CN102776024B - High-viscosity poly alpha-olefin synthetic oil and preparation method thereof - Google Patents
High-viscosity poly alpha-olefin synthetic oil and preparation method thereof Download PDFInfo
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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 pyridinium 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 45 mm<2>/s. The high-viscosity PAO product is provided.
Description
Technical field
The present invention relates to poly alpha olefine synthetic oil (be called for short PAO), definite saying relates to a kind ofly take carbon number as C
6～C
16alpha-olefin be raw material, the acidic ion liquid of take prepares the method for poly alpha olefine synthetic oil as catalyzer, and synthetic a kind of high viscosity poly alpha olefine synthetic oil.
Background technology
PAO is a kind of of synthesized hydrocarbon fluid oils, is mainly by C
6～C
16alpha-olefin polymerization under catalyst action, the more regular long chain alkane obtaining by hydrogenation.PAO stablizes famous with molecule, be better than mineral base oil in lubricant applications.Lower molecular weight distribution makes it have lower volatility, and under hot conditions, reason is not evaporated and caused oil product loss, thereby causes lubricating oil thickening and increase fuel consumption; The isoparaffin structure of higly branched chain is given its fabulous low temperature viscosity and low-down pour point, thereby reduces the impact that engine parts and battery are started under low temperature environment; Have longer backbone structure simultaneously, increased viscosity index, the I. C. engine oil as high viscosity index (HVI), does not need to add more viscosity index improver, has reduced the viscosity degradation causing due to mechanical shearing.In addition its good heat-resistant quality, splendid shear stability, good to the susceptibility of additive, the feature such as nontoxic, makes it compare with mineral oil, shows apparent advantage.
The synthetic of PAO is to make alpha-olefin polymerization reaction take place by catalyst, obtains dimerization, trimerization, four poly-and above mixtures, then by hydrotreatment to improve its oxidation stability.The well-regulated isoparaffin structure of product tool after hydrogenation, is similar to high-quality mineral base oil.
PAO has the very levels of viscosity of wide region, conventionally kinematic viscosity K.V according to 100 ℃ by it
100 ℃divide: K.V
100 ℃lower than 4mm
2/ s is called low viscosity base oil; K.V
100 ℃at 4～20mm
2between/s, be called medium viscosity base oil; K.V
100 ℃at 40～100mm
2between/s, be called high viscosity base oil; K.V
100 ℃be greater than 100mm
2/ s is called hyperviscosity base oil.For the ease of the mediation of oil product, on market, finished product PAO reconciles into K.V as requested
100 ℃be 2,4,6,8,10,20,40,100,1000mm
2other product of/s grade.
As patent US4642410, US5196635, US4827064, US5270273 report, high viscosity poly alpha olefine synthetic oil all adopts Lewis acid catalyst, Z-type catalyst, reduction chrome catalysts to prepare at present.
In US4219691, report is with AlCl
3and C
3the method of PAO is produced in above secondary alcohol or tertiary alcohol complex catalysis olefinic polymerization, and olefin conversion can reach more than 90%, and by changing AlCl
3can obtain the poly alpha olefine synthetic oil of various different viscosity with the ratio of alcohol.
US7547811 has introduced a kind of with AlCl
3with deionized water be that catalyzer is prepared K.V
100 ℃at 40～100mm
2the method of/s high viscosity PAO, wherein 40mm
2/ s rank PAO is synthetic is to carry out under condition of no solvent, and 100mm
2in/s rank PAO building-up process, not only need the solvent that adds 25%～30% olefin(e) centent to improve mass transfer and the heat transfer of polyreaction, also need to add the polyreaction that O.5% dimethylbenzene is promoted alkene.
Although above-mentioned reaction all has very high transformation efficiency, but still exist reaction product and the catalyzer cannot be separated, a large amount of residual catalysts in product, the step such as need to repeatedly wash, and the product molecular weight distribution obtaining be very wide, and product isomerisation degree is high.
