White mineral oil for polyolefin catalyst

A technology of polyolefin catalyst and white mineral oil, applied in the field of catalyst diluent, can solve the problems of lack of dispersibility, catalyst deactivation, filter screen clogging, etc.
CN101418052AInactive Publication Date: 2009-04-29SHANGHAI RONGTIAN TRADE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI RONGTIAN TRADE
Publication Date
2009-04-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides white mineral oil which is used for diluting and / or dispersing a polyolefin catalyst. The white mineral oil mainly comprises the following components: 30 to 40 weight percent of cyclane and 60 to 70 weight percent of paraffin which are counted by the total weight of the white mineral oil. The content of aromatic hydrocarbon in the white mineral oil is counted no higher than 0.05 weight percent by the total weight of the white mineral oil. In addition, the average molecular weight of the white mineral oil is between 450 and 650. The white mineral oil has good dispersibility and can maintain the activity of the polyolefin catalyst.
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Description

technical field

[0001] The present invention relates to a catalyst diluent, more particularly to a polyolefin catalyst diluent. Background technique

[0002] White mineral oil is a special mineral oil obtained through deep refining to remove impurities such as aromatics, sulfur and nitrogen. It is generally composed of alkanes and naphthenes with a molecular weight of 250-400, and is a lubricating oil fraction. It is colorless, tasteless, odorless, chemically inert and has excellent light and heat stability.

[0003] White mineral oil (ie, white mineral oil, white oil) is often used as a diluent for catalysts, especially polyolefin polymerization catalysts. For example, white mineral oil is usually used as the catalyst diluent in the polypropylene unit of the loop process. The method used is to prepare the mixture of white mineral oil and vaseline oil in proportion to a certain viscosity, and disperse the main catalyst for polymerization in it. The quality of white minera...

Claims

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