Conveying a fluid containing a (meth)acrylic monomer by means of a pump

Patent metadata

Field	Value
Publication number	US-12516675-B2
Application number	US-202118034889-A
Country	US
Kind code	B2
Filing date	Nov 2, 2021
Priority date	Nov 3, 2020
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

The present invention relates to a method for transporting a liquid F by means of a pump P, wherein the liquid F comprises at least 10% by weight of a (meth)acrylic monomer, the pump P has a pump space (3), the pump space (3) comprises at least one transport element (4) for transporting the liquid F, the transport element (4) is connected to a drive shaft (6) in such a way that the drive shaft (6) can transmit a torque to the transport element (4), the mounting of the drive shaft is effected by means of at least two sliding bearings (5) in the pump space (3) and the sliding bearings (5) are composed of tungsten carbide.

First claim

The invention claimed is:

1 . A method for transporting a liquid F by means of a pump P, where the liquid F comprises at least 10% by weight of a (meth)acrylic monomer, the pump P has a pump space, the pump space comprises at least one transport element for transporting the liquid F, the liquid F is fed into the pump space with an entry energy, the liquid F leaves the pump space with an exit energy which is greater than the entry energy, the transport element is connected to a drive shaft in such a way that the drive shaft can transmit a torque to the transport element, and the mounting of the drive shaft is effected by means of at least two sliding bearings in the pump space, wherein the sliding bearings are composed of tungsten carbide.

2 . The method according to claim 1 , wherein the liquid F comprises at least 60% by weight of a (meth)acrylic monomer.

3 . The method according to claim 1 , wherein the liquid F comprises at least 90% by weight of a (meth)acrylic monomer.

4 . The method according to claim 1 , wherein the (meth)acrylic monomer is acrylic acid, methyl acrylate, ethyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate, 4-hydroxybutyl acrylate or cyclohexyl acrylate.

5 . The method according to claim 1 , wherein a temperature of the liquid F is from 10 to 120° C.

6 . The method according to claim 1 , wherein a temperature of the liquid F is from 50 to 90° C.

7 . The method according to claim 1 , wherein the liquid F comprises a polymerization inhibitor.

8 . The method according to claim 7 , wherein the polymerization inhibitor is hydroquinone monomethyl ether, phenothiazine, 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl, hydroquinone or N,N′-di-sec-butyl-p-phenylenediamine.

9 . The method according to claim 1 , wherein the liquid F comprises from 0.001 to 1% by weight of a polymerization inhibitor.

10 . The method according to claim 1 , wherein the liquid F comprises from 0.01 to 0.1% by weight of a polymerization inhibitor.

11 . The method according to claim 1 , wherein force transmission to the drive shaft is effected by means of a magnetic coupling or a canned motor.

12 . A pump P with liquid F, wherein the liquid F comprises at least 10% by weight of a (meth)acrylic monomer, the pump P has a pump space, the pump space comprises at least one transport element for transporting the liquid F, the liquid F is fed into the pump space with an entry energy, the liquid F leaves the pump space with an exit energy which is greater than the entry energy, the transport element is connected to a drive shaft so that the drive shaft can transmit a torque to the transport element, mounting of the drive shaft is effected by means of at least two sliding bearings in the pump space and the sliding bearings are composed of tungsten carbide.

13 . The pump P according to claim 12 , wherein the transmission of force to the drive shaft is effected by means of a magnetic coupling or a canned motor.

14 . The method of using of a pump P for transporting a liquid F, wherein the liquid F comprises at least 10% by weight of a (meth)acrylic monomer, the pump P has a pump space, the pump space comprises at least one transport element for transporting the liquid F, the liquid F is fed into the pump space with an entry energy, the liquid F leaves the pump space with an exit energy which is greater than the entry energy, the transport element is connected to a drive shaft so that the drive shaft can transmit a torque to the transport element, mounting of the drive shaft is effected by means of at least two sliding bearings in the pump space and the sliding bearings are composed of tungsten carbide.

15 . The method of using according to claim 14 , wherein the transmission of force to the drive shaft is effected by means of a magnetic coupling or a canned motor.

Assignees

• Basf Se

Inventors

• Gieshoff Tile
• Schroeder Juergen
• Hammon Ulrich
• Rein Christian

Classifications

• F04D29/628

  especially adapted for liquid pumps · CPC title

• F04D29/061

  especially adapted for liquid pumps · CPC title

• F04D13/0606

  Canned motor pumps · CPC title

• F04D29/126

  especially adapted for liquid pumps · CPC title

• F04D13/0633

  Details of the bearings · CPC title