CN105562086B - A kind of ethylene oligomerization carbon monoxide-olefin polymeric and application - Google Patents
A kind of ethylene oligomerization carbon monoxide-olefin polymeric and application Download PDFInfo
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Abstract
The invention discloses a kind of carbon monoxide-olefin polymeric for ethylene oligomerization reaction process, including the acetophenone amido quinoline of major catalyst chlorination 2 (benzimidazolyls of 1H 2) 8 shown in formula (I) closes chromium (III) complex, containing aluminum cocatalyst, water and organic solvent.
Description
Technical field
The present invention relates to ethylene oligomerization field, and in particular to a kind of catalyst combination for ethylene oligomerization reaction process
Thing.
Background technology
Linear alpha-alkene ethylene comonomer, synthesis of surfactant intermediate, plasticizer alcohol, synthetic lubricant fluid and
The fields such as oil dope have a wide range of applications.In recent years, with the continuous development of polyolefin industry, in world wide to α-
The demand rapid development of alkene.The alpha-olefin of the overwhelming majority is prepared to obtain by ethylene oligomerization at present.Ethylene oligomerization method institute
Catalyst mainly has nickel system, chromium system, zirconium system and aluminium system etc., in recent years, Brookhart groups (Brookhart, M et al.,
J.Am.Chem.Soc.,1998,120,7143-7144；WO99/02472,1999), Gibson groups (Gibson, V.C. etc.
People, Chem.Commun., 1998,849-850；Chem.Eur.J., 2000,2221-2231) find respectively some Fe (II) and
Co (II) trident pyridinimine complex can be catalyzed ethylene oligomerization, and not only the catalytic activity of catalyst is very high, and alpha-olefin
Selectivity it is also very high.
Institute of Chemistry, Academia Sinica reports a kind of for ethylene oligomerization and the catalyst of polymerization
(Organometallics2011,30,3001-3009), the catalyst are chlorination 2- (1H-2- benzimidazolyls)-8- acetophenones
Amido quinoline closes chromium (III), under the effect of co-catalyst MAO, when in the metallic aluminium and major catalyst in co-catalyst
Central metal mol ratio be 200~2500, and reaction temperature be 30~60 DEG C when, oligomerisation and polymerization activity are up to
106g·mol(Cr)-1·h-1；Regardless of whether be MAO, or modified methylaluminoxane all exists as co-catalyst
The problem of cost is too high, and dosage is excessive, as co-catalyst large-scale application when the ethylene oligomerization, it certainly will cause production cost
It is high.
Today, it is generally accepted that water is very unfavorable to ethylene oligomerization reaction process, CN200810111717.8 is disclosed
A kind of method of ethylene oligomerization, it is strict controlled in the environment of anhydrous and oxygen-free and carries out, therefore the reaction of current ethylene oligomerization is to work
Skill requires very harsh, causes the reaction initiation of oligomerisation reaction technique and repeatability all excessively poor.
The content of the invention
For deficiency of the prior art, inventor has carried out grinding extensively and profoundly in ethylene oligomerization with catalyst field
Study carefully, it has surprisingly been found that ethene is including major catalyst chlorination 2- (1H-2- benzimidazolyls) -8- antifebrins shown in formula (I)
Base quinoline closes chromium (III), the lower progress oligomerisation reaction of carbon monoxide-olefin polymeric effect containing aluminum cocatalyst, water and organic solvent, instead
And with higher oligomerisation reaction activity, and oligomerisation reaction initiation is rapid, operates steadily, be reproducible；So as to overcome ability
The technology prejudice of field technique personnel, achieves unexpected technique effect.
According to an aspect of the invention, there is provided a kind of ethylene oligomerization carbon monoxide-olefin polymeric, the catalyst combination
Major catalyst chlorination 2- (1H-2- the benzimidazolyls) -8- acetophenone amidos quinoline that thing is included shown in formula (I) closes chromium (III), contained
Aluminum cocatalyst, water and organic solvent：
In formula (I), R1-R5It is each independently selected from hydrogen, C1-C6Alkyl, halogen, C1-C6Alkoxy and nitro.
According to carbon monoxide-olefin polymeric provided by the invention, there is higher ethylene oligomerization reactivity, the selection of alpha-olefin
Property it is high.
In carbon monoxide-olefin polymeric of the present invention, using the weight of organic solvent as calculating benchmark, the weight content of water
(i.e. the organic solvent based on 1g, 5~350 × 10 are contained in composition for 5~350ppm-6G water), preferably 20~260ppm, most
Preferably 50~200ppm.In the range of described water content, the carbon monoxide-olefin polymeric has higher ethylene oligomerization activity.
