“…Again, large amounts of unwanted salt, CaC12, are produced. Recently, Nippon Shokubai has developed a new, solid, acid-base bifunctional catalyst for the synthesis of ethylenimine and a commercial facility has been in operation (2000 tons/year) since 1990 (Ueshima, 1993 andHolderich, 1993 and references therein). The catalyst is a Si/Cs/P mixed oxide.…”