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US5120868A
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Catalyst system and process for the selective production of isoprenylalkyletheres from isoprene
Assignee: SnamProgetti SpA
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Filing: 1991-03-28
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Granted: 1992-06-09
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Expires: 2011-03-28
Abstract
Abstract A catalyst system for the selective production of isoprenylalkylethers from isoprene is described, characterized by satisfying the following empirical formula PdLxL.sup.' y where L is a phosphorated binder in the form of an organic derivative of trivalent phosphorus of type R3P or R2P[CH(R)]zPR2, in which the substituents R, which can be identical or different, are either hydrogen atoms or alkyl, cycloalkyl, aryl, alkoxy, aryloxy, arylthio or arylalkyl groups, and in which z is a whole number between 1 and 5; L ' is an easily displaceable binder chosen from dienes, olefins, anhydrides, diketones and nitriles; x is a whole number between 0 and 4 and y is a whole number between 0 and 3, in which system excess phosphorated compounds of R3P or R2P[CH(R)]zPR2 type may or may not be present.
Inventors
- 👤 Renata Patrini
- 👤 Mario Marchionna
- 👤 Massimo Lami
- 👤 Francesco Ancillotti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:44
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/24; B01J31/2404; B01J31/2409; C; C07; C07C; C07C41/00; C07C41/01; C07C41/05; C07C41/06; B01J2231/00; B01J2231/30; B01J2231/32; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/824; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2282; B01J31/2291; C07C2601/00; C07C2601/06; C07C2601/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
129 words
A catalyst system for the selective production of isoprenyl-alkylethers from isoprene, characterised by satisfying the following empirical formula PdLxL'y where L is a phosphorated binder in the form of an organic derivative of trivalent phosphorus of type R 3 P or R 2 P[CH(R)] z PR 2 , in which the substituents R, which can be identical or different, are either hydrogen atoms or alkyl, cycloalkyl, aryl, alkoxy, aryloxy, arylthio or arylalkyl groups, and in which z is a whole number between 1 and 5; L' is an easily displaceable binder chosen from dienes, olefins, anhydrides, diketones and nitriles; x is a whole number between 0 and 4 and y is a whole number between 0 and 3, the sum of x+y being greater than or equal to 2.
Claim 2
Dependent Claim
129 words
A catalyst system for the selective production of isoprenyl-alkylethers from isoprene, characterised by satisfying the following empirical formula PdLxL'y where L is a phosphorated binder in the form of an organic derivative of trivalent phosphorus of type R 3 P or R 2 P[CH(R)] z PR 2 , in which the substituents R, which can be identical or different, are either hydrogen atoms or alkyl, cycloalkyl, aryl, alkoxy, aryloxy, arylthio or arylalkyl groups, and in which z is a whole number between 1 and 5; L' is an easily displaceable binder chosen from dienes, olefins, anhydrides, diketones and nitriles; x is a whole number between 0 and 4 and y is a whole number between 0 and 3, the sum of x+y being greater than or equal to 2.
Claim 3
Dependent Claim
26 words
A catalyst system as claimed in claim 1, wherein the alkyl, cycloalkyl, aryl, alkoxy, aryloxy, arylthio and arylalkyl groups contain between 1 and 10 carbon atoms.
Claim 4
Dependent Claim
29 words
A catalyst system as claimed in claim 1, wherein the aryl groups of part of the substituents R are substituted at the ring by other halogen or alkoxy groups.
Claim 5
Dependent Claim
25 words
A catalyst system as claimed in claim 2, wherein the phosphorated binder L of R 3 P type is chosen from trialkylphosphines and alkyl-aryl phosphines.
Claim 6
Dependent Claim
25 words
A catalyst system as claimed in claim 4, wherein tri-n-butylphosphine or triethyl-phosphine is chosen from the trialkylphosphines, and di-n-butylphenylphosphine is chosen from the alkyl-aryl phosphines.
Claim 7
Dependent Claim
27 words
A catalyst system as claimed in claim 1, wherein z is equal to 4 in the phosphorated binder L of R 2 P[CH(R)] z PR 2 type.
Claim 8
Dependent Claim
15 words
A catalyst system as claimed in claim 6, wherein the phosphorated binder is 1,4-bis(diphenyl-phosphino)butane (DPPB).
Claim 9
Dependent Claim
25 words
A catalyst system as claimed in claim 1, wherein the diene used as the easily displaceable binder L' is chosen from butadiene, isoprene and 1,5-cyclooctadiene.
Claim 10
Dependent Claim
20 words
A catalyst system as claimed in claim 1, wherein the olefin used as the easily displaceable binder L' is ethylene.
Claim 11
Dependent Claim
21 words
A catalyst system as claimed in claim 1, wherein the anhydride used as the easily displaceable binder L' is maleic anhydride.
Claim 12
Dependent Claim
20 words
A catalyst system as claimed in claim 1, wherein the diketone used as the easily displaceable binder L' is dibenzylideneacetone.
Claim 13
Dependent Claim
24 words
A catalyst system as claimed in claim 1, wherein the nitrile used as the easily displaceable binder L' is chosen from acetonitrile and benzonitrile.
Claim 14
Dependent Claim
26 words
A catalyst system as claimed in claim 1, wherein excess phosphorated compounds of R 3 P or R 2 P[CH(R)] z PR 2 type are present.
Claim 15
Dependent Claim
22 words
A catalyst system as claimed in claim 13, wherein the excess phosphorated compounds are chosen from tri-n-butylphosphine, triethylphosphine, di-n-butylphenylphosphine and 1,4-bis(diphenyl-phosphino)butane (DPPB).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-09 | 1995-12-09 | 1996-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-09 | 1999-12-09 | 2000-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-09 | 2003-12-09 | 2004-06-09 | $7700.00 | Window Closed / Lapsed |