| 摘要 |
<p>PURPOSE:To obtain chlorine with high yield and high purity by compressing and cooling mixed gas containing chlorine of a specified concentration to produce condensate, by removing the condensate to the outside of the system and by making the residual gas adsorbed in an adsorber. CONSTITUTION:After mixed gas 1 of 10 to 60vol.% chlorine concentration is pressurized by a compressor 3 and cooled in a cooling condenser 5 to about -24 deg.C, it is fed to a separator 7, causing liquid chlorine (condensate) 8 of about 97.6vol.% purity and noncondensable gas 9 to be obtained from the bottom and the top of the separator 7 respectively. Then, the gas 9 is first supplied to 13a, from among adsorbers 13a to 13c packed with synthetic Y type zeolite, to obtain gas 14 containing chlorine of about <=100ppm from the top of the 13a. Then, the gas 9 is supplied to the 13b to which the adsorption has been changed over from the 13a and the adsorber 13a is evacuated by a vacuum pump 11 to obtain gas 12 of about 81.0vol.% chlorine concentration. Thus the adsorption operation is continuously performed in the order of 13a, 13b, 13c to obtain the gases 12 and 14, and simultaneously the gas 12 is mixed with the gas 1 and again compressed and cooled to industrially separate and recover chlorine.</p> |
