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Process for producing ammonium sulfate and hydrogen chloride by employing ammonium chloride and sulfuric acid

A technology for the production of sulfuric acid and ammonium chloride, applied in the field of chemical technology, can solve the problems of reducing the purity of hydrogen chloride gas, and achieve the effects of easy separation, continuous feeding and economic performance.

Inactive Publication Date: 2013-06-05
BEIJING EDGEIN TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that in the prior art, air may be introduced when hydrogen chloride gas is exported under negative pressure or normal pressure conditions, thereby reducing the problem of the purity of hydrogen chloride gas prepared

Method used

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  • Process for producing ammonium sulfate and hydrogen chloride by employing ammonium chloride and sulfuric acid

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Embodiment 1

[0029] The present embodiment provides a kind of production method of ammonium sulfate, as attached figure 1 As shown, specifically:

[0030] Step 1, the concentrated sulfuric acid of the 98wt% of 5349 grams of ammonium chloride and 11000 is added in the premixing tank of band stirring and strainer and carry out normal pressure premixing, the ratio of the amount of substance of ammonium chloride and sulfuric acid 1:1.1, premixing The mixing temperature is 15°C.

[0031] Step 2, the premixed ammonium chloride sulfuric acid solution is continuously pumped into a tubular reactor with a steam jacket, and a metathesis reaction occurs to generate ammonium bisulfate and hydrogen chloride. This reaction is an endothermic reaction, and the required heat is obtained by The steam jacket of the tubular reactor is provided, the reaction temperature is 110°C, and the pressure is 0.2MPa. The obtained ammonium bisulfate solution is evaporated and concentrated, cooled and crystallized at 20°C...

Embodiment 2

[0038] The present embodiment provides a kind of production method of ammonium sulfate, with embodiment 1, specifically:

[0039] Step 1, the vitriol oil of 60wt% of 5349 grams of ammonium chloride and 24500 is added in the premixing tank of belt stirring and strainer and carry out normal pressure premixing, the ratio of the amount of substance of ammonium chloride and sulfuric acid 1:1.5, pre The mixing temperature is 30°C.

[0040] Step 2, the premixed ammonium chloride sulfuric acid solution is continuously pumped into a tubular reactor with a steam jacket, and a metathesis reaction occurs to generate ammonium bisulfate and hydrogen chloride. This reaction is an endothermic reaction, and the required heat is obtained by The steam jacket of the tubular reactor is provided, the reaction temperature is 90°C, and the pressure is 0.7MPa. The obtained ammonium bisulfate solution is evaporated and concentrated, cooled and crystallized at 10°C, filtered and washed to obtain solid a...

Embodiment 3

[0046] The present embodiment provides a kind of production method of ammonium sulfate, with embodiment 1, specifically:

[0047] Step 1, the concentrated sulfuric acid of the 90wt% of 5349 grams of ammonium chloride and 13067 is added in the premixing tank of band stirring and strainer and carry out normal pressure premixing, the ratio of the amount of substance of ammonium chloride and sulfuric acid 1:1.2, premix The mixing temperature is 40°C.

[0048] Step 2, the premixed ammonium chloride sulfuric acid solution is continuously pumped into a tubular reactor with a steam jacket, and a metathesis reaction occurs to generate ammonium bisulfate and hydrogen chloride. This reaction is an endothermic reaction, and the required heat is obtained by The steam jacket of the tubular reactor is provided, the reaction temperature is 145°C, and the pressure is 1.3MPa. The obtained ammonium bisulfate solution is evaporated and concentrated, cooled and crystallized at 38°C, filtered and w...

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Abstract

The invention relates to a process for producing ammonium sulfate and hydrogen chloride. The process specifically comprises the following steps: 1, premixing ammonium chloride and sulfuric acid at normal pressure; 2, pumping the obtained sulfuric acid solution of ammonium chloride in step 1 into a tubular reactor, and obtaining ammonium bisulfate and hydrogen chloride gas; and 3, preparing the ammonium bisulfate obtained in step 2 into an aqueous solution, and carrying out an ammonolysis reaction to obtain ammonium sulfate through an ammoniation tower. The ammonium sulfate is prepared by utilizing ammonium chloride, the tubular reactor and the ammoniation tower reactor are mainly selected, a positive pressure reaction is adopted, the reaction conversion rate is improved, the production steps are simplified, the target product yield is improved, and the large-scale continuous production requirements are met; meanwhile, the reaction links are organically combined, the reaction is finished, the generated concentrated sulfuric acid, crystallization mother liquor and the like in the production process are utilized, and the effluent discharge amount is small in the whole production process; and moreover, the ammonium chloride deep-processing problem is effectively solved, and a novel method for producing ammonium sulfate by utilizing high-additional value ammonium chloride is developed.

Description

technical field [0001] The invention belongs to the field of chemical technology, in particular to a technology for producing ammonium sulfate and hydrogen chloride by using ammonium chloride and sulfuric acid. Background technique [0002] With the development of the soda industry, the output of by-product ammonium chloride is increasing year by year. At present, the main consumption channel of ammonium chloride in my country is to add compound fertilizer in the form of ammonium nitrogen, which is suitable for rice, cotton, vegetables and other crops, but for some "chlorine-avoiding crops", such as sweet potato, potato, sugar beet, sugarcane, flax , Tobacco, grapes, citrus, tea trees, etc. should not be used, otherwise their quality will be adversely affected. Ammonium chloride applied to root and tuber crops will reduce the starch content; applied to sugar beets, grapes, citrus and other plants will reduce their sugar content; applied to tobacco will affect its combustibil...

Claims

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Application Information

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IPC IPC(8): C01C1/24C01B7/05
Inventor 唐印雷林刘朝慧陈辉姜新会饶丹匡向东
Owner BEIJING EDGEIN TECH
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