SU454177A1 - The method of purification of waste gases from the production of chromic anhydride - Google Patents
The method of purification of waste gases from the production of chromic anhydrideInfo
- Publication number
- SU454177A1 SU454177A1 SU1816868A SU1816868A SU454177A1 SU 454177 A1 SU454177 A1 SU 454177A1 SU 1816868 A SU1816868 A SU 1816868A SU 1816868 A SU1816868 A SU 1816868A SU 454177 A1 SU454177 A1 SU 454177A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- purification
- production
- waste gases
- chromic anhydride
- soda
- Prior art date
Links
Landscapes
- Treating Waste Gases (AREA)
Description
1one
Изобретение относитс к области очистки отход щих газов химических производств и может быть применено дл очистки отход щих газов производства хромового ангидрида от хлористого хромила, хромового ангидрида, хлористого водорода и хлора.The invention relates to the field of cleaning waste gases of chemical plants and can be used to clean the waste gases of the production of chromic anhydride from chromyl chloride, chromic anhydride, hydrogen chloride and chlorine.
Известен способ очистки отход щих газов производства хромового ангидрида контактированием с водно-щелочпым раствором кальпинировапной соды.A known method of cleaning waste gases from the production of chromic anhydride by contacting with an aqueous alkaline solution of calcinic soda.
Согласно этому способу отработанный раствор соды сбрасывают обычно в шламовый пруд, что приводит к потере составл ющих ОТХОДЯП1ИХ газов. Однако при осуществле ши такого способа очистки процесс усложн етс , так как необходимо иметь узел приготовлени раствора соды и емкость дл хранени соды и сбросных растворов.According to this method, the spent soda solution is usually discharged into a sludge pond, which results in the loss of components of the WASTE gas. However, when such a purification process is carried out, the process is complicated, since it is necessary to have a soda solution preparation unit and a storage tank for soda and waste solutions.
Предложенный способ отличаетс тем, что очистку ведут хроматными растворами с рН 5-10, которые после контактировани с отход щими газами направл ют в производство бихромата натри либо непосредственно, либо после «гор чей бисульфатной травки. Такой способ очистки позвол ет утилизировать составл ющие отход щих газов (СгОоСЬ,The proposed method is characterized in that the purification is carried out with chromate solutions with a pH of 5-10, which, after contact with the waste gases, are sent to the production of sodium bichromate either directly or after "hot bisulfate weed." This purification method allows to dispose of the components of the waste gases (CrOOS,
CrOaClo, НС1) и упростить процесс за счет исключени содовой очистки.CrOaClo, HC1) and simplify the process by eliminating soda cleaning.
Пример. 15 м раствора хромата натри с рН 9,5 и температурой 40°С, содержащего 4131 кг Na2Cr04, подают на орошение скруббера , через который пропускают отход щие из реактора газы с температурой 300°С в течение 1,5 час со скоростью 18 . В указанном количестве газа содерл итс 2,36 кг НС1, 9,96 кг CrOjCb, 13,8 кг хлора в виде СЬ и 3,2 кг СгО,,Example. A 15 m sodium chromate solution with a pH of 9.5 and a temperature of 40 ° C, containing 4131 kg of Na2Cr04, is fed to the scrubber irrigation through which the gases leaving the reactor with a temperature of 300 ° C are fed for 1.5 hours at a rate of 18. The specified amount of gas contained 2.36 kg of HC1, 9.96 kg of CrOjCb, 13.8 kg of chlorine in the form of Cb and 3.2 kg of CrO,
После орошени получают 14,5 м раствора с рН 8,1, температурой 70°С и концентрацией СгОз 179 г/л.After irrigation, 14.5 m solution is obtained with a pH of 8.1, a temperature of 70 ° C and a CgOz concentration of 179 g / l.
В очищенном газе указанные примеси не обнаружены.These impurities are not detected in the purified gas.
Предмет изобретени Subject invention
Способ очистки отход щих газов производства хромового ангидрида контактированием с водными солевыми растворами, отличающийс тем, что, с целью утилизации примесей и упрощени процесса, очистку осуществл ют хроматными растворами при рН среды , равном 5-10.The method of purification of waste gases from the production of chromic anhydride by contacting with aqueous salt solutions, characterized in that, in order to utilize impurities and simplify the process, purification is carried out with chromate solutions at a pH of 5-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1816868A SU454177A1 (en) | 1972-07-28 | 1972-07-28 | The method of purification of waste gases from the production of chromic anhydride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1816868A SU454177A1 (en) | 1972-07-28 | 1972-07-28 | The method of purification of waste gases from the production of chromic anhydride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU454177A1 true SU454177A1 (en) | 1974-12-25 |
Family
ID=20523792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1816868A SU454177A1 (en) | 1972-07-28 | 1972-07-28 | The method of purification of waste gases from the production of chromic anhydride |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU454177A1 (en) |
-
1972
- 1972-07-28 SU SU1816868A patent/SU454177A1/en active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102282106B (en) | Utilisation of desalination waste | |
| SU454177A1 (en) | The method of purification of waste gases from the production of chromic anhydride | |
| CZ284411B6 (en) | Process for preparing industrial aqueous solution of sodium chloride | |
| US1500126A (en) | Process of purifying brine for electrolysis | |
| US3203894A (en) | Method for the conversion of sea water into fresh water | |
| JPS5698487A (en) | Purification method of potassium chloride brine | |
| SU697160A1 (en) | Method of purifying abgases | |
| FR2446531A1 (en) | PROCESS AND PLANT FOR TREATING RADIOACTIVE FILTRATES | |
| SU1713627A1 (en) | Method of scrubbing gas of phenol and formaldehyde | |
| SU791630A1 (en) | Method of waste water purification | |
| SU552298A1 (en) | The method of obtaining chromic anhydride | |
| SU128466A1 (en) | Wastewater treatment method for producing tetraethyl lead | |
| SU1148557A3 (en) | Method of reprocessing residual gas of cyanurchloride production | |
| RU1782639C (en) | Method refining exhaust gas of sulfur dioxide | |
| SU922080A1 (en) | Process for purifying effluents from organic impurities | |
| SU697403A1 (en) | Method of purifying spent zinc-containing nitric acid solution | |
| SU459432A1 (en) | Calcium hypochlorite decomposition catalyst | |
| SU146249A1 (en) | Electrionitic method of purification of sodium fluorosilicate wastewater | |
| JPS5940763B2 (en) | Concentration method of ammonia aqueous solution using reverse osmosis method | |
| SU812752A1 (en) | Method of waste water purification from chromium | |
| SU583979A1 (en) | Method of purifying solutions and waste water from sexivalent chromium | |
| SU633572A1 (en) | Method of purifying gases from hydrogen sulfide | |
| JPS5831393B2 (en) | Enka Alkali Youekino Denkai Hohou | |
| SU431099A1 (en) | METHOD OF OBTAINING SODIUM CHLORATE | |
| SU495074A1 (en) | The method of cleaning exhaust gases from acidic components |