Method and equipment for producing liquid sulfur dioxide through sulfur trioxide and sulphur

A liquid sulfur dioxide and sulfur trioxide technology, which is applied in chemical instruments and methods, inorganic chemistry, sulfur compounds, etc., can solve the problems of high investment cost, increase of air separation units, and high operation cost, and achieves reduction of production and operation cost, technological progress, etc. Simple process, stable and reliable results

Active Publication Date: 2014-03-12
SHANDONG KAISHENG NEW MATERIALS
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The domestic process that can separate from the sulfuric acid plant and independently produce liquid sulfur dioxide is basically the pure oxygen sulfur combustion method. This process adopts the control conditions of excessive sulfur and oxygen deficiency. There are a large number of sulfur particles in the gas. Additional purification processes are required and the equipment is complicated. At the same time, it is necessary to increase the air separation unit, the investment cost is high, the operation cost is high, and the quality of sulfur dioxide is unstable

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  • Method and equipment for producing liquid sulfur dioxide through sulfur trioxide and sulphur

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Effect test

Embodiment 1

[0037] (1) Pass 80% concentrated sulfuric acid into the reactor, the addition amount is 30% of the volume of the reactor, the temperature of the reactor is raised to 80°C, and then the liquid sulfur trioxide at 30°C and the liquid sulfur at 140°C are in accordance with the mass flow ratio of 4:1, Pass it into the reaction kettle, stir and react, the liquid sulfur trioxide and liquid sulfur will immediately generate gaseous sulfur dioxide under the mixing action of concentrated sulfuric acid, and release a lot of heat, and control the temperature of the reaction kettle to maintain 80 °C under the action of jacketed circulating water;

[0038] (2) The sulfur dioxide gas mixed with sulfur trioxide enters the packed reaction tower through the demister and continues to react. The sulfur trioxide contacts with solid sulfur and is further converted into sulfur dioxide, and the temperature of the packed reaction tower is kept at 60°C under the action of cooling water ;

[0039] (3) Th...

Embodiment 2

[0041] (1) Pass 98% concentrated sulfuric acid into the reactor, the addition amount is 40% of the volume of the reactor, the temperature of the reactor is raised to 90°C, and then the liquid sulfur trioxide at 35°C and the liquid sulfur at 130°C are in accordance with the mass flow ratio of 5:1, Pass it into the reaction kettle, stir and react, the liquid sulfur trioxide and liquid sulfur will immediately generate gaseous sulfur dioxide under the mixing action of concentrated sulfuric acid, and release a lot of heat, and the temperature of the reaction kettle is controlled to maintain 95 °C under the action of jacketed circulating water;

[0042] (2) The sulfur dioxide gas mixed with sulfur trioxide enters the packed reaction tower through the demister and continues to react. The sulfur trioxide contacts with solid sulfur and is further converted into sulfur dioxide, and the temperature of the packed reaction tower is kept at 80°C under the action of cooling water ;

[0043] ...

Embodiment 3

[0045] (1) Pass 20% oleum into the reactor, the amount added is 50% of the volume of the reactor, the temperature of the reactor is raised to 100°C, and then liquid sulfur trioxide at 40°C and liquid sulfur at 135°C are in accordance with the mass flow ratio of 5: 1. Pass it into the reaction kettle, stir and react, the liquid sulfur trioxide and liquid sulfur will immediately generate gaseous sulfur dioxide under the mixing action of oleum, and release a lot of heat, and control the temperature of the reaction kettle to maintain 105°C under the action of jacketed circulating water ;

[0046] (2) The sulfur dioxide gas mixed with sulfur trioxide enters the packed reaction tower through the demister, and the unreacted sulfur trioxide is contacted with solid sulfur to be further converted into sulfur dioxide, and the temperature of the packed reaction tower is kept at 90°C;

[0047] (3) The sulfur dioxide gas from the packed reaction tower enters the purification tower and pick...

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Abstract

The invention belongs to the technical field of inorganic chemical industry, and particularly relates to a method and equipment for producing liquid sulfur dioxide through sulfur trioxide and sulphur. The method comprises the following steps: concentrated sulfuric acid or fuming sulphuric acid is fed into a reaction kettle, then liquid sulfur trioxide and liquid sulphur are fed into the reaction kettle, and stirring for reaction is performed; mixed gas generated through reaction enters a packing reaction tower filled with blocky solid sulphur for reaction, then mixed gas generated through reaction sequentially enters a purification tower and a pickling tower for purification absorption, and then is cooled to be liquid sulfur dioxide through a condenser. The equipment comprises the reaction kettle, wherein the reaction kettle, the packing reaction tower, the purification tower, the pickling tower, the condenser and a liquid sulfur dioxide storage tank are sequentially connected with one another; the reaction kettle is connected with a blow-down pump. Compared with the conventional pure-oxygen sulphur-burning method, the method has the advantages that multiple complex filtering equipment and oxygen generating equipment with relatively high cost are not required, the raw materials are cheap and easy to obtain, and are not required to be processed, the processes are simple, the technology is stable and reliable, the production running cost is reduced greatly, the product quality is high, and the method is suitable for industrial production of the liquid sulfur dioxide.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical industry, and in particular relates to a method and equipment for producing liquid sulfur dioxide from sulfur trioxide and sulfur. Background technique [0002] Sulfur dioxide is an important chemical raw material widely used in industries such as chemicals, medicine, pesticides, man-made fibers, dyes, rubber additives, papermaking, petroleum processing and metal refining. In the field of thionyl chloride industry, sulfur dioxide is an important raw material for the production of thionyl chloride, and the quality and cost of liquid sulfur dioxide are directly related to the further development of the thionyl chloride industry. [0003] As an important inorganic fine chemical product, thionyl chloride has strong acid chlorination ability and is the most commonly used chlorinating agent. It is widely used in pesticides, medicines, dyes, organic synthesis and other industries. At present,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/50
Inventor 张泰铭张善民毕义霞谢圣斌薛居强杨德耀
Owner SHANDONG KAISHENG NEW MATERIALS
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