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Olefin batch polymerization technology

A polymerization process and olefin technology, which is applied in the field of olefin polymerization, can solve problems such as inconvenient polymerization operation, and achieve the effects of simple device modification, low investment cost, and improvement of isotactic index.

Inactive Publication Date: 2019-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, although the batch polymerization of olefins is not as harsh as the requirements of the continuous polymerization process on the fine powder produced during the catalyst polymerization process, a large amount of fine powder produced by the polymer during the batch polymerization process will also cause some inconvenience to the polymerization operation

Method used

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  • Olefin batch polymerization technology
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Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0058] This preparation example prepares the solid catalyst component A of the present invention with reference to the catalyst component preparation method of CN1718595A and the carrier preparation method of Example 4.

[0059] In a stirred 350mL glass reaction bottle, add 50mL hexane and 50mL titanium tetrachloride, cool down to -20°C; add 7g magnesium chloride alcoholate spherical particles (carrier), heat up to 40°C for 5 hours, and maintain at 40°C After 0.5 hours, the liquid was filtered off; then, 100 mL of titanium tetrachloride and a certain amount of di-n-butyl phthalate (DNBP, the mol ratio of DNBP / magnesium was 1 / 8) were added, the temperature was raised to 100 ° C, and at 100 After maintaining ℃ for 2 hours, filter off the liquid; add 50mL hexane and 50mL titanium tetrachloride, raise the temperature to 80℃, and filter off the liquid after maintaining at 80℃ for 0.5 hours; add 100mL titanium tetrachloride, and heat up to 120℃ , and maintained at 120°C for 0.5 hour...

preparation example 2

[0061] This preparation example prepares the solid catalyst component B of the present invention with reference to Example 1 of CN102838697A.

[0062] (1) Preparation of dialkoxymagnesium carrier

[0063] After the 16L pressure-resistant reactor with a stirrer was fully replaced with nitrogen, 10200 mL of ethanol, 300 mL of 2-ethylhexanol, 12 g of iodine and 8 g of magnesium chloride were added to the reactor to dissolve them. After stirring, the temperature was raised until the reflux temperature of the reaction system was reached; then 640 g of magnesium powder was added successively, and the reaction was carried out until no hydrogen gas was discharged. Then it is washed, separated and dried to obtain a dry dialkoxymagnesium carrier.

[0064] (2) Preparation of solid catalyst component

[0065] Take 650g of the above-mentioned dialkoxymagnesium carrier, 3250mL of toluene, and 130mL of di-n-butyl phthalate (DNBP) to prepare a suspension for use; in a 16L pressure-resistant...

Embodiment 1

[0067] This example is used to illustrate the olefin batch polymerization process of the present invention.

[0068] The catalyst is a propylene polymerization catalyst developed by China Petroleum & Chemical Corporation, specifically, the main catalyst is the solid catalyst component A prepared in Preparation Example 1.

[0069] In the pre-complexation reactor 1, under the protection of nitrogen atmosphere, 8 mL of anhydrous hexane, 5 mL of triethylaluminum in hexane (concentration of 0.5 mmol / mL) and 1 mL of methylcyclohexyldimethoxy The hexane solution (concentration is 0.1mmol / mL) of base silane, the stirring speed of pre-complexation reactor 1 is controlled at 200 revs / min, the temperature in regulation pre-complexation reactor 1 is 10 ℃, then add the preparation example 1 The main catalyst is 10mg, and the pre-complexation time of the three agents is controlled to be less than 1min to obtain a pre-complex catalyst.

[0070] Then, the pre-complex catalyst is passed into ...

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Abstract

The invention belongs to the field of olefin polymerization, and particularly provides an olefin batch polymerization technology. The olefin batch polymerization technology comprises the steps that (1) a main catalyst, an activator and an optional external electron donor are added into a pre-compounding reaction kettle for a pre-compounding reaction, and thus a pre-compounding catalyst is obtained; (2) the pre-compounding catalyst and prepolymerization olefin are added into a prepolymerization reaction kettle for a prepolymerization reaction, and thus a prepolymerization catalyst is obtained;and (3) the prepolymerization catalyst and polymerization olefin are added into a polymerization kettle for a polymerization reaction, and thus polyolefin is obtained. According to the olefin batch polymerization technology, the pre-compounding reaction kettle and the prepolymerization reaction kettle are introduced to conduct the pre-compounding reaction and the prepolymerization reaction of thecatalyst, thus the isotactic index of the obtained polyolefin is increased, and the melt index is maintained at a high level.

Description

technical field [0001] The invention belongs to the field of olefin polymerization, and in particular relates to a batch olefin polymerization process. Background technique [0002] China's refinery gas and propylene resources are very rich, but the refinery site layout is relatively scattered, making full use of these precious propylene resources is an important issue, and the batch liquid phase bulk polypropylene technology is developed on the basis of such raw materials ( See: Hong Dingyi, Polypropylene-Principle Process and Technology (First Edition) [M], Beijing: Sinopec Press, 2002, p359). [0003] Batch bulk polypropylene technology is a production technology successfully developed by China. It has reliable production technology, low requirements on the quality of raw material propylene, and domestically guaranteed catalysts. It has simple process, low investment, quick return, simple operation, and high-quality products Brand conversion is flexible, the three wastes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F110/06C08F2/00C08F2/01C08F4/649
CPCC08F10/00C08F110/06C08F2/00C08F2/01C08F4/6494C08F2500/15C08F2500/12
Inventor 夏先知张天一刘月祥赵瑾
Owner CHINA PETROLEUM & CHEM CORP
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