In the carbon monoxide-olefin polymeric of the present invention, the dosage of the major catalyst and co-catalyst can according to production scale and
The process conditions during concrete applications such as production equipment are selected.In a specific embodiment of the carbon monoxide-olefin polymeric,
Using the volume of organic solvent as calculating benchmark, the content of the major catalyst is (organic molten i.e. based on 1L for 2~500 μm of ol/L
Agent, 2~500 × 10 are contained in composition-6Mol major catalyst), preferably 20~100 μm of ol/L.
In the present invention, wherein the mol ratio of aluminium in the co-catalyst and the chromium in the major catalyst for 30 to small
In 900, preferably 100~700.In a specific embodiment of the above method, the mol ratio of the aluminium and chromium is 148~196.
In the relatively low molar ratio range of offer, the ethylene oligomerization activity in methods described is still higher.
In the present invention, the R in the major catalyst1-R5It is each independently selected from hydrogen, methyl, ethyl, n-propyl, isopropyl
Base, fluorine, chlorine, bromine, methoxyl group, ethyoxyl and nitro.In a specific embodiment of the above method, in the major catalyst
R1And R5For ethyl, R2-R4It is hydrogen.
In the present invention, the organic solvent be selected from toluene, hexamethylene, ether, tetrahydrofuran, ethanol, benzene, dimethylbenzene and
Dichloromethane, it is preferably selected from toluene and dimethylbenzene.
In the present invention, term " C1-C6Alkyl " refers to saturated straight chain or branched hydrocarbyl containing 1-6 carbon atom.Make
For C1-C6Alkyl, it can be mentioned that methyl, ethyl, n-propyl, isopropyl, normal-butyl, isobutyl group, sec-butyl, the tert-butyl group, positive penta
Base, isopentyl, sec-amyl, n-hexyl and Sec-Hexyl；Particularly preferred methyl, ethyl, n-propyl and isopropyl.
In the present invention, term " C1-C6Alkoxy " refers to above-mentioned C1-C6Alkyl is connected what is obtained with an oxygen atom
Group.As C1-C6Alkoxy, it can be mentioned that methoxyl group, ethyoxyl, positive propoxy, isopropoxy, n-butoxy, isobutyl oxygen
Base, sec-butoxy, tert-butoxy, n-pentyloxy, secondary amoxy, positive hexyloxy and secondary hexyloxy；Particularly preferred methoxyl group and second
Epoxide.
In the present invention, term " halogen " refers to fluorine, chlorine, bromine and iodine, particularly preferred fluorine, chlorine and bromine.
In the present invention, it is described to be selected from aikyiaiurnirsoxan beta and alkyl aluminum compound, preferably alkyl aluminum compound containing aluminum cocatalyst.
In the present invention, the formula of the alkyl aluminum compound is AlRnXm, wherein R is each independently straight or branched
C1-C8Alkyl；X is respectively halogen, preferably chlorine or bromine；N is 1~3 integer, and m is 0~2 integer, and m+n is equal to 3；It is preferred that
Ground, described alkyl aluminum compound are excellent from trimethyl aluminium, triethyl aluminum, tri-propyl aluminum, triisobutyl aluminium, tri-n-hexyl aluminum, three
Octyl aluminum, diethylaluminum chloride and ethylaluminium dichloride, more preferably triethyl aluminum.
In the present invention, the aikyiaiurnirsoxan beta is C1-C4Alkylaluminoxane, wherein C1-C4Alkyl is the alkane of straight or branched
Base；Preferably, described aikyiaiurnirsoxan beta is selected from MAO, modified methylaluminoxane, ethylaluminoxane and isobutyl aluminium alkoxide；
More preferably MAO.
Major catalyst chlorination 2- (1H-2- benzimidazolyls) -8- acetophenone amidos quinoline shown in the logical formula (I) of the present invention closes
Chromium (III) can use the preparation method of document (Organometallics 2011,30,3001-3009) report to be made.
According to another aspect of the present invention, there is provided a kind of ethylene oligomerization method, the ethene is in the catalyst
Oligomerisation reaction is being carried out in the presence of composition.The carbon monoxide-olefin polymeric includes the major catalyst chlorination 2- shown in formula (I)
(1H-2- benzimidazolyls) -8- acetophenone amidos quinoline closes chromium (III), containing aluminum cocatalyst, water and organic solvent.
