Apparatus for introduction of droplets of a monomer solution into a reactor

Patent metadata

Field	Value
Publication number	US-9925511-B2
Application number	US-201515320771-A
Country	US
Kind code	B2
Filing date	Jun 23, 2015
Priority date	Jun 23, 2014
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

An apparatus for introducing droplets of a monomer solution for production of poly(meth)acrylate into a reactor for droplet polymerization, comprising at least one channel or a dropletizer head, the channel or the dropletizer head being sealed at its base by a dropletizer plate, the dropletizer plate having holes through which the monomer solution is introduced into the reactor, and the dropletizer plate being configured such that holes that, in an axially symmetric dropletizer plate or in an annular dropletizer plate or in one configured as a ring segment, are not on a center line of the dropletizer plate or, in the case of a circular dropletizer plate, are not at the center of the dropletizer plate are aligned such that monomer solution is introduced through the holes into the reactor at an angle to the vertical, and the holes in the case of a radial alignment of axially symmetric dropletizer plates being aligned such that the angle at which the monomer solution is introduced into the reactor decreases in the direction of the axis of the reactor and, in the case of dropletizer plates arranged parallel to one another or of concentrically arranged dropletizer plates, each being aligned on a line parallel to the center line or line running concentrically about the center, such that the angle at which the monomer solution is introduced into the reactor is constant.

First claim

The invention claimed is:

1. An apparatus for introducing droplets of a monomer solution for production of poly(meth)acrylate into a reactor ( 1 ) for droplet polymerization, comprising at least one channel ( 25 ) or a dropletizer head, the channel ( 25 ) or the dropletizer head being sealed at its base by a dropletizer plate ( 26 ), the dropletizer plate ( 26 ) having holes through which the monomer solution is introduced into the reactor ( 1 ), and the dropletizer plate ( 26 ) being configured such that holes ( 35 ) that, in an axially symmetric dropletizer plate ( 26 ) or in an annular dropletizer plate or in one configured as a ring segment, are not on a center line of the dropletizer plate ( 26 ) or, in the case of a circular dropletizer plate, are not at the center of the dropletizer plate ( 26 ) are aligned such that monomer solution is introduced through the holes ( 35 ) into the reactor ( 1 ) at an angle to the vertical in the range from 0° to 30°, and the holes ( 35 ) in the case of a radial alignment of axially symmetric dropletizer plates ( 26 ) being aligned such that the angle at which the monomer solution is introduced into the reactor ( 1 ) decreases in the direction of the axis of the reactor ( 1 ) and, in the case of dropletizer plates ( 26 ) arranged parallel to one another or of concentrically arranged dropletizer plates, each being aligned on a line parallel to the center line or line running concentrically about the center, such that the angle at which the monomer solution is introduced into the reactor ( 1 ) is constant and is in a range from 0° to 30°.

2. The apparatus according to claim 1 , wherein at least two distributor arrangements each having at least two dropletizer plates ( 26 ) arranged in parallel to one another are arranged at an angle relative to one another so as to result in a multiangular pitch.

3. The apparatus according to claim 1 , wherein the decreasing angle at which the monomer solution is introduced into the reactor in the case of radial arrangement of the dropletizer plates ( 26 ) is obtained by virtue of a channel being sealed by at least two dropletizer plates ( 26 ) and the angle at which the monomer solution is dropletized into the reactor ( 1 ) being constant for each row of holes in a dropletizer plate ( 26 ), the angles being less in the dropletizer plates ( 26 ) disposed closer to the middle of the reactor ( 1 ) than the angles of the dropletizer plates ( 26 ) disposed further to the outside.

4. The apparatus according to claim 1 , wherein the angle at which the monomer solution is introduced into the reactor ( 1 ) in the case of a radial arrangement of the dropletizer plates ( 26 ) increases from the center of the reactor ( 1 ) outward in a dropletizer plate ( 26 ).

5. The apparatus according to claim 4 , wherein the angle α at which the monomer solution exits at least from the holes at the radial edges is within the range defined below:

r

N
LR

·

d
P

·

v
0.578

·

(

0.00697
·
r

+
0.0332

)

-
6.296

≤
α
≤

r

N
LR

·

d
P

·

v
0.578

·

(

0.00697
·
r

+
0.0332

)

+
4.704

,

for the range of validity

0.25
⁢

⁢
m

≤
r
≤

10
⁢

⁢
m

0.0001
⁢

⁢
m

≤

d
P

≤

0.0015
⁢

⁢
m

3
⁢

m
s

≤
v
≤

30
⁢

m
s

⁢

⁢
3

≤

N
LR

≤
18.

where r is the radial position of the hole in meters, N LR is the number of channels, d p is the mean droplet diameter in meters and v is the droplet exit velocity in meters per second.

6. The apparatus according to claim 1 , wherein holes along the center line running parallel to the axis of the channel ( 25 ) in a dropletizer plate ( 26 ) configured in an axially symmetric manner or as a ring or ring section, or at the center in a circular dropletizer plate, are aligned such that the monomer solution which is introduced through these holes drips vertically downward.

7. The apparatus according to claim 1 , wherein the dropletizer plates ( 26 ) have a profile angled along the central line thereof, a profile multiply angled symmetrically to the central line, or a profile in the form of a circle segment.

8. The apparatus according to claim 1 , wherein a plurality of channels ( 25 ) each having one or more drople

Assignees

• Basf Se

Inventors

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

Classifications

• B01J19/06 Primary

  Solidifying liquids (making microcapsules B01J13/02) · CPC title

• B01J19/24

  Stationary reactors without moving elements inside (B01J19/08, B01J19/26 take precedence; with stationary particles B01J8/02) · CPC title

• B01J2208/00938

  Flow distribution elements · CPC title

• B01J4/004

  Sparger-type elements · CPC title

• B01J8/1818 Primary

  Feeding of the fluidising gas (B01J8/44 takes precedence) · CPC title