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Method for preparing white carbon black by using waste bauxite, diatomite and oil shale residue

A technology of oil shale slag and diatomite, which is applied to the removal of solid waste, silicon oxide, silicon dioxide, etc., can solve the problems of environmental pollution and low comprehensive utilization rate, and achieve the goal of reducing operating costs and production costs Effect

Inactive Publication Date: 2011-05-11
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing white carbon black by adopting waste bauxite after extracting aluminum, diatomite waste filter residue discharged from fine chemical production plant sulfonate unit or oil shale residue after acid leaching treatment, Solve the problems of environmental pollution and low comprehensive utilization rate of such waste materials

Method used

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  • Method for preparing white carbon black by using waste bauxite, diatomite and oil shale residue
  • Method for preparing white carbon black by using waste bauxite, diatomite and oil shale residue
  • Method for preparing white carbon black by using waste bauxite, diatomite and oil shale residue

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Effect test

Embodiment 1

[0032] Take the bauxite with high Si content after acid leaching to extract aluminum, put it into a muffle furnace for calcination at 700°C for 2h, and cool it down to room temperature naturally. Weigh 30 g of the pretreated bauxite into a three-necked flask, add 150 mL of 5 mol / L NaOH solution, raise the temperature to the boiling point with stirring, keep slightly boiling, and react with alkali for 3 h. Take out the alkali leaching product, cool down naturally to 50-80°C, carry out hot filtration, collect the filtrate, and obtain the water glass mother liquor. Take the filter residue, add water according to the solid-liquid volume ratio of 1:2, boil for 12 minutes, filter after cooling, collect the lotion, and wash the filter residue twice. Mix the lotion with the mother liquor to obtain a water glass solution. Adopt titration method to measure the molar concentration of Si in the above-mentioned water glass solution, according to the Si content in the concentration of gain...

Embodiment 2

[0037]The bauxite with high Si content after acid leaching and extraction of aluminum was taken, put into a muffle furnace for calcination at 650°C for 3h, and cooled naturally to room temperature. Weigh 30 g of the pretreated bauxite into a three-necked flask, add 120 mL of 4 mol / L NaOH solution, raise the temperature to the boiling point with stirring, keep slightly boiling, and react with alkali leaching for 3.5 h. Take out the alkali leaching product, cool down naturally to 50-80°C, carry out hot filtration, collect the filtrate, and obtain the water glass mother liquor. Take the filter residue, add water according to the solid-liquid volume ratio of 1:2, boil for 14 minutes, filter after cooling, collect the lotion, and wash the filter residue twice. Mix the lotion with the mother liquor to obtain a water glass solution. Adopt titration method to measure the molar concentration of Si in the above-mentioned water glass solution, according to the Si content in the concentr...

Embodiment 3

[0040] Take the bauxite with high Si content after acid leaching to extract aluminum, put it into a muffle furnace for calcination at 700°C for 2h, and cool it down to room temperature naturally. Weigh 50 g of pretreated bauxite into a three-necked flask, add 160 mL of 6 mol / L NaOH solution, raise the temperature to the boiling point under stirring, keep slightly boiling, and react with alkali for 3 h. Take out the alkali leaching product, cool down naturally to 50-80°C, carry out hot filtration, collect the filtrate, and obtain the water glass mother liquor. Take the filter residue, add water according to the solid-liquid volume ratio of 1:2, boil for 13 minutes, filter after cooling, collect the lotion, and wash the filter residue twice. Mix the lotion with the mother liquor to obtain a water glass solution. Adopt titration method to measure the molar concentration of Si in the above-mentioned water glass solution, according to the Si content in the concentration of gained ...

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Abstract

The invention relates to a method for preparing white carbon black by using waste bauxite, diatomite and oil shale residue, which can solve the problems of environmental pollution and low comprehensive utilization rate of waste materials of the type. The method comprises the following steps: firstly, conducting alkaline leaching, weighing the bauxite, the diatomite or the oil shale residue after acid leaching treatment, adding NaOH solution, heating to boiling point, conducting alkaline leaching reaction in a micro-boiling state, and hot filtering a product after alkaline leaching to obtain water glass mother liquid; taking filter residue, adding water, boiling, filtering after cooling, washing, collecting washing liquid, and mixing the washing liquid with the water glass mother liquid toobtain water glass solution; carbonating, diluting the solution, taking the water glass solution, and adding liquid dispersing agent with the amount of 1-20% of solution mass; introducing CO2 gas at the temperature of 20-70 DEG C to change the solution into solid-liquid mixture, and stopping the introducing of the CO2 gas when the pH value of the mixture is 9.0-10.5; obtaining filtrate and the filter residue after filtering; washing the filter residue by using diluted hydrochloric acid, and repeatedly washing the filter residue by using clear water until the pH value of the washing liquid is neutral; and conducting drying treatment on the washed filter residue; and crushing and grinding the dried filter residue to obtain the white carbon black.

Description

technical field [0001] The invention belongs to the field of chemical waste utilization, in particular to a method for preparing white carbon black from waste bauxite, diatomite and oil shale slag. Background technique [0002] Silica, also known as hydrated silica (SiO 2 ·nH 2 O), because the hydroxyl group on its structure is easy to combine with the chemical bond of organic matter, it has the characteristics of high temperature resistance, non-combustion, porosity, high surface activity and large specific surface area, and can be used as an excellent reinforcing agent for rubber and plastics, and an ideal pesticide. Carriers, thickeners, thixotropic agents and anti-settling agents for paints and inks are important chemical raw materials and are widely used in many industrial fields such as rubber, paint, medicine, and papermaking. [0003] my country's proven reserves of bauxite resources are about 2.3 billion tons, ranking fifth in the world. After the aluminum is ext...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12B09B3/00
Inventor 孙彤王秀丽彭晓琳
Owner BOHAI UNIV