DE489076C - Process for adsorbing low-boiling gases - Google Patents

Description

Process for adsorbing low-boiling gases is the subject of Invention is a method for adsorbing low-boiling waste gases by means of Gels in the preparation of compressed gases from their liquid state, wherein the gel to the boiling point with the help of the amount of cold released during the useful gasification of the gas to be adsorbed or to a temperature level close to it is cooled. The waste gases are removed by heating the cooled gel container with constant or with significantly higher pressure in other containers or directed to the immediate place of consumption.

The use of charcoal for adsorption is known in refrigeration technology of gases, for example air, in the vacuum space of the transport vessels for liquids Gases have remained. Charcoal, on the other hand, is a flammable substance that can easily oxidizes and thus gives rise to dangerous conditions. In addition, the adsorptive capacity the carbon compared to that of the active silica gels is extremely low. Even it was found that the adsorptive capacity of the gels with decreasing temperature, from 0 ° C onwards, it grows considerably.

In addition, silica gel is incombustible and can be higher when used Temperatures are annealed. But above all, with one it is the burning very conveying substance, e.g. B. oxygen gas, in direct or indirect contact brought, completely indifferent and harmless and switches the when using of charcoal and the like.

The experiments also showed that, for example, silica gel at a temperature of -183 ° C., the boiling point of oxygen, has an adsorption capacity that is over 50 percent higher than the same amount of charcoal.

If you want compressed gases by evaporation of liquefied gases in pressure vessels prepare and use, it is known that considerable amounts of cold are generated during gasification free, which you can directly or indirectly on gels that are housed in pressure vessels are, can be transferred. It can then be used in the break in operation when compressed gases are not more are needed, which are necessarily produced by natural gasification small amounts of gas under the effect of the previous strong cooling of the Gels hold in this so that by the inevitable gasification of the liquid a significant pressure increase does not occur in the storage vessel. At about again Occurring consumption period you are able to by heating the cooled Gel container these waste gases at constant or even at significant higher Transfer prints to other containers or use them directly.

The gel then literally takes on the effect of a pump without a moving one Parts such as pistons and valves.

Such processes with charcoal or similar adsorbents is prohibited because of the extremely high risk of explosion associated with it, expected in the presence of air or oxygen.

Claims (2)

PATENT CLAIMS: i. A method for adsorbing low-boiling gases by means of gels in the preparation of compressed gases from their liquid state of aggregation, characterized in that the gas which unintentionally evaporates from the liquid during breaks in operation is brought into contact with gel stored in pressure vessels, which has previously reached the boiling point of the adsorbing gas or has been cooled to a temperature level close to it and from which afterwards in a recurring consumption period by heating the waste gases are expelled at constant or even at significantly higher pressures. 2. The method according to claim i, characterized in that during the consumption period the useful evaporation the evaporation cold produced by the liquefied gas is transferred to the gel.