High-viscosity poly alpha-olefin synthetic oil and preparation method thereof

A technology for olefin synthesis oil and olefin, which is applied in the production of liquid hydrocarbon mixture, petroleum industry, etc., can solve the problems that catalyst and product cannot be separated, catalyst is expensive, and product cost is high, and can reduce production cost, low molecular weight distribution, The effect of reducing pollution

Active Publication Date: 2012-11-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after the reaction, the catalyst and the product still cannot be separ...

Method used

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  • High-viscosity poly alpha-olefin synthetic oil and preparation method thereof
  • High-viscosity poly alpha-olefin synthetic oil and preparation method thereof
  • High-viscosity poly alpha-olefin synthetic oil and preparation method thereof

Examples

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Effect test

Embodiment 1

[0044] Preparation of chloroaluminic acid 1-methyl-3-butylimidazole acidic ionic liquid:

[0045] Add 40.0g of dry chlorinated 1-methyl-3-butylimidazolium salt into a 500ml round-bottomed flask, keep the temperature not higher than 80°C under nitrogen atmosphere, add 76.3g of aluminum trichloride to the round-bottomed flask in batches In the flask, the molar ratio of anions and cations is 2.5:1, kept under magnetic stirring for 12 hours, and stored under dry conditions for later use. The molecular structure of the ionic liquid is shown in formula (4), and it is called chloroaluminate chlorinated 1-methyl-3-butylimidazolium ionic liquid.

[0046] Formula (4)

Embodiment 2

[0048] Preparation of 1-methyl-3-benzylimidazole acidic ionic liquid of chloroaluminate:

[0049] Add 40.0g of dry 1-methyl-3-benzyl imidazole chloride to a 500ml round bottom flask, keep the temperature not higher than 80°C under nitrogen atmosphere, add 30.7g of aluminum trichloride to the round bottom flask in batches In this method, the molar ratio of anion and cation was 1.2:1, kept under magnetic stirring for 12 hours, and stored under dry conditions for later use. The molecular structure of the ionic liquid is shown in formula (5), and it is called chloroaluminate 1-methyl-3-benzyl imidazolium ionic liquid.

[0050] Formula (5)

Embodiment 3

[0053] Weigh 0.2 g of the ionic liquid in Example 1 and add it to a 250 ml three-necked round-bottomed flask, put the round-bottomed flask into a low-temperature reaction bath, keep the temperature at 0° C., pass nitrogen gas to maintain an inert atmosphere, and stir mechanically. Weigh 40g of 1-decene and add it into the feeding tube so that the weight ratio of α-olefin to ionic liquid is 200:1, and keep a constant dropping rate into the flask. After reacting for 180min, the three-neck flask is allowed to stand for stratification and separated. Take out the upper layer polymer, add 1% NaOH aqueous solution to inactivate the ionic liquid remaining in the polymer, wash the polymer product with water, analyze its composition with GPC after drying, and then remove the unreacted monomer and dimer by distillation under reduced pressure , and then hydrogenated to obtain a colorless and transparent poly-alpha-olefin synthetic oil.

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Abstract

The invention provides a poly alpha-olefin synthetic oil (PAO) and a preparation method thereof. The preparation method comprises the following steps of contacting alpha-olefins with an ionic liquid at a temperature of -10-100 DEG C to form a polymerization reactant; separating the polymerization reactant from the ionic liquid; and distilling and hydrorefining the polymerization reactant, thus obtaining the poly alpha-olefin synthetic oil. The ionic liquid is composed of anionic components and cationic components, wherein the anionic components are one or more selected from aluminum trichloride, alkyl aluminium, halogenated alkyl aluminium and aluminium bromide; the cationic components are one or more selected from imidazolium salts; the molar ratio of the anionic components and cationic components is 1-3 : 1; the mass ratio of alpha-olefins and the ionic liquid is 1-200 : 1; and reaction time is 15-360 min. Kinematic viscosity at 100 DEG C (K.V[100 DEG C]) of the obtained PAO is larger than 40 mm<2>/s. The high-viscosity PAO product is provided.

Description

technical field [0001] The present invention relates to polyalpha-olefin synthetic oil (abbreviation PAO), exactly relates to a kind of with carbon number as C 6 ~C 16 A method for preparing polyalpha-olefin synthetic oil with α-olefin as raw material and ionic liquid as a catalyst, and a synthetic high-viscosity polyalpha-olefin synthetic oil. Background technique [0002] Poly-α-olefin synthetic oil (PAO for short) is a kind of synthetic hydrocarbon lubricating oil, mainly composed of C 6 ~C 16 The α-olefins are polymerized under the action of a catalyst, and then hydrogenated to obtain regular long-chain alkanes. Known for their molecular stability, PAOs are superior to mineral base oils in lubricant applications. The lower molecular weight distribution makes it have lower volatility, and it will not cause oil loss due to evaporation under high temperature conditions, resulting in thickening of lubricating oil and increased fuel consumption; the multi-branched isopara...

Claims

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Application Information

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IPC IPC(8): C10G50/02
Inventor 张耀段庆华刘依农李玲
Owner CHINA PETROLEUM & CHEM CORP
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