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Apparatus and method for producing poly-alpha-olefin by continuous process

A continuous method and olefin technology, applied in chemical instruments and methods, base materials, hydrocarbons, etc., can solve problems affecting product composition, difficulty in mixing and removing heat, etc.

Inactive Publication Date: 2019-12-31
SINOPEC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Continuously operating commercial PAO devices are generally larger in scale, and the larger the reactor volume, the larger the device, and the larger the volume of the stirred tank reactor, it is difficult to mix and remove heat, and the reaction residence time distribution is relatively slow. Width can affect product composition

Method used

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  • Apparatus and method for producing poly-alpha-olefin by continuous process
  • Apparatus and method for producing poly-alpha-olefin by continuous process

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Embodiment approach

[0041] As a preferred embodiment, the device further includes a liquid level controller and / or a temperature controller for monitoring the liquid level and / or temperature in the catalyst preparer and the multistage reactor respectively.

[0042] Another aspect of the present invention provides a kind of method utilizing above-mentioned device to produce polyalphaolefin, this method comprises:

[0043] Catalyst and accelerator are mixed in the catalyst preparer to obtain catalyst complex, which enters the first-stage reactor through the catalyst metering pump, and carries out the first-stage polymerization reaction with α-olefin dissolved and mixed with the catalyst , the obtained first-stage polymerization product enters the follow-up reactor through the discharge pump, and finally obtains polyalphaolefin;

[0044] Among them, the heat generated in the catalyst preparer and reactors of all stages is withdrawn through the chilled water unit.

[0045] According to the present i...

Embodiment 1

[0058] Such as figure 1 As shown, the present embodiment provides a device for continuous production of polyalpha-olefins, the production device includes: a batch catalyst preparer (only one is shown in the figure), and the catalyst preparer 2 includes a tank body and a first stirring Mechanism 1, the first stirring mechanism 1 includes a stirring shaft extending vertically downward from the top of the tank to the bottom of the tank, a stirring paddle arranged on the stirring shaft and driving the stirring shaft and stirring The power unit that the paddle rotates; the tank body is also provided with a catalyst feed port, a promotor feed port, a material outlet, a temperature measurement port and a liquid level measurement port; a cooling jacket and a cooling cavity is formed between the tank body;

[0059] Two reactors connected in series, a discharge pump 6 is arranged between the two reactors; wherein, the first stage of the two reactors is a stirred tank reactor, and the s...

Embodiment 2

[0066] Such as figure 2 As shown, the difference between this embodiment and embodiment 1 is that the second-stage reactor 7 is a stirred tank reactor, and other devices and production methods are the same as in embodiment 1.

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Abstract

The invention discloses an apparatus and a method for producing poly-alpha-olefin through a continuous process. The apparatus comprises a catalyst preparation device, and a first cooling jacket is arranged in the periphery of a tank body; a multistage reactor comprises a plurality of reactors which are connected in series, the first-stage reactor is a stirred tank reactor, and the remaining reactors are stirred tank reactors or tubular reactors; a second cooling jacket is arranged in the periphery of the kettle body of the first-stage reactor, and a built-in coil pipe is arranged in the first-stage reactor; a cooling jacket is arranged in the periphery of the wall of each of the remaining reactors; a catalyst metering pump is communicated with the catalyst preparation device and the first-stage reactor; and a chilled water unit comprises a chilling unit, and a chilled water supply pipe and a water return pipe which are communicated with the chilling unit, and the chilled water supply pipe and the water return pipe are communicated with all the cooling jackets and the built-in coils to form multiple outside circulations. The apparatus and the method for producing poly-alpha-olefin by the continuous process fill the gap in commercialized production of poly-alpha-olefin (PAO) in China, and can realize large-scale production of PAO synthetic oil head products.

Description

technical field [0001] The invention belongs to the field of alpha-olefin oligomerization, and more specifically relates to a device and method for continuously producing polyalpha-olefin. Background technique [0002] PAO (Poly-Alpha-Olefin, poly-α-olefin) base oil is obtained by oligomerization of linear α-olefins (usually 1-decene, or 1-hexene to 1-tetradecene mixed α-olefins) The products (dimers, trimers, tetramers, etc.) are the most important base oils for Class IV synthetic lubricating oils. Class IV synthetic lubricating oils have high viscosity index, low pour point, high flash point, thermal and oxidative stability Good performance, high and low temperature performance and long service life, especially suitable for aerospace, military, transportation and cosmetics industries. PAO synthetic oil can be divided into low viscosity, medium-high viscosity and ultra-high viscosity. Among them, low-viscosity PAO accounts for about 70-80% of the PAO market. Low-viscosity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/20C07C11/107C07C11/02C10M107/10C10N30/02C10N30/06
CPCC07C2/20C07C2531/22C10M107/10C10M2205/0285C10N2030/02C10N2030/06C07C11/107C07C11/02
Inventor 刘健聂毅强李方尧
Owner SINOPEC ENG
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