Process for absorption of sulfur compounds from fluids using certain piperidines, piperazines, or anhydrides of monocarboxylic amino acids
申请人:THE DOW CHEMICAL COMPANY
公开号:EP0471592A2
公开(公告)日:1992-02-19
Sulfur dioxide is removed from a fluid containing SO2 by employing as an absorbent for the SO2 an aqueous solution of a compound represented by Formulae I, II or III :
wherein each Y is independently -(CR22)- or -(CR2)= ; each R1, R2, R5 or R6 is independently hydrogen, an alkyl group ; an hydroxyalkyl group ; an aldehyde group ; a carboxylic acid group or salt thereof ; or an alkyl group containing at least one carboxylic acid ester, a carboxylic acid or salt thereof, ether, aldehyde, ketone, or sulfoxide group ; wherein at least one of R1 and R2 and at least one of R5 and R6 is a carbonyl-containing group ; each R3 or R4 is independently hydrogen ; an alkyl group ; a hydroxyalkyl group ; an aldehyde group ; a carboxylic acid or salt group ; or an alkyl, aryl, or aralkyl group containing at least one carboxylic ester, a carboxylic acid or salt, ether, aldehyde, ketones or sulfoxide group. The absorbent solution preferably can be thermally regenerated by heating to remove SO2.
通过使用由式 I、II 或 III 所代表的化合物的水溶液作为二氧化硫的吸收剂,从含有二氧化硫的流体中去除二氧化硫:
其中每个 Y 独立地为-(CR22)-或-(CR2)=;每个 R1、R2、R5 或 R6 独立地为氢、烷基、羟烷基、醛基、羧酸基或其盐、或含有至少一个羧酸酯、羧酸或其盐、醚、醛、酮或亚砜基的烷基;其中 R1 和 R2 中的至少一个以及 R5 和 R6 中的至少一个是含羰基的基团;每个 R3 或 R4 独立地是氢;烷基;羟烷基;醛基;羧酸或盐基;或含有至少一个羧酸酯、羧酸或盐、醚、醛、酮或亚砜基团的烷基、芳基或芳烷基。吸收剂溶液最好可以通过加热进行热再生,以去除二氧化硫。