ,  Gerhard Lange ,  Tobias Kortekamp ,  Bernhard Linner ,  Cecile Schneider ,  Angela Ulzhoefer ,  Robert Heinz ,  Michael Klemens Mueller

IPC: C08J3/14 ,  C08G75/20 ,  C08G75/23 ,  B29B13/06 ,  F26B5/14 ,  C08J3/12 ,  F26B3/08

CPC classification number: C08J3/14 ,  B29B13/065 ,  C08J3/12 ,  C08J2381/06 ,  F26B3/08 ,  F26B5/14 ,  F26B2200/08

Abstract: The present invention relates to a process for drying particulate polymers, comprising the steps of: a) providing a particulate polymer comprising from 60 wt % to 90 wt % of at least one solvent based on the total weight of particulate polymer and solvent, b) mechanically predrying the particulate polymer to a content of the at least one solvent of from 20 wt % to 50 wt % based on the total weight of particulate polymer and solvent, wherein the mechanical predrying in step b) is carried out with a roller press, and c) end-drying the particulate polymer to a content of the at least one solvent of from 0 wt % to 15 wt % based on the total weight of particulate polymer and solvent, wherein the particulate polymer is a polymer comprising repeating units of formulae I, II and/or III The present invention further relates to a process for working up particulate polymers.

公开(公告)号：US20170058239A1

公开(公告)日：2017-03-02

申请号：US15118808

申请日：2015-02-06

Applicant: BASF SE

Inventor： Markus Hartmann ,  Marta Reinoso Garcia ,  Michael Klemens Mueller ,  Roland Boehn ,  Markus Christian Biel

IPC: C11D3/39 ,  C11D17/06 ,  C11D11/02 ,  C11D3/33 ,  C11D3/37

CPC classification number: C11D3/3942 ,  C11D3/33 ,  C11D3/3761 ,  C11D11/02 ,  C11D17/06

Abstract: The present invention is directed towards a process for making a powder or granule containing (A) at least one chelating agent selected from methyl glycine diacetic acid (MGDA) and glutamic acid diacetate (GLDA) and iminodisuccinic acid (IDS) and their respective alkali metal salts, (B) at least one homo- or copolymer of (meth)acrylic acid, partially or fully neutralized with alkali, said process comprising the steps of (a) mixing the at least one chelating agent (A) and the at least one homo- or copolymer (B) in the presence of water, (b) removing most of said water by spray-drying or spray granulation using a gas with an inlet temperature of at least 125° C.

Abstract translation: 本发明涉及制备含有（A）至少一种选自甲基甘氨酸二乙酸（MGDA）和谷氨酸二乙酸酯（GLDA）和亚氨基二琥珀酸（IDS）及其各自的碱金属的螯合剂的粉末或颗粒的方法 盐，（B）至少一种与碱部分或完全中和的（甲基）丙烯酸的均聚物或共聚物，所述方法包括以下步骤：（a）将至少一种螯合剂（A）和至少一种螯合剂 均聚物或共聚物（B），（b）使用入口温度至少为125℃的气体通过喷雾干燥或喷雾造粒除去大部分所述水。