Process and apparatus for producing an aqueous polymer solution

US10927222B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Sandra JECK · Mannheim, DE
• Oliver Soetje · Mannheim, DE
• Tobias BRINGMANN · Ludwigshafen, DE
• Gabriela Eugenia Fonseca Zepeda · Mannheim, DE
• Dirk Meckelnburg · Schifferstadt, DE
• Dennis Loesch · Altrip, DE
• Bjoern Langlotz · Trostberg, DE
• John Scott Barratt · Mirfield, GB
• Faissal-Ali El-Toufaili · Ludwigshafen, DE
• Hazel Sprafke · Lampertheim, DE
• Bernd Schube · Mutterstadt, DE
• Markus Ostermayr · Ludwigshafen am Rhein, DE

Key dates

• Filing date: Apr 20, 2017
• Grant date: Feb 23, 2021
• Expiry date: Apr 20, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2333/26
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for producing an aqueous polymer solution, including: (a) providing a hydrated polymer that has been prepared by aqueous solution polymerisation of ethylenically unsaturated monomers, which hydrated polymer contains at least 10% by weight active polymer; (b) cutting the hydrated polymer by subjecting the hydrated polymer to at least one cutting stage containing at least one stream of aqueous liquid at a pressure of at least 150 bar to reduce the size of the hydrated polymer; and (c) dissolving the hydrated polymer in an aqueous liquid so as to obtain an aqueous polymer solution. An apparatus for producing an aqueous polymer solution.