Method for treating titanium-containing waste liquid produced by polyolefin catalyst

A polyolefin catalyst and treatment method technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, neutralized water/sewage treatment, etc. The effect of transportation and processing cost saving

Inactive Publication Date: 2013-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention: the present invention provides a treatment method for the production of titanium-containing waste liquid by polyolefin catalyst, by using solid calcium hydroxide to react with the hydrolyzate of the titanium-containing waste liquid after initial steaming to generate a A solid residue to solve the problem of using NaOH to neutralize the hydrolyzate of titanium-containing waste liquid in the prior art to produce a large amount of wastewater containing titanium oxide compounds and organic pollutants, which increases the difficulty of subsequent wastewater treatment

Method used

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  • Method for treating titanium-containing waste liquid produced by polyolefin catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Add 124g of water into the hydrolysis kettle, and then slowly add 62g of titanium-containing waste liquid after preliminary distillation and recovery of part of titanium tetrachloride into the hydrolysis kettle. The hydrolysis kettle adopts a water jacket to cool down, and controls the addition rate of titanium-containing waste liquid so that the reaction temperature during hydrolysis does not exceed 70°C. 62g lime (Ca(OH) 2 ) powder is directly and slowly added to the kneader, and then the acidic hydrolyzate obtained in the first step is transferred to the kneader through the pipeline for neutralization. The kneader uses a water jacket to cool down, so that the reaction temperature does not exceed 70°C during neutralization. After the neutralization reaction is completed, 248g of solid residue is finally formed, which can be further disposed of.

Embodiment 2

[0025] Add 100 g of water into the hydrolysis tank, and then slowly add 200 g of titanium-containing waste liquid after preliminary distillation and recovery of part of titanium tetrachloride into the hydrolysis tank. The hydrolysis kettle adopts a water jacket to cool down, and controls the addition rate of titanium-containing waste liquid so that the reaction temperature during hydrolysis does not exceed 80°C. 100 g lime (Ca(OH) 2 ) powder is directly and slowly added to the screw mixer, and then the acidic hydrolyzate obtained in the first step is transferred to the screw mixer through the pipeline for neutralization. The spiral mixer uses a water jacket to cool down, so that the reaction temperature does not exceed 70°C during neutralization. After the neutralization reaction is completed, 400g of solid residue is finally formed, which can be further disposed of.

Embodiment 3

[0027] Add 120g of water into the hydrolysis kettle, and then slowly add 40g of titanium-containing waste liquid after preliminary distillation and recovery of part of titanium tetrachloride into the hydrolysis kettle. The hydrolysis kettle adopts a water jacket to cool down, and controls the addition rate of titanium-containing waste liquid so that the reaction temperature during hydrolysis does not exceed 70°C. 40g lime (Ca(OH) 2 ) powder is directly and slowly added to the kneader, and then the acidic hydrolyzate obtained in the first step is transferred to the kneader through the pipeline for neutralization. The kneader uses a water jacket to cool down, so that the reaction temperature does not exceed 80°C during neutralization. After the neutralization reaction is completed, 200g of solid residue is finally formed, which can be further disposed of.

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Abstract

The invention discloses a method for treating a titanium-containing waste liquid produced by a polyolefin catalyst, belonging to the sewage treatment field. The method comprises the following process steps: (1) mixing the titanium-containing waste liquid and water according to the weight ratio of 1:0.5-1:3wt, carrying out hydrolytic treatment to obtain hydrolysate, and adding lime powder (Ca(OH)2) into a reactor; and (2) transforming the hydrolysate in the step (1) into the reactor to carry out neutral reaction with the lime powder (Ca(OH)2), and controlling the proportion of the lime powder (Ca(OH)2) and original titanium-containing waste liquid, so that the lime powder (Ca(OH)2) is reacted with the hydrolysate to form solid slag. With the adoption of the method, the solid lime powder (Ca(OH)2) is used as an alkali neutralizer, the needed water amount of an alkali liquor prepared by the conventional method is saved, the final waste treatment amount is reduced, waste discharge amount is reduced, and the final treatment product is the solid slag which can be further treated according to solid waste; relative to the waste liquid, the solid waste slag is convenient to transport; and treatment is carried out by adopting the conventional means such as burning and embedding in a follow-up treatment manner, so that the treatment cost is saved.

Description

technical field [0001] The invention belongs to the field of industrial waste liquid treatment, and relates to a treatment method for titanium-containing waste liquid produced by polyolefin catalysts, and more particularly to a treatment method for titanium-containing waste liquid produced in the production process of polyolefin catalysts. Background technique [0002] In the polyolefin industry, the most widely used Ziegler-Natta catalyst is a high-efficiency magnesium chloride carrier catalyst based on magnesium chloride, which mainly uses magnesium chloride as the carrier, titanium tetrachloride as the active component, and internal and external electron donors. composition. As we all know, in the preparation process of Ziegler-Natta catalyst, a large amount and excessive amount of titanium tetrachloride need to be used, so in addition to the output catalyst product, a large amount of titanium-containing mother liquor will be produced in the production process, which cont...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/66
Inventor 李正琪程学文万国晖李昕阳李海龙
Owner CHINA PETROLEUM & CHEM CORP
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