It is catalyzer that US2009/0247442 adopts silica-based two (2-tetrahydro indenyl) zirconium dimethyls of dimethyl, and with N, N-dimethyl puratized agricultural spray four (pentafluorophenyl group) borate is auxiliary agent, and the polymerization of catalysis 1-decene obtains K.V
100 ℃at 11～300mm
2/ s, viscosity index is at 150～249 different stage PAO.But reaction finishes rear catalyst and product and still can not get separatedly, and catalyzer is expensive, thereby it is very high to obtain product cost.
The people such as Stenzel (Oleg Stenzel.Oligomerization of olefins in a chloroaluminate ionic liquid.Journal of molecular catalysis 2003, (192): 217～222) by 1-butyl-4-methylimidazole/AlCl
3/ EtAlCl
2(1: 1.1: 0.1) ionic liquid arrives octene short chain olefin polyreaction for ethene.In polymerising ethylene product, contain 33% unreacted monomer, 25% dimer, 36% tripolymer, 6% tetramer; In polymerization 1-butylene product, have 69% for unreacted monomer, 30% dimer and 1% tripolymer; In polymerization 1-hexene product, contain 93% unreacted monomer, 6% dimer and 1% tripolymer; In polymerization 1-octene product, contain 96% unreacted monomer, 3% dimer, 1% tripolymer.Polymeric reaction condition is to react 16h at 60 ℃.
EP0791643 has introduced a kind ofly take ionic liquid and prepares the method for PAO as catalyzer, catalysis alpha-olefine polymerizing, obtains the K.V of product
100 ℃be up to 20mm
2/ s.US6395948 has reported AlCl
3with hydrochloric acid Trimethylamine/1, the ionic liquid-catalyzed 1-decene polymerization of 3 diethyl chloro imidazole salts, obtains K.V
100 ℃only up to 31.6mm
2the PAO of/s.
Summary of the invention
The present invention relates to use ionic liquid-catalyzed alpha-olefine polymerizing to prepare the method for PAO, in particular, relate to use presence of acidic ionic liquid catalyst C
6～C
16alpha-olefine polymerizing prepare the method for high viscosity PAO.
The inventor is through further investigation discovery, and ionic liquid solubleness in olefinic monomer and polyolefine is very low, in polymerization process, cannot realize homogeneous reaction completely.Increase cationic side chain carbon number or increase positively charged ion volume, can improve ionic liquid physico-chemical property, increase ionic liquid to the solvability of olefinic monomer and polyolefin product and dispersiveness, under agitation reach the state close to homogeneous reaction, increase ionic liquid and olefinic monomer and containing the contact between unsaturated double bond polymkeric substance, improved ionic liquid-catalyzed effect.
The preparation method who the invention provides a kind of high viscosity PAO, comprises the steps:
(1) alpha-olefin contacts at-10～100 ℃ with ionic liquid, generates polymerization reactant;
(2) separation of polymeric reactant and ionic liquid;
(3) polymerization reactant, through distillation and hydrofining, obtains poly alpha olefine synthetic oil;
It is characterized in that, it is C that described alpha-olefin is selected from carbon number
6～C
16normal olefine in one or more mixture; Preferably carbon number is C
8～C
12normal olefine in one or more mixture.
Described alpha-olefin can be obtained by vinyl polymerization, also can obtain by wax olefin cracking, coking distillate, catalytic cracking light ends component and Fischer-Tropsch are synthetic.
Described ionic liquid is comprised of two components, and wherein cationic components is selected from one or more mixtures in pyridinium salt, one or more in further preferred N-alkyl substituted pyridines salt.The N-alkyl substituted pyridines salt that forms ionic liquid cationic components is to consist of pyridine ring, substituting group and halogen, structure is suc as formula shown in (2), substituent R on its side chain can be straight chain or the alkyl substituent that contains side chain, also can be that R is preferably C containing the substituting group of cycloalkanes structure, aromatic ring structure
2～C
12alkyl, R is C further preferably
2～C
12alkyl or C
5～C
12cycloalkyl or C
6～C
12aromatic ring substituting group, as ethyl, propyl group, aryl, benzyl etc.Wherein said halogen X
-can be F
-, Cl
-, Br
-, I
-in a kind of, further preferably Cl
-.
