Method for preparing nano active calcium carbonate series products and ammonium chloride by carbide slag

A technology of active calcium carbonate and series products, which is applied in the field of preparation of inorganic salt nanomaterials, can solve the problems of high cost, complex production and equipment, and low yield, and achieve the effect of low cost, small investment, and large output

Inactive Publication Date: 2009-11-18
王嘉兴
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It is basically one of the traditional production methods, and its disad

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  • Method for preparing nano active calcium carbonate series products and ammonium chloride by carbide slag

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Embodiment 1

[0014] Embodiment 1: Use 200 kilograms of calcium carbide slag (8) to mediate into emulsion and dilute hydrochloric acid (10) according to the mass ratio of pure substance 1: 0.98 and mix in reactor (1), react to generate calcium chloride and water, suction filter Obtain filter cake and calcium chloride solution, filter cake is directly thrown into incinerator after incineration and buries deeply, obtains 298.03 kilograms of calcium chloride solution and injects in the ammonium carbonizer (3) as mother liquor after evenly mixing with 6% tensio-active agent, the inside has Ammonia water prepared in advance at a mass ratio of 1:0.95. Start the stirrer to mix the solution evenly at a speed of 400 rpm, and then carry out ammonium carbonization, that is, to slowly introduce carbon dioxide (9) gas with a mass ratio of 1:0.39 under stirring. The end point of carbonization is when the reaction liquid becomes neutral to slightly alkaline. Suction filtration (4) obtains 264.16 kilogram...

Embodiment 2

[0015] Example 2: 200 kg of calcium carbide slag and hydrochloric acid are mixed in the reactor according to the mass ratio of 1:0.68, the reaction generates calcium chloride and water, and the filter cake and calcium chloride solution are obtained by suction filtration, and the filter cake is directly thrown into the incinerator Deep bury after incineration, obtain 206.79 kilograms of calcium chlorides and inject in the ammonium carbonizer as mother liquor after uniformly mixing with 3% surfactant, there is the ammoniacal liquor that the mass ratio 1: 0.75 is configured in advance in the inside. Start the stirrer to mix the solution evenly at a speed of 300 rpm, and then carry out ammonium carbonization, that is, slowly introduce carbon dioxide gas with a mass ratio of 1:0.19 under the condition of stirring. The end point of carbonization is when the reaction liquid becomes neutral to slightly alkaline. Suction filtration obtained 89.29 kg of nano-active calcium carbonate, dr...

Embodiment 3

[0016] Embodiment 3: Mix 200 kilograms of calcium carbide slag and hydrochloric acid in the reactor according to the mass ratio of 1: 1.03, react to generate calcium chloride and water, filter cake and calcium chloride solution by suction filtration, and directly throw the filter cake into the incinerator Deep bury after incineration, get 300 kilograms of calcium chlorides and inject in the ammonium carbonizer as mother liquor after uniformly mixing with 10% surfactant, there is the ammoniacal liquor that the mass ratio 1: 1.15 is configured in advance in the inside. Start the stirrer to mix the solution evenly at a speed of 500 rpm, and then carry out ammonium carbonization, that is, slowly introduce carbon dioxide gas with a mass ratio of 1:0.59 under the condition of stirring. The end point of carbonization is when the reaction liquid becomes neutral to slightly alkaline. 270.27 kg of nano-active calcium carbonate was obtained by suction filtration, and various levels of se...

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Abstract

The invention discloses a method for preparing nano active calcium carbonate series products by carbide slag, which adopts a main technical proposal that: reacting carbide slag and hydrochloric acid to generate calcium chloride and water so as to obtain filter cake and calcium chloride solution; directly putting the filter cake into an incinerator for incineration and deep burying; intensively mixing the calcium chloride, ammonia and a surfactant according to certain proportion in an ammonium carbonizer; introducing carbon dioxide from a reactor until the finish of carbonization to obtain nano active calcium carbonate of various finenesses; and centrifuging, drying and winnowing to obtain calcium carbonate of various grades. The method reasonably avoids the defects of high cost, low productivity, complex production and equipment, and the like of the conventional method, forms the ammonium carbonization method with unique advantages and characteristics, and has the advantages of less investment, low cost, simple production and high yield.

Description

Technical field: [0001] The invention relates to a preparation method of inorganic salt nanomaterials, in particular to a method for manufacturing nano-active calcium carbonate series products and ammonium chloride from calcium carbide slag. technical background: [0002] At present, the main way to develop and manufacture nano-calcium carbonate is to use limestone to calcine, and then digest and reabsorb carbon dioxide with water to obtain it in a supergravity field or surface active treatment. It is basically one of the traditional production methods, and its disadvantages are high cost, low yield, complex production and equipment, etc. The present invention researches the method for manufacturing nano active calcium carbonate by ammonium carbonization on the basis of the traditional method. The advantages are low cost, small investment, simple production and large output, and can produce active calcium carbonate with various finenesses. It is a good way to develop nano-...

Claims

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Application Information

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IPC IPC(8): C01F11/18C01C1/16
Inventor 王嘉兴
Owner 王嘉兴
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