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Process for the preparation of hydrogen cyanide

A hydrogen cyanide and catalyst bed technology, applied in the preparation/purification/separation of hydrogen cyanide, chemical instruments and methods, cyanide, etc., can solve problems related to gas reactivity

Active Publication Date: 2017-11-17
INVISTA TEXTILES (U K) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when prior mixing of reactive gases is performed, there may be risks associated with the reactivity of the gases

Method used

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  • Process for the preparation of hydrogen cyanide
  • Process for the preparation of hydrogen cyanide
  • Process for the preparation of hydrogen cyanide

Examples

Experimental program
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Effect test

example 1

[0088] Such as figure 2 as shown in Figure 3A-3B A flow straightener with four radial plates and a pyramid-shaped center is shown positioned upstream of the static mixing zone in the mixing vessel (i.e. upstream of the tab inserts in the static mixing zone) and the annular inlet for the oxygen-containing gas downstream. The mixing vessel had a diameter of 25.4 cm and a length of 214.4 cm. A second flow straightener, also having four radial plates and a pyramid-shaped intermediate body, is arranged in the mixing vessel upstream of the second static mixing zone and downstream of the methane gas and ammonia gas inlets. Each flow corrector is 10.2 cm high and 0.95 cm thick. Each flow corrector was constructed from 310SS and had a circular ring welded to the inside of the mixing vessel. Flow correctors stop swirling flow that promotes poor mixing. The pyramid-shaped intermediate blocks the middle of the mixing vessel, thereby preventing the reactant gases from flowing throug...

example 2

[0090] The mixing vessel was run under similar conditions as in Example 1, except that each flow corrector had Figure 4A The conical intermediate shown in / 4B. This flow corrector achieves the same effect as Example 1.

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Abstract

The invention provides a method for preparing hydrogen cyanide, which belongs to the field of hydrogen cyanide preparation. The method comprises: (a) directing methane-containing gas, ammonia-containing gas, oxygen-containing gas, and mixtures thereof into an elongated conduit to form the gas mixture; (b) using a flow corrector to correct the flow of the gas mixture to form A ternary gas mixture, wherein the flow corrector comprises one or more radial plates mounted to an intermediate body, wherein the one or more radial plates extend longitudinally in the elongated duct, and the intermediate body is drawn from an upstream point grading outward toward the downstream base; and (c) contacting the ternary gas mixture with the catalyst in the catalyst bed to provide a reaction product comprising hydrogen cyanide. The method according to the invention increases the yield of hydrogen cyanide.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Application 61 / 738,740, filed December 18, 2012, the entire content and disclosure of which is incorporated herein. technical field [0003] The present invention relates to a process for the production of hydrogen cyanide, and in particular to a flow corrector for correcting the flow of a ternary gas in a mixer. Background technique [0004] Traditionally, hydrogen cyanide (HCN) has been produced on an industrial scale by the Andrussow method or the BMA method (see, for example, Ullman's Encyclopedia of Industrial Chemistry, Volume A8, Weinheim 1987, p. 161-163). For example, in the Andrussow process, HCN can be produced commercially by reacting ammonia with a methane-containing gas and an oxygen-containing gas at elevated temperature in a reactor in the presence of a suitable catalyst (US Patents 1,934,838 and 6,596,251). Sulfur compounds and higher congeners of methane may af...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01C3/02
CPCC01C3/0225B01J8/0221B01J8/0278B01J2208/00849B01J2208/00938B01F25/4316B01F25/43163B01F25/431971
Inventor 约翰·C·卡顿布兰特·J·斯塔尔曼洛基·王
Owner INVISTA TEXTILES (U K) LTD
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