N-alkyl pyridine positively charged ion
Described anionic group is mainly selected from the Lewis acid of halo metallic salt, as one or more the mixture in aluminum chloride, aluminum alkyls, chloro aluminum alkyls, aluminum bromide, tin chloride, iron trichloride, cupric chloride, cuprous chloride, titanium tetrachloride, antimony chloride, zinc chloride, gallium chloride; The mixture of one or more in preferred aluminum chloride, aluminum alkyls, chloro aluminum alkyls, aluminum bromide, further preferred aluminum chloride.Conventionally the mol ratio of anionic group and cationic components is 1: 1 to 3: 1, preferably 1.2: 1 to 3: 1, and further preferably 1.5: 1 to 2.5: 1.For example formula (3)～(4) are the alkyl substituted pyridines chlorine aluminic acid ionic liquids of different substituents, and wherein the mol ratio of yin, yang ion is 2: 1.
The preparation method of PAO provided by the invention is: described alpha-olefin is added drop-wise in the reactor that described ionic liquid is housed, it is contacted with ionic liquid, until generate poly-alpha olefins; Standing, from product, isolate ionic liquid, polymerisate, through washing or absorption, then obtains product P AO after underpressure distillation and hydrofining.
More specifically, in the method for the invention, alpha-olefin and ionic liquid Contact Temperature are-10～100 ℃, preferably-5～80 ℃, and further preferably 0～50 ℃.The control of temperature can adopt any conventional method, as adopted, drips alpha-olefin to being equipped with in the reactor of ionic liquid, increases and stirs; Also can take away polyreaction liberated heat by cryostat mode; Also can combine in several ways use.Be added dropwise to complete rear reaction and continue to keep certain hour to make to react completely, the reaction times is generally selected 15～360min, preferred 30～240min, further preferred 45～180min.
The weight ratio of alpha-olefin and ionic liquid is 1～200: 1, preferably 5～100: 1, further preferably 10～50: 1.
Method provided by the present invention, for the separation of reaction product, can adopt stratification separation and distillation method, and used is all ordinary method, there is no special requirement.For example: still-process can adopt the conventional device and atmospheric and vacuum distillation in this area, as long as can realize the separation between unconverted monomer, dimer and tripolymer and above polymkeric substance.
Adopt method provided by the invention, the transformation efficiency of monomer is greater than 90%, and in reaction product, oligomerization product content is few, and the product polymerization degree is mainly distributed between 6～40.
In order to obtain, not containing the PAO of unsaturated link(age), also comprising hydrorefined step, described hydrofining does not have special requirement, as long as can reach the object of hydrogenation of net product, conventional hydrogenation catalyst, equipment, processing condition are all applicable, do not repeat them here.
In PAO preparation method of the present invention, described ionic liquid is catalyzer, is also solvent.Described ionic liquid not only has higher catalytic activity, and easily by after stratification with product separation, isolated ionic liquid-catalyzed activity remains unchanged substantially, can reuse, and has further reduced production cost.
The present invention also provides a kind of high viscosity PAO that has adopted above-mentioned preparation method to obtain, and it is characterized in that the kinematic viscosity K.V of 100 ℃
100 ℃be greater than 45mm
2/ s; In addition, this product also has following features: lower pour point, is generally less than-35 ℃; Higher viscosity index VI value, is generally greater than 145; Narrower molecular weight distribution, molecular weight distribution D is generally less than 1.5; Less cladodification degree, cladodification degree is generally less than 0.17.
