申请人:——
公开号:US20040049079A1
公开(公告)日:2004-03-11
A method of inhibiting or preventing the use of anhydrous ammonia as a solvent in a dissolving metal reduction process comprises adding to anhydrous ammonia a chemical reagent which is capable of scavenging solvated electrons generated when alkali or alkaline earth metal is dissolved in the anhydrous ammonia, the chemical reagent being added to the anhydrous ammonia such that when alkali metal is dissolved in the anhydrous ammonia containing the chemical reagent and thereafter ephedrine, pseudoephedrine or combination thereof is introduced to the anhydrous ammonia to produce a reaction product, the methamphetamine yield in the reaction product is below 50%, preferably below 10%. and more preferably below 1%. Preferred chemical reagents include Fe(III)citrate, ferrocene, 2-chloro-6-(trichloromethyl)pyridine and 1,1,1,2-tetrafluoroethane.
一种抑制或预防无水氨作为溶剂在溶解金属还原过程中使用的方法,包括向无水氨中添加一种化学试剂,该化学试剂能够清除碱金属或碱土金属在无水氨中溶解时产生的溶剂化电子,该化学试剂被添加到无水氨中,使得当碱金属在含有该化学试剂的无水氨中溶解后,随后向无水氨中引入麻黄碱、伪麻黄碱或两者的组合以产生反应产物时,反应产物中的甲基苯丙胺收率低于50%,优选低于10%,更优选低于1%。优选的化学试剂包括Fe(III)柠檬酸盐,二茂铁,2-氯-6-(三氯甲基)吡啶和1,1,1,2-四氟乙烷。