Device and method for synthesis of a polymer under seperation of a gaseous substance

Patent metadata

Field	Value
Publication number	US-2016159983-A1
Application number	US-201414896460-A
Country	US
Kind code	A1
Filing date	Jun 11, 2014
Priority date	Jun 12, 2013
Publication date	Jun 9, 2016
Grant date	—

Abstract

The invention relates to a device for synthesis of a polymer under separation of a gaseous substance. Said device comprises a reaction chamber ( 1 ), which has a top section ( 11 ), a middle section ( 12 ) and a bottom section ( 13 ), an inlet opening ( 2 ) which is arranged in the middle section ( 12 ), a first outlet opening ( 3 ) which is arranged in the bottom section ( 13 ), a second outlet opening ( 4 ) which is arranged in the top section ( 11 ), a first return opening ( 51 ), which is arranged in the bottom section ( 13 ), a second outlet opening ( 52 ), which is arranged under the top section ( 11 ), a distribution device ( 6 ), which is arranged between the top section ( 11 ) and the middle section ( 12 ), and a removal device ( 7 ) which is arranged to be movable along the top section ( 11 ). The invention further relates to a method for synthesis of a polymer which can be carried out in said device.

First claim

1 . A continuous process for synthesizing a polymer with separation of a gaseous substance in an apparatus comprising
a reaction space ( 1 ) having an upper section ( 11 ), a middle section ( 12 ), and a lower section ( 13 ), an inlet orifice ( 2 ) disposed in the middle section ( 12 ), a first outlet orifice ( 3 ) disposed in the lower section ( 13 ), a second outlet orifice ( 4 ) disposed in the upper section ( 11 ), a first return orifice ( 51 ) disposed in the lower section ( 13 ), a second return orifice ( 52 ) disposed beneath the upper section ( 11 ), where the first return orifice ( 51 ) and the second return orifice ( 52 ) are connected to one another by a return line ( 5 ) in which there is disposed a pump ( 53 ) set up to transport a liquid from the first return orifice ( 51 ) to the second return orifice ( 52 ), a distributing device ( 6 ) which delimits the middle section ( 12 ) from the upper section ( 11 ), and a removal device ( 7 ) disposed so as to be movable along the upper section ( 11 ), where the removal device ( 7 ) has a removal head ( 71 ) disposed on the inner wall at the top of the middle section ( 12 ) and where the removal head ( 71 ) makes contact with the inner wall at the top of the middle section ( 12 ) with deformation of the edges of the removal head ( 71 ), where the inlet orifice ( 2 ) is connected by means of an inlet line ( 21 ) to a wall of the upper section ( 11 ), the removal head ( 71 ) having an orifice ( 711 ) through which the inlet line ( 21 ) is conducted, comprising the following process steps: a) feeding a prepolymer melt ( 8 ) into a middle section ( 12 ) of a reaction space ( 1 ) through an inlet orifice ( 2 ), b) transporting a portion of the prepolymer melt ( 8 ) from a lower section ( 13 ) of the reaction space ( 1 ) disposed below the middle section ( 12 ) into an upper section ( 11 ) of the reaction space above the middle section ( 12 ) and distributing the prepolymer melt ( 8 ) over the inner wall of the middle section ( 12 ) by means of a distributing device ( 6 ), c) polymerizing the prepolymer melt ( 8 ) to give a polymer melt, d) removing the polymer melt from the reaction space ( 1 ) through a first outlet orifice ( 3 ) of the reaction space ( 1 ), and e) removing a gaseous substance ( 9 ) from the reaction space ( 1 ) through a second outlet orifice ( 4 ) in the upper section ( 11 ), wherein deposits on at least one inner wall of the upper section ( 11 ) are removed by a removal device ( 7 ).

2 . The process according to claim 1 , wherein the viscosity of the prepolymer melt ( 8 ) is at least 1 mPas.

3 . The process according to claim 1 , wherein the polymer comprises a thermoplastic polymer.

4 . The process according to claim 1 , wherein the polymer is a polyamide and the gaseous substance ( 9 ) is steam.

5 . The process according to claim 1 , wherein the polymer is a semiaromatic polyamide comprising at least one repeat unit having an aromatic group and at least one repeat unit having an aliphatic or cycloaliphatic group in incorporated form.