Said molecular weight distribution D refers to the relative quantity that forms differing molecular weight polymers in polymkeric substance, D=M
w/ M
n, M wherein
wrepresent matter average molecular weight, M
nrepresent number-average molecular weight, it is measured by gel chromatography (GPC) conventionally, and less molecular weight distribution means that the product polymerization degree is more concentrated.
Said less cladodification degree refers to that product is to be repeated to connect and compose by monomer, and product side chain distribution is even and length is identical, in product, contains the less short-side chain being caused by reasons such as isomery, rearrangements.The size of product cladodification degree can be measured by nuclear magnetic resonance spectrum, also can adopt infrared spectrometry to obtain.By
1during H-NMR nucleus magnetic resonance spectrometry, wherein the peak of 0～1.06ppm is CH
3chemical shift, its integral area is denoted as P1; At the peak of 1.06～2.0ppm, be CH
2, CH chemical shift, its integral area is denoted as P2, then by following formula, is calculated the cladodification degree of polymerisate.
In the preparation method of PAO provided by the invention, ionic liquid has higher catalytic activity and can recycle, not only can reduce production costs, and reduce the pollution to environment; It is high that the PAO product of producing has viscosity, K.V
100 ℃be greater than 45mm
2/ s, and there is lower cladodification degree and lower molecular weight distribution, can be the high viscosity PAO product that market provides a kind of excellence.
Accompanying drawing explanation
Fig. 1 is polymerisate in embodiment 3
1h-NMR spectrogram, the peak that is wherein positioned at 0～1.06ppm place is CH
3chemical shift, the peak that is positioned at 1.06～2.0ppm place is CH
2, CH chemical shift.
Embodiment
Further set forth by the following examples the present invention.
AlCl
3, 1-hexene, 1-decene, 1-laurylene be commercial reagent, analytical pure; Other ionic liquid intermediate is synthesized by laboratory, and the method for being understood by persons skilled in the art can synthesize.
Embodiment 1～2nd, about the preparation of ionic liquid
Embodiment 1
The preparation of chlorine aluminic acid N-ethylpyridine salt ion liquid:
The chloro N-ethylpyridine that 40g is dry joins in 500ml round-bottomed flask, under nitrogen atmosphere, keep temperature not higher than 80 ℃, 92.9g aluminum chloride is joined in round-bottomed flask to zwitterion mol ratio 2.5: 1 in batches, magnetic agitation keeps 12h, under drying conditions, saves backup.Ionic liquid molecules structure, suc as formula shown in (4), is called chlorine aluminic acid N-ethylpyridine ionic liquid.
Embodiment 2
The preparation of chlorine aluminic acid N-benzyl-pyridine acidic ion liquid:
The chloro N-benzyl-pyridine that 40.0g is dry joins in 500ml round-bottomed flask, under nitrogen atmosphere, keep temperature not higher than 80 ℃, 31.2g aluminum chloride is joined in round-bottomed flask to zwitterion mol ratio 1.2: 1 in batches, magnetic agitation keeps 12h, under drying conditions, saves backup.Ionic liquid molecules structure, suc as formula shown in (5), is called chlorine aluminic acid N-benzyl-pyridine acidic ion liquid.
The preparation of embodiment 3～7 explanation poly alpha olefine synthetic oils, the PAO analytical results obtaining is in Table 1.
Embodiment 3
Take embodiment 1 intermediate ion liquid 0.2g and join tri-mouthfuls of round-bottomed flasks of 250ml, round-bottomed flask is put into low-temp reaction and bathe, maintain the temperature at 0 ℃, nitrogen passes into maintenance inert atmosphere, mechanical stirring.Take 40gl-decene is added in feed-pipe, make alpha-olefin and ionic liquid weight ratio=200: 1, keep constant drop rate to enter into flask, after reaction 180min, by there-necked flask stratification, isolate upper strata polymkeric substance, add the 1%NaOH aqueous solution, deactivation remains in the ionic liquid in polymkeric substance, polymerisate is through washing, after dry, with gpc analysis, it forms, and then underpressure distillation removes unreacted monomer and dimer, then after hydrogenation, obtains water white poly alpha olefine synthetic oil.
