Liquefaction achievable degree

The two-phase process stream goes to a receiver that also serves as a phase separator. The liquefied chlorine leaves through a bottom connection. The uncondensed gas, containing some of the chlorine along with the noncondensable impurities, goes overhead. A valve on the outlet line maintains the desired pressure on the gas in the liquefier and also serves to control the discharge pressure of the chlorine compressor. The combination of the pressure and temperature on the process side of the liquefier determines the extent to which the chlorine can condense (see Achievable Degree of Liquefaction, below). 

A. Achievable Degree of Liquefaction. The major complication in the liquefaction of chlorine is the presence of noncondensable gases. These arise in several different... 

This is a vital problem for liquefaction and has failed in the advanced German trials. In Japan, liquefaction has first to defeat incineration, the technique that has prevailed in most municipahties. The rate of incineration in municipalities has reached 80% or so and 40 million tons of garbage are incinerated every year. From this point of view, the reduction of collection and baling costs as described above is an easy way to achieve this. Second is the question of how to reduce the liquefaction cost compared with those for the other feedstock recycling methods, such as application in the iron and steel industry and gasification for ammonia synthesis. These methods have the merits discussed above. On the other hand, liquefaction has many weak points, it is small in scale, complicated with a mixed raw material for fine technology, and has a low degree of operation, 50% or so. 

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