Method for producing basic magnesium carbonate with boric sludge

A technology of magnesium carbonate and boron mud, applied in magnesium carbonate, magnesium hydroxide and other directions, can solve problems such as being unsuitable for industrial production, and achieve the effect of shortening production cycle, energy saving production cycle and creating value

Inactive Publication Date: 2009-11-11
吉林省新世纪农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously this process is not suitable for industrial production

Method used

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  • Method for producing basic magnesium carbonate with boric sludge
  • Method for producing basic magnesium carbonate with boric sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 1 kg of Liaoning Kuandian boron mud No. 1 and put it into the furnace, heat it to 500°C for 0.8 hours, take it out and cool it to room temperature.

[0031] Then use 6 liters of water and boron mud to mix into a slurry, pour it into a 10 liter stainless steel reaction kettle, add 6 grams (0.1% of the water amount) of wood vinegar, and start stirring at room temperature to feed 5kg / cm 2 CO 2 After reacting for 6 hours, detect the reaction solution with pH test paper, stop the reaction at pH=7.0, discharge and filter.

[0032] Get mother liquor and be heated to 98 ℃, be incubated 35 minutes, then filter and air-dry at room temperature, the white solid that obtains weighs 420g product, and the yield is 42% according to the amount of water-containing boron slime, and the yield is 42% according to the amount of dehydrated (30%) boron slime The yield is 60%, and the magnesium mud is dried to obtain 335g.

Embodiment 2

[0034] Weigh 1 kg of Jilin Ji'an City boron mud No. 1 and put it into the furnace, heat it to 300°C for 2.0 hours, take it out and cool it to room temperature.

[0035] Then mix 4.5 liters of water with boron mud to form a slurry, pour it into a 10 liter stainless steel reaction kettle, add 4.5 grams (0.1% of the water amount) of wood vinegar, and start stirring at room temperature to feed 3.5kg / cm 2 CO 2 After reacting for 6 hours, detect the reaction solution with pH test paper, stop the reaction at pH=7.0, discharge and filter.

[0036] Get mother liquor and be heated to 100 ℃, be incubated 15 minutes, then filter and air-dry at 50 ℃, the white solid basic magnesium carbonate 410g that obtains, yield is 41% by boron mud amount, the (10% water) of dehydrated boron mud 45.5%, to get magnesium mud 361g.

Embodiment 3

[0038] Weigh 1Kg of Liaoning Kuandian boron mud No. 2 and put it into the furnace, heat it to 400°C for 1.5 hours, take it out and cool it to room temperature.

[0039] Then use 5 liters of water and boron mud to mix into a slurry, pour it into a 10 liter stainless steel reaction kettle, add 5 grams (0.1% of the water amount) of wood vinegar, and start stirring at room temperature to feed 4kg / cm 2 CO 2 After reacting for 6 hours, detect the reaction liquid with pH test paper, stop the reaction at pH = 7.0, discharge and filter.

[0040] Get the mother liquor and heat it to 99°C, keep it warm for 20 minutes, then filter and air-dry at 80°C to obtain 470g of dry basic magnesium carbonate, the yield is 47% of boron mud, remove water (20% moisture), 58.7% of boron mud , to get magnesium mud 460g.

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Abstract

The method for producing basic magnesium carbonate from boron mud of the present invention belongs to the technical field of inorganic compound and sludge treatment. Including the process steps of activating boron mud, carbonization and finished products; said carbonization is to mix the calcined boron mud, water and the wood vinegar liquid catalyst with disconnected water molecules at normal temperature and feed CO2 to stir the reaction, The reaction is terminated at pH=7; the finished product is to filter the slurry produced in the carbonization step, take the mother liquor and heat it for heat preservation, and filter and dry to obtain the finished basic magnesium carbonate. All the industrial water in the invention is circulating water, so a large amount of water can be saved; the energy can be greatly saved and the production cycle can be shortened, and micronutrients necessary for ecological agriculture can be produced after neutralization of magnesium mud. In this way, the resource utilization of boron mud can not only create value, turn waste into wealth, but also protect the environment.

Description

technical field [0001] The invention belongs to the technical field of inorganic compounds and sludge treatment, and in particular relates to a method for preparing high-quality basic magnesium carbonate using boron daub as a raw material after borax is produced by boron magnesium ore through a chemical reaction. technical background [0002] As we all know, boron is rarely distributed in nature, and the boron content in the earth's crust is 9 parts per million, mainly in borate and borosilicate minerals. Ascharite, Mg 2 [B 2 o 4 (OH)[OH]], so there are borax factories in the local area. The main component B of boronite 2 o 3 12-14% and MgO 40%. Therefore, after the ore produces borax, the boron mud containing MgO is concentrated to more than 50%, and it becomes magnesium-rich boron mud, which is equivalent to magnesium-rich ore. [0003] Borax has been produced in China for nearly 20 years. So far, borax has been thrown away as waste, because borax production is carr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/24C01F5/14
Inventor 崔湘浩赵渊
Owner 吉林省新世纪农业科技有限公司
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