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Method for producing series function magnesium chemical products by using magnesite

A chemical product, magnesite technology, applied in the direction of lime production, magnesium carbonate, magnesium sulfate, etc., can solve the problems of inconsistent and sustainable development, a large amount of smoke emission, high material consumption and energy consumption, and achieve broad adaptability, protection Environmental and production cost reduction effects

Inactive Publication Date: 2008-07-09
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Problems solved by technology

High material consumption and energy consumption, serious pollution, low utilization rate of products, wasting precious resources while emitting a large amount of smoke, dust, sewage, and waste residues, which does not meet the requirements of sustainable development

Method used

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  • Method for producing series function magnesium chemical products by using magnesite
  • Method for producing series function magnesium chemical products by using magnesite
  • Method for producing series function magnesium chemical products by using magnesite

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Embodiment

[0054] First take 50g of light-burned powder (magnesium oxide content greater than 90%), dissolve it with 100ml of water, add 60-120ml of concentrated sulfuric acid to dissolve, remove insoluble matter, and obtain crude magnesium sulfate solution 1.

[0055]Then take 50g of lightly burned powder (magnesium oxide content greater than 80%), dissolve it with 100ml of ammonium sulfate, and react by heating at 90°C. The ammonia gas released is recycled and the crude magnesium sulfate solution 2 obtained by filtering. Add 10-20ml concentrated sulfuric acid to dissolve the insoluble matter and remove the insoluble matter to obtain a crude magnesium sulfate solution 3.

[0056] Mix the crude magnesium sulfate solution together, measure 200ml of the solution, heat it to 45~50℃, add 3~5g of MgO to the solution in multiple times to react, stir and react for 5 minutes, the solution will produce gray precipitate, filtered to get the filter residue as The mixture of magnesium borate and a small...

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Abstract

Disclosed is a method for producing series of functional magnesium chemical products by magnesite, which relates to a method for producing magnesium chemical products by magnesite. The invention comprises the following steps that the first step is acid hydrolyzing the light burden magnesium calcined by the magnesite and removing impurities, simultaneously ammonium leaching and acid hydrolyzing the light burden magnesium calcined by the magnesite and tailings and removing impurity, the second step is neutrializing and oxidizing the solution after removing impurity, continuing to remove metallic impurities, the third step double decomposition reacting the solution removed to obtain heavy magnesium aqueous solution, the forth step is pyrolyzing the heavy magnesium aqueous solution to obtain light magnesium carbonate of pharmaceutical-food grade and aminating the heavy magnesium aqueous solution to obtain inflaming retarding magnesium hydrate, the fifth step is calcining the light magnesium carbonate to obtain high-activity magnesium oxide of nanometer grade. The products produced by the invention have high quality and high added value, can recycle ammonium sulfate of the outgrowth processing technique, and can be environmental-friendly and bring economic benefit for enterprises.

Description

Technical field [0001] The invention relates to a method for using magnesite to produce magnesium chemical products, in particular to a method for using magnesite to produce fibrous magnesium hydroxide, basic magnesium carbonate and high-activity nano-magnesium oxide. Background technique [0002] At present, China's magnesia-based chemical materials have a small production scale and low level of equipment technology, especially the small production capacity of a single device. There are almost no 10,000 tons / single equipment, which cannot meet the needs of the national economy. The product variety is small, the grade is low, the quality is unstable, and the quantity cannot meet the market demand. Many functional products still rely on foreign imports. High material and energy consumption, serious pollution, low product utilization, waste valuable resources, and emit a large amount of flue gas, dust, sewage, and waste residue, which does not meet the requirements of sustainable d...

Claims

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Application Information

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IPC IPC(8): C04B2/10C01F5/40C01F5/24C01F5/20
CPCY02P40/40
Inventor 王国胜宁志高
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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