Patent US3419722A successfully refreshed from Google Patents.
Patent US3879368A successfully refreshed from Google Patents.
US3879368A
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US
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Catalyst modified with certain strong reducing agents and silane compounds and use in polymerization of olefins
Assignee: Union Carbide Corp
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Filing: 1973-06-25
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Granted: 1975-04-22
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Expires: 1993-06-25
Abstract
Abstract Strong reducing agents which are devoid of halogen atoms and certain silane compounds are used with supported bis(cyclopentadienyl)chromium (II) catalysts for the polymerization of olefins in order to obtain higher yields of polymer and allow for the use of supports which are activated at relatively low temperatures, and thus provide for a broader range of molecular weight distributions in the polymers made therewith.
Inventors
- 👤 Robert N Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:06
CPC Classifications
C; C08; C08F; C08F10/00; C08F36/00; C08F36/02; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/639; C08F4/63912; C08F4/63916; C08F4/6392; C08F4/63922; C08F4/63925
Claims Analysis
Total Claims: 52
Claim 1
Independent Claim
29 words
IN A PROCESS FOR POLYMERIZING A MONOMER CHARGE COMPRISING AT LEAST ONE ALPHA OLEFIN BY CONTACTING IT WITH A CATALYST COMPRISING AT LEAST ONE BIS(CYCLOPENTADIENYL)CHROMIUM(II) COMPOUND HAVING THE STRUCTURE
Claim 2
Dependent Claim
29 words
IN A PROCESS FOR POLYMERIZING A MONOMER CHARGE COMPRISING AT LEAST ONE ALPHA OLEFIN BY CONTACTING IT WITH A CATALYST COMPRISING AT LEAST ONE BIS(CYCLOPENTADIENYL)CHROMIUM(II) COMPOUND HAVING THE STRUCTURE
Claim 3
Dependent Claim
29 words
In a process for polymerizing a monomer charge comprising at least one alpha olefin by contacting it with a catalyst comprising at least one bis(cyclopentadienyl)chromium(II) compound having the structure
Claim 4
Dependent Claim
29 words
In a process for polymerizing a monomer charge comprising at least one alpha olefin by contacting it with a catalyst comprising at least one bis(cyclopentadienyl)chromium(II) compound having the structure
Claim 5
Dependent Claim
15 words
A process as in claim 1 in which said silane compound has the structure R4-nSiHn.
Claim 6
Dependent Claim
13 words
A process as in claim 2 in which said monomer charge comprises ethylene.
Claim 7
Dependent Claim
11 words
A process as in claim 3 in which ethylene is homopolymerized.
Claim 8
Dependent Claim
16 words
A process as in claim 4 in which said strong reducing agent is an organometallic compound.
Claim 9
Dependent Claim
52 words
A process as in claim 5 in which said strong reducing agent has the structure R''''yAlHz wherein R'''' is a C1 to C14 alkyl group, y is an integer from 1 to 3, inclusive, z is an integer from 0 to 2, inclusive, and the sum of y and z is 3.
Claim 10
Dependent Claim
13 words
A process as in claim 6 in which z is 0 or 1.
Claim 11
Dependent Claim
17 words
A process as in claim 7 in which the aluminum alkyl compound is an aluminum trialkyl compound.
Claim 12
Dependent Claim
15 words
A process as in claim 8 in which said aluminum trialkyl compound is triethyl aluminum.
Claim 13
Dependent Claim
46 words
A process as in claim 5 in which said strong reducing agent has the structure. R''''''xA1(OR'''''')w wherein R'''''' is a C1 to C14 hydrocarbyl group, and x and w are each integers from 1 to 2, inclusive, and the sum of x and w is 3.
Claim 14
Dependent Claim
17 words
A process as in claim 10 in which said strong reducing agent is an aluminum ethoxide compound.
Claim 15
Dependent Claim
16 words
A process as in claim 11 in which said strong reducing agent is diethyl aluminum ethoxide.
Claim 16
Dependent Claim
96 words
A process as in claim 5 in which said strong reducing agent has the structure Me''R'''', (Me-Me(R'''')b or (R-Me-Me-R'''')c wherein R'''' is a monovalent C1 to C14 hydrocarbon group, Me is a polyvalent, and Me'' is a monovalent metal or metalloid selected from the group consisting of B, Zn, Mg, Li, Na, K, Ca, Ga, In, Cd, Sc, Y, La, Ge, Ns, Sb, and Bi, a is 0 or 1, b is an integer such that a+b equals the valence of Me, and c is an integer which is 1 less than the valence of Me.
Claim 17
Dependent Claim
18 words
A process as in claim 13 in which said strong reducing agent has the structure Me''R'''' or (Me-Me-(R'''')b
Claim 18
Dependent Claim
11 words
A process as in claim 14 in which Me'' is Li.
Claim 19
Dependent Claim
15 words
A process as in claim 15 in which the strong reducing agent is butyl lithium.
Claim 20
Dependent Claim
11 words
A process as in claim 14 in which Me is Mg.
Claim 21
Dependent Claim
15 words
A process as in claim 17 in which the strong reducing agent is diethyl magnesium.
Claim 22
Dependent Claim
14 words
A process as in claim 1 which is conducted in an inert solvent medium.
Claim 23
Dependent Claim
13 words
A process as in claim 19 which is conducted under slurry polymerization conditions.
Claim 24
Dependent Claim
13 words
A process as in claim 1 in which n'' and n'''' are 0.
Claim 25
Dependent Claim
13 words
A process as in claim 21 in which the inorganic oxide comprises silica.
Claim 26
Dependent Claim
13 words
A process as in claim 22 in which the inorganic oxide comprises silica-alumina.
Claim 27
Dependent Claim
13 words
A process as in claim 23 in which said monomer charge comprises ethylene.
Claim 28
Dependent Claim
11 words
A process as in claim 23 in which ethylene is homopolymerized.
Claim 29
Dependent Claim
77 words
A process as in claim 21 in which said strong reducing agent is selected from the group consisting of a. metals of Groups IA and IIA of the Mendeleef Periodic table which have an atomic weight of <200, b. inorganic or organic compounds of said a) metals, and c. inorganic or organic compounds of boron, bismuth and metals of Groups IIB, IIIA, IIIB, IVA and VA of said Periodic table which have an atomic weight of <200.
Claim 30
Dependent Claim
17 words
A process as in claim 26 in which said strong reducing agent is an aluminum alkyl compound.
Claim 31
Dependent Claim
15 words
A process as in claim 27 in which said aluminum alkyl compound is triethyl aluminum.
Claim 32
Dependent Claim
17 words
A process as in claim 26 in which said strong reducing agent is an aluminum alkoxide compound.
Claim 33
Dependent Claim
16 words
A process as in claim 29 in which said aluminum alkoxide compound is diethyl aluminum etHoxide.
Claim 34
Dependent Claim
17 words
A process as in claim 26 in which said strong reducing agent is a lithium alkyl compound.
Claim 35
Dependent Claim
15 words
A process as in claim 31 in which said lithium alkyl compound is butyl lithium.
Claim 36
Dependent Claim
17 words
A process as in claim 26 in which said strong reducing agent is a magnesium alkyl compound.
Claim 37
Dependent Claim
15 words
A process as in claim 33 in which said magnesium alkyl compound is diethyl magnesium.
Claim 38
Dependent Claim
15 words
An olefin polymerization catalyst which comprises at least one bis(cyclopentadienyl)chromium( II) compound having the structure
Claim 39
Dependent Claim
15 words
An olefin polymerization catalyst which comprises at least one bis(cyclopentadienyl)chromium( II) compound having the structure
Claim 40
Dependent Claim
18 words
A catalyst as in claim 35 in which said strong reducing agent contains one or more organic radicals.
Claim 41
Dependent Claim
52 words
A catalyst as in claim 36 in which said strong reducing agent has the structure R''''yA1Hz wherein R'''' is a C1 to C14 alkyl group, y is an integer from 1 to 3, inclusive, z is an integer from 0 to 2, inclusive, and the sum of y and z is 3.
Claim 42
Dependent Claim
13 words
a catalyst as in claim 37 in which z is 0 or 1.
Claim 43
Dependent Claim
17 words
A catalyst as in claim 38 in which the aluminum alkyl compound is an aluminum trialkyl compound.
Claim 44
Dependent Claim
15 words
A catalyst as in claim 39 in which said aluminum trialkyl compound is triethyl aluminum.
Claim 45
Dependent Claim
46 words
A catalyst as in claim 36 in which said strong reducing agent has the structure R''''''xAl(OR'''''')w wherein R'''''' is a C1 to C14 hydrocarbyl group, and x and w are each integers from 1 to 2, inclusive, and the sum of x and w is 3.
Claim 46
Dependent Claim
17 words
A catalyst as in claim 41 in which said strong reducing agent is an aluminum ethoxide compound.
Claim 47
Dependent Claim
16 words
A catalyst as in claim 42 in which said aluminum ethoxide compound is diethyl aluminum ethoxide.
Claim 48
Dependent Claim
96 words
A catalyst as in claim 36 in which said strong reducing agent has the structure Me''R'''', (MeMe(R'''')b or (RMe-MeR'''')c wherein R'''' is a monovalent C1 to C14 hydrocarbon group, Me is a polyvalent, and Me'' is a monovalent, metal or metalloid selected from the group consisting of B, Zn, Mg, Li, Na, K, Ca, Ga, In, Cd, Sc, Y, La, Ge, Sn, Sb and Bi, a is 0 or 1, b is an integer such that a+b equals the valence of Me, and c is an integer which is one less than the valence of Me.
Claim 49
Dependent Claim
18 words
A catalyst as in claim 44 in which said strong reducing agent has the structure Me''R'''' or (Me-Me-R'''')b
Claim 50
Dependent Claim
11 words
A catalyst as in claim 45 in which Me'' is Li.
Claim 51
Dependent Claim
15 words
A catalyst as in claim 46 in which said strong reducing agenT is butyl lithium.
Claim 52
Dependent Claim
11 words
A catalyst as in claim 45 in which Me is Mg.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |