- BrandДвуокись углерода жидкая
- Country of manufactureUzbekistan
- Двуокись углерода жидкаяЖидкая углекислота используется в качестве хладагента и рабочего тела в теплоэнергетических установках (в холодильниках, морозильниках, солнечных электрогенераторах и т.д.).
| Carbon dioxide is used in various direction:
1) Preservative is also designated on packing under the E290 code; 2) As a baking powder; |
3) In production of carbonated drinks;
4) An artificial ice, for cooling, freezing and storage of foodstuff at direct and indirect contact with them;
5) For drying of casting molds;
| 6) Cylinders with liquid carbonic acid are widely applied as fire extinguishers
7) As the protective environment when welding by a wire; 8) In barrels it is applied in the pneumatic weapon (in gas-balloon pneumatics); 9) As a power source for engines in aviamodelling. |
Carbon dioxide is used as the protective environment when welding by a wire, but at high temperatures there is its dissociation to release of oxygen. The emitted oxygen oxidizes metal. In this regard it is necessary to enter into a welding wire deoxidants, such as manganese and silicon. Other consequence of influence of the oxygen which is also connected with oxidation is sharp decrease in a superficial tension that leads, among other things, to more intensive spraying of metal, than when welding in argon or Gely.
Liquid carbonic acid is used as coolant and a working body in heat power installations (in refrigerators, deep freezes, solar electric generators, etc.).
Gaseous carbon dioxide is delivered on the pipeline. Under the gulf of carbon dioxide liquid steel cylinders, tanks are used.
|
Appearance |
|||
|
Flavourless colourless liquid |
|||
|
Main physical and chemical properties |
|||
|
№ |
Name |
Indicator |
|
|
1. |
Chemical formula |
CO2 |
|
|
2. |
Molecular weight |
44,01 |
|
|
3. |
Appearance |
Flavourless colourless liquid |
|
|
4. |
Critical temperature |
31,1 °C |
|
|
5. |
Critical pressure |
7,4 MPas |
|
|
6. |
Temperature of boiling (sublimation) with an atmospheric pressure |
minus 78,5 °C |
|
|
Technical characteristics |
|||
|
№ |
Name |
Norm | |
|
Premium |
Premium |
||
|
1. |
Volume fraction of carbon dioxide (CO2), %, not less |
99,8 |
99,5 |
|
2. |
Volume fraction of carbon monoxide (WITH) |
passes test | |
|
3. |
Mass concentration of mineral oils of mechanical impurity, mg/kg, no more |
0,1 |
0,1 |
|
4. |
Hydrogen sulfide availability |
passes test | |
|
5. |
Availability of hydrochloric acid |
passes test | |
|
6. |
Availability of sulphurous and nitrogenous acids and organic compounds (alcohols, air, aldehydes and organic acids) |
passes test | |
|
7. |
Availability of ammonia and ethanolamines |
passes test | |
|
8. |
Existence of a smell and taste |
passes test | |
|
9. |
Mass fraction of water, % no more |
passes test | |
|
10. |
Mass concentration of water vapor at a temperature of 20 °C and pressure of 101,3 KPA (760 mm Hg), g/cm3, no more, that corresponds to carbon dioxide saturation temperature water vapor with a pressure of 101,3 kPa (760 mm.rt.st) and temperature, °C, not above |
0,037 minus 48 |
0,184 minus 34 |
|
11. |
Availability of aromatic hydrocarbons |
passes test |
