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Method and system for removing vanadium from crude titanium tetrachloride

A technology of crude titanium tetrachloride and organic matter, which is applied in the chemical industry, can solve the problems that affect the continuous and stable operation of the refining system, and the superheater is easy to foul, so as to avoid the formation of fouling, reduce cleaning operations, and ensure stable operation Effect

Active Publication Date: 2021-07-23
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of using organic matter to remove vanadium from crude titanium tetrachloride, the organic matter is in VOCl 3 and TiCl 4 A large amount of viscous solids are generated under the catalytic action, which makes the superheater easy to foul, and the superheater needs to be cleaned frequently, which affects the continuous and stable operation of the refining system

Method used

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  • Method and system for removing vanadium from crude titanium tetrachloride
  • Method and system for removing vanadium from crude titanium tetrachloride

Examples

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Effect test

Embodiment 1

[0044] A method for removing vanadium, comprising the steps of:

[0045] Add fatty acid and polymerization inhibitor PI-70 in mixing tank, control the consumption ratio of polymerization inhibitor PI-70 and fatty acid to be 10g:1L, fully stir it and make it mix uniformly, obtain the first mixed solution;

[0046] Afterwards, in the first mixed solution input circulation tank by pump, control its feed rate to be 60kg / h, add thick titanium tetrachloride liquid in the circulation tank simultaneously, control its feed rate to be 8000kg / h, to The two are mixed to obtain a second mixed solution;

[0047] Afterwards, the second mixed liquid is pumped into the superheater for heat treatment, and the outlet temperature of the tube side of the superheater is controlled to be 155° C., and the pressure is 0.35 MPa, so that the organic matter and the vanadium in the crude titanium tetrachloride liquid Impurities are reacted to obtain a mixture containing vanadium-removed mud;

[0048] Af...

Embodiment 2

[0051] A method for removing vanadium, comprising the steps of:

[0052] Add fatty acid and polymerization inhibitor PI-70 in mixing tank, control the consumption ratio of polymerization inhibitor PI-70 and fatty acid to be 20g:1L, fully stir it and make it mix uniformly, obtain the first mixed liquor;

[0053] Afterwards, in the first mixed solution input circulation tank by pump, control its feed rate to be 60kg / h, add thick titanium tetrachloride liquid in the circulation tank simultaneously, control its feed rate to be 8000kg / h, to The two are mixed to obtain a second mixed solution;

[0054] Afterwards, the second mixed liquid is pumped into the superheater for heat treatment, and the outlet temperature of the tube side of the superheater is controlled to be 155° C., and the pressure is 0.35 MPa, so that the organic matter and the vanadium in the crude titanium tetrachloride liquid Impurities are reacted to obtain a mixture containing vanadium-removed mud;

[0055] Afte...

Embodiment 3

[0058] A method for removing vanadium, comprising the steps of:

[0059] Add fatty acid and triphenyl phosphite in mixing tank, control the consumption ratio of triphenyl phosphite and fatty acid to be 40g:1L, fully stir it and make it mix evenly, obtain the first mixed solution;

[0060] Afterwards, in the first mixed solution input circulation tank by pump, control its feed rate to be 60kg / h, add thick titanium tetrachloride liquid in the circulation tank simultaneously, control its feed rate to be 8000kg / h, to The two are mixed to obtain a second mixed solution;

[0061] Afterwards, the second mixed liquid is pumped into the superheater for heat treatment, and the outlet temperature of the tube side of the superheater is controlled to be 160° C., and the pressure is 0.32 MPa, so that the organic matter and the vanadium in the crude titanium tetrachloride liquid Impurities are reacted to obtain a mixture containing vanadium-removed mud;

[0062] Afterwards, spray the mixtu...

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Abstract

The invention discloses a method and system for removing vanadium from crude titanium tetrachloride, and the method comprises the following steps: mixing an organic matter for removing vanadium with an inhibitor to obtain a first mixed solution; mixing the first mixed solution with a crude titanium tetrachloride solution to obtain a second mixed solution; using a superheater for heating the second mixed liquid, so that the organic matter reacts with vanadium impurities in the crude titanium tetrachloride liquid; and separating the reacted material to obtain vanadium-removed titanium tetrachloride, wherein the inhibitor is used for inhibiting the reaction product of the organic matter and the vanadium impurity from further forming a viscous solid through a polymerization reaction. According to the vanadium removal method and system, formation of scaling substances in the superheater can be inhibited, the operation cycle of the vanadium removal process is prolonged, and stable and smooth operation of the vanadium removal process is guaranteed.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method and system for removing vanadium from crude titanium tetrachloride. Background technique [0002] The production process of titanium dioxide by chloride method has gradually become the mainstream process of domestic titanium dioxide production because of its environmental protection technology and excellent product quality. Refined titanium tetrachloride is an important intermediate raw material for the production of titanium dioxide or sponge titanium by the chloride method, and the refining process of crude titanium tetrachloride is the key link in the production of refined titanium tetrachloride. During the refining process of crude titanium tetrachloride, vanadium impurities in the crude titanium tetrachloride need to be removed. [0003] In the process of using organic matter to remove vanadium from crude titanium tetrachloride, the organic matter is in VOCl 3 and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/02
CPCC01G23/024C01P2006/80Y02P10/20
Inventor 黄森虹李良王建鑫
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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