Patent · US Expired

Highly concentrated formaldehyde solution, production and reaction thereof

US7193115B2 · kind B2 · utility

1Cited by

1References

14Claims

0Family size

Assignee

BASF SE

Inventors

Eckhard Ströfer · Mannheim, DE
Martin Sohn · Mannheim, DE
Hans Hasse · Kaiserslautern, DE
Klemens Schilling · Stuttgart, DE

Key dates

Filing date	Nov 5, 2002
Grant date	Mar 20, 2007
Priority date	—
Expiry date	Jun 21, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C45/82
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

In an aqueous formaldehyde solution comprising formaldehyde in the form of monomeric formaldehyde, methylene glycol and polyoxymethylene glycols in a total concentration x of ≧65% by weight, the mean molar mass M of the polyoxymethylene glycols is, as a function of the formaldehyde concentration, equal to or less than the values given by equation I:where:

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