Patent ID: 6387349
Filing Date: 2002-05-14
Classification: B01J,C01B,Y10S

Abstract:
A process for the microwave induced preparation of a crystalline, microporous titanium silicalite having the chemical formula: xTiO2Â·(1âˆ’x)SiO2, wherein x is greater than or equal to 0.043 and less than or equal to 0.11, an x-ray diffraction pattern as follows:2&thgr; Â± 0.05Relative Intensity7.82vs8.75ms13.20w13.98w14.74mw15.62w15.98w16.45w17.72w17.64w17.80w19.22w20.34mw20.82mw23.12vs24.28ms24.51ms24.40ms26.05w26.99w28.04w29.26w29.99mw45.12w45.51wwhere vs = very strong s = strong m = medium w = weak and an infrared absorption spectra as follows:cmâˆ’1Relative Intensity456S544MS800W960W1120VS1216Swhere VS = very strong S = strong M = medium W = weak said process comprisingheating a gel comprising a mixture containing (a) a source of silicon oxide, (b) a source of titanium oxide, (c) tetrapropyl ammonium hydroxide, and (d) water by microwave irradiation at autogenous pressure in the range of 10-15 bar and at a temperature in the range of 100 to 200Â° C. for a time period in the range of 30-120 minutes to obtain the titanium silicalite, calcining the titanium silicate at a temperature of greater than or equal to 300Â° C.