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Coarse TiCl4 filtering method

A filter method and filter element technology, applied in the direction of titanium halide, etc., can solve the problems of high production cost of cloth bag static pressure filter, hazards to operators and surrounding environment, and unguaranteed filter quality, so as to achieve excellent permeability and anti-corrosion Good washing effect and high production efficiency

Inactive Publication Date: 2007-03-28
ZUNYI TITANIUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Crude TiCl 4 Cloth bag static pressure filtration will cause great harm to the operator and the surrounding environment when the filter cloth is replaced
Crude TiCl 4 Bag static pressure filtration not only has high production cost, but the filtration quality cannot be guaranteed, intermittent operation, low operation efficiency, and serious environmental pollution
People have been eager to solve this technical problem, and have designed and tested many different schemes (including ceramic microporous filters, etc.), but the results are not good, and they have not been adopted in production.

Method used

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  • Coarse TiCl4 filtering method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Use TiAl intermetallic compound tubular filter membrane as the filter element, the membrane area is 0.02m 2 , the filtration pressure is 0.14Mpa, and the filtration is suspended after 30 minutes of filtration, using TiCl 4 The filtrate is used as backwashing agent, the backwashing pressure is 0.18MPa, the backwashing time is 5 seconds, and the filtration is resumed, and the continuous operation is 6 days, the volume ratio of filtrate / retentate is 9:1, and the filtration rate reaches 2.31m 3 m -2 h -1 , The solid content of the filtrate is less than 0.1%.

Embodiment 2

[0023] Use TiAl intermetallic compound tubular filter membrane as the filter element, the membrane area is 0.16m 2 , the filtration pressure is 0.17Mpa, the filtration time is 60 minutes, and the filtration is suspended. Dry air is used as the backwashing agent. The backwashing pressure is 0.21MPa. 8:1, filtration rate up to 2.18m 3 m -2 h -1 , The solid content of the filtrate is less than 0.1%.

Embodiment 3

[0025] Use TiAl intermetallic compound tubular filter membrane as the filter element, the membrane area is 0.34m 2 , the filtration pressure is 0.18Mpa, and the filtration is suspended after 90 minutes of filtration, using dry air and TiCl 4 The filtrate is used as backwashing agent, that is, gas-liquid mixed backwashing, the backwashing pressure is 0.21Mpa, and the filtration is resumed after backwashing for 30 seconds. It runs continuously for one month, the volume ratio of filtrate / retentate is 10:1, and the filtration rate reaches 2.46m 3 m -2 h -1 , The solid content of the filtrate is less than 0.1%.

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Abstract

The invention provides a course TiCl4 filtering method, using TiAl intermetalic compound tubular filter membrane as filtering component, and the filtering course mainly comprises two steps of course TiCl4 filtering and regularly stripping, controlling the pressure range of course TiCl4 filtering at 0.10-0.20MPa, filtering course TiCl4 liquid flow through a filtering device with the TiAl intermetalic compound filter membrane so as to obtain high-grade filtrate, , stopping filtering after 30-90 min, stripping with stripping agent to remove suspended solid accumulated on the membrane, discharging the obtained entrapped matters into a densifier for settlement separation and after the stripping ends, resuming filtering, where the stripping pressure is higher than the filtering pressure and the stripping time is 5-30 s, the stripping can use TiCl4 filtrate as stripping agent, dry air, nitrogen gas, or argon gas as stripping agent, and the gas-liquid mixture of TiCl4 filtrate and dry air (nitrogen gas, or argon gas) as stripping agent.

Description

technical field [0001] The present invention relates to industrial TiCl 4 production, especially involving TiCl 4 Crude TiCl during production 4 filter materials and methods. Background technique [0002] TiCl 4 It is an intermediate material for the production of sponge titanium and titanium dioxide, and the crude TiCl obtained by reducing chlorination with high titanium slag 4 The liquid contains a large amount of AlCl 3 , FeCl 3 , MgCl 2 Such as solid impurities, must be filtered to remove solid suspended matter before refining with physical methods (distillation and rectification) and chemical methods. At present, the crude TiCl in industry 4 After filtration, according to the possible conditions of the prior art, the solid-to-liquid ratio is generally required to be less than 0.5%. Crude TiCl 4 The current method of liquid filtration is bag hydrostatic filtration. For example, a factory uses a pressure filter, which is equipped with 4 to 5 filter tubes, with Φ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/02
Inventor 王学文龚仕成程代松朱卫平赵友超
Owner ZUNYI TITANIUM
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