Embodiment 4
Take embodiment 1 intermediate ion liquid 4g and join tri-mouthfuls of round-bottomed flasks of 250ml, round-bottomed flask is put into low-temp reaction and bathe, maintain the temperature at 20 ℃, nitrogen passes into maintenance inert atmosphere, mechanical stirring.Take 40gl-decene is added in feed-pipe, make alpha-olefin and ionic liquid weight ratio=10: 1, keep constant drop rate to enter into flask, after reaction 120min, by there-necked flask stratification, isolate upper strata polymkeric substance, add the 1%NaOH aqueous solution, deactivation remains in the ionic liquid in polymkeric substance, polymerisate is through washing, after dry, with gpc analysis, it forms, and then underpressure distillation removes unreacted monomer and dimer, obtains water white poly alpha olefine synthetic oil after hydrogenation.
Embodiment 5
Take embodiment 1 intermediate ion liquid 40g and join tri-mouthfuls of round-bottomed flasks of 250ml, round-bottomed flask is put into low-temp reaction and bathe, maintain the temperature at 100 ℃, nitrogen passes into maintenance inert atmosphere, mechanical stirring.Take 40gl-decene is added in feed-pipe, make alpha-olefin and ionic liquid weight ratio=1: 1, keep constant drop rate to enter into flask, after reaction 15min, by there-necked flask stratification, isolate upper strata polymkeric substance, add the 1%NaOH aqueous solution, deactivation remains in the ionic liquid in polymkeric substance, polymerisate is through washing, after dry, with gpc analysis, it forms, and then underpressure distillation removes unreacted monomer and dimer, obtains water white poly alpha olefine synthetic oil after hydrogenation.
Embodiment 6
Take embodiment 2 intermediate ion liquid 6g, join tri-mouthfuls of round-bottomed flasks of 250ml, round-bottomed flask is put into low-temp reaction and bathe, maintain the temperature at-10 ℃, nitrogen passes into maintenance inert atmosphere, mechanical stirring.Take the mixture of 13.3gl-hexene and 26.7gl-laurylene is added in feed-pipe, alpha-olefin and ionic liquid weight ratio=6.7: 1, keep constant drop rate to enter into flask, after reaction 360min, by there-necked flask stratification, isolate upper strata polymkeric substance, add the 1%NaOH aqueous solution, deactivation remains in the ionic liquid in polymkeric substance, polymerisate is through washing, after dry, with gpc analysis, it forms, and then underpressure distillation removes unreacted monomer and dimer, then after hydrogenation, obtains water white poly alpha olefine synthetic oil.
Embodiment 7
Take embodiment 2 intermediate ion liquid 0.4g, join tri-mouthfuls of round-bottomed flasks of 250ml, round-bottomed flask is put into low-temp reaction and bathe, maintain the temperature at 50 ℃, nitrogen passes into maintenance inert atmosphere, mechanical stirring.Take the mixture of 26.7gl-hexene and 13.3gl-hexadecylene is added in feed-pipe, make alpha-olefin and ionic liquid weight ratio=100: 1, keep constant drop rate to enter into flask, after reaction 60min, by there-necked flask stratification, isolate upper strata polymkeric substance, add the 1%NaOH aqueous solution, deactivation remains in the ionic liquid in polymkeric substance, polymerisate is through washing, after dry, with gpc analysis, it forms, and then underpressure distillation removes unreacted monomer and dimer, then after hydrogenation, obtains water white poly alpha olefine synthetic oil.
