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Method for preparing poly-alpha-olefin high-molecular polymer from coal-to-olefin and application of poly-alpha-olefin high-molecular polymer

A high-molecular polymer and coal-to-olefin technology, which is applied in the fields of hydrocarbon oil treatment, gas/liquid distribution and storage, and only multi-stage series refining process treatment, can solve the problems of molecular chain breakage and molecular weight reduction, and achieve anti-corrosion The effect of improving shear performance

Pending Publication Date: 2022-03-04
沈阳宏城精细化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the drag reduction effect of polymer drag reducer is related to its molecular weight. High molecular weight drag reducer is very easy to reduce its molecular weight due to the breakage of molecular chains, which leads to the breakage of molecular chains. This is what is commonly called shear. cut degradation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 A kind of polyalpha-olefin polymer produced by coal-to-olefin

[0022] The preparation method is as follows:

[0023] 1. Mixture of C8α-olefins and alkanes:

[0024] Rectification: The coal-to-olefins containing a mixture of C6~C14α-olefins and alkanes are passed through the rectification tower (Shanghai Dayou DYH251 sieve tray tower) at a flow rate of 8L / h, the temperature of the tower is controlled at 70°C, and the top of the tower is heated at 2L / h. The h flow rate is the cut of C8 that carbon number is 8 through outlet rectification;

[0025] Refining: The C8 fraction obtained by rectification flows through the reactor equipped with catalyst alumina at a flow rate of 1L / h (the alumina is placed in the reactor in the form of a fixed bed), and the temperature of the reactor is controlled at 220°C for chemical reaction , after removing oxygen-containing compounds, a refined mixture of C8 α-olefins and alkanes with a carbon number of 8 is obtained.

[0026]...

Embodiment 2

[0033] Example 2 A kind of polyalpha-olefin polymer produced by coal-to-olefin

[0034] The preparation method is as follows:

[0035] 1. Mixture of C6α-olefins and alkanes:

[0036] Rectification: The coal-to-olefins containing a mixture of C6~C14α-olefins and alkanes are passed through the rectification tower (Shanghai Dayou DYH251 sieve tray tower) at a flow rate of 8L / h, the temperature of the tower is controlled at 30°C, and the top of the tower is heated at 2L / h. The h flow rate is the cut of C6 that carbon number is 6 through outlet rectification;

[0037] Refining: The C6 fraction obtained by rectification flows through the reactor equipped with catalyst alumina at a flow rate of 1L / h (alumina is placed in the reactor in the form of a fixed bed), and the temperature of the reactor is controlled at 220°C for chemical reaction , after removing oxygen-containing compounds, a refined mixture of C6α-olefins and alkanes with a carbon number of 6 is obtained.

[0038] 2. C...

Embodiment 3

[0043] Example 3 A kind of polyalpha-olefin polymer produced by coal-to-olefin

[0044] The preparation method is as follows:

[0045] 1. Mixture of C7α-olefins and alkanes:

[0046] Rectification: The coal-to-olefins containing a mixture of C6-C14α-olefins and alkanes are passed through the rectification tower (Shanghai Dayou DYH251 sieve tray tower) at a flow rate of 8L / h. h flow rate is the cut of C7 that carbon number is 7 through outlet rectification;

[0047] Refining: The C7 fraction obtained by rectification flows through a reactor equipped with catalyst alumina at a flow rate of 1L / h (alumina is placed in the reactor in the form of a fixed bed), and the temperature of the reactor is controlled at 230°C for chemical reaction , after removing oxygen-containing compounds, a refined mixture of C7α-olefins and alkanes with a carbon number of 7 is obtained.

[0048] 2. C9 α-olefin and alkane mixture: the method is the same as in Example 1.

[0049] 3. Mixture of C13α-ol...

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Abstract

The invention relates to a method for preparing a poly-alpha-olefin high-molecular polymer from coal-to-olefin and application of the poly-alpha-olefin high-molecular polymer. The preparation method comprises the following steps: adding a mixture of alpha-olefin with carbon numbers of C6, C7, C8, C9, C10, C11, C12, C13 and / or C14 from coal-to-olefin and alkane into a polymerization kettle, then adding a main catalyst and a cocatalyst into the polymerization kettle, controlling the reaction temperature to be between-15 DEG C and 5 DEG C, stirring and reacting for 1-12 hours, and cooling to obtain the target product poly-alpha-olefin high-molecular polymer. According to the method, the contradiction between the molecular weight and shear degradation of the drag reduction copolymer is solved, coal-to-olefin is selected as a polymer, a Ziegler-Natta system catalyst is selected as an initiation catalyst of a polymerization reaction, and the molecular weight of the drag reduction copolymer is reduced by controlling the number of alpha-olefin carbon atoms, the dosage of a cocatalyst and a main catalyst, the polymerization reaction temperature and the like. Therefore, the optimal resistance reduction and anti-shearing effects are achieved.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a method for preparing a polyalpha-olefin polymer drag reducer from coal-based olefins. Background technique [0002] Drag reducer is a chemical additive used in crude oil pipeline transportation. It can reduce the flow resistance by suppressing the turbulence of oil products in the flow, effectively increase the pipeline transportation volume, reduce the pipeline pressure, save energy, and improve the efficiency of pipeline operation. Safety factor, reduce production cost. The use of drag reducing agent to save energy and increase transportation is an important process to effectively solve the problem of crude oil pipeline transportation at this stage. [0003] The drag reduction effect of polymer drag reducer is related to a series of factors such as molecular weight distribution, the absolute value of the highest molecular weight and the proportion of correspondi...

Claims

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Application Information

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IPC IPC(8): C08F210/14C10G53/02F17D1/17
CPCC08F210/14C10G53/02F17D1/17C10G2300/1037Y02P20/52
Inventor 张廼文曲连国谢强
Owner 沈阳宏城精细化工科技有限公司
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