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Preparation method for ammonium sulfate

A technology of ammonium sulfate and ferrous sulfate, applied in the direction of ammonium sulfate, etc., can solve environmental pollution and other problems, and achieve the effect of improving utilization rate

Inactive Publication Date: 2014-01-15
江苏江盛南节能科技有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] For the treatment of hydrochloric acid pickling waste liquid, many enterprises consider the cost and technical problems of waste liquid treatment, so they adopt direct discharge, which causes great pollution to the environment

Method used

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Embodiment Construction

[0008] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

[0009] A preparation method of ammonium sulfate, extracting ferrous ions in hydrochloric acid pickling waste liquid to prepare ferrous sulfate, then adding ammonia water to ferrous sulfate to carry out oxidation and neutralization reaction, the obtained ammonium sulfate containing a small amount of ammonium chloride Crystallization, drying to remove ammonium chloride to obtain ammonium sulfate.

[0010] The molar ratio of ferrous ion and ammonia water reaction is 1:5.

[0011] The drying temperat...

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Abstract

The invention discloses a preparation method for ammonium sulfate. The method comprises the following steps: extracting ferrous ions in waste hydrochloric acid pickling liquid to prepare ferrous sulphate; then adding ammonia water into ferrous sulphate and carrying out oxidation and neutralization reactions; subjecting obtained ammonium sulfate including a small amount of ammonium chloride to crystallization; and carrying out drying to remove ammonium chloride so as to obtain ammonium sulfate. The method provided by the invention has the following advantages: comprehensive utilization of the waste hydrochloric acid pickling liquid is carried out to prepare ammonium sulfate, and the utilization rate of the waste hydrochloric acid pickling liquid is increased.

Description

technical field [0001] The invention relates to a preparation method of ammonium sulfate. Background technique [0002] For the treatment of hydrochloric acid pickling waste liquid, many enterprises consider the cost and technical problems of waste liquid treatment, so they adopt direct discharge, which causes great pollution to the environment. In fact, many components in the waste hydrochloric acid pickling solution can be reused. Contents of the invention [0003] Purpose of the invention: at the problems referred to above, the purpose of this invention is to provide a kind of preparation method of ammonium sulfate, utilize hydrochloric acid pickling waste liquor as raw material, improve the utilization ratio of hydrochloric acid pickling waste liquor. [0004] Technical solution: a method for preparing ammonium sulfate, extracting ferrous ions in hydrochloric acid pickling waste liquid to prepare ferrous sulfate, then adding ammonia water to ferrous sulfate for oxidat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/24
Inventor 付荣
Owner 江苏江盛南节能科技有限公司
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