发明名称 |
CONCENTRATING METHOD, TREATING METHOD, CONCENTRATING SYSTEM AND TREATING SYSTEM FOR POLYISOCYANATE RESIDUES |
摘要 |
A concentrating method and a concentrating system for concentrating polyisocyanate residues that can effectively concentrate polyisocyanate residues from crude polyisocyanate comprising polyisocyanate and polyisocyanate residues in a short time and can also suppress increase in viscosity to provide stable transport of the residues and prevent blockage of the transport line, and a treating method and a treating system for decomposing the concentrated components to polyamine . The polyisocyanate residues are first heated on the boil by the distiller to be concentrated to a midterm concentrating rate, and then, the polyisocyanate residues are concentrated to the final concentrating rate by evaporation using a evaporator. This can allow the polyisocyanate residues to be decomposed to polyamine to be recovered by setting a Cl content of a high boiling point distillate fraction concentrated to be not more than 2 weight% and then putting the high boiling point distillate fraction into contact with high temperature and high pressure water to be hydrolyzed by the decomposing apparatus . |
申请公布号 |
WO2007007887(A3) |
申请公布日期 |
2007.08.30 |
申请号 |
WO2006JP314119 |
申请日期 |
2006.07.10 |
申请人 |
MITSUI CHEMICALS POLYURETHANES, INC.;SASAKI, MASAAKI;YOSHIDA, TADASHI;SUZUKI, SHIGETOSHI |
发明人 |
SASAKI, MASAAKI;YOSHIDA, TADASHI;SUZUKI, SHIGETOSHI |
分类号 |
C07C263/20;C07C265/14 |
主分类号 |
C07C263/20 |
代理机构 |
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代理人 |
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