EP0004903B1 - Verfahren zur Herstellung von Chlor aus Salzsäure durch Elektrolyse und Salzsäure-Elektrolysezelle - Google Patents
Verfahren zur Herstellung von Chlor aus Salzsäure durch Elektrolyse und Salzsäure-Elektrolysezelle Download PDFInfo
- Publication number
- EP0004903B1 EP0004903B1 EP79101017A EP79101017A EP0004903B1 EP 0004903 B1 EP0004903 B1 EP 0004903B1 EP 79101017 A EP79101017 A EP 79101017A EP 79101017 A EP79101017 A EP 79101017A EP 0004903 B1 EP0004903 B1 EP 0004903B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrolysis
- hydrochloric acid
- electrolytes
- electrodes
- level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/24—Halogens or compounds thereof
- C25B1/26—Chlorine; Compounds thereof
Definitions
- the electrolytic generation of hydrogen and chlorine from hydrochloric acid generally takes place in electrolytic cells in which 30 to 45 vertically arranged bipolar electrodes are combined, the electroylsem chamber formed between two electrodes being subdivided by a diaphragm.
- the electrode area is usually approximately 2.5 m 2 and has a square cross section; see for example DAS 1 216 852 or Chem. lng.technik 39, 731 (1967).
- the hydrochloric acid flows through the electrolysis chamber from bottom to top, hydrogen forming in the catholyte space and chlorine in the anolyte space.
- the catholyte and anolyte are thus enriched with gas bubbles on their way through the electrolysis chamber. The gas bubbles are separated after the electrolytes have left the cell.
- the presence of gas bubbles in the electrolyte increases its electrical resistance and thus the specific power consumption of the electrolytic cell. It is therefore desirable, given the current density, to determine the residence time of the electrolyte in the cell, i.e. choose the time during which the gas bubbles accumulate as short as possible. On the other hand, for the cell to operate economically, it is necessary to sufficiently reduce the concentration of hydrochloric acid while passing through the electrolytic cell. Depletion from about 25% to about 20% HCI is usually aimed for.
- the invention therefore relates to a process for the production of chlorine and hydrogen from hydrochloric acid by electrolysis in an electrolysis cell, consisting of a multiplicity of vertically arranged bipolar electrodes, with an electrode space and an catholyte space being divided between two electrodes for dividing the electrolysis chambers formed between them Diaphragm is arranged, further drain and inflow devices for the electrolytes, which is characterized in that the hydrochloric acid is electrolyzed in at least two successive stages, being degassed after leaving one stage and before entering the next stage.
- the invention also relates to a hydrochloric acid electrolysis cell, consisting of a multiplicity of vertically arranged bipolar electrodes, a diaphragm being arranged between two electrodes for dividing the electrolysis chamber formed between them into an anolyte space and a catholyte space, furthermore drainage and inflow devices for the Electrolytes, which is characterized in that the bipolar electrodes and the electrolysis chambers are each divided into floors in at least one horizontal plane perpendicular to the electrode surface and additional inflow and outflow devices are provided for the electrolytes in this plane, so that electrolyte circuits are independent of one another on each floor are trained.
- the height of the partial electrode surfaces resulting from the subdivision of the electrodes is preferably 40 to 80 cm, particularly preferably approximately 60 cm.
- the bipolar electrodes are expediently each held in holding frames which are stacked together in the manner of filter presses.
- the principle of such arrangements is e.g. in DOS 2 222 637 or DOS 2 317 359.
- the electrolysis frames for receiving the electrodes contain a plurality of windows lying one above the other, the webs containing inflow and outflow channels for the electrolytes.
- the electrolysis is preferably carried out at current densities of 4 to 8 kA / m 2 . preferably operated 5 to 7 kA / m 2 .
- the different levels of an electrolysis cell are preferably connected in parallel.
