Patent US4336408A successfully refreshed from Google Patents.
US4336408A
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2-Hydroxymethyl-1,3-propanediol preparation
Assignee: ATK Launch Systems LLC
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Filing: 1979-06-26
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Granted: 1982-06-22
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Expires: 1999-06-26
Abstract
Abstract 2-Hydroxymethyl-1,3-propanediol trinitrate, processes for its preparation, and compounds related thereto are disclosed. The final product is useful as a plasticizer of relatively low volatility in double based propellant compositions and as a liquid explosive.
Inventors
- 👤 Michael W. Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:24
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/14; C07C29/141; C06; C06B; C06B25/00; C06B25/10; C06B25/18; C06B25/24; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B49/00; C07C29/09; C07C29/10; C07C29/103; C07C29/147; C12; C12C; C12C11/00; C12C11/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
39 words
A process for the preparation of 2-hydroxymethyl-1, 3-propanediol which comprises the treatment of bis-(hydroxymethyl) acetaldehyde with an aldehyde carbonyl group reducing agent selected from hydrogen adsorbed on a hydrogenation catalyst or an alkali metal dissolving in a lower alkanol.
Claim 2
Dependent Claim
39 words
A process for the preparation of 2-hydroxymethyl-1, 3-propanediol which comprises the treatment of bis-(hydroxymethyl) acetaldehyde with an aldehyde carbonyl group reducing agent selected from hydrogen adsorbed on a hydrogenation catalyst or an alkali metal dissolving in a lower alkanol.
Claim 3
Dependent Claim
41 words
A process for the preparation of 2-hydroxymethyl-1,3-propanediol which comprises the treatment of bis-(hydroxymethyl)acetaldehyde with an aldehyde carbonyl group reducing agent selected from hydrogen adsorbed on a platinum, rhodium or palladium hydrogenation catalyst, or an alkali metal dissolving in a lower alkanol.
Claim 4
Dependent Claim
41 words
A process for the preparation of 2-hydroxymethyl-1,3-propanediol which comprises the treatment of bis-(hydroxymethyl)acetaldehyde with an aldehyde carbonyl group reducing agent selected from hydrogen adsorbed on a platinum, rhodium or palladium hydrogenation catalyst, or an alkali metal dissolving in a lower alkanol.
Claim 5
Dependent Claim
22 words
A process as defined in claim 2, wherein the aldehyde carbonyl group reducing agent is hydrogen adsorbed on a platinum hydrogenation catalyst.
Claim 6
Dependent Claim
22 words
A process as defined in claim 2 wherein the aldehyde carbonyl group reducing agent is hydrogen adsorbed on a rhodium hydrogenation catalyst.
Claim 7
Dependent Claim
22 words
A process as defined in claim 2 wherein the aldehyde carbonyl group reducing agent is hydrogen adsorbed on a palladium hydrogenation catalyst.
Claim 8
Dependent Claim
21 words
A process as defined in claim 2 wherein said alkali metal dissolving in a lower alkanol is sodium dissolving in ethanol.
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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) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |