Title: Process for recovering high purity liquid ammonia from oil-refining waste water
Application Number: 95112128 Application Date: 1995.09.18
Publication Number: 1145877 Publication Date: 1997.03.26
Approval Pub. Date: Granted Pub. Date: 1999.04.28
International Classifi-cation: C01C1/10,C01C1/12
Applicant(s) Name: Zong Lihai Address: 250101
Inventor(s) Name: Tang Qinglin, Fan Yurun
Attorney & Agent: CUI MINHAI
Abstract:
     The recovering process includes steam stripping in single tower, proportional division of waste water, stripping temp regulation with cold and hot water flows to separate H2S from liquid ammonia, side exhausting of raw liquid ammonia, purification of liquid ammonia through three-stage segregation, low-temp crystallization and catalytic desulfurization. The liquid ammonia obtained has a purity of 99.7% and S content less than 0.02 ppm and the purified water has H2S and N contents less than 30 ppm and 80 ppm separately and may be reused.
Time: 8