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A method for co-producing aluminum sulfate, white carbon black and ammonium fluoride

A technology of aluminum sulfate and ammonium fluoride, which is applied in the direction of aluminum sulfate, ammonium halide, aluminum sulfur compounds, etc., can solve the problems of polluting environmental resources, ineffective use of silicon dioxide, and waste, so as to save energy and reduce production costs , post-processing simple effects

Active Publication Date: 2015-11-18
LIAONING PETROCCHEM VOCATIONAL & TECH COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The production of aluminum sulfate requires a certain pressure and has high requirements for equipment; the remaining residue after the reaction is discarded, and the silicon dioxide in it is not effectively used, which not only pollutes the environment but also causes a waste of resources

Method used

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  • A method for co-producing aluminum sulfate, white carbon black and ammonium fluoride

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The reactant 3 is according to the following proportions: get 100g of bauxite crushed to 60 mesh (according to 35.7% for alumina and 46.8% for silicon dioxide), add 142.7g of fluorite (calculate for 85.2% for calcium fluoride), fluorite Also pulverize to 60 mesh, and then add 277.7g of sulfuric acid solution with a mass fraction of 92% according to the reaction relationship between alumina, calcium fluoride and sulfuric acid.

[0021] Such as figure 1 As shown, the reactant 3 is placed in the closed reactor 2, the stirrer 5 is turned on to stir the solution, the heater 1 is turned on to heat the solution, and the temperature of the solution is kept at 100-125°C, and the gas generated by the reaction passes through the condenser 6 to the gas In the receiver 7, the gas receiver 7 contains an absorption liquid 8 (984.3 g of 25% ammonium bicarbonate solution). When no bubbles appeared in the gas receiver 7, turn off the heater 1 to stop heating, and turn off the stirrer 5 ...

Embodiment 2

[0036] Reactant 3 is according to the following proportioning: get 90g and pulverize to 60 mesh bauxite (according to 35.7% for aluminum oxide, 46.8% for silicon dioxide), add 130g fluorite (according to 85.2% for calcium fluoride), fluorite also Grind to 60 mesh, and then add 250 g of sulfuric acid solution with a mass fraction of 92% according to the reaction relationship between alumina, calcium fluoride and sulfuric acid.

[0037] Such as figure 1 As shown, the reactant 3 is placed in the closed reactor 2, the stirrer 5 is turned on to stir the solution, the heater 1 is turned on to heat the solution, and the temperature of the solution is kept at 100-125°C, and the gas generated by the reaction passes through the condenser 6 to the gas In the receiver 7, the gas receiver 7 contains an absorption liquid 8 (890 g of 25% ammonium bicarbonate solution). When no bubbles appeared in the gas receiver 7, turn off the heater 1 to stop heating, and turn off the stirrer 5 to stop s...

Embodiment 3

[0044] Reactant 3 is according to the following proportioning: get 110g and pulverize to 60 mesh bauxite (according to 35.7% for aluminum oxide, 46.8% for silicon dioxide), add 160g fluorite (according to 85.2% for calcium fluoride), fluorite also Grind to 60 mesh, and then add 300 g of sulfuric acid solution with a mass fraction of 92% according to the reaction relationship between alumina, calcium fluoride and sulfuric acid.

[0045] Such as figure 1 As shown, the reactant 3 is placed in the closed reactor 2, the stirrer 5 is turned on to stir the solution, the heater 1 is turned on to heat the solution, and the temperature of the solution is kept at 100-125°C, and the gas generated by the reaction passes through the condenser 6 to the gas In the receiver 7, the gas receiver 7 contains an absorption liquid 8 (1080 g of 25% ammonium bicarbonate solution). When no bubbles appeared in the gas receiver 7, turn off the heater 1 to stop heating, and turn off the stirrer 5 to stop...

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Abstract

The invention discloses a method for coproducing aluminium sulfate, white carbon black and ammonium fluoride. The method is characterized in that monohydrallite, fluorite and sulfuric acid are used as raw materials and react in the same reactor at a certain temperature; aluminium oxide in the monohydrallite reacts with the sulfuric acid to generate aluminium sulfate and silicon dioxide, the fluorite reacts with the sulfuric acid to generate hydrogen fluoride and calcium sulfate, the hydrogen fluoride and the silicon dioxide react to generate silicon tetrafluoride, and the silicon tetrafluoride is absorbed by a ammonium hydrogen carbonate solution to generate the white carbon black and the ammonium fluoride. According to the invention, the method has the following effects: two original production technologies and two sets of production devices are combined, so that the production cost is lowered; the reaction is conducted at the normal pressure, so that the requirements for the production devices are lowered; the monohydrallite reacts with the sulfuric acid to release heat which supplies power for the reaction of the fluorite and the sulfuric acid, so that the energy is saved; the dumped silicon dioxide is fully used; a sinking agent doesn't need to be added, so that the post-processing is simple.

Description

technical field [0001] The invention relates to a method for co-producing aluminum sulfate, white carbon black and ammonium fluoride. In particular, it relates to a method for co-producing aluminum sulfate, white carbon black and ammonium fluoride by utilizing bauxite, fluorite and sulfuric acid. Background technique [0002] Aluminum sulfate white solid, molecular composition Al 2 (SO 4 ) 3 16H 2 O; white carbon black is water and silicon dioxide, white powder, molecular composition SiO 2 ·nH 2 O, where nH 2 O exists in the form of surface hydroxyl groups; ammonium fluoride is a white solid, and the molecular composition is NH 4 F. At present, the industrial production of aluminum sulfate is based on bauxite and sulfuric acid as raw materials. Under certain temperature and pressure, the alumina in the bauxite reacts with sulfuric acid to form aluminum sulfate. After the reaction, a polyacrylamide sedimentation agent is added to the aluminum sulfate solution to sett...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/74C01B33/12C01C1/16
Inventor 邸万山
Owner LIAONING PETROCCHEM VOCATIONAL & TECH COLLEGE