Patent · US Expired

Purification of a monomer by extraction with a phase former and crystallization

US7495129B2 · kind B2 · utility

9Cited by

17References

10Claims

0Family size

Assignee

Evonik Stockhausen GmbH · US

Inventors

Torsten Balduf · Pfungstadt, DE
Stefan Nordhoff · Recklinghausen, DE
Dennis Thong Yu-Chiang · Marl, DE
Axel Kobus · Langen, DE
Martin Roos · Oestrich-Winkel, DE

Key dates

Filing date	Jan 13, 2004
Grant date	Feb 24, 2009
Priority date	—
Expiry date	Dec 4, 2024

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/48
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention concerns a process for purification of an acidic monomer having a double bond, as well as a device for synthesis of an acidic monomer having a double bond, a process for producing an acidic monomer having a double bond, an acid monomer having a double bond and obtainable by this process, fibers, formed bodies, films, foams, superabsorbent polymers and other special polymers based on or containing this acidic monomer, the use of this acidic monomer in or for producing fibers, formed bodies, films, foams, superabsorbent polymers or other special polymers.

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