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Method for treating titanium-containing waste liquid

A titanium waste liquid and waste liquid technology, which is applied in the field of treating titanium-containing waste liquid, can solve the problems of complex processing process, increased processing cost, consumption, etc., and achieve the effect of reducing the processing process

Active Publication Date: 2021-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of this process is that a large amount of acid water containing various organic substances is produced during the hydrolysis process, which is then neutralized with alkali, and finally a large amount of waste water and waste residue need to be further treated, because many catalyst manufacturers themselves do not have relevant treatment. conditions and qualifications, it is necessary to outsource the processing of related acid slag, so it is facing increasingly serious environmental and economic pressures
[0006] Although the above-mentioned prior art reduces the generation of acid water to a certain extent, the obtained solid waste still contains a small amount of water and a large amount of organic matter, and the follow-up still needs to adopt the current common The method is further processed, and the processing flow is complicated; and due to the need to neutralize the HCl in the reaction, a large amount of Ca(OH)2 will be consumed, which also causes an increase in processing costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] Preparation of polyethylene catalyst components: In the reactor fully replaced by high-purity nitrogen, add 4.0g magnesium dichloride, toluene 80ml, epichlorohydrin 4.0ml, tributyl phosphate 4.0ml, ethanol 6.4ml, and stir The temperature was raised to 70° C., and when the solid was completely dissolved to form a uniform solution, the reaction was carried out at 70° C. for 1 hour. Cool down to 30°C, add 4.8ml of diethylaluminum chloride with a concentration of 2.2M dropwise, and maintain the reaction at 30°C for 1 hour. The system was cooled to -25°C, 40ml of titanium tetrachloride was slowly added dropwise, and the reaction was stirred for 0.5 hours. The treated inert carrier was added, and the reaction was stirred for 0.5 hours. Then 3ml of tetraethoxysilane was added and reacted for 1 hour. Slowly heat up to 85°C and react for 2 hours. Stop stirring, let it stand, the suspension will separate quickly, remove the supernatant, wash twice with toluene, wash four times...

Embodiment 1

[0039] Add 50ml of methanol and 50ml of glycerol into the reaction kettle with cooling system, gradually add 500ml of titanium-containing waste liquid under stirring conditions, keep the reaction temperature below 50°C, and absorb the HCl generated during the process with lime water after it is discharged from the tail gas After the reaction, the obtained alcoholysis product is directly subjected to subsequent incineration treatment (both can be directly used for incineration, and can also be incinerated after neutralization by adding a required amount of alkaline substances such as lime powder).

Embodiment 2

[0041] Add 50ml of ethanol to the reaction kettle with cooling system, and gradually add 500ml of titanium-containing waste liquid under stirring conditions to keep the reaction temperature below 65°C. The HCl generated during the process is exhausted from the tail gas and then absorbed by water. After the reaction, the resulting alcoholysis The waste is directly processed for subsequent incineration (it can be directly used for incineration, or it can be neutralized by adding a required amount of alkaline substances such as lime powder and then incinerated).

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PUM

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Abstract

The invention belongs to the field of industrial waste liquid treatment, and relates to a method for treating titanium-containing waste liquid. The titanium-containing waste liquid is titanium tetrachloride-containing waste liquid generated in the preparation process of a titanium polyolefin catalyst, and the method comprises the following steps: (1) mixing the titanium-containing waste liquid with an alcohol compound to carry out an alcoholysis reaction, so as to obtain an alcoholysis product; wherein the volume ratio of the alcohol compound to the titanium-containing waste liquid is 0.05-15: 1; and (2) carrying out incineration treatment on the alcoholysis product obtained in the step (1). According to the titanium-containing waste liquid treatment method, the treatment process can be obviously shortened, waste water and waste residues generated in the catalyst titanium-containing waste liquid treatment process are greatly reduced, and obvious environmental protection and social benefits are achieved.

Description

technical field [0001] The invention belongs to the field of industrial waste liquid treatment, and more specifically relates to a method for treating titanium-containing waste liquid. Background technique [0002] In the industrial production of polyolefins, titanium-based catalysts have been widely used due to their high catalytic efficiency and low price. A commonly used method for preparing this type of catalyst is: firstly prepare a magnesium solution, for example, prepare a magnesium solution with magnesium or a magnesium compound and a related solvent in the presence of a hydrocarbon additive, and then make the magnesium solution with a halogen-containing compound such as tetrachloride Titanium reaction to prepare magnesium-supported catalyst, during which various accelerators can be added for modification. In the above-mentioned catalyst preparation process, it is usually necessary to wash the obtained solid catalyst component with a hydrocarbon solvent to remove un...

Claims

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Application Information

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IPC IPC(8): C02F1/00F23G7/04
CPCC02F1/00F23G7/04
Inventor 王毅马冬郭子芳苟清强贾凡李颖黄庭杨红旭曹昌文俸艳芸安京燕
Owner CHINA PETROLEUM & CHEM CORP