US1880927A - Electrolytic production of sodium perchlorate - Google Patents
Electrolytic production of sodium perchlorate Download PDFInfo
- Publication number
- US1880927A US1880927A US491089A US49108930A US1880927A US 1880927 A US1880927 A US 1880927A US 491089 A US491089 A US 491089A US 49108930 A US49108930 A US 49108930A US 1880927 A US1880927 A US 1880927A
- Authority
- US
- United States
- Prior art keywords
- perchlorate
- grs
- sodium
- chlorate
- electrolytic production
- 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 - Lifetime
Links
- BAZAXWOYCMUHIX-UHFFFAOYSA-M sodium perchlorate Chemical compound [Na+].[O-]Cl(=O)(=O)=O BAZAXWOYCMUHIX-UHFFFAOYSA-M 0.000 title description 6
- 229910001488 sodium perchlorate Inorganic materials 0.000 title description 6
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 11
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 8
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 8
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 8
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 8
- 239000003792 electrolyte Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000005868 electrolysis reaction Methods 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- AXZAYXJCENRGIM-UHFFFAOYSA-J dipotassium;tetrabromoplatinum(2-) Chemical compound [K+].[K+].[Br-].[Br-].[Br-].[Br-].[Pt+2] AXZAYXJCENRGIM-UHFFFAOYSA-J 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 229910001487 potassium perchlorate Inorganic materials 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 1
- -1 salt chlorate Chemical class 0.000 description 1
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
- C25B1/28—Per-compounds
Definitions
- the present invention relates to improvements in the electrolytic production of sodium perchlorate.
- this is effected by continually replenishing the sodium chlorate contents of the bath, and preferably by maintaining a chlorate concentra tion, of say, not less than about 150 grs. per litre as long as the perchlorate content of the bath does not exceed about 1000 grs. per litre.
- Example 1 The electrolyte containing the usual quantity of bichromate of sodium (about 3-4 grs.
- NaClO per litre is subjected to electrolysis between platinum anodes and iron cathodes with a current density equal at both electrodesof 0.36 ampere per square centimetre at a temperature of about 43-45 C.
- the electrolyte is continually replenished with NaClO 250 grs. of this salt chlorate present in the bath, the current is shut off and the electrolyte Worked up into perchlorate of potassium in the manner known per se.
- the average current yield amounts to 95 percent, the energy yield being about 3.0 kwh. per kg.
- NaGlO The ozone content of the hydrogen developed in the course of electroylsis which in the processes hitherto employed amounted to about 1.5 grsper cb. metre, is, under the condi tions described, reduced to an average of 0.50
- sodium chlorate per litre at a temperature between about 40 and 50 0., introducing more sodium chlorate into said solution in a measure suflicient to maintain the concentration of the sodium chlorate in said solution at a point not far below saturation, with respect to said 7 salt, pending electrolysis, until the solution contains about 1000 grs. NaClO and 150 grs. NaClO per litre, and finally pursuing electrolysis of said solution, until the chlorate content of the electrolyte amounts to not more than about 1.5 percent of the perchlorate present.
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)
Description
Patented Oct. 4, 1932 UNITED STATESIPATENT oFFicaj 'UDO EHRHARDT, or BITTERFELD, GERMANY, assronon'ro I. G. FAIRBQENINDUSTRIIE AKTIENGESELLSCHAFT, or FRANKFORT-ON-THE-MAIN, GERMANY ELECTROLYTIC PRODUCTION OF SODIUM YERGHLORATE.
No Drawing. Application filed October 24, 1930, Serial No. 491,089, and in Germany October 1929.
The present invention relates to improvements in the electrolytic production of sodium perchlorate.
According to the known processes for the electrolytic production of sodium perchlorate it is necessary to practically exhaust the amount of sodium chlorate present in the electrolyte so as to be able to obtain a sufiiciently pure perchlorate and particularly a product yielding as little potassium chlorate as possible when the solution of perchlorate is subsequently converted into potassium perchlorate by means of potassium chloride. lVhen complying with this requirement, however, the wear the platinum anodes becomes excessive and in the final stages of the process, an enhanced formation of ozone takes place simultaneously. Moreover, the current and energy yield show a decided reduction in the course of the process.
