Method for preparing poly-alpha-alkene synthetic oil from coal-based raw materials

A technology for synthesizing oil and raw materials from olefins, applied in the production of liquid hydrocarbon mixtures, the petroleum industry, etc., can solve the problems of high prices and low viscosity index, achieve the effect of wide sources and break through the relationship between supply and demand

Active Publication Date: 2014-11-19
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method overcomes the problem of insufficient imported olefin raw materials and high price when producing PAO, and at the same time overcomes the problem of low viscosity index of PAO products produced by wax cracking olefins, making it possible to prepare PAO from coal-to-olefins. The PAO viscosity index I≧145, Viscosity and freezing point are better than PAO prepared from wax cracking olefin raw materials, and comparable to PAO prepared from imported olefins

Method used

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  • Method for preparing poly-alpha-alkene synthetic oil from coal-based raw materials
  • Method for preparing poly-alpha-alkene synthetic oil from coal-based raw materials
  • Method for preparing poly-alpha-alkene synthetic oil from coal-based raw materials

Examples

Experimental program
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Effect test

Embodiment 1

[0031] In a 1L reactor equipped with a stirrer and a thermometer, add 600 g of α-olefins (1# olefins in Table-1) separated by real boiling point distillation, and add AlCl 3 24g of catalyst, start stirring, react at 130°C for 2 hours, cool down to 80°C, let stand for 24 hours, remove catalyst residue. Transfer the deslagging polymer into a reactor equipped with a stirrer, a thermometer, and a condenser, add 120g of calcium hydroxide and 180g of activated clay, raise the temperature to 150°C, keep at this temperature for 1 hour, and refine it with clay , lower the temperature to below 80°C, remove the solid residue by filtration, pass the obtained sample through a small hydrogenation device, in the presence of a nickel-based catalyst, the reaction pressure is 2.0MPa, the reaction temperature is 180°C, the polymer is mixed with hydrogen for hydrogenation refining, and the product is separated Finally, polyalphaolefin synthetic oil is obtained.

Embodiment 2

[0033] The operation steps are the same as Example 1, using 2# olefin in Table-1.

Embodiment 3

[0035] The operation steps are the same as Example 1, using 3# olefin in Table-1.

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Abstract

The invention relates to a method for preparing poly-alpha-alkene synthetic oil from coal-based raw materials. An alpha-alkene coarse product generated in the process of coal indirect liquefaction process is subjected to separation, alpha-alkene components with a boiling range of 40-275 DEG C and with a carbon number o 5-12 are obtained. Under action of catalysts, polymerization reaction is carried out under a pressure of 0.1-0.4 MPa and at a temperature of 80-140 DEG C. Poly-alpha-alkene synthetic oil is obtained after polymer refining and separation. The catalysts are complexes of AlCl3 or AlCl3 and alcohols. The polymer refining is clay refining and hydrofining. The viscosity index of the prepared PAO is comparable to a viscosity index of a PAO product prepared from import alkene, and is more than a viscosity index of a PAO product prepared from wax cracked alkene, and is more than 145. The dependence problems of preparation of alpha-alkene from petroleum resource are solved. In preparation of PAO from coal-made alkene, the raw material cost is low, the source is wide and production requirements can be met.

Description

Technical field: [0001] The invention relates to a carbon number separation of α-olefins produced in the indirect coal liquefaction process to obtain suitable components for the preparation of PAO. High-selectivity cationic catalysts are used to obtain high-performance poly-α-olefin synthetic oil through polymerization reaction, refining and separation. (hereinafter referred to as PAO), the viscosity index of the product is as high as 145. Its performance is not only better than that of PAO prepared by traditional paraffin cracking olefins, but also breaks the situation of relying on imported α-olefins, providing a more effective way for the production of PAO. Background technique: [0002] PAO is a class of relatively regular long-chain alkanes obtained by polymerization of α-olefins under the action of a catalyst. There are two types of methods for industrially producing raw α-olefins: paraffin cracking and ethylene oligomerization. Paraffin cracking method prepares α-ole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G50/00
Inventor 赵崇智孙中华张仁峰王会东杨俊杰李晓东刘中大冯乐刚李磊李红平
Owner PETROCHINA CO LTD
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