Process for producing at least one pyrogenic compound and burner suitable for use in said process

Patent metadata

Field	Value
Publication number	US-2024359995-A1
Application number	US-202418644962-A
Country	US
Kind code	A1
Filing date	Apr 24, 2024
Priority date	Apr 25, 2023
Publication date	Oct 31, 2024
Grant date	—

Abstract

A process for producing at least one pyrogenic compound can be performed. A burner suitable for use in said process has at least four concentric tubes, where a second tube is arranged around the central tube. A process for making the burner can be performed, and a production facility that has at least one burner can be made.

First claim

1 . A process for producing at least one pyrogenic compound selected from the group consisting of metal oxide, metalloid oxide and mixtures of the aforementioned, the process comprising:
burning at least one precursor compound selected from the group consisting of metal oxide precursor and metalloid oxide precursor, the process employing at least one burner wherein the at least one burner comprises a tube system, said tube system comprising at least 4 concentric tubes wherein a second tube is arranged around a central tube, a third tube is arranged around the second tube, and a fourth tube is arranged around the third tube, and wherein the at least one precursor compound is fed through at least two tubes that are separated from each other by at least one other tube and wherein an oxygen containing gas stream is fed through at least one tube not being used to feed the at least one precursor compound.

2 . The process according to claim 1 , wherein water is fed through at least one tube of the tube system.

3 . The process according to claim 1 , wherein the at least one burner comprises at least one jacket arranged around the tube system.

4 . The process according to claim 1 , wherein the at least 4 tubes end in a plane.

5 . The process according to claim 1 , wherein a surface area of an opening of any tube being closer to a central axis of the tube system is smaller or the same as the surface area of the opening of any tube being located further away from said axis.

6 . The process according to claim 1 , wherein a cross-section of the at least 4 tubes is round-shaped.

7 . The process according to claim 1 , wherein the at least one tube used to feed the oxygen-containing gas stream is located between the at least two tubes being used to feed the at least one precursor compound.

8 . The process according to claim 1 , wherein a fuel gas is fed through at least one tube, wherein said tube is not used to feed oxygen-containing gas stream.

9 . The process according to claim 1 , wherein a cross-section area at an opening of the burner perpendicular to the central axis of the at least one burner, of each concentric tube, constitutes from 1% to 30% of the total cross-section area of all concentric tubes of the burner.

10 . The process according to claim 1 , wherein water is fed through at least one tube not being used to feed the at least one precursor compound and that a molar ratio of water to the at least one precursor compound used in the at least one burner is at least 0.1.

11 . The process according to claim 1 , wherein the at least one precursor compound and optionally, the fuel gas are fed through the central tube;
the oxygen and optionally, water are fed through the second tube; the precursor compound and optionally, the fuel gas are fed through the third tube; the oxygen and optionally, water are fed through the fourth tube.

12 . A burner suitable for use in a process according to claim 1 , wherein
the burner comprises a tube system, said tube system comprising at least 4 concentric tubes wherein a second tube is arranged around a central tube, a third tube is arranged around the second tube, and a fourth tube is arranged around the third tube.

13 . The burner according to claim 12 , wherein the at least 4 tubes are inclined from the opening of each of the tubes to the interior of the burner.

14 . A production facility suitable for carrying out the process according to claim 1 , wherein the production facility comprises at least one burner and at least one feeding device for the at least one precursor compound.

15 . The process according to claim 2 , wherein the oxygen containing gas stream is fed in one tube together with the water.

16 . The process according to claim 3 , wherein no precursor compound is fed through the outermost tube of the burner or the jacket.

17 . The process according to claim 4 , wherein the plane is arranged in an angle of 90°±10° in relation to a central axis of the tube system.

18 . The process according to claim 6 , wherein the cross section of the at least 4 tubes is circular.

19 . The process according to claim 8 , wherein the fuel gas is at least one selected from the group consisting of hydrogen, methane, ethane, propane, and acetylene.

20 . The process according to claim 10 , wherein the molar ratio of water to the at least one precursor compound used in the burner is in a range from 0.3 to 5.0.

Assignees

• Evonik Operations Gmbh

Inventors

• Schmidt Franz
• Gumprecht Andreas
• Podapaka Maninadh
• Schaack Senada
• Müller Michael
• Schilling Roland
• Ihmig Ronald
• Yilmaz Nuh
• Erz Joachim
• Katerinak Witold
• Lygin Alexander

Classifications

• F23D99/004

  for use in particular heating operations · CPC title

• C01B13/18

  by thermal decomposition of compounds, e.g. of salts or hydroxides · CPC title

• B01J6/008 Primary

  Pyrolysis reactions (of hydrocarbons C10G9/00) · CPC title

• B01J2219/00157

  by means of a burner · CPC title

• C01P2006/12

  Surface area · CPC title