I have now found that these disadvantages are practically avoided when carrying out the process in such a manner that the perchlorate concentration of the bath is 'maintained, during the greater part of the process,
at a higher level than hitherto usual.
According to the present invention, this is effected by continually replenishing the sodium chlorate contents of the bath, and preferably by maintaining a chlorate concentra tion, of say, not less than about 150 grs. per litre as long as the perchlorate content of the bath does not exceed about 1000 grs. per litre.
This manner of procedure is only possible by carrying out electrolysis at moderately elevated temperatures, say 4050 0., so as to increase the solubility of the chlorate in the electrolyte. Towards the termination of the electrolysis, the concentration may be raised up to 19.00 grs. per litre of sodium perchlorate. As the lye then contains comparatively small amounts of chlorate (below about 1.5 percent of the perchlorate contents), the addition of potassium chloride immediately yields a potassium perchlorate of entirely suflicient purity for technical purposes.
Example The electrolyte containing the usual quantity of bichromate of sodium (about 3-4 grs.
per litre) and having'a starting concentration of about 800 grs. NaClO per litre is subjected to electrolysis between platinum anodes and iron cathodes with a current density equal at both electrodesof 0.36 ampere per square centimetre at a temperature of about 43-45 C. The electrolyte is continually replenished with NaClO 250 grs. of this salt chlorate present in the bath, the current is shut off and the electrolyte Worked up into perchlorate of potassium in the manner known per se. The average current yield amounts to 95 percent, the energy yield being about 3.0 kwh. per kg. NaGlO The ozone content of the hydrogen developed in the course of electroylsis which in the processes hitherto employed amounted to about 1.5 grsper cb. metre, is, under the condi tions described, reduced to an average of 0.50
grs. per cb. metre. The wear of the platinum anodesis similarly reduced from 10-12 milligrs. per kg. of NaClO produced to 3 milligrs. per kg. NaClO I claim:
1. In the production of sodium perchlorate the steps which consist in electrolyzing a solution containing at the start at least 800 grs.
sodium chlorate per litre at a temperature between about 40 and 50 0., introducing more sodium chlorate into said solution in a measure suflicient to maintain the concentration of the sodium chlorate in said solution at a point not far below saturation, with respect to said 7 salt, pending electrolysis, until the solution contains about 1000 grs. NaClO and 150 grs. NaClO per litre, and finally pursuing electrolysis of said solution, until the chlorate content of the electrolyte amounts to not more than about 1.5 percent of the perchlorate present.
2. In the production of sodium perchlorate loo the steps which consist in electrolyzing a solution containing at the start at least 800 grs. sodium chlorate per litre, at a temperature between about 40 and 50 C., continuously in- 5 troducing more sodium chlorate into said solution in a measure suflicient to maintain the concentration of the sodium chlorate in said solution at a point not far below saturation, with respect to said salt, pending electr oylsis, until the solution contains about 1000 grs. NaClO and 150 grs. NaClO per litre, and finally pursuing electrolysis of said solution, until the chlorate content of the electrolyte amounts to not more than about 1.5
per cent of the perchlorate present.
In testimony whereof, I aflix m signature.
UDO EHR DT.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1880927X | 1929-10-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1880927A true US1880927A (en) | 1932-10-04 |
Family
ID=7747405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US491089A Expired - Lifetime US1880927A (en) | 1929-10-29 | 1930-10-24 | Electrolytic production of sodium perchlorate |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1880927A (en) |
| FR (1) | FR704324A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2512973A (en) * | 1945-10-31 | 1950-06-27 | Western Electrochemical Compan | Process for making perchlorates |
| US2840519A (en) * | 1957-05-06 | 1958-06-24 | American Potash & Chem Corp | Peroxidation process |
-
1930
- 1930-10-24 FR FR704324D patent/FR704324A/en not_active Expired
- 1930-10-24 US US491089A patent/US1880927A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2512973A (en) * | 1945-10-31 | 1950-06-27 | Western Electrochemical Compan | Process for making perchlorates |
| US2840519A (en) * | 1957-05-06 | 1958-06-24 | American Potash & Chem Corp | Peroxidation process |
Also Published As
| Publication number | Publication date |
|---|---|
| FR704324A (en) | 1931-05-18 |
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