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Polymerization process using separated flow

A polymerization method and monomer technology, which are applied in the methods of chemically changing substances by using atmospheric pressure, chemical instruments and methods, pressure vessels used in chemical processes, etc., and can solve problems such as undisclosed polymerization reactions.

Inactive Publication Date: 2005-09-14
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The introduction of a gas-liquid two-phase fluid or a gas-liquid-solid three-phase fluid into a tube to form separate streams is well known, as in the literature (Gas-Liquid Two Phase Flow Technique Handbook, "1. FlowRegime" ed. by The Japan Society Of Mechanical Engineers, 1989), but no one has disclosed the polymerization reaction carried out in a tubular reactor to form a separate stream

Method used

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  • Polymerization process using separated flow
  • Polymerization process using separated flow
  • Polymerization process using separated flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0151] Input raw material monomers (ethylene and 6-carbon alpha-olefin (4-methyl-1-pentene)) and Ziegler-type titanium prepolymerization catalyst into the tubular reactor (1 / 2B×40m steel pipe) (Containing 2000 g of pre-polymerized ethylene / 1 g of transition metal compound catalyst component), aluminum alkyl and n-decane, the raw material monomers are copolymerized under the following conditions.

[0152] Ethylene / α-olefin / n-decane: 83 / 11 / 6 (mole)

[0153] Gas linear velocity (reactor inlet): 30 m / s

[0154] Reaction temperature: 170℃

[0155] Reaction pressure: 1.568MPa(16kg / cm 2 ·F)

[0156] S / G ratio (volume flow ratio): 1.3×10 -3

[0157] S / G ratio (mass flow ratio): 0.05

[0158] Liquid phase (polymer liquid) concentration (reactor outlet): 80% by weight

[0159] Liquid phase (polymer liquid) viscosity (reactor outlet): 1,000 poise

[0160] In the above polymerization reaction, a gas-liquid separated stream is formed in the reaction tube.

[0161] Through the above polymeriza...

Embodiment 2

[0165] The polymerization reaction was performed in the same manner as in Example 1, except that the polymerization reaction conditions were changed as follows.

[0166] Ethylene / α-olefin / n-decane: 71 / 22 / 6 (mole)

[0167] Gas linear velocity (reactor inlet): 5 m / s

[0168] Reaction temperature: 155℃

[0169] Reaction pressure: 1.078MPa(11kg / cm 2 ·F)

[0170] S / G ratio (volume flow ratio): 1.0×10 -4

[0171] S / G ratio (mass flow ratio): 0.005

[0172] Liquid phase (polymer liquid) concentration (reactor outlet): 80% by weight

[0173] Liquid phase (polymer liquid) viscosity (reactor outlet): 100 poise

[0174] In the above polymerization reaction, a gas-liquid separated stream is formed in the reaction tube.

[0175] Through the above polymerization reaction, high-quality polyethylene can be obtained at the outlet of the reactor at a flow rate of 0.1 kg / hour, and 400,000 grams of polyethylene can be obtained per 1 gram of the transition metal compound catalyst component.

[0176] ...

Embodiment 3

[0179] In the tubular reactor (1 / 2B×25m+5 / 6B×15m steel pipe), input the raw material monomer (ethylene), the same prepolymerization catalyst as in Example 1, aluminum alkyl and n-decane, under the following conditions Copolymerize raw monomers.

[0180] Ethylene / n-decane: 81 / 19 (mole)

[0181] Gas linear velocity (reactor inlet): 15 m / s

[0182] Reaction temperature: 160℃

[0183] Reaction pressure: 0.784MPa(8kg / cm 2 ·F)

[0184] S / G ratio (volume flow ratio): 3.5×10 -5

[0185] S / G ratio (mass flow ratio): 0.0035

[0186] Liquid phase (polymer liquid) concentration (reactor outlet): 80% by weight

[0187] Liquid phase (polymer liquid) viscosity (reactor outlet): 500 poise

[0188] In the above polymerization reaction, a gas-liquid separated stream is formed in the reaction tube.

[0189] Through the above polymerization reaction, the polymer can be obtained in an amount of 146,000 g of polyethylene per 1 g of the transition metal compound catalyst component at the reactor outlet...

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Abstract

Disclosed is a polymerization process comprising feeding a monomer as a raw material, a polymerization catalyst, and optionally, an inert medium to a tubular reactor in a pressurized state; permitting a part of the raw material monomer and the inert medium fed to the reactor to form a gas phase and the remainder to form a liquid phase, so that both of the gas phase comprising the raw material monomer and / or the inert medium and the liquid phase comprising the raw material monomer and / or the inert medium are present in the reactor, wherein said liquid phase may contain a resulting polymer as a solid, and so that a gas-liquid separated flow or a gas-liquid-solid separated flow has the gas phase that is continuous in the direction of flow is formed in the reactor; and polymerizing the raw material monomer while carrying the liquid phase by the gas phase flow, wherein the ratio of a volume flow rate of the liquid phase to a volume flow rate of the gas phase at the outlet of the reactor is 0.00001 to 100,000. According to the polymerization process, polymerization can be accomplished with excellent thermal efficiency and small power energy, and besides various polymers can be produced.

Description

Technical field [0001] The present invention relates to a polymerization method using a separated stream. In the method, monomers as raw materials are polymerized in a tubular reactor while forming a gas-liquid separation stream or a gas-liquid-solid separation stream in the reactor. Background technique [0002] Various reactors such as container reactors, tubular reactors, tower reactors, fluidized bed reactors and special reactors are generally called reaction devices. [0003] These reactors should be appropriately selected according to the type of reaction, the nature of the desired product, and the like. For example, if the target reaction is a polymerization reaction, a vessel type reactor or a fluidized bed type reactor is generally used as the polymerization reactor. [0004] When a container reactor is used as the polymerization reactor, a liquid phase polymerization reaction using a solvent, such as solution (homogeneous) polymerization or slurry polymerization, is gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J3/04B01J19/00B01J19/24C08F2/00C08F4/64C08F4/649C08F10/00C08F10/02C08F210/16
CPCB01J3/042B01J19/0013B01J19/2415B01J2219/00094C08F210/16C08F10/02C08F2/00C08F2/06C08F210/14C08F2500/12C08F2500/08C08F2500/07
Inventor 坂本晃大上杉春洋
Owner MITSUI CHEM INC