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A combined type reaction temperature control method and device for olefin polymerization

A technology of reaction temperature and olefin polymerization, applied in chemical instruments and methods, chemical/physical/physicochemical processes, chemical/physical processes, etc. Problems such as temperature control operation of the external polymerization reactor to achieve the effect of increasing humidity, saving space and improving efficiency

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

AI Technical Summary

Problems solved by technology

However, this invention also does not have a water bath circulation system, and cannot perform temperature control operations on the external polymerization reactor. It can only perform simple operations in the water bath, and cannot realize the temperature-variable operation of the water bath in multiple temperature zones.

Method used

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  • A combined type reaction temperature control method and device for olefin polymerization

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Start the agitator 6, set the temperature of the constant temperature tank 4 to be 70°C, and the heater 7 starts heating. When the temperature of the constant temperature tank 4 reaches the set temperature, the heater 7 automatically stops heating, and the polymerization reaction 1 and the polymerization reaction 2 start to react;

[0026] Temperature control one: one of the circulation pipes 9 controls the temperature of the first polymerization reaction, the power of the circulation pump 11 is set at 30%, and the DCS system calculates the heating power of the secondary heater 12 according to the requirements of the first temperature control of the polymerization reaction, and the heated circulation The water passes through the circulation pipe 9 to control the first polymerization reaction, and the heat-exchanged circulating water enters the constant temperature tank 4 through the return pipe 8;

[0027] Temperature control 2: Another circulation pipe 9 controls the te...

Embodiment 2

[0030] Polymerization reaction 1: temperature control 70°C

[0031] Polymerization two: temperature control 70 ℃

[0032] Start the agitator 6, set the temperature of the constant temperature tank 4 to be 70°C, and the heater 7 starts heating. When the temperature of the constant temperature tank 4 reaches the set temperature, the heater 7 automatically stops heating, and the polymerization reaction 1 and the polymerization reaction 2 start to react;

[0033] Temperature control one: one of the circulation pipes 9 controls the temperature of the polymerization reaction one, the power of the circulation pump 11 is set at 60%, the DCS system sets the secondary heater 12 to not start, and the circulating water passes through the circulation pipe 9 to carry out the polymerization reaction one Control, the heat-exchanged circulating water enters the constant temperature tank 4 through the return pipe 8;

[0034] Temperature control 2: Another circulation pipe 9 controls the temper...

Embodiment 3

[0037] Polymerization reaction 1: temperature control 85°C

[0038] Polymerization two: temperature control 70 ℃

[0039] Start the agitator 6, set the temperature of the constant temperature tank 4 to be 70°C, and the heater 7 starts heating. When the temperature of the constant temperature tank 4 reaches the set temperature, the heater 7 automatically stops heating, and the polymerization reaction 1 and the polymerization reaction 2 start to react;

[0040] Temperature control one: one of the circulation pipes 9 controls the temperature of the first polymerization reaction, the power of the circulation pump 11 is set at 30%, and the DCS system calculates the heating power of the secondary heater 12 according to the requirements of the first temperature control of the polymerization reaction, and the heated circulation The water controls the polymerization reaction 1 through the circulation pipe 9, and the heat-exchanged circulating water enters the constant temperature tank ...

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Abstract

The invention relates to a combined type reaction temperature control method and device for olefin polymerization, and belongs to the technical field of chemical reaction temperature control. The device used in the method includes a constant-temperature bath. The constant-temperature bath is connected to an overflow pipe, a water supplementing box, a water supplementing pump and a water supplementing pipe in order to form a circulating loop. The bottom of the constant-temperature bath is connected to circulating pumps through a water discharging pipe. The upper part of one side of the constant-temperature bath is provided with a water return pipe. Each of the plurality of circulating pumps is connected to a secondary heater. The secondary heaters are connected to circulating pipes. ThroughDCS control, automatic reaction temperature control is achieved. The secondary heaters are designed in the circulating pipeline, and temperature control for a plurality of polymerization reactions atdifferent temperatures is achieved by one constant-temperature bath, thus saving space and increasing the efficiency. The method and the device also can achieve temperature control of a plurality ofpolymerization reactions at same temperatures. The method and the device are operated hermetically so that humidity of operating space is not increased.

Description

technical field [0001] The invention relates to a combined reaction temperature control method and device for olefin polymerization, belonging to the technical field of chemical reaction temperature control. Background technique [0002] Polyolefin is a kind of synthetic resin with excellent performance, which is widely used. The catalysts used in olefin polymerization mainly include Z-N type, chromium series, metallocene and other types. During the reaction process, a large amount of heat will be released, which needs to be removed in time to achieve stable control of the reaction temperature, so as to ensure the stable performance of polyolefin resin and improve the performance of polyolefin resin. product quality. In the current temperature control methods, one water bath corresponds to one reactor for temperature control, which will inevitably increase the space occupied by the equipment, resulting in waste of space and low efficiency. Moreover, when a reaction process...

Claims

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Application Information

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IPC IPC(8): B01J19/00
Inventor 周建勇李晓庆李留忠严婕李功韬徐晓范大鹏齐立芳
Owner CHINA PETROLEUM & CHEM CORP
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