Method for producing chlorine

A manufacturing method, hydrogen chloride technology, applied in the field of chlorine manufacturing, can solve problems such as uncontrolled reaction, high-temperature gas corrosion of equipment materials, etc.

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

AI Technical Summary

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

[0038] A fixed-bed reactor was used as the reactor, which consisted of a reaction tube (a temperature measurement jacket with an outer diameter of 5 mm) having an inner diameter of 18 mm and a length of 1 m with a jacket filled with molten salt (potassium nitrate / nitrous acid Sodium = 1 / 1 weight ratio) as heat medium.

[0039] The upper part of the reaction tube is filled with α-Al with a diameter of 1.5mm 2 o 3 80.2 g (60.0 ml) of a catalyst extruded with 6.6% by weight of ruthenium oxide was used as the first reaction stage. It should be noted that the catalyst used for the oxidation reaction of hydrogen chloride for about 260 hours was used again as a catalyst.

[0040] In the lower part of the first reaction section, it is filled with anatase crystalline TiO with a diameter of 1-2mm evenly mixed. 2 35.9 g (35.6 ml) of spherical granular catalysts carrying 6.6% by weight of ruthenium oxide and α-Al with a diameter of 2 mm 2 o 3 37.6 g (17.8 ml) of balls (manufactured b...

Embodiment 2

[0046] Use a kind of fixed-bed reactor that is formed by 3 reaction tubes connected in series as reactor, wherein a reaction tube is the reaction tube made of Ni of internal diameter 26mm and length 2.0m (outer diameter 6mm temperature measurement sleeve pipe), this The reaction tube has an electric furnace, and all the other two reaction tubes are reaction tubes with an internal diameter of 18mm and a length of 2.5m (the temperature measurement sleeve of an external diameter of 6mm), with molten salt (potassium nitrate / sodium nitrite=1 / 1 weight Than) as a jacket for heat medium. A reaction tube with an inner diameter of 26 mm is uniformly mixed with α-Al with a diameter of 1.5 mm 2 o 3 69g (60ml) of extruded catalyst supporting 6.6% by weight of ruthenium oxide and α-Al with a diameter of 2mm 2 o 3 132 g (60 ml) of balls are used as the first reaction stage. The first reaction tube with an inner diameter of 18mm is uniformly mixed and filled with anatase-type crystalline ...

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Abstract

A process for producing chlorine comprising the step of oxidizing hydrogen chloride in a gas containing hydrogen chloride with a gas containing oxygen in the presence of a catalyst, wherein the oxidation of hydrogen chloride is carried out in at least two reaction zones each comprising a catalyst-packed layer, which are arranged in series, and a temperature in at least one of said reaction zones is controlled with a heat exchange system. According to this process, the stable activity of the catalyst is maintained and chlorine can be stably obtained at a high yield since the excessive hot spot in the catalyst-packed layer is suppressed and the catalyst-packed layer can be effectively used.

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): C01B7/04
CPCC01B7/04Y02P20/20
Inventor 岩永清司铃田哲也森康彦吉井政之
Owner SUMITOMO CHEM CO LTD
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