US3865797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of petroleum resins of varying softening points
Assignee: Imperial Chemical Industries Ltd
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Filing: 1973-09-24
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Granted: 1975-02-11
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Expires: 1993-09-24
Abstract
Abstract A petroleum resin feedstock comprises a C5 stream distilled from a cracked petroleum fraction to which has been added butadiene raffinate which comprises isobutene, butenes-1 and -2 and butanes and which is what remains of a C4 fraction after removal of butadiene. The feedstock may be polymerised to a petroleum resin by means of a Friedel Crafts catalyst.
Inventors
- 👤 David Richard Joy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:27
CPC Classifications
C; C08; C08F; C08F240/00; C08F10/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
A PROCESS FOR THE PRODUCTION OF PETROLEUM RESINS OF VARYING SOFTENING POINTS IN WHICH THE RESIDUE REMAINING AFTER THE REMOVAL OF BUTADIENE FROM A C4 FRACTION AND WHICH CONSISTS OF ISO-BUTENE, BUTENE-1, CIS- AND TRANS-BUTENE-2 AND BUTANES IS ADDED TO A C5 STREAM BOILING IN THE RANGE 10* TO 80* C WHICH IS DERIVED FROM A THERMALLY OR STEAM CRACKED NAPHTHA OR GAS OIL AND THE RESULTING MIXTURE POLYMERIZED BY MEANS OF A FRIEDEL CRAFTS CATALYST, THE AMOUNT OF SAID RESIDUE ADDED BEING CHOSEN TO ACHIEVE LOWERING THE SOFTENING POINT IN THE RESIN.
Claim 2
Dependent Claim
93 words
A PROCESS FOR THE PRODUCTION OF PETROLEUM RESINS OF VARYING SOFTENING POINTS IN WHICH THE RESIDUE REMAINING AFTER THE REMOVAL OF BUTADIENE FROM A C4 FRACTION AND WHICH CONSISTS OF ISO-BUTENE, BUTENE-1, CIS- AND TRANS-BUTENE-2 AND BUTANES IS ADDED TO A C5 STREAM BOILING IN THE RANGE 10* TO 80* C WHICH IS DERIVED FROM A THERMALLY OR STEAM CRACKED NAPHTHA OR GAS OIL AND THE RESULTING MIXTURE POLYMERIZED BY MEANS OF A FRIEDEL CRAFTS CATALYST, THE AMOUNT OF SAID RESIDUE ADDED BEING CHOSEN TO ACHIEVE LOWERING THE SOFTENING POINT IN THE RESIN.
Claim 3
Dependent Claim
22 words
The process of claim 1 in which the amount of residue which has been added is up to 30 percent by weight.
Claim 4
Dependent Claim
29 words
The process of claim 1 wherein the mixture has been heated to a temperature of at least 100* C so as to dimerise any mono-cyclopentadiene which may be present.
Claim 5
Dependent Claim
24 words
The process of claim 2 wherein the C5 stream contains cis-and trans- piperylene, n-pentane, isopentane, pentene-1, dicylopentadiene, trans-pentene-2, 2-methyl-butene-1, 3-methylbutene-1, 2-methylbutene-2, cyclopentene and cyclopentane.
Claim 6
Dependent Claim
31 words
The process of claim 1 in which the Friedel Crafts catalyst is a halide of an element selected from the group consisting of aluminium, iron, tin, boron, zinc, antimony and titanium.
Claim 7
Dependent Claim
20 words
The process of claim 5 in which the catalyst is aluminium chloride complexed with hydrogen chloride in an aromatic solvent.
Claim 8
Dependent Claim
43 words
The process of claim 6 in which the aromatic solvent is toluene, xylene or a benzene which is liquid at the temperature of the polymerisation and which is substituted by at least one secondary or tertiary alkyl group or by a cycloalkyl group.
Claim 9
Dependent Claim
48 words
A process for the production of a petroleum resin in which the feedstock of claim 4 is contacted with a catalyst comprising aluminium chloride and hydrogen chloride in toluene, xylene, cumene, tert-butylbenzene, p-cymene, p-isobutyl toluene or p-ethyl-tert.amylbenzene at a temperature in the range -100* C to +150* C.
References Cited (Backward Citations)
US3661870A
Cited
US3709854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |