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Catalyst solvent recovery method and titanium-containing solid

A recycling method and catalyst technology, applied in chemical recycling, chemical instruments and methods, titanium halide, etc., can solve the problems of difficult treatment of waste water and waste residue, and achieve the effect of improving recycling rate and reducing solvent consumption.

Pending 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

[0004] Under the current increasingly stringent environmental protection pressure, the above-mentioned wastewater and waste residues are more difficult to deal with

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach

[0068] According to another embodiment of the present invention, the processing of the distillation raffinate comprises the following steps:

[0069] (i) send the titanium tetrachloride catalyst mother liquor containing titanium tetrachloride catalyst mother liquor that produces in the preparation process of titanium-based polyolefin catalyst into the mother liquor crude fractionation column and carry out distillation, the tower top obtains crude solvent, and the tower still obtains containing titanium tetrachloride and high boiler The first tower kettle logistics;

[0070] (ii) the crude solvent obtained in step (i) enters a hydrocarbon solvent rectification tower for rectification, the first recovery solvent is obtained at the top of the tower, and the second tower bottom stream is obtained in the tower bottom;

[0071] (iii) the first tower still stream that step (i) obtains enters the titanium tetrachloride rectifying tower, and the tower top obtains the titanium tetrachlo...

Embodiment 1

[0097] This embodiment is used to illustrate catalyst solvent recovery method of the present invention, comprises the following steps:

[0098] (i) Catalyst mother liquor is sent into the mother liquor crude fractionation tower and carries out distillation, and tower top obtains crude solvent, and the tower bottom is the first tower still stream that contains titanium tetrachloride, high boiler and catalyst fine powder;

[0099] (ii) the crude solvent obtained in step (i) enters a hydrocarbon solvent rectification tower for rectification, the first recovery solvent is obtained at the top of the tower, and the second tower bottom stream is obtained in the tower bottom;

[0100] (iii) the first tower still stream that step (i) obtains enters the titanium tetrachloride rectifying tower, and the tower top obtains the titanium tetrachloride product, and the tower still obtains the third tower still stream;

[0101] (iv) mixing the second tower still stream with the third tower stil...

Embodiment 2

[0108] This embodiment is used to illustrate the method for catalyst solvent recovery of the present invention, comprises the following steps:

[0109] (i) Catalyst mother liquor is sent into the mother liquor crude fractionation tower and carries out distillation, and tower top obtains crude solvent, and the tower bottom is the first tower still stream that contains titanium tetrachloride, high boiler and catalyst fine powder;

[0110] (ii) the crude solvent obtained in step (i) enters a hydrocarbon solvent rectification tower for rectification, the first recovery solvent is obtained at the top of the tower, and the second tower bottom stream is obtained in the tower bottom;

[0111] (iii) the first tower still stream that step (i) obtains enters the titanium tetrachloride rectifying tower, and the tower top obtains the titanium tetrachloride product, and the tower still obtains the third tower still stream;

[0112] (iv) mixing the second tower still stream with the third to...

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Abstract

The invention relates to a catalyst solvent recovery method and a titanium-containing solid. The method comprises the following steps: (1) the mother liquor containing a titanium tetrachloride catalyst is sent into a mother liquor coarse separation tower to obtain a coarse solvent at the top of the tower and a first tower kettle material flow at the bottom of the tower; (2) the crude solvent enters a hydrocarbon solvent rectifying tower, a first recovered solvent is obtained at the tower top, and a second tower kettle material flow is obtained at the tower kettle; (3) the first tower kettle material flow enters a titanium tetrachloride rectifying tower, a titanium tetrachloride product is obtained at the tower top, and a third tower kettle material flow is obtained at the tower kettle; (4) mixing the second tower kettle material flow and the third tower kettle material flow to obtain slurry containing titanium tetrachloride; and (5) the slurry containing titanium tetrachloride enters a dry distillation kettle for distillation, a second recovered solvent is obtained at the top of the tower kettle, and distillation raffinate is obtained at the bottom of the tower kettle; and solid-liquid separation treatment is carried out on at least one of the titanium tetrachloride-containing catalyst mother liquor, the titanium tetrachloride-containing slurry and the distillation residual liquid. By adopting the catalyst solvent recovery method provided by the invention, no wastewater is generated in the catalyst production process, and the catalyst solvent recovery method has obvious environmental protection and social benefits.

Description

technical field [0001] The invention belongs to the field of industrial solvent recovery, and more specifically relates to a catalyst solvent recovery method and a titanium-containing solid. 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 rem...

Claims

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Application Information

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IPC IPC(8): B01D3/14C01G23/02
CPCB01D3/143C01G23/024Y02P20/584
Inventor 马冬王毅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
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