Wherein, a specific embodiment may include following steps：(1) dried by high temperature, the operation pair such as vacuum displacement
Reaction system enters line replacement, it is ensured that anhydrous and oxygen-free in reaction system；(2) line replacement is entered to reaction system using ethene, makes reaction
System is in ethene environment；(3) add carbon monoxide-olefin polymeric in reaction system, including major catalyst shown in formula (I), help and urge
Agent, water and organic solvent, are sufficiently stirred；(4) be passed through ethene and start oligomerisation reaction, keep reaction pressure be 0.1~30MPa and
Reaction temperature is that 30~100min is reacted at -20~150 DEG C；(5) stop reaction, take reaction product to be carried out (GC) with gas-chromatography
Analysis.
In the present invention, described major catalyst and co-catalyst add reactant after first being dissolved with organic solvent
System.The organic solvent is selected from toluene, hexamethylene, ether, tetrahydrofuran, ethanol, benzene, dimethylbenzene and dichloromethane, preferably selects
From toluene and dimethylbenzene.Being blended under ethene atmosphere for the oligomerisation reaction process, major catalyst and co-catalyst is carried out.It is described
The temperature of oligomerisation reaction is -20~150 DEG C, preferably 0~80 DEG C, more preferably 5~35 DEG C.The pressure of the reaction is 0.1
~30MPa, with ethylene pressure rise oligomerization activity rise.
Ethylene oligomerization is carried out using carbon monoxide-olefin polymeric of the present invention, the ethylene oligomerization product of acquisition includes C4、C6、
C8、C10、C12、C14、C16、C18、C20、C22Deng；The selectivity of alpha-olefin can reach more than 96%.Terminate in ethylene oligomerization reaction
Afterwards, GC analyses are carried out.As a result show, oligomerization activity is up to 107g·mol(Fe)-1·h-1More than.In addition, remaining reaction is mixed
The ethanol solution that compound is acidified with 5% watery hydrochloric acid neutralizes, and does not obtain polymer.
According to carbon monoxide-olefin polymeric provided by the invention, ethene is including the major catalyst chlorination 2- (1H- shown in formula (I)
2- benzimidazolyls) -8- acetophenone amidos quinoline closes chromium (III), the composition containing aluminum cocatalyst, water and organic solvent acts on
Lower carry out oligomerisation reaction, there is higher oligomerisation reaction activity on the contrary, the selectivity of alpha-olefin is high, and oligomerisation reaction initiation is fast
Speed, operate steadily, be reproducible.According to the present invention, under the conditions of low-down Al/Cr ratios, still have preferably neat
Poly- reactivity.According to the present invention, when the reaction is performed at a lower temperature, still with high oligomerisation reaction activity.According to
The present invention, the technology prejudice of those skilled in the art is overcome, achieves unexpected technique effect.
Embodiment
Below in conjunction with specific embodiment, the present invention is further elaborated and explanation, but does not form to any of the present invention
Limitation.
Embodiment 1
Catalyst chlorination 2- 1. (1H-2- benzimidazolyls) -8- acetophenone amidos quinoline closes the synthesis of chromium (III)
Chlorination 2- is made in preparation method according to document (Organometallics 2011,30,3001-3009) report
(1H-2- benzimidazolyls) -8- acetophenone amidos quinoline closes chromium (III) complex.
2. ethylene oligomerization reacts, specifically comprise the following steps：(1) dried by high temperature, the operation such as vacuum displacement is to reaction
System enters line replacement, it is ensured that anhydrous and oxygen-free in reaction system；(2) line replacement is entered to reaction system using ethene, makes reaction system
In ethene environment；(3) water and toluene solvant are added in a kettle, and adding 1.37ml triethyl aluminums toluene solution, (concentration is
715 μm of ol/ml), the toluene for adding 2ml chlorinations 2- (1H-2- benzimidazolyls) -8- acetophenone amidos quinoline conjunction chromium (III) is molten
After liquid (concentration is 2.5 μm of ol/ml), it is 100ml to make total composition, wherein, using the weight of organic solvent (i.e. toluene) as meter
Benchmark is calculated, the weight content of water is 5ppm, Al/Cr=196, after being sufficiently stirred, is passed through ethene and starts oligomerisation reaction；(4) keep
Ethylene pressure is 1MPa and reaction temperature is to be reacted 30 minutes at 30 DEG C；(7) stop reaction, take out a small amount of reaction product gas phase
Chromatogram carries out (GC) analysis：Oligomerization activity is 0.41 × 107g·mol(Cr)-1·h-1, oligomer content is respectively
C443.20%, C6~C1045.94%, C6~C1855.29% (wherein containing linear alpha-alkene 96.6%), C20~C280.38%.It is surplus
The ethanol solution that remaining mixture is acidified with 5% hydrochloric acid neutralizes, and does not obtain polymer.Analysis result is shown in Table one.
