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Method and device for preparing carbon oxysulfide gas

A technology of carbon oxysulfide and gas, which is applied in the direction of carbon oxysulfide and carbon-sulfur compounds, can solve the problems of many side reactions and achieve the effects of reducing the generation of impurities, improving efficiency, and increasing yield

Pending Publication Date: 2019-08-16
DALIAN KELIDE OPTOELECTRONICS MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because this method is carried out in aqueous solution, there are many side reactions in the reaction process, and there are many impurities such as sulfur, carbon dioxide, hydrogen sulfide, etc., so the yield can only be maintained at about 80%.

Method used

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  • Method and device for preparing carbon oxysulfide gas

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0043] 1. The concentrated sulfuric acid of 2 / 3 of theoretical feeding amount is diluted to 65% concentration, throws in the reaction kettle 1, adds the concentration that is 65% solution with the preparation of 25kg ammonium thiocyanate in the raw material dripping tank A2, to the raw material Add the concentrated sulfuric acid of remaining 1 / 3 amount of 93% concentration in the drip tank B3;

[0044] ②Preheat the reactor 1 to 60°C and start stirring, open the valve at the bottom of the raw material dropping tank A2 and slowly add the ammonium thiocyanate solution to the reactor 1;

[0045] ③ Observe the change of sulfuric acid concentration in the reaction kettle 1 through the acidity meter 7. When the concentration drops to 60%, open the bottom valve of the raw material dripping tank B3, and add concentrated sulfuric acid to the reaction kettle 1 dropwise;

[0046] ④ Keep the temperature of the reactor between 60-70°C and the pressure of 0-0.2Mpa by controlling the dropping...

example 2

[0051] 1. The concentrated sulfuric acid of 2 / 3 of theoretical feeding amount is diluted to 65% concentration, throws in the reaction kettle 1, adds the concentration that is 65% solution with the preparation of 25kg ammonium thiocyanate in the raw material dripping tank A2, to the raw material Add the concentrated sulfuric acid of remaining 1 / 3 amount of 93% concentration in the drip tank B3;

[0052] ②Preheat the reactor 1 to 50°C and start stirring, open the valve at the bottom of the raw material dripping tank A2 and slowly add the ammonium thiocyanate solution to the reactor 1;

[0053] ③ Observe the change of sulfuric acid concentration in the reaction kettle 1 through the acidity meter 7, and when the concentration drops to 55%, open the valve at the bottom of the raw material dripping tank 2, and drip concentrated sulfuric acid to the reaction kettle;

[0054] ④ Keep the temperature of the reactor between 50-60°C and the pressure of 0-0.2Mpa by controlling the dropping...

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Abstract

The invention discloses a method and device for preparing carbon oxysulfide gas. According to the method, an ammonium thiocyanate solution and concentrated sulfuric acid are simultaneously dropwise added into a sulfuric acid solution with a certain concentration to carry out reactions; and generated carbon oxysulfide gas is condensed, dried, compressed and filled into a product bottle. The deviceis composed of following parts, which are connected through pipelines: a reactor, a raw material dropwise addition tank (A), a raw material dropwise addition tank (B), a condenser, a drier, a compressor, and a product bottle. Ammonium thiocyanate and concentrated sulfuric acid are dropwise added at the same time, the efficiency of the reactions between ammonium thiocyanate and concentrated sulfuric acid is obviously improved, generated impurities are reduced, and the yield of carbon oxysulfide is greatly increased and can reach 93% or more.

Description

technical field [0001] The invention belongs to a method and a device for preparing carbon oxysulfide gas, in particular to a method and a device for preparing carbon oxysulfide gas by simultaneously dropping ammonium thiocyanate and concentrated sulfuric acid. Background technique [0002] Carbon oxysulfide, also known as carbonyl sulfide, is a gas widely used in the production of medicines, pesticides and other chemical products. It has been used as a fumigant for food for a long time. It has the characteristics of moderate toxicity and easy degradation. An important raw material for carbamate pesticides and insecticides. In recent years, high-purity carbon oxysulfide has been used in the etching process of integrated circuits, and the development trend is rapid. [0003] At present, the methods for preparing carbonyl sulfide are divided into dry method and wet method, the difference lies in whether the synthesis reaction is carried out in aqueous solution. [0004] ① Dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/77
CPCC01B32/77
Inventor 赵毅赵趫王天源裴凯刘颖计燕秋张琳
Owner DALIAN KELIDE OPTOELECTRONICS MATERIALS CO LTD