Apparatus for addition of droplets of a monomer solution to a reactor

Patent metadata

Field	Value
Publication number	US-10150091-B2
Application number	US-201515320776-A
Country	US
Kind code	B2
Filing date	Jun 16, 2015
Priority date	Jun 23, 2014
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

An apparatus for addition of droplets of a monomer solution for production of poly(meth)acrylate to a reactor for droplet polymerization, comprising at least one channel or a dropletizer head having, at its base, holes through which the solution is dropletized into the reactor, at least one of the following features being fulfilled:
(a) the ratio of the area covered by the channels or the dropletizer head in the reactor relative to the area which is defined by the circumference of a line along the outermost holes is less than 50%, (b) the number of holes relative to the area which is defined by the circumference of a line along the outermost holes is within a range from 100 to 1000 holes/m 2 .

First claim

The invention claimed is:

1. An apparatus for addition of droplets of a monomer solution for production of poly(meth)acrylate to a reactor ( 1 ) for droplet polymerization, comprising at least one channel ( 24 , 25 ) or a dropletizer head having, at its base, holes ( 35 ) through which the solution is dropletized into the reactor ( 1 ), at least one of the following features (a) and (b) being fulfilled:
(a) the ratio of the area covered by the channels ( 24 , 25 ) or the dropletizer head in the reactor ( 1 ) relative to the area which is defined by the surface within a circumferential line of the channels ( 24 , 25 ) or the dropletizer head which connects the outermost holes is less than 50%,
(b) the number of holes ( 35 ) relative to the area which is defined by the circumference of a line along the outermost holes is within a range from 100 to 1000 holes/m 2 ,

and wherein the dropletizer head is or the dropletizer plates ( 26 ) are configured such that the holes are aligned such that the liquid exits from the holes ( 35 ) at an angle to the axis of the reactor.

2. The apparatus according to claim 1 , wherein the channels ( 24 , 25 ) are sealed at their base by dropletizer plates ( 26 ) in which the holes ( 35 ) for dropletization of the solution are accommodated.

3. The apparatus according to claim 1 , wherein the channels ( 25 ) are arranged in a star shape in the reactor.

4. The apparatus according to claim 1 , wherein the channels ( 24 , 25 ) are arranged in a rotationally symmetric manner about the center of the reactor ( 1 ), the channels each projecting into the reactor ( 1 ) to different extents from the outer wall in the direction of the center of the reactor ( 1 ).

5. The apparatus according to claim 1 , wherein a plurality of parallel channels ( 25 ) in each case are aligned transverse to one another.

6. The apparatus according to claim 1 , wherein at least one annular channel is included.

7. The apparatus according to claim 1 , wherein the dropletizer head has a circular or homogeneous polygonal cross section.

8. The apparatus according to claim 1 , wherein the holes ( 35 ) have a diameter in the range from 25 to 500 μm.

9. The apparatus according to claim 1 , wherein the holes ( 35 ) have a distance from one another in the range from 1 to 100 mm.

10. The apparatus according to claim 1 , wherein the number of holes relative to the area of the dropletizers is in the range from 1000 to 15 000 holes/m 2 .

Assignees

• Basf Se

Inventors

• Daiss Andreas
• Bayer Robert
• Schliwa Rudolf
• Freiberg Jürgen
• Possemiers Karl J
• Krüger Marco

Classifications

• C08F2/01

  characterised by special features of the polymerisation apparatus used · CPC title

• C08F120/14

  Methyl esters {, e.g. methyl (meth)acrylate} · CPC title

• B01J4/001 Primary

  Feed or outlet devices as such, e.g. feeding tubes · CPC title

• B01J2219/00247

  Fouling of the reactor or the process equipment · CPC title

• B01J2204/002

  the feeding side being of particular interest · CPC title