Patent · US Active

Process for producing aqueous polyacrylamide solutions

US11384177B2 · kind B2 · utility

3Cited by

5References

32Claims

0Family size

Assignee

BASF SE

Inventors

Tobias Joachim Zimmermann · Munich, DE
Faissal-Ali El-Toufaili · Ludwigshafen, DE
Hazel Sprafke · Lampertheim, DE

Key dates

Filing date	Oct 18, 2018
Grant date	Jul 12, 2022
Priority date	—
Expiry date	Jun 25, 2039

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B21/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide obtained by hydrolyzing acrylonitrile in water in the presence of a biocatalyst capable of converting acrylonitrile to acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide gel hold in a transportable polymerization unit from a location A to a location B. The aqueous polyacrylamide gel furthermore comprises at least one stabilizer for prevention of polymer degradation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.