两种Betti碱对硫化氢吸收性能研究

Preparation of two Betti alkalis and survey about absorption of hydrogen sulfide by betti alkalis

采用β-萘酚、甲醛、二乙胺或二羟乙胺等为基本原料,通过Mannich反应合成出了两种Betti碱化合物1-[(二乙基氨基)甲基]萘-2-醇(DAL)和1-{[双(2-羟乙基)氨基]甲基}萘-2-醇(BHAL)。考察了硫化氢吸收剂的种类、吸收剂的浓度、吸收温度以及吸收时间对硫化氢吸收效率的影响。实验结果表明:在20℃,吸收时间1.5h,n(H2SO4)∶n(FeS)<0.6∶0.6(mol),H2S的流量低于0.375L·min^(-1),Betti碱DAL和BHAL作为硫化氢吸收剂,在浓度为1wt%时,对硫化氢的吸收效率都为0.9以上,且BHAL的吸收效率又比DAL的提高了0.05左右;而后通过实验方法对吸收过后的吸收剂提取Betti碱,产率稳定在70%,实现了可循环利用。

Two Betti alkalis(DAL and BHAL)were prepared through Mannich reaction withβ-naphthol,37%formaldehyde,diethyl amine or diethanolamine.Absorption efficiency of H_2S was investigated from the viewpoints of types and concentrations of absorbent,absorption temperature and time.Experimental results showed that the absorption efficiency of 1 wt% BHAL and DAL,superior to other absorbents,were both more than 0.9 at 20℃absorption time 1.5 h,n(H_2SO_4)∶n(FeS)<0.6∶0.6(mol),the flow rate of H_2S<0.375 L·min^(-1) and the absorption efficiency of BHAL was more than that of DAL by 0.05.What's more,yield of Betti alkalis was around 70%through the experiments of extraction,which realized the recycling of resources.