Invention Grant
- Patent Title: Process for producing superabsorbents
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Application No.: US15746492Application Date: 2016-07-21
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Publication No.: US10226753B2Publication Date: 2019-03-12
- Inventor: Norbert Herfert , Wanthip Poomsuwan , Thomas Gieger
- Applicant: BASF SE
- Applicant Address: DE Ludwigshafen TH Bangkok
- Assignee: BASF SE,BASF (THAI) LTD.
- Current Assignee: BASF SE,BASF (THAI) LTD.
- Current Assignee Address: DE Ludwigshafen TH Bangkok
- Agency: Marshall, Gerstein & Borun LLP
- Priority: EP15179835 20150805
- International Application: PCT/EP2016/067411 WO 20160721
- International Announcement: WO2017/021167 WO 20170209
- Main IPC: B01J20/26
- IPC: B01J20/26 ; A61L15/60 ; C08F2/01 ; C08F2/10 ; C08F220/06 ; C09D183/08 ; C08J3/12 ; C08L33/02 ; A61L15/22 ; B01J19/06 ; B01J20/30 ; C08J3/24 ; C08G77/28
Abstract:
The invention relates to a process for producing superabsorbents, comprising the preparation of partly neutralized acrylic acid by the steps (i) preparing an over-neutralized acrylic acid having a degree of neutralization of at least 100.1 mol-% by mixing of an acrylic acid 1 and a base and (ii) preparing a neutralized acrylic acid having a degree of neutralization from 50 to 85 mol-% by mixing of the over-neutralized acrylic acid and an acrylic acid 2, wherein the content of dimeric acrylic acid in the acrylic acid 2 is lower than the content of dimeric acrylic acid in the acrylic acid 1.
Public/Granted literature
- US20180200691A1 PROCESS FOR PRODUCING SUPERABSORBENTS Public/Granted day:2018-07-19
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