# US 2008/0188698 A1 · Method and Device for Producing Acetylene and Synthesis Gas by Rapidly Mixing the Reactants

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- Number: US 2008/0188698 A1
- Document ID: US20080188698A1
- Status: Published application
- Kind: A1
- Application number: 11/910,996
- Filed: 2006-04-21
- Published: 2008-08-07
- Earliest claimed: 2005-04-23
- Assignees: BASF SE
- Inventors: Bernd Bartenbach; Kai Rainer Ehrhardt; Arne Hoffmann; Frank Kleine Jager
- Web page: https://patentgrep.com/patent/US20080188698A1

## CPC

- B01J 4/002: {Nozzle-type elements (nozzle-type reactors B01J19/26)}
- B01J 19/2405: {provoking a turbulent flow of the reactants, such as in cyclones, or having a high Reynolds-number}
- B01J 19/26: Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
- C01B 3/363: characterised by the burner
- C07C 2/78: Processes with partial combustion
- B01J 2219/00157: by means of a burner
- C01B 2203/0255: containing a non-catalytic partial oxidation step
- C01B 2203/1241: Natural gas or methane
- C01B 2203/1276: Mixing of different feed components
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

A process for the preparation of acetylene and synthesis gas by partial thermal oxidation in a reactor which has a burner having passages, wherein the starting materials to be reacted are rapidly and completely mixed only immediately before the flame reaction zone in the passages of the burner, a mean flow rate which exceeds the flame propagation velocities under the given reaction conditions being established in the mixing zone within the passages.

## Claims

### Claim 1

A process for the preparation of acetylene and synthesis gas by partial thermal oxidation in a reactor comprising a burner having passages, wherein the process comprises rapid and complete mixing of starting materials, to be reacted in a flame reaction zone, in a mixing zone located within the passages of the burner only immediately prior to entry into the flame reaction zone, wherein a mean flow rate, which exceeds flame propagation velocities, is established within the mixing zone.

### Claim 2 (depends on 1)

The process according to claim 1, wherein one or more ignition burners which ignite a main reaction within the burner are introduced into a diffuser which is upstream of the burner and through which one of the starting materials is fed to the burner.

### Claim 3 (depends on 1)

The process according to claim 1, wherein byproduct streams leaving the reactor are recycled to the reactor and mixed with a hydrocarbon before entry into the burner.

### Claim 4 (depends on 3)

The process according to claim 3, wherein the recycled byproduct stream is further mixed with oxygen before entry into the burner.

### Claim 5 (depends on 1)

The process according to claim 1, wherein hydrocarbon mixtures, other than natural gas, are mixed, in proportions of more than 10% by volume, with natural gas before entry into the burner.

### Claim 6 (depends on 1)

The process according to claim 1, wherein hydrocarbon mixtures, other than natural gas, are selected from methane ethane, ethylene, propane, and butane.

### Claim 7 (depends on 1)

An apparatus for carrying out the process according to claim 1, wherein the apparatus comprises a conventional burner, for acetylene preparation, supplemented with an intermediate flange, and a mixing device that permits mixing of the starting materials in the passages of the burner.

### Claim 8 (depends on 7)

The apparatus according to claim 7, further comprising an annular gap for transitioning of the flame reaction zone into a quench zone.

### Claim 9 (depends on 3)

The process according to claim 3, wherein the byproduct streams leaving the reactor comprise hydrogen.

### Claim 10 (depends on 5)

The process according to claim 5, wherein hydrocarbon mixtures, other than natural gas, are mixed, in proportions of more than 20% by volume, with natural gas before entry into the burner.

### Claim 11 (depends on 5)

The process according to claim 5, wherein hydrocarbon mixtures, other than natural gas, are mixed before entry into a preheater for preheating the starting materials.

### Claim 12 (depends on 11)

The process according to claim 11, wherein hydrocarbon mixtures, other than natural gas, are selected from liquefied gas, saturated hydrocarbons, and unsaturated hydrocarbons, which are gaseous at preheating temperatures of the preheater.