Method for treating titanium tetrachloride-containing waste liquid

A treatment method, the technology of titanium tetrachloride, which is applied in the direction of titanium dioxide, chlorine/hydrogen chloride, and chloride preparation, can solve the problems of difficult resource utilization and high cost, achieve long-term economic and social benefits, solve processing problems, and reduce cost effect

Active Publication Date: 2017-01-04
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of difficult resource utilization and high cost in the prior art when treating waste liquid containing titanium tetrachloride, and to provide a waste solution containing titanium tetrachloride that can easily realize resource utilization and low cost. liquid treatment method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment is used to illustrate the treatment method of the waste liquid containing titanium tetrachloride of the present invention.

[0044] With BCE catalyst mother liquor (3.4 tons) as the waste liquid containing titanium tetrachloride to be treated (wherein, the concentration of titanium tetrachloride is 1550mg / mL, the content of organic solvent is 10 volume %, described haloalkoxytitanium and alkane The concentration of titanium oxide was 10 mg / mL).

[0045] Add 4.6 tons of water to 3.4 tons of the above-mentioned BCE catalyst mother liquor and hydrolyze it at 90° C. for 1 h. The hydrogen chloride gas produced in the hydrolysis is absorbed with water (used as water for hydrogen chloride), and the hydrogen chloride content in the hydrolyzed material is 34% by weight. The concentration of titanium element calculated as titanium dioxide is 200mg / mL, which is a three-phase mixture of oil, water and solid; the mixture is subjected to distillation treatment (initia...

Embodiment 2

[0047] This embodiment is used to illustrate the treatment method of the waste liquid containing titanium tetrachloride of the present invention.

[0048] With NA / NX catalyst mother liquor (1 ton) as the waste liquid containing titanium tetrachloride to be treated (wherein, the concentration of titanium tetrachloride is 1400mg / mL, and the content of organic solvent is 15 volume %, and described halogenated alkoxy titanium and the concentration of titanium alkoxide is 20mg / mL).

[0049] Add 1.13 tons of water to 1 ton of the above-mentioned NA / NX catalyst mother liquor and hydrolyze it at 85°C for 2 hours. The hydrogen chloride gas generated during the hydrolysis is absorbed with water. The hydrogen chloride concentration in the hydrolyzed material is 8mol / L, and the titanium dioxide calculated as titanium dioxide The concentration of the element is 170mg / mL, which is a three-phase mixture of oil, water and solid; the mixture is subjected to distillation treatment (initial boil...

Embodiment 3

[0051] This embodiment is used to illustrate the treatment method of the waste liquid containing titanium tetrachloride of the present invention.

[0052] With NA / NX catalyst mother liquor (2.5 tons) as to-be-treated waste liquid containing titanium tetrachloride (wherein, the concentration of titanium tetrachloride is 1400mg / mL, and the content of organic solvent is 15 volume %, described halogenated alkoxy titanium and the concentration of titanium alkoxide is 20mg / mL).

[0053] Add 2.1 tons of water to 2.5 tons of the above-mentioned NA / NX catalyst mother liquor (containing 0.6 tons of the water phase distilled from Example 2, and the content of hydrogen chloride in the mixed water is 20% by weight) and hydrolyze at 50°C for 10h, then hydrolyze Hydrogen chloride gas produced in the process is absorbed with water, and the hydrogen chloride content in the material after hydrolysis is 32% by weight, and the concentration of titanium element in terms of titanium dioxide is 180m...

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Abstract

The invention relates to a method for treating titanium tetrachloride-containing waste liquid. The waste liquid comprises titanium tetrachloride, an organic solvent and halogenated alkoxy titanium and/or titanium alkoxide. The method comprises a step (1) of contacting the titanium tetrachloride-containing waste liquid with water to perform hydrolysis; a step (2) of distilling the hydrolysed waste liquid, and after an oil phase is evaporated by 20 volume% or above, a titanium-containing compound is collected from remaining materials. Through the method, resource treatment of the polyolefin production waste liquid can be performed simply, not only can the industrial waste treatment problem in the polyolefin catalyst production process be solved, but also the polyolefin catalyst production cost is reduced; useful materials in the polyolefin production waste liquid can be recycled to facilitate reutilization, and thus the method has long-term economic and social benefits.

Description

technical field [0001] The invention relates to a treatment method for waste liquid containing titanium tetrachloride. Background technique [0002] In the industrial production process of polyolefins, Ziegler-Natta catalysts are mainly used at present. In the preparation process of the usual Ziegler-Natta catalyst, a large amount of titanium tetrachloride needs to be used, and the excess ratio is very large. Therefore, in the production process of polyolefin catalysts, after separation and precipitation of catalyst solids, a large amount of titanium-containing mother liquor will be produced. In addition to unreacted titanium tetrachloride, this mother liquor may also contain hydrocarbon organic solvents, halogenated alkoxy titanium Or components such as titanium alkoxide. [0003] The method of rectification is usually used to separate titanium-containing mother liquor: under the condition of atmospheric batch rectification, due to the difference in boiling point of diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053C01B7/03
Inventor 秦金来丁钢陈群王龙耀李永旭冯超于连杰陈丹萍
Owner CHINA PETROLEUM & CHEM CORP
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