Inductively heated catalytic reactor

A technology of reaction vessel and phase reaction, applied in the reaction of gas and gas under catalytically active bodies, chemical instruments and methods, chemical/physical/physicochemical processes of energy application, etc., can solve the problem of increasing side reaction products and structural materials Difficult design, lower conversion, etc.

Inactive Publication Date: 2000-08-02
INVISTA TECHNOLOG IES S A R L
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In principle, problems are encountered when the size of the reactor is enlarged. These problems are particularly important for temperature-sensitive reactions. The problems may manifest themselves in one or more of the following: reduced conversion of desired products, increased undesired side reaction products , and / or less than optimum selectivity
In addition, the structural materials of the reactor will encounter obvious difficulties in the process of design and scale-up

Method used

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Examples

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example 1-4

[0026] HCN was prepared by reacting a slight molar excess of ammonia and methane in a continuous-flow fixed-bed reactor using the method shown in figure 1 The flat ring is heated by induction. The ratios of ammonia and methane are shown in Table 1. The reactor is essentially a quartz cylinder with a diameter of 5.0 cm and a length of 20 cm, with appropriate fittings to connect the feed conduits and the product output unit. The catalyst consisted of 20 pieces of metal mesh of 80 mesh and 90% by weight of platinum and 10% by weight of rhodium with a thickness of 0.4 mm. Heating of the catalyst bed is accomplished by coupling energy from an energy source to the main coils within the reactor. The reactor feed system is designed to allow a constant flow of the two gaseous materials into the reaction zone. The gas flow was monitored with a Brook(R) mass flow controller. Product identification and quantitative analysis using gas chromatography. Induction heat is supplied at a cons...

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Abstract

An improved gas phase reactor (10) for continuously conducting a catalyzed chemical reaction at elevated temperature involving a reactor vessel (11) wherein the gaseous reactant passing through the reactor makes contact with an inductively heated solid phase catalyst media (17). By placing the induction coil (14) used to inductively heat the catalyst (17) directly within the reactor in close proximity to the solid catalyst improved temperature control and uniform heating of the catalyst is achieved. Such a reactor is particularly useful for continuous production of hydrogen cyanide.

Description

technical field [0001] The present invention relates to a new equipment for gas-phase reaction in the presence of a solid catalyst at elevated temperature. More specifically, the present invention relates to continuous flow gas phase reactors in which metal catalysts are heated inductively using induction coils in the reactor. Background of the invention [0002] The concept of using induction heating to raise the temperature of a catalyst during an elevated temperature gas phase chemical reaction is generally known in the art. For example, US Patent No. 5,110,996 discloses a process for the production of vinylidene fluoride by reacting dichlorofluoromethane with methane in an induction heated reaction tube containing a non-metallic filler and optionally a metal catalyst. [0003] Likewise, PCT patent application WO 95 / 21126 discloses the preparation of hydrogen cyanide by reacting ammonia with gaseous hydrocarbons in an induction heated quartz reaction tube. In this paten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/00B01J8/02B01J12/00B01J19/08B01J19/12C01C3/02
CPCC01C3/0216B01J12/007B01J2208/00415C01C3/0212B01J2219/1946B01J19/087C01C3/0225B01J2219/32466B01J8/0285B01J2208/00407B01J2208/00398
Inventor T·A·科克M·梅蒂扎德J·W·阿斯梅德B·E·布拉克维尔G·S·基尔拜S·K·森古普塔
Owner INVISTA TECHNOLOG IES S A R L
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