Patent US3282901A successfully refreshed from Google Patents.
US3282901A
Expired / Lapsed
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Process for the production of polymeric mercaptans
Assignee: Phillips Petroleum Co
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Filing: 1961-11-06
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Granted: 1966-11-01
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Expires: 1981-11-06
Abstract
No abstract record available.
Inventors
- 👤 Paul F Warner
- 👤 Richard D Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:29
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
IN A PROCESS FOR THE PRODUCTION OF POLYMERIC MERCAPTANS COMPRISING CONTACING A LIQUID COPOLYMER OF A CONJUGATED DIENE OF 4 TO 10 CARBON ATOMS WITH H2S AT AN ELEVATED TEMPERATURE AND A FIXED BED OF A COBALT MOLYBDATE CATALYST ACTIVE FOR PROMOTING THE REACTION OF SAID POLYMER WITH H2S TO FORM SAID POLYMERIC MERCAPTAN, AND RECOVERING SAID MERCAPTAN PRODUCT SO PRODUCED, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID CONTACTING IN THE PRESENCE OF A SMALL AMOUNT OF ADDED UNCOMBINED HYDROGEN RANGING FROM 0.1 TO 5 MOLS PER DIENE MONOMER UNIT IN SAID POLYMER SUFFICIENT TO MINIMIZE THE FORMATION OF ISOLUBLE MATERIALS DURING SAID CONTACTING, THUS EXTENDING AT LIFE OF SAID CATALYST.
Claim 2
Dependent Claim
111 words
IN A PROCESS FOR THE PRODUCTION OF POLYMERIC MERCAPTANS COMPRISING CONTACING A LIQUID COPOLYMER OF A CONJUGATED DIENE OF 4 TO 10 CARBON ATOMS WITH H2S AT AN ELEVATED TEMPERATURE AND A FIXED BED OF A COBALT MOLYBDATE CATALYST ACTIVE FOR PROMOTING THE REACTION OF SAID POLYMER WITH H2S TO FORM SAID POLYMERIC MERCAPTAN, AND RECOVERING SAID MERCAPTAN PRODUCT SO PRODUCED, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID CONTACTING IN THE PRESENCE OF A SMALL AMOUNT OF ADDED UNCOMBINED HYDROGEN RANGING FROM 0.1 TO 5 MOLS PER DIENE MONOMER UNIT IN SAID POLYMER SUFFICIENT TO MINIMIZE THE FORMATION OF ISOLUBLE MATERIALS DURING SAID CONTACTING, THUS EXTENDING AT LIFE OF SAID CATALYST.
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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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |