GB349692A - Method of obtaining potassium and/or sodium ferro-cyanide in the purification of coal gas - Google Patents
Method of obtaining potassium and/or sodium ferro-cyanide in the purification of coal gasInfo
- Publication number
- GB349692A GB349692A GB929230A GB929230A GB349692A GB 349692 A GB349692 A GB 349692A GB 929230 A GB929230 A GB 929230A GB 929230 A GB929230 A GB 929230A GB 349692 A GB349692 A GB 349692A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkali
- coal gas
- carbonate
- purification
- class
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/10—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
- C10K1/12—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors
- C10K1/124—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors containing metal compounds other than alkali- or earth-alkali carbonates, hydroxides- or oxides- or salts of inorganic acids derived from sulfur
- C10K1/125—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors containing metal compounds other than alkali- or earth-alkali carbonates, hydroxides- or oxides- or salts of inorganic acids derived from sulfur containing Fe compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Industrial Gases (AREA)
Abstract
Water soluble potassium and/or sodium ferrocyanides are obtained free from insoluble cyanides in the purification of coal gas from hydrocyanic acid by washing the gas with a suspension of divalent iron compounds in an excess of alkali lye, such as alkali hydroxide or carbonate, the coal gas freed from tar and ammonia but containing carbon dioxide and hydrocyanic acid being washed according to the counter current principle and the excess alkali which is converted into carbonate or bicarbonate being used again in making up fresh wash liquor. The divalent iron compounds may be obtained by the reaction of ferrous sulphate or chloride with milk of lime, soda, or ammonia preferably at a temperature of 80-90 DEG C. The spent liquor is filtered hot and concentrated for the crystallization of the ferrocyanides, any bicarbonate present being decomposed with the evolution of carbon dioxide; any thiocyanic acid or sulphuretted hydrogen present is also driven off in the concentration. The mother liquor from the crystallization consisting principally of alkali carbonate is returned to the process. Specifications 10876/02, 26566/02, [both in Class 1, Acids, alkalies, &c.], 109,254 and 181,719, [both in Class 1 (ii), Inorganic compounds, other than &c.], are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB929230A GB349692A (en) | 1930-03-24 | 1930-03-24 | Method of obtaining potassium and/or sodium ferro-cyanide in the purification of coal gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB929230A GB349692A (en) | 1930-03-24 | 1930-03-24 | Method of obtaining potassium and/or sodium ferro-cyanide in the purification of coal gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB349692A true GB349692A (en) | 1931-06-04 |
Family
ID=9869160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB929230A Expired GB349692A (en) | 1930-03-24 | 1930-03-24 | Method of obtaining potassium and/or sodium ferro-cyanide in the purification of coal gas |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB349692A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2772304A (en) * | 1952-12-11 | 1956-11-27 | Montedison Spa | Process for purifying acrylonitrile formed by synthesis from acetylene and hydrogen cyanide |
| US2788259A (en) * | 1955-03-15 | 1957-04-09 | Imp Paper And Color Corp | Process for production of alkali ferrocyanides and ammonium sulfate |
-
1930
- 1930-03-24 GB GB929230A patent/GB349692A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2772304A (en) * | 1952-12-11 | 1956-11-27 | Montedison Spa | Process for purifying acrylonitrile formed by synthesis from acetylene and hydrogen cyanide |
| US2788259A (en) * | 1955-03-15 | 1957-04-09 | Imp Paper And Color Corp | Process for production of alkali ferrocyanides and ammonium sulfate |
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