US4375394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic process for the preparation of ethylene glycol and glycerine
Assignee: Eastman Chemical Co
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Filing: 1982-03-11
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Granted: 1983-03-01
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Expires: 2002-03-11
Abstract
Abstract The present invention provides a process for the preparation of ethylene glycol and glycerine by a selective electrolysis that cleaves the carbon-carbon bonds of carbohydrate-derived polyols into two- and three-carbon units. The intermediate products can then be reduced to the desired ethylene glycol and glycerine products using standard reduction technology. The electrolysis is conducted in the presence of an electrolysis medium which contains manganese.
Inventors
- 👤 Thomas J. Devon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:04
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/01; C25B3/07
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
37 words
A process for the production of ethylene glycol and glycerine which comprises (a) electrolyzing a carbohydrate-derived polyol in the presence of an electrolysis medium comprising manganese, and (b) reducing the intermediate products to ethylene glycol and glycerine.
Claim 2
Dependent Claim
37 words
A process for the production of ethylene glycol and glycerine which comprises (a) electrolyzing a carbohydrate-derived polyol in the presence of an electrolysis medium comprising manganese, and (b) reducing the intermediate products to ethylene glycol and glycerine.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein said carbohydrate-derived polyol is selected from among sorbitol, mannitol, D-(-)-fructose, xylitol, erythritol, and mixtures thereof.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein said manganese is present in an amount of about 50 to 500 ppm.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein the pH of the electrolysis medium is about 1.5 to 9.
Claim 6
Dependent Claim
53 words
A process for the production of ethylene glycol and glycerine which comprises (a) electrolyzing a carbohydrate-derived polyol selected from among sorbitol, mannitol, D-(-)-frutose, xylitol, erythritol, and mixtures thereof in the presence of an electrolysis medium comprising about 50 to 500 ppm manganese, and (b) reducing the intermediate products to ethylene glycol and glycerine.
Claim 7
Dependent Claim
53 words
A process for the production of ethylene glycol and glycerine which comprises (a) electrolyzing a carbohydrate-derived polyol selected from among sorbitol, mannitol, D-(-)-frutose, xylitol, erythritol, and mixtures thereof in the presence of an electrolysis medium comprising about 50 to 500 ppm manganese, and (b) reducing the intermediate products to ethylene glycol and glycerine.
Claim 8
Dependent Claim
17 words
The process of claim 5 wherein the pH of the electrolysis medium is about 1.5 to 9.
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) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |