| 摘要 |
Disclosed is a method of preparing a calcium phosphate catalyst, which comprises reacting calcium salts with phosphoric acid salts in aqueous ammonia, separating the resulting precipitate from the reaction mixture, suitably shaping said precipitate, drying it, and subjecting to heat treatment within a temperature range of 450 to 600 DEG C in the presence of steam mixed with at least one of phosphoric acid, an aldehyde, an oxygen-containing heterocyclic compound, an alcohol, a diene hydrocarbon, an inert gas or air. The catalyst may be used in the manufacture of isoprene from isobutene and formaldehyde or by decomposition of 1,3 dioxanes as well as in alcohol dehydration reactions. |
