US4091040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Procedure for making trimethylolmethane
Assignee: United States Department of the Navy
•
Filing: 1977-07-21
•
Granted: 1978-05-23
•
Expires: 1997-07-21
Abstract
Abstract A process for the production of trimethylolmethane in high yields. Trimetolmethane is useful as the essential precurser to trimethylolmethane trinitrate, a high-energy plasticizer and explosive.
Inventors
- 👤 Arnold T. Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:52
CPC Classifications
C; C07; C07C; C07C47/00; C07C47/02; C07C47/19; C07C29/00; C07C29/132; C07C29/136; C07C29/14; C07C29/141; C07C45/00; C07C45/51; C07C45/511; C07C45/515
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A method for producing trimethylolmethane comprising the steps of: a. reacting diethyl malonate with ethyl orthoformate in the presence of zinc chloride catalyst to produce ethyl ethoxymethylenemalonate; b. reacting ethyl ethoxymethylenemalonate with sodium ethoxide to produce diethyl diethoxymethylmalonate; c. reacting diethyl diethoxymethylmalonate with lithium aluminum hydride to produce 3,3-diethoxy-2-(hydroxymethyl)-1-propanol; and d. forming an aqueous solution of 3,3-diethoxy-2-(hydroxymethyl-1-propanol, adjusting the pH of said solution to 2.5 to produce 2-formyl-1,3-propanediol, and adding hydrogen and ruthenium-charcoal catalyst to produce trimethylolmethane.
Claim 2
Independent Claim
77 words
A method for producing trimethylolmethane comprising the steps of: a. reacting diethyl malonate with ethyl orthoformate in the presence of zinc chloride catalyst to produce ethyl ethoxymethylenemalonate; b. reacting ethyl ethoxymethylenemalonate with sodium ethoxide to produce diethyl diethoxymethylmalonate; c. reacting diethyl diethoxymethylmalonate with lithium aluminum hydride to produce 3,3-diethoxy-2-(hydroxymethyl)-1-propanol; and d. forming an aqueous solution of 3,3-diethoxy-2-(hydroxymethyl-1-propanol, adjusting the pH of said solution to 2.5 to produce 2-formyl-1,3-propanediol, and adding hydrogen and ruthenium-charcoal catalyst to produce trimethylolmethane.
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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |