Method for preparing poly-alpha-olefin in continuous manner

An olefin and continuous technology, applied in chemical instruments and methods, processing hydrocarbon oil, production of liquid hydrocarbon mixtures, etc., can solve problems such as demanding control of process parameters, increasing process operation complexity, and long process time

Active Publication Date: 2015-02-25
上海翔威环境科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these processes reported in the prior art cannot achieve ideal conversion and selectivity, and the products often contain a large proportion of by-products, which require subsequent distillation operations, resulting in a linear increase in costs
Another disadvantage of the prior art is that the requirements for the control of process parameters are often very strict, which further increases the complexity of process operations
The third disadvantage of the prior art is that it is often necessary to adopt a batch method to carry out the polymerization reaction, which requires a long process time

Method used

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  • Method for preparing poly-alpha-olefin in continuous manner
  • Method for preparing poly-alpha-olefin in continuous manner
  • Method for preparing poly-alpha-olefin in continuous manner

Examples

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Embodiment

[0029] The following examples serve to illustrate the invention and to compare the products obtained in these examples with those obtained by methods known in the art. Those skilled in the art can make many modifications and changes to the following embodiments according to specific situations, and it should be understood that the present invention can be practiced in other ways than those specifically described herein without departing from the scope of the claims.

[0030] In the following examples, gas chromatography is used to conduct qualitative and quantitative analysis of the product reaction system. The adopted gas chromatograph includes a DB-1HT chromatographic column (30m×0.25mm) and a hydrogen ion flame detector, and the detection injection volume is 0.2 μL, wherein the injection is a mixture of the substance to be tested and dichloromethane in equal volume. The injector temperature was 300°C, the oven temperature was 50°C, and the detector temperature was 350°C. T...

Embodiment A

[0033] Embodiment A: the preparation of catalyst system A

[0034] In this example, catalyst system A for use in the present invention was prepared by the following steps. A motorized stirrer was fitted to a dry 1 liter four necked round bottom glass flask which was placed in a thermostatic heating mantle. Nitrogen was blown into the flask, 200 g of bromide-1-ethyl-3-methylimidazole white solid was placed in the flask, and AlCl was added in batches 3 Pale yellow powder, final bromide-1-ethyl-3-methylimidazole with AlCl 3 The molar ratio was 0.6, the reaction temperature was kept at 50-60°C, and stirred for 2 hours under nitrogen protection to obtain brown bromide-1-ethyl-3-methylimidazole / AlCl 3 solution, as the catalyst system A of the present invention.

Embodiment B

[0035] Example B: Preparation of Catalyst System B

[0036] In this example, Catalyst System B for use in the present invention was prepared by the following steps. A motorized stirrer was fitted to a dry 1 liter four necked round bottom glass flask which was placed in a thermostatic heating mantle. Nitrogen was passed through the flask, and 200ml of dichloromethane was first placed in the flask, and 1 mole of diethylaluminum chloride and 1 mole of TiCl were sequentially added to it. 4 , and finally diethylaluminum chloride with TiCl 4 The molar ratio was 1, the reaction temperature was kept at 30-40° C., and stirred for 1 hour under nitrogen protection conditions to obtain a light yellow solution, which was used as the catalyst system B of the present invention.

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Abstract

A method for preparing poly-alpha-olefin in a continuous manner is disclosed and comprises the following steps: introducing alpha-olefin into a continuous reactor in a continuous manner, under the existence conditions of a lewis acid catalyst and an optional cocatalyst, performing polymerization reaction on alpha-olefin, so as to form poly-alpha-olefin, and leading out the material flow containing poly-alpha-olefin out of the reactor. The alpha-olefin is one or more selected from C6-C14 alpha-olefins.

Description

technical field [0001] This invention relates to the preparation of polyalphaolefins. More specifically, the present invention provides a new process for preparing oligomeric alpha-olefins in a continuous manner with improved conversion and selectivity by improving process operating conditions. Background technique [0002] Polyalphaolefin is also known as PAO synthetic oil, usually through C 6 to C 14 It is prepared by polymerizing one or more linear α-olefins, which is a very important class of lubricants, which has excellent oxidation resistance, high temperature stability and low temperature stability, high viscosity index, low pour point and low Volatile, so it has a wide range of uses. Specifically, PAO synthetic oil can be used to prepare different types of synthetic gasoline engine oil, diesel engine oil, transmission fluid, compressor oil, heat transfer oil and military lubricant, etc., and its main purpose is to prepare high-grade, fuel-saving engine oil. For t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/22C07C11/02C10G69/12C10G50/02
Inventor 刘中文洪显忠刘青才李鹏飞
Owner 上海翔威环境科技集团有限公司
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