Process for producing polymers

US9732174B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Shankara Narayanan Keelapandal Ramamoorthy · Schifferstadt, DE
• Oliver Soetje · Mannheim, DE
• John Scott Barratt · Mirfield, GB
• Gabriela Eugenia Fonseca Zepeda · Mannheim, DE

Key dates

• Filing date: Mar 4, 2016
• Grant date: Aug 15, 2017
• Expiry date: Mar 4, 2036

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/24
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for preparation of a polymer product comprising the steps ofi) feeding an aqueous mixture comprising a monoethylenically unsaturated monomer or a mixture of monoethylenically unsaturated monomers into a first reactor device (2) through at least one inlet;ii) partially polymerizing the monomer or monomers and transferring the polymerizing monomer or mixture of monomers from the inlet to an outlet (3) of the first reactor device (2) to provide a partially polymerized product;iii) flowing the partially polymerized product out of the outlet (3), in which no more than 60% of the monomer or mixture of monomers has been polymerized in the partially polymerized product as it exits the outlet (3) of first reactor device (2), and transferring it to a further reactor device (5), in which the further reactor device (5) has an inlet and an outlet (6);iv) continuing the polymerization in the further reactor device (5) and removing the polymer product from the outlet (6) of the further reactor device (5),characterized in that the first reactor device (2) comprises a positive displacement pump.