| 摘要 |
A process is disclosed for removal of mercaptans from mercaptan-containing low boiling hydrocarbon mixture wherein said mixtures are fed to a contact zone containing a crystalline metal silicate which in dehydrated form has a composition in terms of moles of the oxides: (1.0+/-0.3)(R)2/n0.[aFe2O3.bAl2O3.cGa2O3. y(dSiO2.eGeO2)], where R is one or more mono- or bivalent cations and a, b, c, d, e, y and n are defined as hereinafter disclosed. The disclosed silicate crystalline metal silicate is (a) thermally stable up to a temperature above 600 DEG C.; (b) exhibits a specified X-ray powder diffraction pattern showing the reflections set out in Table A of the specification; (c) in the formula which represents the composition of the silicate expressed in terms of moles of the oxides, the (Al2O3+Fe2O3)/SiO2 molar ratio is lower than 0.1; and separating from said crystalline silicate a hydrocarbon mixture product having a lower mercaptan content than the feed.
|
