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Olefin polymerization reactor

A technology of olefin polymerization and reactor, which is applied in the field of reactors, can solve problems such as researches on variable-diameter kettles and expansion sections, etc., and achieve the effects of improving heat removal capacity, large production capacity, and low stirring power

Inactive Publication Date: 2012-02-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above patents are all aimed at the liquid-solid two-phase loop reactor, but for the slurry entrainment problem of the widely used gas-liquid-solid three-phase slurry stirred tank reactor, there is no research on the variable diameter tank and the expansion section.

Method used

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  • Olefin polymerization reactor
  • Olefin polymerization reactor
  • Olefin polymerization reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] as attached figure 1 Shown, a kind of olefin polymerization reactor comprises:

[0048] Polymerizer still body 1 is made up of reaction section 1a, expansion section 1c and connection section 1b between reaction section 1a and expansion section 1c;

[0049] The stirring device 2 installed in the center of the polymerization kettle body 1 is used to realize the three-phase mixing of gas, liquid and solid in the kettle. The stirring device 2 is composed of a transmission device 2a, a stirring shaft 2b and a stirring turbine 2c connected in sequence;

[0050] A gas distribution device 3 located in the reactor body 1 of the polymerizer for dispersing the raw material gas passing into the reactor;

[0051] A baffle 4 for enhancing the mixing effect in the kettle near the inner wall surface of the reaction section 1a of the polymerization kettle;

[0052] The slurry external circulation system 5 located outside the reaction section 1a of the polymerization tank is used for ...

Embodiment 2

[0065] The cold mold device was established in the laboratory, and the gas-liquid-solid three-phase slurry entrainment cold mold experiment was carried out in four stirred tanks with different diameters of the enlarged sections.

[0066] 1# stirred tank is an ordinary stirred tank without expansion section and connecting section, its structure is as attached figure 2 As shown, it includes: a vertical cylindrical polymerization kettle body 1, a stirring device 2 installed in the center of the polymerization kettle body 1 for realizing the three-phase mixing of gas, liquid and solid in the kettle, and the stirring device 2 is composed of sequentially connected transmission devices 2a, a stirring shaft 2b and a stirring turbine 2c; a gas distribution device 3 located in the polymerization kettle body 1 for dispersing the raw material gas fed into the kettle; The baffle plate 4 of mixing effect; the baffle plate 4 is a straight baffle plate. The inner diameter of the vertical cy...

Embodiment 3

[0088] The cold mold device was established in the laboratory, and the gas-liquid-solid three-phase slurry entrainment cold mold experiment was carried out in two stirred tanks with different expansion sections.

[0089] 3# stirred tank is the 3# stirred tank in embodiment 1, and what use is vertical cylindrical expansion section 1c and inverted conical connection section 1b, and enlarged section 1c internal diameter is 1.73 times of reaction section 1a internal diameter; 5# The stirring tank is attached Figure 4 As shown, except that the spherical top expansion section 1c (a kind of curved cylinder) is used, the diameter of the spherical part is the same as the inner diameter of the 3# stirred tank expansion section 1c, and the expansion section 1c is tangent to the connecting section 1b, other structures are the same as 3# stirring tank is the same. The inner diameter and height of the reaction section 1a and the inclination angle of the connecting section 1b of the two ar...

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Abstract

The invention discloses an olefin polymerization reactor. The reactor comprises a polymerization kettle body, a stirring device, a feeding port and an overflowing port, wherein the polymerization kettle body is composed of a reaction segment, an enlargement segment, and a connection segment located between the reaction segment and the enlargement segment; the stirring device is arranged at the center inside the polymerization kettle body, is used for stirring raw materials in the kettle, and is composed of a transmission device, a stirring shaft and a stirring turbine which are sequentially connected; the feeding port is arranged on the side wall of the reaction segment of the polymerization kettle body and is used for adding solvent, catalyst and the like; and the overflowing port is used for discharging the slurry and controlling the liquid level in the kettle. By using the reactor, the entrainment can be effectively reduced.

Description

technical field [0001] The invention relates to the field of reactors, in particular to an olefin polymerization reactor used for olefin slurry polymerization. Background technique [0002] Polyolefin is an important branch of synthetic resin and the most important product of modern petrochemical industry. The processes of olefin polymerization mainly include slurry method, gas phase method, solution method and so on. [0003] The slurry method has been widely used because of its early industrialization time, mature technology and good product quality. The most representative slurry ethylene polymerization process is Mitsui Petrochemical's stirred tank low-pressure slurry process for producing high-density and medium-density polyethylene (CX process for short). The process controls the molecular weight, molecular weight distribution and density of the product by changing the arrangement of two polymerization tanks (parallel or series), changing operating conditions and add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F2/01
Inventor 阳永荣王靖岱黄正梁胡雨晨蒋斌波吴德荣王江义张斌李勇殷大斌贾中明朱宇飞张擎何乐路蒋云涛
Owner CHINA PETROLEUM & CHEM CORP
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