Method for diisocyanate recovery from distillation residues with bitumen

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12139447
APP PUB NO 20210276944A1
SERIAL NO

17260624

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Abstract

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The invention relates to a method for recovering a diisocyanate which is solid at room temperature from a distillation residue from a process for producing the diisocyanate, comprising the following steps: (i) mixing the distillation residue with a bitumen such that a mixture is obtained which contains 70 to 90 wt % of the distillation residue and 10 to 30 wt % of the bitumen, each in relation to the mixture, (ii) distilling the mixture in a thin-film evaporator or a falling film evaporator to obtain a sump discharge and a gaseous product stream, (iii) condensing the gaseous product stream and obtaining a solid containing the diisocyanate which is solid at room temperature. The invention further relates to the use of a thin-film evaporator or falling film evaporator, to a composition containing the diisocyanate which is solid at room temperature, and to a method for producing an elastomer from this composition and to the elastomer itself.

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Patent Owner(s)

Patent OwnerAddress
COVESTRO DEUTSCHLAND AGKAISER-WILHELM-ALLEE 60 LEVERKUSEN 51373

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Guttmann, Thomas Langenfeld, DE 3 0
Latorre, Martinez Irene Cristina Leverkusen, DE 6 0
Morawski, Joerg Leverkusen, DE 5 0
Stoye, Claudine Cologne, DE 7 2
Tadjbach, Sascha Bergisch Gladbach, DE 4 10
Voigt, Thomas Langenfeld, DE 20 98
Zorn, Anna-Marie Ettlingen, DE 5 0

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