Vessel for separating components of a reaction mixture obtained by high-pressure polymerization of ethylenically unsaturated monomers with integrated bursting discs

Patent metadata

Field	Value
Publication number	US-9637569-B2
Application number	US-201415106150-A
Country	US
Kind code	B2
Filing date	Dec 15, 2014
Priority date	Dec 19, 2013
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

The present disclosure relates to a vessel for separating, at a pressure of from 10 MPa to 50 MPa, a composition comprising liquid components and gaseous components into a liquid fraction and a gaseous fraction, wherein
the separation vessel has a vertically arranged cylindrical shape, has at its top a manhole, which is surrounded by a thickened by a part of the separation vessel wall; and bears at least one bursting disc which is held by a bursting disc holder which is installed pressure-tight within a boring in the thickened part of the separation vessel wall.

First claim

What is claimed is:

1. A vessel for separating, at a pressure of from 10 MPa to 50 MPa, a composition comprising liquid components and gaseous components into a liquid fraction and a gaseous fraction, wherein
the separation vessel has a cylindrical shape and is vertically arranged,
the separation vessel has at its top a manhole, which is surrounded by a thickened part of the separation vessel wall;
the separation vessel is equipped with an inlet pipe for introducing the composition into the separation vessel, with a boring for withdrawing a gaseous fraction from the top of the separation vessel, and with an outlet for withdrawing a liquid fraction from the bottom of the separation vessel; and
the separation vessel comprises at least one bursting disc which is held by a bursting disc holder which is installed pressure-tight within a boring in the thickened part of the separation vessel wall.

2. The vessel according to claim 1 , wherein the bursting disc holder is vertically installed in the thickened part of the separation vessel wall.

3. The vessel according to claim 1 , wherein the bursting disc holder is fixed to the separation vessel wall by flange connection from the outside.

4. The vessel according to claim 1 , wherein the bursting disc is arranged at the inner end of the boring in the thickened part of the separation vessel wall in a way that the surface of the bursting disc assembly in contact with the gaseous fraction within the separation vessel and the wall surface of the manhole are arranged in one plane.

5. The vessel according to claim 1 , wherein the separation vessel has an L/D ratio of from 4 to 10.

6. A process for separating, at a pressure of from 10 MPa to 50 MPa, a composition comprising liquid components and gaseous components into a liquid fraction and a gaseous fraction, wherein the separation is carried out in a separation vessel according to claim 1 .

7. The process according to claim 6 , wherein the separation is carried out at a temperature of from 120° C. to 300° C.

8. The process according to claim 6 , wherein the composition is a reaction mixture obtained by polymerizing ethylenically unsaturated monomers in the presence of free-radical polymerization initiators at temperatures from 100° C. to 350° C. and pressures in the range of from 110 MPa to 500 MPa.

9. A process for preparing ethylene homopolymers or copolymers from ethylenically unsaturated monomers in the presence of free-radical polymerization initiators at temperatures from 100° C. to 350° C. and pressures in the range of from 110 MPa to 500 MPa in a polymerization reactor, wherein the separation of the reaction mixture obtained by the polymerization is carried out in a separation vessel according to claim 1 .

10. The process according to claim 9 , wherein the separation is the first separation of the reaction mixture obtained by the polymerization and the separation is carried out at a pressure of from 10 MPa to 50 MPa and a temperature of from 120° C. to 300° C.

11. The process according to claim 9 , wherein the polymerization is carried out in one or more tubular reactors or autoclave reactors or combinations of such reactors.

Assignees

• Basell Polyolefine Gmbh

Inventors

• Neumann Erich
• Khayrullin Danir
• Fibla Claudio

Classifications

• B01J3/002 Primary

  Component parts of these vessels not mentioned in B01J3/004, B01J3/006, B01J3/02 - B01J3/08; Measures taken in conjunction with the process to be carried out, e.g. safety measures · CPC title

• C08F6/10 Primary

  Removal of volatile materials, e.g. solvents {(C08F6/001, C08F6/003, C08F6/005, C08F6/006, C08F6/008, C08F6/02, C08F6/04 take precedence)} · CPC title

• B01J2219/1946

  conical · CPC title

• B01D19/0036

  Flash degasification (the other groups take precedence) · CPC title

• B01J19/2415

  Tubular reactors · CPC title