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High-efficiency ammonium sulfate production method

A production method and technology of ammonium sulfate, applied in chemical instruments and methods, ammonia compounds, inorganic chemistry, etc., can solve the problems of inconvenient storage and transportation of ammonia water, low conversion rate of barium sulfate, low yield of ammonium sulfate, etc. Barium carbonate yield, high yield and obvious effect of economic benefit

Inactive Publication Date: 2019-05-14
罗丽斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, a large amount of barium sulfate waste slag will be produced in the production of lactic acid, and the barium sulfate waste slag is usually sold directly (such as sold to a cement factory), but the price is relatively low
Chinese patent document CN 101284676B discloses an ammonium sulfate manufacturing process, which uses barium sulfate as a raw material; but there are following technical defects in actual industrial production: 1, for lactic acid production enterprises, it is necessary to purchase ammonia and carbon dioxide as raw materials, and the ammonia water Storage and transportation are very inconvenient; 2. The conversion rate of barium sulfate is low, resulting in low yield of ammonium sulfate. 3. A large amount of barium sulfate is often trapped in the barium carbonate produced by the reaction. The amount increased

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0019] The production method of the present embodiment efficient ammonium sulfate, comprises the steps:

[0020] (1) raw material preparation: water, barium sulfate waste residue and ammonium bicarbonate, the ratio of the amount of substance of barium sulfate and ammonium bicarbonate is 1: 0.9 (that is: the amount of substance of barium sulfate in raw material barium sulfate waste residue and ammonium bicarbonate The ratio of the amount of the substance is 1:0.9), and the particle size of the barium sulfate waste residue is 80 mesh;

[0021] (2) add water and ammonium bicarbonate in reactor, stir and make the massfraction of ammonium bicarbonate in the whole dissolving solution of ammonium bicarbonate be 20%;

[0022] (3) Control the temperature of the solution in the reactor to 20°C, add barium sulfate waste residue under stirring, and react for 0.5 hours; continuously add ammonia water during the reaction to adjust the pH of the solution in the reactor to 8, and keep it unti...

Embodiment 2

[0027] The production method of the present embodiment efficient ammonium sulfate, comprises the steps:

[0028] (1) raw material preparation: water, barium sulfate waste residue and ammonium bicarbonate, the ratio of the amount of substance of barium sulfate and ammonium bicarbonate is 1: 1.2 (that is: the amount of substance of barium sulfate in raw material barium sulfate waste residue and ammonium bicarbonate The ratio of the amount of the substance is 1: 1.2), and the particle size of the barium sulfate waste residue is 100 mesh;

[0029] (2) add water and ammonium bicarbonate in reactor, stir and make ammonium bicarbonate all dissolve, and the massfraction of ammonium bicarbonate in the solution is 30%;

[0030] (3) Control the temperature of the solution in the reactor to be 30°C, add barium sulfate waste residue under stirring, and react for 3 hours; continuously add ammonia water during the reaction to adjust the pH of the solution in the reactor to be 10, and keep it...

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Abstract

The invention discloses a high-efficiency ammonium sulfate production method, which includes the following steps: (1) preparing raw materials: water, barium sulfate waste residue and ammonium bicarbonate, wherein the mass ratio of the barium sulfate (calculated according to the content of the barium sulfate in the barium sulfate waste residue, the same below) to the ammonium bicarbonate is 1: (0.9-1.2), and the particle size of the barium sulfate waste residue is greater than or equal to 80 meshes; (2) adding the water and the ammonium bicarbonate into a reaction kettle, stirring to completelydissolve the ammonium bicarbonate, wherein the mass fraction of the ammonium bicarbonate in the solution is 20%-30%; (3) controlling the temperature of the solution in the reaction kettle to be 20-30DEG C, adding the barium sulfate waste residue under stirring, and reacting for 0.5-3 hours; and continuously adding ammonia water in the reaction process to adjust the pH value of the solution in the reaction kettle to 8-10, and maintaining the pH value until the reaction is finished. the method can reduce the dosage of the ammonia water, and improve the conversion rate of the barium sulfate andthe yield of the ammonium sulfate in the barium sulfate waste residue, so that the method is suitable for producing the ammonium sulfate by comprehensively utilizing the barium sulfate waste residueof lactic acid production enterprises.

Description

technical field [0001] The invention relates to a method for producing high-efficiency ammonium sulfate, in particular to a method for producing ammonium sulfate by using barium sulfate waste residue produced in lactic acid production. Background technique [0002] In the prior art, a large amount of barium sulfate waste slag will be produced in the production of lactic acid, and the barium sulfate waste slag is usually sold directly (such as sold to a cement factory), but the price is relatively low. Chinese patent document CN 101284676B discloses ammonium sulfate manufacturing process, which adopts barium sulfate as raw material; but there are following technical defects in actual industrial production: 1, for lactic acid production enterprises, need to buy ammonia and carbon dioxide as raw materials, and ammonia water Storage and transportation are very inconvenient; 2. The conversion rate of barium sulfate is low, resulting in low yield of ammonium sulfate. 3. A large am...

Claims

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Application Information

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IPC IPC(8): C01C1/244
Inventor 罗丽斌
Owner 罗丽斌