Scrubber, washing device, and method for purifying polyolefin catalyst

The technology of a polyolefin catalyst and a washing device, which is applied in the field of separation and purification, can solve the problems of long washing time, large amount of solvent and low washing efficiency, and achieve the effects of short washing time, small amount of solvent and high washing efficiency.

Active Publication Date: 2018-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to overcome the defects of long washing time, low washing efficiency and large amount of solvent used in the existing process of purifying polyolefin catalysts, and provide a scrubber and washing machine capable of short washing time, high washing efficiency and small amount of solvent. Apparatus and method for purifying polyolefin catalysts

Method used

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  • Scrubber, washing device, and method for purifying polyolefin catalyst
  • Scrubber, washing device, and method for purifying polyolefin catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The washing device comprises 4 aforementioned scrubbers connected in series in succession, so that the material (flow rate is 0.4kg / h) enters the washing device from the feed inlet of the second chamber of the first scrubber (after washing, it is discharged from the last scrubber) The third chamber of the washer is discharged from the discharge port), and at the same time, normal hexane (flow rate is 30kg / h) enters the washing device from the feed port of the first chamber of the last scrubber (after being contacted with the material and washed from the first The third chamber of a scrubber is discharged by the discharge port), and the contact time of each scrubber in the scrubber for the material and normal hexane is 3h. After the material is washed, the content of the polyolefin catalyst in the washed material is measured. The content was 43.1% by weight, and the titanium content was 0.23 mg / mL.

Embodiment 2

[0042] The washing device comprises 3 aforementioned scrubbers connected in series in succession, so that the material (flow rate is 0.5kg / h) enters the washing device from the feed port of the second chamber of the first scrubber (after washing, it is washed from the last scrubber) The third chamber of the washer is discharged from the discharge port), and at the same time, normal hexane (flow rate is 25kg / h) enters the washing device from the feed port of the first chamber of the last scrubber (after contacting with the material and washing, from the first The third chamber of a scrubber is discharged by the discharge port), and the contact time of each scrubber in the scrubber for the material and normal hexane is 4h. After the material is washed, the content of the polyolefin catalyst in the washed material is measured. The content was 41.7% by weight, and the titanium content was 0.27 mg / mL.

Embodiment 3

[0044] The washing device comprises 6 aforementioned scrubbers connected in series in succession, so that the material (flow rate is 1kg / h) enters the washing device from the feed inlet of the second chamber of the first scrubber (after washing, from the last scrubber) The third chamber is discharged by the discharge port), and at the same time, normal hexane (flow rate is 30kg / h) enters this washing device from the feed inlet of the first chamber of the last scrubber (after contacting and washing with the material, from the first The third chamber of each scrubber is discharged from the discharge port), the contact time of the material and n-hexane in each scrubber in the washing device is 2h, after the material is washed, the content of polyolefin catalyst in the washed material is measured. It was 42.5% by weight, and the content of titanium was 0.31 mg / mL.

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Abstract

The invention discloses a scrubber, a washing device and a method for purifying a polyolefin catalyst, belonging to the field of separation and purification. The scrubber comprises a first cavity, a second cavity and a third cavity separated by a first separator plate and a second separator plate, wherein the first separator plate is provided with a plurality of small holes allowing materials in the first cavity to pass through but preventing most of materials in the second cavity from entering the first cavity; the bottom of the second separator plate is provided with an opening; the first cavity and the second cavity are respectively provided with a feed inlet; a separating mechanism is arranged in the third cavity and can separate washed materials from a washing agent through extruding;and the third cavity is also provided with at least two discharge outlets used for respectively discharging the washed materials and the washing agent from discharge outlets of the scrubber. The method provided by the invention has the advantages of short washing time, high impurity recovery rate and low solvent usage amount, and can realize dynamically circulating and continuous washing and purifying.

Description

technical field [0001] The invention relates to the field of separation and purification, in particular to a scrubber, a scrubber and a method for purifying a polyolefin catalyst. Background technique [0002] The polyolefin industry is an important symbol of the development of a country's petrochemical industry. Since the new century, the production capacity of the world's polyolefin industry has increased substantially, and the world market is in a state of oversupply. In this situation, only by intensifying research and development efforts and mastering and adopting new process conditions can we effectively reduce costs and improve the added value and competitiveness of the industry. [0003] In the new century, with the pressure of environmental protection and the increasingly tense trend of energy, the green environmental protection in catalyst production has become more important. Developing green and environment-friendly production processes, making full use of ener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F10/02C08F4/64C08F4/651B01D11/00
CPCB01D11/00C08F10/00C08F10/02C08F4/64C08F4/651
Inventor 孙汝柳过良王宇飞王婧
Owner CHINA PETROLEUM & CHEM CORP
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