有机胺制碱的回顾与展望

Review and Prospect for Manufacturing Soda by Amine Process

为提高钠利用率 ,5 0年代提出用有机胺替代氨碱法中的氨 ,称为有机胺制碱。它虽能显著提高钠利用率 ,但胺的再生使用一直没能解决。早期提出的石灰蒸馏胺再生法 ,仍有废液废渣产生。80年代前苏联提出的电化学胺再生法 ,其实质是电化学制碱 ,不仅消耗大量电能 ,同时产生出NaHCO3一半量的氯。 90年代提出的胺盐热分解再生法 ,因制碱速度受控于气体的热扩散速度 ,使生产成本提高 ,生产强度受到限制。有机胺制碱要替代氨碱法成为胺碱法 。

In order to raise utilization ratio of sodium the process for manufacturing soda by amine was adopted in 1950s in which amine replaced ammonia of Solvay process.Although it could greatly increase the utilization ratio of sodium the problem of amine regeneration have not been resolved.The lime distillation process for regenerating amine suggested early also produced waste liquor and residue.The electrochemical process for regenerating amine raised by early the Soviet Union not only consumed a lot of energy but also produced chlorine which was half of that of NaHCO 3.The amine salts thermalysis process for regenerating amine raised in 1990s was of higher cost of production because the rate for manufacturing soda was controlled by the rate of thermal diffusion so that the intensity of production was limited.For resolving above problems in manufacturing soda by amine it is necessary for us to find out other new means.