US3849266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the electrolysis of alkali chloride solution
Assignee: Montedison SpA
•
Filing: 1973-08-02
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Granted: 1974-11-19
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Expires: 1993-08-02
Abstract
Abstract The anodic overvoltage and the decomposition of the amalgam during the electrolysis of alkaline chloride solutions in electrolytic cells are reduced by adding to the electrolyte small quantities of one or more compounds selected from the group consisting of the ethers of alcohols or phenols with polyoxyethylenes and of the esters of carboxylic acids with polyoxyethylenes.
Inventors
- 👤 G Cimarosti
- 👤 B Corradi
- 👤 V Petrillo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:14
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/36; C25B1/42; C25B1/44
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
117 words
IN A PROCESS FOR THE ELECTROLYSIS OF ALKALINE CHLORIDE SOLUTIONS IN MERCURY CATHODE CELLS AND DIAPHRAGM CELLS, THE IMPROVEMENT COMPRISING REDUCING THE ANODIC OVERVOLTAGE IN BOTH KINDS OF CELLS AND THE DECOMPOSITON OF THE AMALGAM IN MERCURY CATHODE CELL DURING THE ELECTROLYSIS BY ADDING TO THE ELECTROLYTE FROM 2 TO 200 PPM OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF, I. THE ETHERS OF ALCOHOLS WITH POLYOXYETHYLENES WHICH A. ARE DERIVED FROM ALCOHOLS SELECTED BETWEEN ALIPHATIC AND AROMATIC ONES AND HAVING FROM 8 TO 20 CARBON ATOMS, AND B. CONTAIN FROM 2 TO 150 MOLECULES OF ETHYLENE OXIDE FOR EACH MOLECULE OF ALCOHOL, II. THE ETHERS OF PHENOLS WITH POLYOXYETHYLENES. HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
117 words
IN A PROCESS FOR THE ELECTROLYSIS OF ALKALINE CHLORIDE SOLUTIONS IN MERCURY CATHODE CELLS AND DIAPHRAGM CELLS, THE IMPROVEMENT COMPRISING REDUCING THE ANODIC OVERVOLTAGE IN BOTH KINDS OF CELLS AND THE DECOMPOSITON OF THE AMALGAM IN MERCURY CATHODE CELL DURING THE ELECTROLYSIS BY ADDING TO THE ELECTROLYTE FROM 2 TO 200 PPM OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF, I. THE ETHERS OF ALCOHOLS WITH POLYOXYETHYLENES WHICH A. ARE DERIVED FROM ALCOHOLS SELECTED BETWEEN ALIPHATIC AND AROMATIC ONES AND HAVING FROM 8 TO 20 CARBON ATOMS, AND B. CONTAIN FROM 2 TO 150 MOLECULES OF ETHYLENE OXIDE FOR EACH MOLECULE OF ALCOHOL, II. THE ETHERS OF PHENOLS WITH POLYOXYETHYLENES. HAVING THE FOLLOWING FORMULA:
Claim 3
Dependent Claim
26 words
The process of claim 1, wherein the ethers of alcohols with polyoxyethylenes contain from 10 to 120 molecules of ethylene oxide for each molecule of alcohol.
Claim 4
Dependent Claim
23 words
The process of claim 2, wherein the ethers of alcohols with polyoxyethylenes are derived from alcohols having from 12 to 18 carbon atoms.
Claim 5
Dependent Claim
24 words
The process of claim 3, wherein the alcohol is selected from the group consisting of lauryl alcohol, oleyl alcohol, stearyl alcohol and phenylethyl alcohol.
Claim 6
Dependent Claim
31 words
The process of claim 1, wherein the R radical of the ethers of phenols with polyoxyethylenes contains from 8 to 20 carbon atoms and n is between 5 and 30, inclusive.
Claim 7
Dependent Claim
14 words
The process of claim 5, wherein R contains from 8 to 13 carbon atoms.
Claim 8
Dependent Claim
21 words
The process of claim 6, wherein R is selected from the group consisting of octyl, nonyl, dodecyl, tridecyl, cumyl and methylcumyl.
Claim 9
Dependent Claim
19 words
The process of claim 1, wherein the carboxylic acids are aliphatic acids having from 12 to 18 carbon atoms.
Claim 10
Dependent Claim
21 words
The process of claim 8, wherein the acid is selected from the groups consisting of lauric, oleic, stearic and palmitic acid.
Claim 11
Dependent Claim
27 words
The process of claim 1, wherein the aliphatic or aromatic alcohol and acid moieties contain one or more additional -OH, -Cl, -Br, -F, -SO4H, -SO4Me, -COOR and
Claim 12
Dependent Claim
35 words
The process of claim 1, wherein the R radical contains one or more -OH, -Cl, -F, -Br, -SO4H, -SO4Me groups in which Me is an alkali radical containing from one to four carbon atoms, and
Claim 13
Dependent Claim
17 words
The process of claim 1, wherein from 5 to 20 ppm by weight of additive is employed.
References Cited (Backward Citations)
US3630863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |