Filter aid for improving washing efficiency and application thereof

A filter aid, beech technology, applied in other chemical processes, titanium oxide/hydroxide, titanium dioxide, etc., can solve the problems of easy mildew, cellulose deterioration and failure, and pulp storage time should not be too long, and achieve whiteness. Improve and reduce the loss of materials and the effect of shortening the washing time

Inactive Publication Date: 2019-01-18
JINAN YUXING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pulp should not be stored for too long, as it is prone to mildew and causes cellulose to deteriorate and fail

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of sulfuric acid method produces the technique of titanium dioxide, comprises the following steps:

[0033] 1. The operation of titanium ore crushing, acid hydrolysis, crystallization and concentration remains unchanged. The concentration index is the same as before, and the material is prepared for hydrolysis.

[0034] 2. The concentrated material is poured into the hydrolysis preheating tank, and the temperature is raised to the required temperature, 95°C. Start to configure the hydrolysis seed crystal, that is, the external seed crystal that can induce the hydrolysis reaction and speed up the hydrolysis speed. The stability of the seed crystal is required to be 100ml, and the prepared seed crystal is added to the preheated titanium liquid, and the titanium liquid with the seed crystal is put into the hydrolysis tank, heated to boiling, kept under pressure until the hydrolysis is completed, and the hydrolysis material enters the cooling tank , and at the same...

Embodiment 2

[0043] A kind of sulfuric acid method produces the technique of titanium dioxide, comprises the following steps:

[0044] 1. The operation of titanium ore crushing, acid hydrolysis, crystallization and concentration remains unchanged. The concentration index is the same as before, and the material is prepared for hydrolysis.

[0045]2. Put the concentrated material into the hydrolysis preheating tank and raise the temperature to 95°C. Start to configure the hydrolysis seed crystal, that is, the external seed crystal that can induce the hydrolysis reaction and speed up the hydrolysis speed. The stability of the seed crystal is required to be 100ml, and the prepared seed crystal is added to the preheated titanium liquid, and the titanium liquid with the seed crystal is put into the hydrolysis tank, heated to boiling, kept under pressure until the hydrolysis is completed, and the hydrolysis material enters the cooling tank , while adding the filter aid beech powder, the amount ...

Embodiment 3

[0054] A kind of sulfuric acid method produces the technique of titanium dioxide, comprises the following steps:

[0055] 1. The operation of titanium ore crushing, acid hydrolysis, crystallization and concentration remains unchanged. The concentration index is the same as before, and the material is prepared for hydrolysis.

[0056] 2. The concentrated material is poured into the hydrolysis preheating tank, and the temperature is raised to the required temperature of 95°C. Start to configure the hydrolysis seed crystal, that is, the external seed crystal that can induce the hydrolysis reaction and speed up the hydrolysis speed. The stability of the seed crystal is required to be 100ml, and the prepared seed crystal is added to the preheated titanium liquid, and the titanium liquid with the seed crystal is put into the hydrolysis tank, heated to boiling, kept under pressure until the hydrolysis is completed, and the hydrolysis material enters the cooling tank , and at the sa...

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PUM

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Abstract

The invention provides a filter aid for improving the washing efficiency and an application thereof. The filter aid and the application provided by the invention have the beneficial effects that the application is an application of beech powder as a filter aid in production of titanium dioxide by a sulfuric acid method, and after the filter aid is added into hydrolyzed metatitanic acid suspension,the washing-water penetration speed can be increased, the benefit for washing away soluble impurities such as iron can be achieved, the washing time can be shortened, the reduction of loss of metatitanic acid can be guaranteed and the yield can be increased; the novel filter aid replaces the previous precoating, or compared with no addition of the filter aid, the washing speed and effect are improved and the washing time is shortened by more than 2 hours; the water consumption is reduced and the water can be saved by about 5 cubes in every ton of water; the loss of the material is reduced andthe titanium utilization rate is increased; simultaneously, the product quality is also improved; for the prepared titanium dioxide, the whiteness is improved; not only can the requirements of national standards GB / T1706-2006 be met, but also the b value and deltaE color difference are reduced compared with the titanium dioxide prepared before the process is changed.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide production, and in particular relates to a filter aid for improving washing efficiency and application thereof. Background technique [0002] The production process of sulfuric acid rutile titanium dioxide is long and the process technology is complicated. It belongs to the field of fine chemical production and almost includes all inorganic chemical production units. For the production of sulfuric acid titanium dioxide, quality and yield are the key to process technology control. The fluctuation of job indicators and control measures will affect the quality and cost of the final product of titanium dioxide. Substances separated from post units in the production process, such as sedimentation, hot-press filtration, fine filtration, disc separation of ferrous iron, and water washing, will cause the loss of titanium, resulting in a decrease in yield. Among them, water washing is a large use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C01G23/053
CPCB01J20/24C01G23/053C01P2006/62C01P2006/64
Inventor 杨艳梅梁红斌李鑫许红宋凤娥
Owner JINAN YUXING CHEM
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