Title:
イソシアネートの製造方法
Document Type and Number:
Japanese Patent JP3864209
Kind Code:
B2
Abstract:
PCT No. PCT/EP95/04354 Sec. 371 Date May 12, 1997 Sec. 102(e) Date May 12, 1997 PCT Filed Nov. 6, 1995 PCT Pub. No. WO96/16028 PCT Pub. Date May 30, 1996Isocyanates are prepared by a continuous process by reacting appropriate primary amines with phosgene in the presence of an isocyanate as solvent, the primary amine optionally dissolved in an inert organic solvent being reacted with phosgene, which is dissolved in the isocyanate, at temperatures of 60 to 150 DEG C. and at pressures of 1 to 30 bar (105 to 3.106 Pa) to obtain the corresponding isocyanate, wherein the molar ratio of phosgene to amine used is 4:1 to 1:1, and the isocyanate used as solvent is solids-free and has a value for hydrolysable chlorine of less than 2%.
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Inventors:
Darling, thomas, robert
Zunderman, Rudolph
Jones, Tappy H.
Zunderman, Rudolph
Jones, Tappy H.
Application Number:
JP51649096A
Publication Date:
December 27, 2006
Filing Date:
November 06, 1995
Export Citation:
Assignee:
Bayer Actien Gezershyaft
International Classes:
C07C263/10; C07C265/14
Domestic Patent References:
| JP35010774B1 | ||||
| JP45001447B1 |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard