Solid Superacid Turpentine Hydration Reaction

Terpineol, as one of the fruitful productions of turpentine, is mostly used in metallurgic floatation, medicine, printing ink, spin, fuel, industrial assist; extensive used in synthetical flavor, is the maximal production of essence industry. It is very important to prepare the high-yield terpineol.This paper prepared terpineol used turpentine as raw material by one-stepcatalyze hydration using self-regulating solid superacid as catalyst. Firstta preparingcatalyst and seeing about its catalysis capability, includes four kinds catalyst, particle diameter, baking temperature, baking time, soakage concentration. It was found thatcatalyst ,solid superacid D2,had optimum activity and its optimal catalysis effect was revealed while the diameter of catalyst more than E3, baking temperature A2, baking time B2, soaking concentration C2. Secondly, preparing terpineol and discussion of its results. It was put up by reaction-temperature, reaction-time, the ratio of catalyst and raw material, the kinds of esterify and dosage, the choice of solvent, catalyst life-span and so on. It was discovered that turpentine transform ratio was 86.29%, the yield ratio of terpineol was 68.89%, the selectivity of solid superacid catalyst was 79.84%. The repetition usage-ratio catalyst was very high and being lasting to using . Thirdly, the testing of catalyst characters, included the influence of preparation methods on MoQ3/ZrO2 structure, testing of superacid acid-mount and its structure characters. After that, putting forward the model of solid superacid on the basis of former discussions. It has been demonstrated by means of XRD , TEM and IAS that the preparation method has a decisive effect on the Structure of D2. D2 prepared by inprefnating Zr(OH)4 with the solution ammonium molybdate and then calcinating it at high temperature is a solid superacid ,while D2 prepared by impregnating crystallized ZrO2 is a catalyst for partial oxidation. There are some obvious difference in morphology of the support and in the forms of the active component between them. ZrOa is dominantly monoclinic, and MoO3 exists in the state of monolayer dispersion. MoO3 in D2 exists on metastable tetragonal ZrO2 in two kinds of surface species. When MoO3 content is beyond a certain value, it reacts with ZrO2(t) and turn into bulk Zr(MoO4)2 at A3. The Mo in Mo-O-Zr surface species is responsible for thesuperacidity of D2.