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Process for removing vanadium from crude titanium tetrachloride

A crude titanium tetrachloride and process technology, applied in the direction of titanium tetrachloride, titanium halide, etc., can solve the problem of residues affecting heat transfer and the like, and achieve the effect of simple preparation process

Pending Publication Date: 2020-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of the invention uses components rich in ideal vanadium removal to achieve an excellent vanadium removal effect on titanium tetrachloride, and solves the technical problem that a large amount of residues are generated to affect heat transfer when organic matter is used to remove vanadium in the existing process

Method used

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  • Process for removing vanadium from crude titanium tetrachloride
  • Process for removing vanadium from crude titanium tetrachloride

Examples

Experimental program
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Effect test

Embodiment 1

[0033]The catalytic cracking diesel in Table 1 is used as the raw material, the hydrogenation catalyst listed in Table 2 is used as the catalyst, and the catalyst is sulfided according to the conventional method before implementation. The raw material enters a hydrogenation reaction zone filled with a hydrogenation catalyst, and the hydrogenation reaction is carried out under the condition of hydrogen, and the liquid phase material obtained after fractional distillation of the reaction product is used as a vanadium removal reagent. The hydrogenation reaction process conditions are: reaction temperature 393°C, reaction pressure 10.0MPa, hydrogen to oil volume ratio 1100, volume space velocity 0.85h -1 . The properties of the obtained liquid phase material are specifically shown in Table 3.

Embodiment 2

[0035] The catalytic cracking diesel in Table 1 is used as the raw material, the hydrogenation catalyst listed in Table 2 is used as the catalyst, and the catalyst is sulfided according to the conventional method before implementation. The raw material enters a hydrogenation reaction zone filled with a hydrogenation catalyst, and the hydrogenation reaction is carried out under the condition of hydrogen, and the liquid phase material obtained after fractional distillation of the reaction product is used as a vanadium removal reagent. The hydrogenation reaction process conditions are: reaction temperature 400°C, reaction pressure 16.0MPa, hydrogen to oil volume ratio 1300, volume space velocity 1.0h -1 . The properties of the obtained liquid phase material are specifically shown in Table 3.

[0036] Table 3 Properties of liquid phase materials

[0037] Example 1 Example 2 Distillation range / ℃ >250 >250 Composition, wt% Paraffins 7.3 14.0 ...

Embodiment 3

[0039] The liquid phase material prepared in Example 1 is used as a vanadium removal reagent, and the vanadium removal of crude titanium tetrachloride is carried out in an evaporation tower. The evaporation tower has 15 trays, and the pressure at the top of the evaporation tower is 101KPa-110KPa. The crude titanium tetrachloride preheated to 135°C enters the 13th tray in the middle and lower part of the evaporation tower, and the vanadium removal composition heated to 362°C enters the third tray in the upper part of the evaporation tower. The mass ratio of vanadium removal reagent to crude titanium tetrachloride is 2.5:100. The two streams are countercurrently contacted in the evaporation tower to remove vanadium, and the steam at the top of the evaporation tower is condensed to be refined titanium tetrachloride, which is analyzed by ICP spectrometer, and the vanadium oxytrichloride content is less than 0.001wt%. The generated residue is discharged from the lower part of the ...

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Abstract

The invention discloses a process for removing vanadium from crude titanium tetrachloride. The process comprises the following steps: mixing catalytic slurry oil with hydrogen, carrying out hydrogenation reaction in the presence of a hydrogenation catalyst, separating the reaction effluent to obtain a liquid-phase material; and carrying out countercurrent contact between crude titanium tetrachloride and two streams of the liquid-phase material in an evaporation tower to carry out sufficient vanadium removal reaction. A composition, which is rich in ideal vanadium removing components is adoptedto achieve an excellent vanadium removal effect on titanium tetrachloride, and the technical problem that in the prior art, when an organic matter is used for removing vanadium, a large number of residues is generated, and heat transfer is affected is solved.

Description

technical field [0001] The invention belongs to the field of titanium tetrachloride refining, in particular to a process for removing vanadium from titanium tetrachloride. Background technique [0002] Titanium tetrachloride (TICl 4 ) is an important intermediate product in the production of titanium sponge and titanium dioxide. Unpurified industrial crude TiCl 4 It is a reddish-brown turbid liquid containing many impurities. The impurity components in crude titanium tetrachloride are very complex, among which vanadium is a main impurity element in crude titanium tetrachloride. It is represented by VOCl 3 form exists in it. VOCl 3 When it is reduced, the oxygen element may enter the sponge titanium at four times the concentration, resulting in an increase in the oxygen content in the sponge titanium, an increase in the Brinell hardness, and a degradation of the sponge titanium. In addition, the use of titanium tetrachloride with high vanadium content to produce titanium...

Claims

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Application Information

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IPC IPC(8): C01G23/02
CPCC01G23/024
Inventor 刘林东全辉张志银赵威孙国权
Owner CHINA PETROLEUM & CHEM CORP
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