Title:
A method for refining the mixture containing 4 and 4'-methylenediphenyldiisocyanate
Document Type and Number:
Japanese Patent JP6046043
Kind Code:
B2
Abstract:
The invention relates to a process for purifying mixtures comprising 4,4'-methylene diphenyl diisocyanate, comprising the distillative purification of a mixture I comprising 4,4'-methylene diphenyl diisocyanate having a content of hydrolysable chlorine to ASTM D4663-10 of more than 100 ppm by means of a column K1, wherein the gaseous stream consisting of mixture I is contacted in column K1 with at least one liquid compound A which has a boiling point which is the same as or higher than 4,4'-methylene diphenyl diisocyanate and which has a content of hydrolysable chlorine to ASTM D4663-10 of at most 100 ppm, and wherein the gaseous stream O which is obtained at the top of the column and comprises 4,4'-methylene diphenyl diisocyanate has a content of hydrolysable chlorine to ASTM D4663-10 of at most 100 ppm.
Inventors:
Bock michael
Jacobs, Johannes
Thiele, Chi
Melten, Anne-Catrine
Jacobs, Johannes
Thiele, Chi
Melten, Anne-Catrine
Application Number:
JP2013539231A
Publication Date:
December 14, 2016
Filing Date:
November 15, 2011
Export Citation:
Assignee:
BASF SE
International Classes:
C07C263/20; C07C265/14
Domestic Patent References:
| JP5163231A | ||||
| JP53009750A | ||||
| JP5058982A |
Foreign References:
| US4294666 |
Attorney, Agent or Firm:
Satoshi Eto