Apparatus and process for the preparation of acetylene and synthesis gas

Patent metadata

Field	Value
Publication number	US-10059640-B2
Application number	US-201515129094-A
Country	US
Kind code	B2
Filing date	Mar 25, 2015
Priority date	Mar 26, 2014
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

An apparatus ( 10 ) for the preparation of acetylene and synthesis gas by partial oxidation of hydrocarbons with oxygen is proposed. The apparatus ( 10 ) comprises a reactor ( 12 ), wherein the reactor ( 12 ) comprises a burner block ( 14 ) with a furnace chamber for the preparation of a composition C1 comprising at least acetylene and substituted acetylene, a first scrubber ( 22 ) which is constructed for adding a solvent to the composition C1 to obtain a composition C2, a second scrubber ( 26 ) which is constructed for adding the solvent to the composition C2 to obtain a composition C3, a first stripper ( 36 ) which is constructed for stripping the composition C3 to obtain a composition C4 comprising the substituted acetylene, acetylene and the solvent and for separating off the acetylene, a first column ( 46 ) which is constructed for partial degassing of the composition C4 under a pressure of from 1.0 bar to 1.5 bar to obtain a composition C5 and a first amount A1 of the solvent, a second stripper ( 56 ) to which the composition C5 can be fed for stripping a composition C9 to obtain a second amount A2 of the solvent and a composition C6, a third stripper ( 68 ) which is constructed for stripping the solvent from the first scrubber ( 22 ) to obtain a composition C9, wherein the third striper ( 68 ) is connected to the second stripper ( 56 ) for feeding the composition C9 to the second stripper ( 56 ), an apparatus ( 72 ) for adding a diluting gas to the composition C5, which is arranged between the first column ( 46 ) and the second stripper ( 56 ), a second column ( 76 ) which is constructed for adding water to the composition C6 to obtain a composition C7 comprising a third amount A3 of the solvent and water and to obtain a composition C8 comprising the substituted acetylene, and a mixing condenser ( 82 ) which is constructed for adding water to the composition C8 to obtain a composition C11 comprising the substituted acetylene.
A process for the preparation of acetylene and synthesis gas by partial oxidation of hydrocarbons with oxygen is further proposed.

First claim

The invention claimed is:

1. An apparatus for preparation of acetylene and synthesis gas by partial oxidation of hydrocarbons with oxygen, comprising:
a reactor, wherein the reactor comprises a burner block with a furnace chamber for the preparation of a composition C1 comprising at least acetylene and substituted acetylene;
a first scrubber which is constructed for adding a solvent to the composition C1 to obtain a composition C2;
a second scrubber which is constructed for adding a solvent to the composition C2 to obtain a composition C3;
a first stripper which is constructed for stripping the composition C3 to obtain a composition C4 comprising the substituted acetylene, acetylene and the solvent and for separating off the acetylene;
a first column which is constructed for partial degassing of the composition C4 under a pressure of from 1.0 bar to 1.5 bar to obtain a composition C5, a composition C10 and a first amount A1 of the solvent;
a second stripper to which the composition C5 can be fed for stripping a composition C9 to obtain a second amount A2 of the solvent and a composition C6;
a third stripper which is constructed for stripping the solvent from the first scrubber to obtain a composition C9, the third stripper being connected to the second stripper for feeding the composition C9 to the second stripper,
wherein an apparatus for adding a diluting gas to the composition C5 is arranged between the first column and the second stripper;

a second column which is constructed for adding water to the composition C6 to obtain a composition C7 comprising a third amount A3 of the solvent and water and to obtain a composition C8 comprising the substituted acetylene; and
a mixing condenser which is constructed for adding water to the composition C8 to obtain a composition C11 comprising the substituted acetylene.

2. The apparatus as claimed in claim 1 , wherein the diluting gas is selected from the group consisting of: H 2 , N 2 , CO 2 , NH 3 , lean gas, and natural gas.

3. The apparatus as claimed in claim 1 , wherein the second amount A2 of the solvent obtained from the second stripper can be fed to the first and/or second scrubber.

4. The apparatus as claimed in claim 1 , wherein the first content A1 of the solvent obtained from the first column can be fed to the first and/or second scrubber.

5. The apparatus as claimed in claim 1 , wherein the first column has a side take-off for leading off the composition C5, wherein the apparatus for adding a diluting gas to the composition C5 is adjacent to the side take-off.

6. The apparatus as claimed in claim 1 , wherein a temperature is established in the mixing condenser for preventing a precipitation of naphthalene.

7. The apparatus as claimed in claim 6 , wherein the tee temperature in the mixing condenser is from 40° C. to 80° C.

8. The apparatus as claimed claim 1 , wherein the second stripper for degassing the composition C9 can be operated under a pressure of from 1.0 bar to 1.4 bar.

9. The apparatus as claimed in claim 1 , wherein the solvent is N-methyl-2-pyrrolidone.

10. A process for preparing acetylene and synthesis gas by partial oxidation of hydrocarbons with oxygen, the process comprising:
partially oxidizing hydrocarbons with oxygen for the preparation of a composition C1 comprising at least acetylene and substituted acetylene;
adding a solvent to the composition C1 to obtain a composition C2;
adding the solvent to the composition C2 to obtain a composition C3;
stripping of the composition C3 to obtain a composition C4 comprising the substituted acetylene, acetylene and the solvent and to separate off the acetylene from the composition C3;
partial degassing of the composition C4 under a pressure of from 1.0 bar to 1.5 bar to obtain a composition C5, a composition C10 and a first amount A1 of the solvent;
stripping of a composition C9 with the composition C5 to obtain a second amount A2 of the solvent and a composition C6;
stripping of the solvent obtained after preparation of the composition C2 to obtain the composition C9;
adding a diluting gas to the composition C5;
adding water to the composition C6 to obtain a composition C7 comprising a third amount A3 of the solvent and water and to obtain a composition C8 comprising the substituted acetylene; and
adding water to the composition C8 to obtain a composition C11 comprising the substituted acetylene.

11. The process as claimed in claim 10 , wherein the diluting gas is selected from the group consisting of: H 2 , N 2 , CO 2 , NH 3 , lean gas, and natural gas.

12. The process as claimed in claim 10 , wherein the second amount A2 of the solvent obtained is fed to the composition C1 and/or C2.

13. The process as claimed in claim 10 , wherein the first amount A1 of the solvent obtained is fed to the composition C1 and/or C2.

14. The process as claimed in claim 10 , wherein the water is added to the composition C8 in a mixing condenser, wherein a temperature is established in the mixing condenser for preventing a precipitation of naphthalene.

15. The process as claimed in claim 14 , wherein the temperature is from 40° C. to 80° C.

16. The process as claimed in claim 10 , wherein the composition C9 is degassed under a pressure of from 1.0 bar to 1.4 bar.

17. The process as claimed in claim 10 , wherein the solvent is N-methyl-2-pyrrolidone.

Assignees

• Basf Se

Inventors

• Vicari Maximilian
• Britzius Susanne
• Kara-Hippen Lilian
• Russ Michael
• Kern Matthias
• Weichert Christian

Classifications

• C07D207/267

  with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to the ring nitrogen atom · CPC title

• B01D3/14

  Fractional distillation {or use of a fractionation or rectification column} · CPC title

• C07C2/78 Primary

  Processes with partial combustion · CPC title

• C07C15/58

  containing two rings · CPC title

• C01B3/363

  characterised by the burner · CPC title