Title:
METHOD FOR SIMULTANEOUSLY MANUFACTURING DIFFERENT MIXTURES OF DIPHENYLMETHANE DIISOCYANATE ISOMER
Document Type and Number:
Japanese Patent JP2014208644
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an economical and efficient method for manufacturing simultaneously two kinds of MDI isomer streams having clear composition.SOLUTION: A process for separating a diphenylmethane diisocyanate (MDI) mixer isomer supply material stream (MIx) into two MDI mixed isomer streams (MIy and MIz) by a single process of a suspension molten crystallization process is contained, where x, y and z are weight% of 4,4'-MDI isomer contained in the MDI isomer mixture, x is 80 to 92, y is 97 to 99 and z is 60 to 80, the suspension molten crystallization process includes a crystallization process and crystal is formed in the crystallization process and separated from liquid by a following separation process, thereby an isomer mixture is formed by melting the crystal, a residual mother liquid is divided into a recirculation steam and a second isomer mixture, and the recirculation steam may be fed back to a crystallization section.
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Inventors:
JOHANNES LODEWIJK KOOLE
ADOLF DAAN ZIJI
ROBERT HENRY CARR
ADOLF DAAN ZIJI
ROBERT HENRY CARR
Application Number:
JP2014097490A
Publication Date:
November 06, 2014
Filing Date:
May 09, 2014
Export Citation:
Assignee:
HUNTSMAN INTERNATL LLC
International Classes:
C07C263/20; C07C265/14
Domestic Patent References:
| JPS5035142A | 1975-04-03 |
Attorney, Agent or Firm:
Ono Shinjiro
Kobayashi 泰
Shigeo Takeuchi
Yamamoto 修
Mitsutoshi Nakamura
Kobayashi 泰
Shigeo Takeuchi
Yamamoto 修
Mitsutoshi Nakamura
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