The sign of embodiment 8PAO
Choose polymerisate in embodiment 3 and carry out nuclear-magnetism sign, see accompanying drawing 1.According to
1h-NMR spectrogram learns, chemical shift is CH at 0～1.06ppm place
3peak, chemical shift is CH at 1.06～2.0ppm place
2, CH peak.The cladodification degree that calculates product by following formula after area integral is 0.147, and this shows in reaction process, to only have only a few molecule under this condition a small amount of rearrangement isomerization reaction has occurred.
Comparative example 1
Take embodiment 1 intermediate ion liquid 2g and join tri-mouthfuls of round-bottomed flasks of 250ml, round-bottomed flask is put into low-temp reaction and bathe, maintain the temperature at 120 ℃, nitrogen passes into maintenance inert atmosphere, mechanical stirring.Taking 40gl-decene adds in feed-pipe, make alpha-olefin and ionic liquid weight ratio=20: 1, keep constant drop rate to enter into flask, after reaction 180min, by there-necked flask stratification, isolate upper strata polymkeric substance, add the 1%NaOH aqueous solution, deactivation remains in the ionic liquid in polymkeric substance, and product is through washing, after distillation, through hydrogenation, obtaining 100 ℃ of viscosity of product is 21.5mm
2/ s, 40 ℃ of viscosity are 195mm
2/ s, viscosity index is 131, pour point is-53 ℃.The explanation of this example, at higher temperature, can not get 100 ℃ of kinematic viscosity and surpasses 45mm
2the product of/s.
Comparative example 2
According to the method in embodiment 1, prepare N-picoline chlorine aluminic acid ionic liquid (zwitterion mol ratio 2: 1).Take ionic liquid 10g (alpha-olefin and ionic liquid weight ratio=4: 1) join tri-mouthfuls of round-bottomed flasks of 250ml, round-bottomed flask is put into low-temp reaction and bathe, maintain the temperature at 20 ℃, nitrogen passes into maintenance inert atmosphere, mechanical stirring.Take 40gl-decene is added in feed-pipe, keep constant drop rate to enter into flask, after reaction 180min, by there-necked flask stratification, isolate upper strata polymkeric substance, add the 1%NaOH aqueous solution, deactivation remains in the ionic liquid in polymkeric substance, product is through washing, and after distillation, through hydrogenation, obtaining 100 ℃ of viscosity of product is 41.0mm
2/ s.The explanation of this example adopts non-ionic liquid of the present invention, and polymerization obtains product and has lower viscosity.
Table 1
Claims (20)
1. a K.V
100 ℃be greater than 45mm
2the preparation method of the poly alpha olefine synthetic oil of/s (PAO), comprises the steps:
(1) alpha-olefin contacts at-10～100 ℃ with ionic liquid, generates polymerization reactant;
(2) separation of polymeric reactant and ionic liquid;
(3) polymerization reactant, through distillation and hydrofining, obtains poly alpha olefine synthetic oil;
Wherein, ionic liquid is comprised of anionic group and cationic components, and anionic group is selected from one or more the mixture in aluminum chloride, aluminum alkyls, haloalkyl aluminium, aluminum bromide, and cationic components is selected from one or more the mixture in pyridinium salt; The mol ratio of anionic group and cationic components is 1～3: 1, and the contact of step (1) is in nitrogen inert atmosphere, alpha-olefin to be added drop-wise in described ionic liquid under agitation condition.
2. in accordance with the method for claim 1, it is characterized in that it is C that described alpha-olefin is selected from carbon number
6～C
16normal olefine in one or more mixture.
3. in accordance with the method for claim 2, it is characterized in that it is C that described alpha-olefin is selected from carbon number
8～C
12normal olefine in one or more mixture.
4. in accordance with the method for claim 1, it is characterized in that in described ionic liquid, anionic group is selected from aluminum chloride.
5. in accordance with the method for claim 1, it is characterized in that in described ionic liquid, cationic components is selected from the N-alkyl substituted pyridines salt shown in structural formula (1), the substituent R on its side chain is C
2～C
12alkyl; X
-for halogen F
-, Cl
-, Br
-, I
-in a kind of.