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2816152 | 1978-04-14 | ||
DE2816152A DE2816152C2 (de) | 1978-04-14 | 1978-04-14 | Verfahren zur Herstellung von Chlor aus Salzsäure durch Elektrolyse und Salzsäure-Elektrolysezelle |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0004903A2 EP0004903A2 (de) | 1979-10-31 |
EP0004903A3 EP0004903A3 (en) | 1979-11-14 |
EP0004903B1 true EP0004903B1 (de) | 1980-12-10 |
Family
ID=6036937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP79101017A Expired EP0004903B1 (de) | 1978-04-14 | 1979-04-04 | Verfahren zur Herstellung von Chlor aus Salzsäure durch Elektrolyse und Salzsäure-Elektrolysezelle |
Country Status (5)
Country | Link |
---|---|
US (1) | US4236983A (es) |
EP (1) | EP0004903B1 (es) |
JP (1) | JPS54137496A (es) |
DE (2) | DE2816152C2 (es) |
ES (1) | ES479479A1 (es) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6039757B2 (ja) * | 1979-02-02 | 1985-09-07 | クロリンエンジニアズ株式会社 | 塩酸の電解方法 |
DE2908269C2 (de) * | 1979-03-02 | 1984-04-26 | Uhde Gmbh, 4600 Dortmund | Salzsäure-Elektrolysezelle |
IN156372B (es) * | 1980-05-15 | 1985-07-06 | Ici Plc | |
DE3041897A1 (de) * | 1980-11-06 | 1982-06-09 | Bayer Ag, 5090 Leverkusen | Salzsaeure-elektrolysezelle zur herstellung von chlor und wasserstoff |
US4402809A (en) * | 1981-09-03 | 1983-09-06 | Ppg Industries, Inc. | Bipolar electrolyzer |
US5501986A (en) * | 1988-04-06 | 1996-03-26 | E. I. Du Pont De Nemours And Company | Piezoelectric specific binding assay with mass amplified reagents |
US4999284A (en) * | 1988-04-06 | 1991-03-12 | E. I. Du Pont De Nemours And Company | Enzymatically amplified piezoelectric specific binding assay |
US5348579A (en) * | 1993-08-11 | 1994-09-20 | Silberline Manufacturing Co., Inc. | Water resistant metal pigment-containing paste and method for making |
DE19956787A1 (de) * | 1999-11-25 | 2001-05-31 | Bayer Ag | Elektrolyseplatte |
ITMI20012003A1 (it) * | 2001-09-27 | 2003-03-27 | De Nora Elettrodi Spa | Cella a diaframma per la produzione cloro-soda di aumentata superficie elettrodica e metodo per realizzarla |
CN100557085C (zh) * | 2007-06-28 | 2009-11-04 | 马来西亚大光蓄电池有限公司 | 无导线连接的串联式电解槽 |
CN112759036A (zh) * | 2020-12-28 | 2021-05-07 | 云南驰宏国际锗业有限公司 | 电解法处理盐酸废水的方法及用于盐酸废水电解的电解池 |
WO2024126607A1 (en) | 2022-12-14 | 2024-06-20 | Basf Se | Process for preparing at least one polyisocyanate from co2 |
EP4403589A1 (en) | 2023-01-19 | 2024-07-24 | Basf Se | A process for preparing at least one polyisocyanate from solid material w |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA743083A (en) * | 1966-09-20 | S. Kircher Morton | Electrolytic cell | |
FR358245A (fr) * | 1905-10-03 | 1906-02-02 | Eugene Francois Cote | Mode de fabrication du chlore par électrolyse de l'acide chlorhydrique |
US1485461A (en) * | 1922-07-13 | 1924-03-04 | Knowles Albert Edgar | Electrolytic cell |
US2719822A (en) * | 1952-01-10 | 1955-10-04 | Universal Oil Prod Co | Production of chlorine from hydrogen chloride |
US3236760A (en) * | 1959-11-09 | 1966-02-22 | Oronzio De Nora Impianti | Cells for the production of chlorine from hydrochloric acid |
DE2162487A1 (de) * | 1971-12-16 | 1973-06-28 | Dow Chemical Co | Verfahren zur herstellung von chlor durch elektrolyse von chlorwasserstoff und polyvalenten metallchloriden |
DE2222637A1 (de) * | 1972-05-09 | 1973-11-29 | Bayer Ag | Halterahmen fuer elektroden von elektrolysevorrichtungen |
DD112907A5 (es) * | 1973-04-06 | 1975-05-12 | ||
US3876517A (en) * | 1973-07-20 | 1975-04-08 | Ppg Industries Inc | Reduction of crevice corrosion in bipolar chlorine diaphragm cells by locating the cathode screen at the crevice and maintaining the titanium within the crevice anodic |
-
1978
- 1978-04-14 DE DE2816152A patent/DE2816152C2/de not_active Expired
-
1979
- 1979-03-28 US US06/024,748 patent/US4236983A/en not_active Expired - Lifetime
- 1979-04-04 EP EP79101017A patent/EP0004903B1/de not_active Expired
- 1979-04-04 DE DE7979101017T patent/DE2960061D1/de not_active Expired
- 1979-04-10 ES ES479479A patent/ES479479A1/es not_active Expired
- 1979-04-12 JP JP4369579A patent/JPS54137496A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
US4236983A (en) | 1980-12-02 |
DE2816152C2 (de) | 1980-07-03 |
ES479479A1 (es) | 1979-07-16 |
JPS54137496A (en) | 1979-10-25 |
EP0004903A3 (en) | 1979-11-14 |
DE2816152B1 (de) | 1979-10-18 |
EP0004903A2 (de) | 1979-10-31 |
DE2960061D1 (en) | 1981-02-19 |
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