US2878260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 1,2-ditolyethane
Assignee: Universal Oil Products Co
•
Filing: 1955-11-14
•
Granted: 1959-03-17
•
Expires: 1975-11-14
Abstract
No abstract record available.
Inventors
- 👤 Herman S Bloch
- 👤 Edward M Geiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:38
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/12; C07C15/18; C07C2/00; C07C2/86; C07C2/861; C07C2/862; C07C2/864; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/93; Y10S585/935
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A PROCESS FOR THE PREPARATION OF 1.2-DITOLYLETHANE WHICH COMPRISES CONDENSING TOLUENE WITH ETHYLENE CHLORHYDRIN, SAID TOLUENE BEING PRESENT IN A MOLAR EXCESS OVER SAID ETHYLENE CHLORHYDRIN, IN THE PRESENCE OF A MOLAR EXCESS OF PHOSPHORIC ACID CATALYST OVER SAID ETHYLENE CHLORHYDRIN AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 50* TO ABOUT 200*C., SEPARATING THE RESULTANT CONDENSATION PRODUCT, FURTHER CONDENSING SAID PRODUCT WITH TOLUENE IN THE PRESENCE OF A FRIEDEL-CRAFTS TYPE CATALYST, AND RECOVERING THE DESIRED 1.2-DITOLYETHANE.
Claim 2
Dependent Claim
78 words
A PROCESS FOR THE PREPARATION OF 1.2-DITOLYLETHANE WHICH COMPRISES CONDENSING TOLUENE WITH ETHYLENE CHLORHYDRIN, SAID TOLUENE BEING PRESENT IN A MOLAR EXCESS OVER SAID ETHYLENE CHLORHYDRIN, IN THE PRESENCE OF A MOLAR EXCESS OF PHOSPHORIC ACID CATALYST OVER SAID ETHYLENE CHLORHYDRIN AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 50* TO ABOUT 200*C., SEPARATING THE RESULTANT CONDENSATION PRODUCT, FURTHER CONDENSING SAID PRODUCT WITH TOLUENE IN THE PRESENCE OF A FRIEDEL-CRAFTS TYPE CATALYST, AND RECOVERING THE DESIRED 1.2-DITOLYETHANE.
Claim 3
Dependent Claim
77 words
A PROCESS FOR THE PREPARATION OF 1.2-DITOLYLETHANE WHICH COMPRISES CONDENSING TOLUENE WITH ETHYLENE CHLORHYDRIN, SAID TOLUENE BEING PRESENT IN A MOLAR EXCESS OVER SAID ETHYLENE CHLORHYDRIN, IN THE PRESENCE OF A MOLAR EXCESS OF A PHOSPHORIC ACID CATALYST OVER SAID ETHYLENE CHLORHYDRIN AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 105* TO ABOUT 115*C., SEPARATING THE RESULTANT CONDENSATION PRODUCT, FURTHER CONDENSING SAID PRODUCT WITH TOLUENE IN THE PRESENCE OF ALUMINUM CHLORIDE, AND RECOVERING THE DESIRED 1.2-DITOLYLETHANE.
Claim 4
Dependent Claim
77 words
A PROCESS FOR THE PREPARATION OF 1.2-DITOLYLETHANE WHICH COMPRISES CONDENSING TOLUENE WITH ETHYLENE CHLORHYDRIN, SAID TOLUENE BEING PRESENT IN A MOLAR EXCESS OVER SAID ETHYLENE CHLORHYDRIN, IN THE PRESENCE OF A MOLAR EXCESS OF A PHOSPHORIC ACID CATALYST OVER SAID ETHYLENE CHLORHYDRIN AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 105* TO ABOUT 115*C., SEPARATING THE RESULTANT CONDENSATION PRODUCT, FURTHER CONDENSING SAID PRODUCT WITH TOLUENE IN THE PRESENCE OF ALUMINUM CHLORIDE, AND RECOVERING THE DESIRED 1.2-DITOLYLETHANE.
References Cited (Backward Citations)
GB354992A
Cited
US2744150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |