发明名称 |
CONTINUOUS POLYAMIDATION PROCESS - II |
摘要 |
A continuous process for the manufacture of a polyamide, the process comprising the steps of: (i)flowing a stream A comprising a moltendicarboxylic acid, or a molten dicarboxylic acid-rich mixture comprising a dicarboxylic acid and a diamine, through a first stage and at least one more reaction stage of a vertical multistage reactor, wherein the first stage is at the top of the reactor; (ii)counter-currently flowing a stream B comprising a diamine as either a vapour or a diamine-rich liquid through at least one of the stages below the first reaction stage of said vertical multistage reactor; (iii)accumulating a liquid phase material P comprising polyamide at and/or below the final stage of said reactor; wherein said reactor is equipped with internal features suitable for effecting contact between counter-currently flowing streams A and B; and wherein the process further comprises controlling the viscosity of said liquid phase material P by directly controlling the chemical equilibrium of the polyamidation reactionor by controlling stream B so that the amounts of diamine and dicarboxylic acid introduced intothe reactorduring the processare stoichiometrically imbalanced. The invention further provides a vertical multistage reactor configured to implement said process. |
申请公布号 |
WO2015075458(A1) |
申请公布日期 |
2015.05.28 |
申请号 |
WO2014GB53438 |
申请日期 |
2014.11.20 |
申请人 |
INVISTA TECHNOLOGIES S.À R.L.;MARCHILDON, KEITH;SURGENOR, KAREN A.;KAUSHIVA, BRYAN D. |
发明人 |
MARCHILDON, KEITH;SURGENOR, KAREN A.;KAUSHIVA, BRYAN D. |
分类号 |
C08G69/28;B01J14/00;B01J19/24 |
主分类号 |
C08G69/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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