6 . The process according to claim 1 , wherein the polymer is a polyamide selected from the group consisting of PA 6.T, PA 9.T, PA8.T, PA 10.T, PA 12.T, PA 6.I, PA 8.I, PA 9.I, PA 10.I, PA 12.I, PA 6.T/6, PA 6.T/10, PA 6.T/12, PA 6.T/6.I, PA6.T/8.T, PA 6.T/9.T, PA 6.T/10T, PA 6.T/12.T, PA 12.T/6.T, PA 6.T/6.I/6, PA 6.T/6.I/12, PA 6.T/6.I/6.10, PA 6.T/6.I/6.12, PA 6.T/6.6, PA 6.T/6.10, PA 6.T/6.12, PA 10.T/6, PA 10.T/11, PA 10.T/12, PA 8.T/6.T, PA 8.T/66, PA 8.T/8.I, PA 8.T/8.6, PA 8.T/6.I, PA 10.T/6.T, PA 10.T/6.6, PA 10.T/10.I, PA 10T/10.I/6.T, PA 10.T/6.I, PA 4.T/4.I/46, PA 4.T/4.I/6.6, PA 5.T/5.I, PA 5.T/5.I15.6, PA 5.T/5.I/6.6, PA 6.T/6.I/6.6, PA MXDA.6, PA IPDA.I, PA IPDA.T, PA MACM.I, PA MACM.T, PA PACM.I, PA PACM.T, PA MXDA.I, PA MXDA.T, PA 6.T/IPDA.T, PA 6.T/MACM.T, PA 6.T/PACM.T, PA 6.T/MXDA.T, PA 6.T/6.I/8.T/8.I, PA 6.T/6.I/10.T/10.I, PA 6.T/6.I/IPDA.T/IPDA.I, PA 6.T/6.I/MXDA.T/MXDA.I, PA 6.T/6.I/MACM.T/MACM.I, PA 6.T/6.I/PACM.T/PACM.I, PA 6.T/10.T/IPDA.T, PA 6.T/12.T/IPDA.T, PA 6.T/10.T/PACM.T, PA 6.T/12.T/PACM.T, PA 10.T/IPDA.T, PA 12.T/IPDA.T, and copolymers and mixtures thereof.

7 . The process according to claim 3 , wherein the thermoplastic polymer is selected from the group consisting of polyamides, thermoplastic polyurethanes, polyolefins, vinylaromatic polymers, polyesters, polyacetals, polycarbonates, polysulfones, polyether sulfones and mixtures thereof.

8 . The process according to claim 3 , wherein the polymer is a polyamide and the gaseous substance ( 9 ) is steam.

9 . The process according to claim 4 , wherein the polymer is a semiaromatic polyamide comprising at least one repeat unit having an aromatic group and at least one repeat unit having an aliphatic or cycloaliphatic group in incorporated form.

10 . The process according to claim 5 , wherein the polymer is a polyamide selected from the group consisting of PA 6.T, PA 9.T, PA8.T, PA 10.T, PA 12.T, PA 6.I, PA 8.I, PA 9.I, PA 10.I, PA 12.I, PA 6.T/6, PA 6.T/10, PA 6.T/12, PA 6.T/6.I, PA6.T/8.T, PA 6.T/9.T, PA 6.T/10T, PA 6.T/12.T, PA 12.T/6.T, PA 6.T/6.I/6, PA 6.T/6.I/12, PA 6.T/6.I/6.10, PA 6.T/6.I/6.12, PA 6.T/6.6, PA 6.T/6.10, PA 6.T/6.12, PA 10.T/6, PA 10.T/11, PA 10.T/12, PA 8.T/6.T, PA 8.T/66, PA 8.T/8.I, PA 8.T/8.6, PA 8.T/6.I, PA 10.T/6.T, PA 10.T/6.6, PA 10.T/10.I, PA 10T/10.I/6.T, PA 10.T/6.I, PA 4.T/4.I/46, PA 4.T/4.I/6.6, PA 5.T/5.I, PA 5.T/5.I15.6, PA 5.T/5.I/6.6, PA 6.T/6.I/6.6, PA MXDA.6, PA IPDA.I, PA IPDA.T, PA MACM.I, PA MACM.T, PA PACM.I, PA PACM.T, PA MXDA.I, PA MXDA.T, PA 6.T/IPDA.T, PA 6.T/MACM.T, PA 6.T/PACM.T, PA 6.T/MXDA.T, PA 6.T/6.I/8.T/8.I, PA 6.T/6.I/10.T/10.I, PA 6.T/6.I/IPDA.T/IPDA.I, PA 6.T/6.I/MXDA.T/MXDA.I, PA 6.T/6.I/MACM.T/MACM.I, PA 6.T/6.I/PACM.T/PACM.I, PA 6.T/10.T/IPDA.T, PA 6.T/12.T/IPDA.T, PA 6.T/10.T/PACM.T, PA 6.T/12.T/PACM.T, PA 10.T/IPDA.T, PA 12.T/IPDA.T, and copolymers and mixtures thereof.

Assignees

• Basf Se

Inventors

• Zhu Ning
• Stammer Achim
• Clauss Joachim
• Kory Gad

Classifications

• C08F2/002

  Scale prevention in a polymerisation reactor or its auxiliary parts · CPC title

• C08G69/265

  from at least two different diamines or at least two different dicarboxylic acids · CPC title

• B01J19/1881

  externally, i.e. the mixture leaving the vessel and subsequently re-entering it · CPC title

• B01J2219/00094

  Jackets · CPC title

• C08G69/28

  Preparatory processes · CPC title