Embodiment 2
With embodiment 1, difference is, the weight content of water is 20ppm.Data are shown in Table 1.
Embodiment 3
With embodiment 1, difference is, the weight content of water is 50ppm.Data are shown in Table 1.
Embodiment 4
With embodiment 1, difference is, the weight content of water is 100ppm.Data are shown in Table 1.
Embodiment 5
With embodiment 1, difference is, the weight content of water is 200ppm.Data are shown in Table 1.
Embodiment 6
With embodiment 1, difference is, the weight content of water is 260ppm.Data are shown in Table 1.
Embodiment 7
With embodiment 1, difference is, the weight content of water is 350ppm, and data are shown in Table 1.
Embodiment 8
With embodiment 1, difference is, the weight content of water is 100ppm, and reaction temperature is 0 DEG C.Data are shown in Table 1.
Embodiment 9
With embodiment 1, difference is, the weight content of water is 100ppm, and reaction temperature is -10 DEG C.Data are shown in Table
1。
Embodiment 10
With embodiment 1, difference is, the weight content of water is 100ppm, and reaction temperature is -20 DEG C.Data are shown in Table
1。
Embodiment 11
With embodiment 1, difference is, the weight content of water is 100ppm, and reaction temperature is 40 DEG C.Data are shown in Table 1.
Embodiment 12
With embodiment 1, difference is, the weight content of water is 100ppm, Al/Fe=500.Data are shown in Table 1.
Comparative example 1
With embodiment 1, difference is, anhydrous in composition.Data are shown in Table 1.
Table 1
It can be seen from the data in Table 1 that according to carbon monoxide-olefin polymeric provided by the invention, ethene is including formula (I) Suo Shi
Major catalyst chlorination 2- (1H-2- benzimidazolyls) -8- acetophenone amidos quinoline close chromium (III) complex, co-catalysis containing aluminium
The composition effect of agent, water and organic solvent is lower to carry out oligomerisation reaction, has higher oligomerisation reaction activity on the contrary, alpha-olefin
Selectivity is high, and oligomerisation reaction initiation is rapid, operates steadily, be reproducible.According to the present invention, even in low-down Al/Fe
Than under the conditions of, still with preferable oligomerisation reaction activity.According to the present invention, when the reaction is performed at a lower temperature, still
With high oligomerisation reaction activity.
It should be noted that embodiment described above is only used for explaining the present invention, do not form to any of the present invention
Limitation.By referring to exemplary embodiments, invention has been described, it should be appreciated that word wherein used is descriptive
With explanatory vocabulary, rather than limited vocabulary.The present invention can be made within the scope of the claims by regulation
Modification, and the present invention is revised in without departing substantially from scope and spirit of the present invention.Although the present invention described in it relates to
And specific method, material and embodiment, it is not intended that the present invention is limited to wherein disclosed particular case, on the contrary, this hair
It is bright to can be extended to other all methods and applications with identical function.
Claims (22)
1. a kind of ethylene oligomerization carbon monoxide-olefin polymeric, including major catalyst chlorination 2- (the 1H-2- benzimidazoles shown in formula (I)
Base) -8- acetophenone amidos quinoline close chromium (III), containing aluminum cocatalyst, water and organic solvent：
In formula, R1~R5It is each independently selected from hydrogen, C1~C6Alkyl, halogen, C1~C6Alkoxy and nitro；
In the carbon monoxide-olefin polymeric, using the weight of organic solvent as calculating benchmark, the weight content of water is 5~350ppm；
The organic solvent is selected from toluene, ether, tetrahydrofuran, ethanol, benzene, dimethylbenzene and dichloromethane；
The mol ratio of aluminium and chromium in major catalyst is 30-196 in the co-catalyst:1；
It is described to be selected from aikyiaiurnirsoxan beta and alkyl aluminum compound containing aluminum cocatalyst.
2. carbon monoxide-olefin polymeric according to claim 1, it is characterised in that in the carbon monoxide-olefin polymeric, with organic molten
The weight of agent is calculating benchmark, and the weight content of water is 20~260ppm.
3. carbon monoxide-olefin polymeric according to claim 2, it is characterised in that in the carbon monoxide-olefin polymeric, with organic molten
The weight of agent is calculating benchmark, and the weight content of water is 50~200ppm.
4. carbon monoxide-olefin polymeric according to claim 1, it is characterised in that in the carbon monoxide-olefin polymeric, with organic molten
The volume of agent is calculating benchmark, and the content of the major catalyst is 2~500 μm of ol/L.
5. carbon monoxide-olefin polymeric according to claim 4, it is characterised in that in the carbon monoxide-olefin polymeric, with organic molten
The volume of agent is calculating benchmark, and the content of the major catalyst is 20~100 μm of ol/L.
6. carbon monoxide-olefin polymeric according to claim 1, it is characterised in that the organic solvent is selected from toluene and diformazan
Benzene.
7. carbon monoxide-olefin polymeric according to claim 1, it is characterised in that in the co-catalyst in aluminium and major catalyst
The mol ratio of chromium is 100-196:1.
8. carbon monoxide-olefin polymeric according to claim 7, it is characterised in that in the co-catalyst in aluminium and major catalyst
The mol ratio of chromium is 148-196:1.
9. carbon monoxide-olefin polymeric according to claim 1, it is characterised in that the R in the major catalyst1-R5It is each independent
Ground is selected from hydrogen, methyl, ethyl, n-propyl, isopropyl, fluorine, chlorine, bromine, methoxyl group, ethyoxyl and nitro.
10. carbon monoxide-olefin polymeric according to claim 9, it is characterised in that the R in the major catalyst1And R5For first
Base, and R2-R4It is hydrogen.
11. the carbon monoxide-olefin polymeric according to any one in claim 1~10, it is characterised in that described helped containing aluminium is urged
Agent is alkyl aluminum compound.
12. carbon monoxide-olefin polymeric according to claim 11, it is characterised in that the formula of the alkyl aluminum compound is
AlRnXm, wherein R is each independently straight or branched C1-C8Alkyl；X is halogen；N be 1~3 integer, m be 0~2 it is whole
Number, and m+n is equal to 3.
13. carbon monoxide-olefin polymeric according to claim 12, it is characterised in that in the formula of the alkyl aluminum compound, X
For chlorine or bromine.
14. carbon monoxide-olefin polymeric according to claim 12, it is characterised in that the alkyl aluminum compound is selected from trimethyl
Aluminium, triethyl aluminum, tri-propyl aluminum, triisobutyl aluminium, tri-n-hexyl aluminum, tri-n-octylaluminium, diethylaluminum chloride and dichloride second
Base aluminium.
15. carbon monoxide-olefin polymeric according to claim 14, it is characterised in that the alkyl aluminum compound is selected from triethyl group
Aluminium.
16. carbon monoxide-olefin polymeric according to claim 1, it is characterised in that the aikyiaiurnirsoxan beta is C1-C4Alkylaluminoxane,
Wherein C1-C4Alkyl is the alkyl of straight or branched.
17. carbon monoxide-olefin polymeric according to claim 16, it is characterised in that the aikyiaiurnirsoxan beta be selected from MAO,
Modified methylaluminoxane, ethylaluminoxane and isobutyl aluminium alkoxide.
18. carbon monoxide-olefin polymeric according to claim 17, it is characterised in that the aikyiaiurnirsoxan beta is MAO.
19. a kind of ethylene oligomerization method, the work of ethene carbon monoxide-olefin polymeric described in any one in claim 1-18
Oligomerisation reaction is carried out under.
20. according to the method for claim 19, it is characterised in that the temperature of the oligomerisation reaction is -20~150 DEG C.
21. according to the method for claim 20, it is characterised in that the temperature of the oligomerisation reaction is 0~80 DEG C.
22. according to the method for claim 21, it is characterised in that the temperature of the oligomerisation reaction is 5~35 DEG C.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6825297B1 (en) * | 1999-05-14 | 2004-11-30 | The Dow Chemical Company | Transition metal complexes and olefin polymerization process |
| CN102199173A (en) * | 2011-04-07 | 2011-09-28 | 中国科学院化学研究所 | 2-benzimidazolyl-8-methanamide quinoline chromium complexes, its preparation method and application |
| CN102206127A (en) * | 2010-03-31 | 2011-10-05 | 中国石油化工股份有限公司 | Ethylene oligomerization method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6825297B1 (en) * | 1999-05-14 | 2004-11-30 | The Dow Chemical Company | Transition metal complexes and olefin polymerization process |
| CN102206127A (en) * | 2010-03-31 | 2011-10-05 | 中国石油化工股份有限公司 | Ethylene oligomerization method |
| CN102199173A (en) * | 2011-04-07 | 2011-09-28 | 中国科学院化学研究所 | 2-benzimidazolyl-8-methanamide quinoline chromium complexes, its preparation method and application |
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