US4027087A
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Method for producing ethylene polymers
Assignee: JNC Corp
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Filing: 1972-10-30
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Granted: 1977-05-31
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Expires: 1992-10-30
Abstract
Abstract Ethylene can be polymerized or copolymerized by the use of a catalyst prepared by mixing a trivalent metal halide with a metal carbonate or/and a metal hydrogen carbonate, reacting the resulting mixture with a transition metal compound in the presence of an aromatic compound, and activating the resulting solid product with an organoaluminum compound. By substituting said metal carbonate or/and metal hydrogen carbonate for metal salt hydrates, sulfide hydrates, hydroxides or hydroxide hydrates, or metal oxides in our prior art, drawbacks such as dehydrochlorination in the preparation of catalyst or difficulty in removal of catalyst residue from polymer can be overcome while various advantages in our prior art are still maintained.
Inventors
- 👤 Akihiro Satoh
- 👤 Shiro Konotsune
- 👤 Atsuyuki Kachi
- 👤 Hiroshi Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:08
CPC Classifications
C; C08; C08F; C08F10/00; C08F2410/00; C08F2410/04; Y; Y10; Y10S; Y10S526/00; Y10S526/903
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
139 words
A method for producing ethylene polymers which comprises polymerizing ethylene alone, ethylene with an α-olefin or ethylene with styrene at -50° to about 150° C. at atmospheric pressure to 100 kg/cm 2 , in the presence of a catalyst obtained by (i) mixing a trivalent metal halide selected from the group consisting of AlCl 3 , AlBr 3 and FeCl 3 with a carbonate of metals belonging to I, II & IV, VII and VIII groups of the periodic table and/or a hydrogen carbonate of metals belonging to I group of the periodic table, (ii) reacting the resulting mixture with a compound of transition metals belonging to IV a and V a groups of the periodic table in the presence of an aromatic compound having no active hydrogen, and (iii) combining the resulting solid product with an organoaluminum compound.
Claim 2
Independent Claim
139 words
A method for producing ethylene polymers which comprises polymerizing ethylene alone, ethylene with an α-olefin or ethylene with styrene at -50° to about 150° C. at atmospheric pressure to 100 kg/cm 2 , in the presence of a catalyst obtained by (i) mixing a trivalent metal halide selected from the group consisting of AlCl 3 , AlBr 3 and FeCl 3 with a carbonate of metals belonging to I, II & IV, VII and VIII groups of the periodic table and/or a hydrogen carbonate of metals belonging to I group of the periodic table, (ii) reacting the resulting mixture with a compound of transition metals belonging to IV a and V a groups of the periodic table in the presence of an aromatic compound having no active hydrogen, and (iii) combining the resulting solid product with an organoaluminum compound.
Claim 3
Dependent Claim
44 words
A method according to claim 1, wherein said polymerizing is carried out in the copresence of 10- 80% by volume of hydrogen based on the total volume of ethylene alone, ethylene with an α-olefin or ethylene with styrene and hydrogen, and a titanium alkoxide.
Claim 4
Dependent Claim
14 words
A method according to claim 2, wherein said titanium alkoxide is a titanium tetraalkoxide.
Claim 5
Dependent Claim
24 words
A method according to claim 2, wherein said titanium alkoxide is selected from the group consisting of titanium n-butoxide, titanium tetraethoxide and titanium tetramethoxide.
Claim 6
Dependent Claim
73 words
A method according to claim 1, wherein said carbonate is selected from the group consisting of Li 2 CO 3 , Na 2 CO 3 , K 2 CO 3 , Cs 2 CO 3 , Ag 2 CO 3 , CaCO 3 , MgCO 3 , BaCO 3 , ZnCO 3 , CdCO 3 , T1 2 CO 3 , PbCO 3 , MnCO 3 , FeCO 3 and NiCO 3 .
Claim 7
Dependent Claim
19 words
A method according to claim 1, wherein said hydrogen carbonate is selected from NaHCO 3 and KHCO 3 .
Claim 8
Dependent Claim
45 words
A method according to claim 1, wherein said aromatic compound having no active hydrogen is selected from the group consisting of benzene, naphthalene, pyridine, toluene, xylene, mesitylene, durene, ethylbenzene, isopropylbenzene, 2-ethylnaphthalene, 1-phenylnaphthalene, dimethylaniline, N-methyl-diphenylamine, triphenylamine, nitrobenzene, nitrosobenzene, p-nitrotoluene, monochlorobenzene, o-chlorobenzene, anisole, phenylether, styrene and divinylbenzene.
Claim 9
Dependent Claim
35 words
A method according to claim 1, wherein said compound of transition metals is selected from the group consisting of titanium tetrachloride, titanium monoethoxy- trichloride, titanium tetrabutoxide, titanium tetraethoxide, titanium tetramethoxide, vanadium tetrachloride and vanadium oxytrichloride.
Claim 10
Dependent Claim
26 words
A method according to claim 1, wherein said organoaluminum compound is selected from the group consisting of trimethylaluminum, triethylaluminum, triisobutylaluminum, diethylaluminumchloride, ethylaluminum sesquichloride, and monoethylaluminum dichloride.
Claim 11
Dependent Claim
20 words
A method according to claim 2, wherein said reacting (ii) is carried out at a temperature of 50- 200° C.
Claim 12
Dependent Claim
28 words
The method of claim 1 wherein the trivalent metal halide is employed in an amount of 0.01 to 2 moles per mole of the carbonate and/or hydrogen carbonate.
Claim 13
Dependent Claim
34 words
The method of claim 1 wherein the reaction is carried out at a temperature in the range from 20° to 100° C. and at a pressure from atmospheric pressure to 40 kg/cm 2 .
Claim 14
Dependent Claim
20 words
The method of claim 1 wherein the polymerization reaction is carried out in the presence of an inert hydrocarbon solvent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |