Patent · US Active

Process for the rectification of mixtures of high-boiling air- and/or temperature-sensitive useful products

US8747621B2 · kind B2 · utility

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6References

1Claims

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Assignee

DSM IP ASSETS B.V. · NL

Inventors

Juan Ramon Herguijuela · Auggen, DE
Werner Pietzonka · Therwil, CH
Angela Wildermann · Kaiseraugst, CH
Thomas Wolf · Haan, DE

Key dates

Filing date	Apr 1, 2013
Grant date	Jun 10, 2014
Priority date	—
Expiry date	Apr 1, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D311/72
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for the rectification of mixtures of high-boiling air- and/or temperature-sensitive substances which require a high separation efficiency is proposed, in particular a process for the working-up of a VE- or VEA-containing product stream. The process includes a first purification stage to separate low-boiling products and unspecified isomers of the useful product from the product stream virtually without loss of useful product and a second purification stage for removing the useful product in a stream having a purity of >97% by weight and a further stream having a purity of >92% by weight.

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