Apparatus for the small-scale manufacture of chlorine and sodium hydroxide or sodium hypochlorite
US4308123A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1979 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Nov 30, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B15/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Presented is an apparatus and method for producing small quantities of chlorine and sodium hydroxide or sodium hypochlorite, useful in many applications where the major investment of a full-blown chemical plant capable of producing tons of product per day is not economically feasible. The apparatus of the invention includes the use of an electrolytic cell embodying an anode chamber charged with an acidic, concentrated sodium chloride solution and a cathode chamber charged with a basic aqueous solution and through which an electric current may be passed under controlled conditions to initiate and maintain a reaction that produces chlorine gas in the anode chamber and hydrogen gas and a solution of sodium hydroxide in the cathode chamber. The anode and cathode chambers are separated by a chemically-resistant ion-exchange membrane permeable only to positively charged ions. Anolyte and catholyte feed tanks are arranged in association with appropriate anolyte and catholyte surge tanks connected to the electrolytic cell in such a way that the reaction proceeds continuously without the need for mechanical pumps. The chlorine and the sodium hydroxide solution may leave the apparatus as sep…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.