6. in accordance with the method for claim 5, in the ionic liquid described in it is characterized in that, in cationic components N-alkyl substituted pyridines salt, the substituent R on its side chain is C
2～C
12alkyl group or C
5～C
12cycloalkyl or C
6～C
12aromatic ring substituting group.
7. in accordance with the method for claim 5, it is characterized in that in described ionic liquid in cationic components N-alkyl substituted pyridines salt X
-for Cl
-.
8. in accordance with the method for claim 1, in described ionic liquid, the mol ratio of anionic group and cationic components is 1.2～3: 1.
9. in accordance with the method for claim 8, in described ionic liquid, the mol ratio of anionic group and cationic components is 1.5～2.5: 1.
10. in accordance with the method for claim 1, described ionic liquid is to make in anionic group being joined to cationic components under the atmosphere of dry inert gas.
11. in accordance with the method for claim 1, and alpha-olefin contacts at-5～80 ℃ with ionic liquid.
12. in accordance with the method for claim 11, and alpha-olefin contacts 15～360min with ionic liquid.
13. in accordance with the method for claim 12, and alpha-olefin contacts 30～240min with ionic liquid.
14. in accordance with the method for claim 1, and the weight ratio of alpha-olefin and ionic liquid is 1～200: 1.
15. in accordance with the method for claim 14, and the weight ratio of alpha-olefin and ionic liquid is 5～100: 1.
16. in accordance with the method for claim 15, and the weight ratio of alpha-olefin and ionic liquid is 10～50: 1.
17. 1 kinds of poly alpha olefine synthetic oils that make according to the method described in claim 1～16, is characterized in that, the kinematic viscosity K.V of 100 ℃
100 ℃be greater than 45mm
2/ s.
18. according to the poly alpha olefine synthetic oil described in claim 17, it is characterized in that, pour point is less than-35 ℃.
19. according to the poly alpha olefine synthetic oil described in claim 17, it is characterized in that, viscosity index VI value is greater than 145.
20. according to the poly alpha olefine synthetic oil described in claim 17, it is characterized in that, molecular weight distribution D is less than 1.5, and cladodification degree is less than 0.17.
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| CN1163922A (en) * | 1996-02-22 | 1997-11-05 | 英国石油化学品有限公司 | Lubricating oils |
| US6395948B1 (en) * | 2000-05-31 | 2002-05-28 | Chevron Chemical Company Llc | High viscosity polyalphaolefins prepared with ionic liquid catalyst |
| WO2007078594A2 (en) * | 2005-12-20 | 2007-07-12 | Chevron U.S.A. Inc. | Process for making and composition of superior lubricant or lubricant blendstock |
| CN101208144A (en) * | 2005-06-06 | 2008-06-25 | 英国石油有限公司 | Method for separating emulsions |
| CN101360700A (en) * | 2005-12-20 | 2009-02-04 | 雪佛龙美国公司 | Alkylation of oligomers to make superior lubricant or fuel blendstock |
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2011
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1163922A (en) * | 1996-02-22 | 1997-11-05 | 英国石油化学品有限公司 | Lubricating oils |
| US6395948B1 (en) * | 2000-05-31 | 2002-05-28 | Chevron Chemical Company Llc | High viscosity polyalphaolefins prepared with ionic liquid catalyst |
| CN101208144A (en) * | 2005-06-06 | 2008-06-25 | 英国石油有限公司 | Method for separating emulsions |
| WO2007078594A2 (en) * | 2005-12-20 | 2007-07-12 | Chevron U.S.A. Inc. | Process for making and composition of superior lubricant or lubricant blendstock |
| CN101360700A (en) * | 2005-12-20 | 2009-02-04 | 雪佛龙美国公司 | Alkylation of oligomers to make superior lubricant or fuel blendstock |
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