Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By plural serial diverse separations
Reexamination Certificate
2005-06-14
2005-06-14
Dang, Thuan Dinh (Department: 1764)
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By plural serial diverse separations
C585S643000, C203S026000, C159S024100, C159S024200, C159S024300
Reexamination Certificate
active
06906234
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 The organic reaction medium at temperature T1is evaporated in an evaporator, the vapor is withdrawn and compressed to temperature T2in a compressor, at a pressure difference of 0.25 to 1 bar.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.
REFERENCES:
patent: 343437 (1989-11-01), None
patent: 1105565 (1998-03-01), None
Bernhardt Rüdiger
Braband Jürgen
Möller Peter
Otto Andreas
Dang Thuan Dinh
Pendorf & Cutliff
Symrise GmbH & Co. KG
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