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Technique for producing ammonium sulfate and hydrochloric acid using ammonium chloride and sulphuric acid

A technology for the production of sulfuric acid and ammonium sulfate, which is applied in the directions of ammonium sulfate, chloride preparation, chlorine/hydrogen chloride, etc., can solve problems such as unfavorable industrial development, high investment cost, complicated operation, etc., and achieves low environmental pollution and investment cost. The effect of not high and low energy consumption

Inactive Publication Date: 2005-11-02
赵国学 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above process consumes a lot of energy, is complicated to operate, and has high investment costs, which is not conducive to industrial development

Method used

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  • Technique for producing ammonium sulfate and hydrochloric acid using ammonium chloride and sulphuric acid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take sulfuric acid with a concentration of 50%, put it into a three-necked bottle (reactor), and then heat it to 60°C ± 2°C. When the temperature is constant, add ammonium chloride. The molar ratio of the above-mentioned ammonium chloride to sulfuric acid is: 1 : 5, now a large amount of hydrogen chloride gas is produced, and under negative pressure, it is sent into the hydrochloric acid absorption tower through the conduit, and hydrochloric acid is made through water absorption, and the gas absorption efficiency can reach more than 95%, and the ammonium sulfate generated in the carrier solution, Crystallization occurs at room temperature. After vacuum filtration, the crude ammonium sulfate is obtained, and the crude product can be refined to obtain industrial grade or agricultural ammonium sulfate.

Embodiment 2

[0021] Put 50% sulfuric acid into the reaction kettle, then heat up to 60°C, start stirring and put all the ammonium chloride into the reaction kettle with a sheltered feeder, the molar ratio of the above-mentioned ammonium chloride to sulfuric acid is: 1: 3, then A large amount of hydrogen chloride gas is produced. This gas enters the first hydrochloric acid absorption tower under negative pressure, and the tail gas after water absorption is absorbed by the second hydrochloric acid absorption tower. The tail gas of the second hydrochloric acid absorption tower is mixed with lime water by Venturi pump. Exhaust gas meets environmental protection emission standards. Obtain required hydrochloric acid product from the first hydrochloric acid absorption tower, the end point of this reaction process is as the criterion with no bubbles appearing on the liquid level of the reaction liquid in the observation reactor, then all the reaction liquid is discharged into the crystallization ta...

Embodiment 3

[0023] Throw sulfuric acid with a concentration of 95% into the reactor, and when the temperature rises to 25°C, add ammonium chloride, the molar ratio of the above-mentioned ammonium chloride to sulfuric acid is: 1:2; Then, it is sent into the absorption tower for water absorption, and finally made into finished product hydrochloric acid; and the ammonium sulfate in the product is cooled, cooled, crystallized and filtered, and finally made into finished product ammonium sulfate. The above-mentioned crystallization temperature is: 30° C., and the crystallization time is 6 hours.

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Abstract

The present invention belongs to the field of chemical technology, and is especially the technological process of produce ammonium sulfate and hydrochloric acid with ammonium chloride and sulfuric acid. The technological process includes the successive steps of: A. throwing sulfuric solution of 20-95 % concentration into reactor, heating to 20-120 deg.c, and adding ammonium chloride in the molar ratio to sulfuric acid of 1 to 1-6; and B. reaction to produce gaseous hydrogen chloride and ammonium sulfate, feeding the gaseous hydrogen chloride under negative pressure to absorption tower for absorption with water to produce hydrochloric acid, and cooling, crystallizing and filtering ammonium sulfate to obtain ammonium sulfate product.

Description

technical field [0001] The invention belongs to the field of inorganic chemical technology, in particular to a process for producing ammonium sulfate and hydrochloric acid by using ammonium chloride and sulfuric acid. Background technique [0002] Some chemical companies use a large amount of hydrochloric acid, and the amount of ammonium chloride produced is also considerable. Market research shows that the contradiction between supply and demand of hydrochloric acid products is very prominent, while the sales of ammonium chloride products are not very satisfactory. The emergence of the above phenomenon has seriously restricted the development of enterprises. [0003] According to literature reports, the United States, Germany and other countries have used the catalytic decomposition method to make ammonium chloride into hydrochloric acid and ammonia water, while the basic process route for the production of hydrochloric acid in my country is the synthesis of hydrochloric a...

Claims

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Application Information

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IPC IPC(8): C01B7/05
Inventor 赵国学赵振新
Owner 赵国学