Patent · US Expired

Continuous method and heat pump device for enriching liquid low-concentrated reaction mixtures

US6906234B1 · kind B1 · utility

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9Claims

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Assignee

Symrise GmbH & Co. KG · DE

Inventors

Jürgen Braband · Leipzig, DE
Peter Müller · Chicago, US
Rüdiger Bernhardt · Plodda, DE
Andreas Otto · Fürth, DE

Key dates

Filing date	Jul 30, 1999
Grant date	Jun 14, 2005
Priority date	—
Expiry date	Jul 30, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C6/06
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A continuous method and a heat pump device for enrichment of low-concentrated reaction mixtures resulting from the production of cycloalkanedienes by means of catalytic metathesis of cyclic aliphatic alkenes and cyclooligomers in organic reaction media with reduced energy consumption. Using the heat pump principle, liquid reaction mixtures with a content of at least 0.1 w/w % are enriched in an organic reaction medium to 30 to 50 w/w %. The organic reaction medium at temperature T1 is evaporated in an evaporator, the vapor is withdrawn and compressed to temperature T2 in a compressor, at a pressure difference of 0.25 to 1 bar. Compressed vapor of the reaction medium transfers heat energy obtained from electric energy in the heat exchanger of the evaporator to the organic reaction medium at temperature T1, and the temperature difference (T2−T1) does not exceed 12 K.

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