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Method for preparing ammonium carbonate solution from recovered ammonia

An ammonium carbonate and solution technology, applied in chemical instruments and methods, ammonium carbonate/acid carbonate, degassed water/sewage treatment, etc., can solve the problem of low economic benefits, environmental pollution of waste water, waste gas and waste water Many problems, to achieve the effect of low processing cost, recycling, and eliminating environmental pollution

Inactive Publication Date: 2010-08-11
湖北开元化工科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main component of the wastewater is ammonium sulfate. Our company has been concentrating it at high temperature into ammonium sulfate fertilizer products, but the economic benefits are low, and there are many waste gases and wastewater in production, and the direct discharge of some wastewater has caused certain environmental pollution.

Method used

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  • Method for preparing ammonium carbonate solution from recovered ammonia
  • Method for preparing ammonium carbonate solution from recovered ammonia

Examples

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Effect test

Embodiment 1

[0014] Example 1: The ammonium sulfate wastewater produced during the production of manganese carbonate was added with alkali to adjust the pH to 11-14, filtered after reacting for 1 hour, and the supernatant was taken. The clear liquid is blown off to desorb the ammonia therein, and the ammonia is sprayed from top to bottom with a 3% ammonium bicarbonate solution in the absorption tower to prepare a 3.6% ammonium carbonate solution.

Embodiment 2

[0015] Example 2: The ammonium sulfate wastewater produced during the production of manganese carbonate was added with alkali to adjust the pH to 11-14, filtered after reacting for 1 hour, and the supernatant was taken. The clear liquid is blown off to desorb the ammonia therein, and the ammonium bicarbonate solution is sprayed from top to bottom to absorb the ammonia in the absorption tower to prepare a 24% ammonium carbonate solution.

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Abstract

This invention discloses a method for recovering ammonia water and preparing ammonium carbonate. The ammonium carbonate-containing waste water produced during production of manganese carbonate is added with alkali to regulate its pH value to 11-14. After one hr. reaction, it is filtered, and then the upper clear liquid containing mainly ammonia water is blowed and desorbing its ammonia content. Solution containing 3-20% of ammonium bicarbonate is sprayed-down for recovering ammonia and producing ammonium carbonate with its concentration of 3.5-25%. This inventive method is of low cost treatment, can produce remarkable economic benefit. The produced ammonium carbonate solution is then reused in the production of manganese carbonate as raw material, achieving reutilization of materials, reducing pollution to environment.

Description

technical field [0001] The invention relates to a method for preparing ammonium carbonate solution, in particular to a method for preparing ammonium carbonate solution with recycled ammonia. Background technique [0002] When manganese carbonate is produced, a large amount of waste water is generated. The main component of the wastewater is ammonium sulfate. The company has been concentrating it at high temperature to produce ammonium sulfate fertilizer products, but the economic benefits are low, and there are many waste gases and wastewater in production, and the direct discharge of some wastewater has caused certain environmental pollution. Contents of the invention [0003] The object of the present invention provides a kind of method with reclaiming ammoniacal liquor and prepares ammonium carbonate solution, and it can process ammonium sulfate waste water into the production raw material of manganese carbonate, and this method processing cost is low, can produce remar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01C1/26C01G45/00C02F1/20C02F1/66
Inventor 高士敬
Owner 湖北开元化工科技股份有限公司
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