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Method for preparing white carbon black/titanium dioxide composite material by utilizing potassium feldspar

A technology of titanium dioxide and composite materials, applied in the directions of titanium dioxide, silicon dioxide, titanium oxide/hydroxide, etc., can solve the problems of low utilization rate of natural light of photocatalyst, complicated preparation process, low utilization rate of raw materials, etc. Catalytic efficiency, simple process, and the effect of improving utilization

Inactive Publication Date: 2017-06-09
LUOYANG LVREN ENVIRONMENTAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Titanium dioxide is widely used in the photocatalytic industry because of its high stability, photocatalytic function, and low cost. However, in the actual preparation of photocatalytic TiO 2 , because it is extremely easy to agglomerate, difficult to recycle and there is still TiO 2 The defects of photocatalysts such as low utilization rate of natural light restrict TiO 2 Catalytic efficiency of photocatalyst
The way to solve the above problems is usually to use the TiO 2 The photocatalyst is loaded on a suitable carrier material to increase the photocatalytic rate of titanium dioxide, the preparation process is cumbersome, and the utilization rate of raw materials is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The present embodiment provides a kind of method that utilizes potassium feldspar to prepare white carbon black / titanium dioxide composite material, and specific steps comprise:

[0024] Step 1. Add potassium feldspar, ammonium fluoride, and concentrated sulfuric acid into the converter reactor in sequence, and react at 200°C and autogenous pressure to generate gas and solid residue. The reaction principle is:

[0025] NH 4 F =2HF↑ + NH 3 ↑ ,

[0026] 2K[AlSi 3 o 8 ] + 24HF + 4H 2 SO 4 =K 2 SO 4 +Al 2 (SO 4 ) 3 + 6SiF 4 + 16H 2 O ,

[0027] Among them, the mass ratio of potassium feldspar, ammonium fluoride, and concentrated sulfuric acid is 1:3.5:4; the concentrated sulfuric acid is concentrated sulfuric acid with a mass fraction of 98%;

[0028] Step 2, at a temperature of 10°C and under negative pressure conditions, in the gas absorption tower, pass the gas generated in step 1 into ammonia water with a mass fraction of 25%, and simultaneously add tit...

Embodiment 2

[0035] The present embodiment provides a kind of method that utilizes potassium feldspar to prepare white carbon black / titanium dioxide composite material, and concrete steps are roughly the same as in embodiment 1, and difference is:

[0036] Step 1. Add potassium feldspar, ammonium fluoride, and concentrated sulfuric acid into the converter reactor in sequence, and react at 250°C and autogenous pressure to generate gas and solid residue. The reaction principle is:

[0037] NH 4 F =2HF↑ + NH 3 ↑ ,

[0038] 2K[AlSi 3 o 8 ] + 24HF + 4H 2 SO 4 =K 2 SO 4 +Al 2 (SO 4 ) 3 + 6SiF 4 + 16H 2 O ,

[0039]Among them, the mass ratio of potassium feldspar, ammonium fluoride, and concentrated sulfuric acid is 1:3.5:4; the concentrated sulfuric acid is concentrated sulfuric acid with a mass fraction of 98%. After the solid residue is leached by a sulfuric acid solution with a mass fraction of 10% at a temperature of 110°C, ammonia water is added to the leaching solution to ...

Embodiment 3

[0042] The present embodiment provides a kind of method that utilizes potassium feldspar to prepare white carbon black / titanium dioxide composite material, and concrete steps are roughly the same as in embodiment 1, and difference is:

[0043] Step 3: Pass the mixture into the spray reaction tower for atomization for 35 seconds, control the atomization temperature to 95°C, and atomize the particle size to 5-100 microns, and obtain the atomized particles after recovery and drying, and then the The atomized particles were placed in a calcination furnace for high-temperature calcination at a temperature of 1000° C. for 6 hours to obtain a white carbon black / titanium dioxide composite material.

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Abstract

The invention relates to a method for preparing a white carbon black / TiO2 composite material from potassium feldspar. The method comprises the following steps: the potassium feldspar, NH4F and concentrated sulfuric acid are taken as the raw materials for preparation of SiF4, then SiF4 is absorbed by ammonia water, TiCl4 is added to the ammonia water simultaneously, so that TiCl4 and SiF4 can be hydrolyzed simultaneously, a hydrolysis product is aged, filtered, washed, dried and subjected to high-temperature calcination, and the white carbon black / TiO2 composite material is prepared. According to the method, the obtained white carbon black / TiO2 composite material has excellent photocatalysis performance under both ultraviolet light and visible light while the potassium feldspar resources are used sufficiently, the preparation process is simple, and the utilization rate of the raw materials is high.

Description

technical field [0001] The invention relates to a method for preparing a titanium dioxide composite material, in particular to a method for preparing a white carbon black / titanium dioxide composite material by using potassium feldspar. Background technique [0002] Titanium dioxide is widely used in the photocatalytic industry because of its high stability, photocatalytic function, and low cost. However, in the actual preparation of photocatalytic TiO 2 , because it is extremely easy to agglomerate, difficult to recycle and there is still TiO 2 The defects of photocatalysts such as low utilization rate of natural light restrict TiO 2 Catalytic efficiency of photocatalysts. The way to solve the above problems is usually to use the TiO 2 The photocatalyst is loaded on a suitable carrier material to increase the photocatalytic rate of titanium dioxide, but the preparation process is cumbersome and the raw material utilization rate is low. [0003] Precipitated silica is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053C01B33/12C05C3/00
CPCC01B33/12C01G23/053C05C3/00
Inventor 肖建军许道立刘改正张国峰
Owner LUOYANG LVREN ENVIRONMENTAL EQUIP