Method for producing chlorine

A manufacturing method and technology of hydrogen chloride, applied in the field of chlorine manufacturing, can solve problems such as reaction runaway, high temperature gas corrosion of equipment materials and the like

Inactive Publication Date: 2002-04-10
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, in the worst case, excessive hot spots can cause runaway reactions, and hydrogen chloride and / or chlorine can cause problems with high temperature gas corrosion of equipment materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A fixed-bed reactor was used as the reactor, which consisted of a reaction tube made of Ni with an inner diameter of 18 mm and a length of 1 m (a temperature measurement jacket with an outer diameter of 5 mm), and the jacket was filled with a molten salt (potassium nitrate / Sodium nitrite = 1 / l weight ratio) as heat medium. The reaction tube is filled with anatase crystalline TiO with a diameter of 1-2mm 2 99.4 g (100 ml) of a spherical particulate catalyst supported by 6.6% by weight of ruthenium oxide was used as a catalyst packed layer. The upper and lower parts of the catalyst packing layer are respectively filled with α-Al with a diameter of 2mm 2 o 3 238 g and 164 g of balls (manufactured by Nichikato Co., Ltd., SSA995). It should be noted that from anatase crystalline TiO with a diameter of 1-2mm 2 The spherical particulate catalyst supporting 6.6% by weight of ruthenium oxide can be prepared according to the method described in JP-A-10-338502, and the cataly...

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Abstract

In a method for producing chlorine comprising oxidizing hydrogen chloride present in a gas containing the hydrogen chloride using a gas containing oxygen in a fixed bed reaction system having a reaction region comprising catalyst-packed layer, an improvement which comprises conducting the oxidation reaction with a superficial linear velocity of the gas of 0.70 to 10 m / sec is disclosed. This method enables the inhibition of formation of excess hot spots and effective utilization of the catalyst-packed layers, which results in maintaining stable activity of the catalyst and in the production of chlorine in high yield with good stability.

Description

technical field [0001] The present invention relates to a method for producing chlorine. More particularly, the present invention relates to a method for producing chlorine by oxidizing hydrogen chloride in a hydrogen chloride-containing gas with an oxygen-containing gas. Background technique [0002] Chlorine is known to be used as a raw material for vinyl chloride, phosgene, etc., which can be produced by oxidizing hydrogen chloride. For example, it is known that chlorine is produced by contacting hydrogen chloride with molecular oxygen in the presence of a catalyst to produce chlorine. However, in this method, a copper-based catalyst called a Deacon catalyst is used. To make such a copper-based catalyst have excellent activity, there are many proposals to add various compounds as a third component to copper chloride and potassium chloride. In addition, in addition to the method using the Deacon catalyst, a method using chromium oxide or a compound thereof as a catalyst,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46C01B7/04
CPCC01B7/04Y02P20/20
Inventor 岩永清司吉井政之铃田哲也
Owner SUMITOMO CHEM CO LTD
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