Method of inductively igniting a chemical reaction

A technology of reaction and phase reaction, applied in chemical instruments and methods, chemical methods for reacting gas medium with gas medium, inorganic chemistry, etc., can solve problems such as incomplete reliability

Inactive Publication Date: 2003-07-02
INVISTA TECHNOLOG IES S A R L
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method of igniting the reaction has not proven to be entirely reliable, and it is to this problem that the present invention addresses

Method used

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  • Method of inductively igniting a chemical reaction
  • Method of inductively igniting a chemical reaction
  • Method of inductively igniting a chemical reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] A laboratory scale 2 inch (5.08 cm) diameter quartz reactor was fabricated and tested for the purpose of evaluating the practicality of igniting reactions with built-in copper inductors. The reactor consists of a single coil of copper, a 3 / 16 inch (0.476 cm) thick ceramic foam catalyst support, 40 layers of platinum mesh and a final 3 / 16 inch (0.476 cm) thick ceramic foam catalyst support . The induction frequency is 26MHz. Several tests were carried out in order to evaluate the ignition, power input and to check whether the presence of copper rings inside the reaction chamber had a negative effect, with the following results:

[0044] Flow Ignition NH 3 CH 4 Air power time 1.26L / min 1.16L / min 6.67L / min 200Watts ~85sec.1.26L / min 1.16L / min 6.67L / min 250Watt ~40sec.1.26L / min 1.16L / min 6.67L / min 300Watts ~20sec .1.26L / min 1.16L / min 6.67L / min 350Watts ~10sec.

[0045] As can be seen from the table above, ignition is achieved in about 10 sec...

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Abstract

An improved method of igniting a catalyzed gas phase chemical reaction involving the act of providing a reactor vessel (10), wherein the gaseous reactant, continuously passing through the reactor, makes contact with a solid phase metallic catalyst media (18), with an inductive coil (14) within the reactor (10) on the inlet side of the catalyst and a porous thermal, spark and radiation barrier (17) between the induction coil (14) and solid catalyst (18). According to the improved method of ignition, the metallic catalyst media (18) is inductively heated in order to ignite the chemical reaction and after ignition the inductive heating is suspended and the exotherm of the chemical reaction is thereafter relied upon to sustain the reaction temperature. Such a reactor and method of operation is particularly useful for continuous production of hydrogen cyanide by the Andrussow process.

Description

field of invention [0001] The present invention relates to a new method for igniting gas-phase chemical reactions in the presence of solid catalysts. More specifically, the present invention relates to, but is not limited to, a continuous flow gas phase reaction in which ammonia reacts with hydrocarbons in the presence of oxygen and a platinum group metal catalyst to form hydrogen cyanide, using induction Loop induction heating of metal catalysts and ignition of exothermic reactions. technical background [0002] The concept of using induction heating to heat catalysts during elevated temperature gas phase chemical reactions is well known in the art. For example, US Patent No. 5,110,996 discloses a process for the production of vinylidene fluoride in which dichlorofluoromethane is reacted with methane in an induction heated reaction tube containing a non-metallic filler and optionally a metal catalyst. [0003] Similarly, PCT patent application WO 95 / 21126 discloses the re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/04B01J8/02B01J12/00B01J19/08C01C3/02
CPCC01C3/0212B01J2219/32466B01J2219/1946C01C3/0225B01J2208/00415B01J12/007B01J8/0285B01J19/087B01J2208/00407B01J2208/00398
Inventor T·A·科克M·梅迪扎德D·J·比克
Owner INVISTA TECHNOLOG IES S A R L
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