摘要:
The present invention relates to metalloaluminophosphate (MeAPO) molecular sieve with lamellar crystal morphology having an empirical chemical composition on an anhydrous basis, after synthesis and calcination, expressed by the formula HxMey AlzPkO2 wherein, y+z+k=1 x = 10 and advantageously ranges from 10 to 100. In a preferred embodiment T is
摘要:
The invention relates to a process for the conversion of ethylene into olefins having at least four carbon atoms wherein the process comprises: a) providing feedstream comprising from 0.5 to 50 wt% of ethylene as based on total weight of the feedstream; b) putting the feedstream in contact with a catalyst at a temperature ranging from 80 to 500°C, under a pressure ranging from 0.5 to 2.9 MPa; and at a weight hourly space velocity (WHSV) of the feedstream ranging from 0.1 to 10.0 h -1 ; c) recovering the olefins having at least four carbon atoms; and further wherein the catalyst of step b) comprises a mesoporous material with one or more metals of group VIIIB and/or of group VIB as active phase
摘要:
The present invention also relates to a method for preparing metalloaluminophosphate (MeAPO) molecular sieve said method comprising: a) forming a reaction mixture containing a texture influencing agent (TIA), an organic templating agent (TEMP), at least a reactive inorganic source of MeO2 insoluble in the TIA, reactive sources of Al2O3 and P2O5, b) crystallizing the above reaction mixture thus formed until crystals of the metalloaluminophosphate are formed, c) recovering a solid reaction product, d) washing it with water to remove the TIA and e) calcinating it to remove the organic template. In a usual embodiment said reaction mixture has a composition expressed in terms of molar oxide ratios of :TEMP/Al2O3= 0.3-5, more desirable 0.5-2 MeO2/Al2O3= 0.005-2.0, more desirable 0.022-0.8 P2O5/Al2O3 = 0.5-2, more desirable 0.8-1.2 TIA/Al2O3 = 3-30, more desirable 6-20. In a usual embodiment the metalloaluminophosphate (MeAPO) molecular sieves made with the above method have a lamellar crystal morphology having an empirical chemical composition on an anhydrous basis, after synthesis and calcination, expressed by the formula HxMeyAlzPkO2 wherein, y+z+k=1, x
摘要:
A catalyst composition contains an inorganic porous material with pore diameters of at least 2 nm and of crystals of molecular sieve. The crystals of molecular sieve have an average diameter, measured by scanning electron microscopy, not bigger than 50 nm. The catalyst composition has a concentration of acid sites ranges from 50 to 1200 μmol/g measured by TPD NH3 adsorption. An XRD pattern of the catalyst composition is the same as an XRD pattern of the inorganic porous material.