Chlorine, compression systems

A. Characteristics of Sulfuric Acid. Besides its use in drying, sulfuric acid is the seal liquid for rotary compressors in evacuation systems and small-scale chlorine compression units (Section 9.1.6.2C). To be effective as a desiccant, it should have a concentration of at least 93% and preferably 96%. When higher strengths are used, the... 

A. Suction Chillers. The ignition temperature of dry chlorine in contact with mild steel is about 250°C. A compression system is usually designed for bulk gas temperatures... 

The first seven considerations account for the long dominance of chlorofluoro-carbons (CFCs) in chlorine liquefaction systems. These refrigerants are outstanding in the first four points listed. The fourth is especially important in our particular case. Accidental mixing of chlorine and the refrigerant should not create a hazard. Also, generally CFCs have low specific heat ratios. This property equates to low eneigy consumption in compression (point 5). 

Gaskets in both dry gas and Hquid chlorine systems are made of mbberi2ed compressed asbestos. Eor wet chlorine gas, mbber or synthetic elastomers are acceptable. PTEE is resistant to both wet and dry chlorine gas and to Hquid chlorine up to 200°C. Tantalum, HasteUoy C, PTEE, PVDE, Monel, and nickel are recommended for membranes, mpture disks, and beUows. 

Aerothene [Dow]. TM for a group of chlorinated solvents used as vapor pressure depressants, or with compressed gases to replace fluorocarbon propellant systems. 

FIGURE 6.5 The infrared spectrum of a query compound compressed by Hadamard transform for the prediction of benzene derivatives by a CPG neural networks. The spectrum exhibits some typical bands for aromatic systems and chlorine atoms. 

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