01835nas a2200229   4500008004100000022001400041245011600055210006900171260007300240300001000313490000800323520089300331653005201224653005701276653002701333653004001360653002301400100002601423700001401449700002101463856012101484       2005                        eng d  a1381-116900aIn-Mg-hydrotalcite anionic clay as catalyst or catalyst precursor for friedel-crafts type benzylation reactions0 aInMghydrotalcite anionic clay as catalyst or catalyst precursor   aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcSEP  a76-810 v2393 a<p>In-Mg-hydrotalcite (Mg/In = 3) anionic clay with or without calcination (at 200-800 degrees C) or HCl pretreatment at different temperatures (26 and 80 degrees C) and periods (0.1 or 1.0 h) has been used for the benzylation of benzene and/or substituted benzenes by benzyl chloride. The hydrotalcite before and after its calcination or HCl pretreatment was characterized for its surface area, crystalline phases and basicity. The hydrotalcite particularly after its use in the benzylation reaction, and the catalyst derived from it by its calcination at 800 degrees C followed by HCl pretreatment (at 80 degrees C for 1.0 h), shows high catalytic activity even for the benzylation of benzene. The catalytically active species present in the catalyst in its most active form are the chlorides and oxides of indium on the catalyst surface. (c) 2005 Elsevier B.V. All rights reserved.</p>10aactivation of In-Mg-hydrotalcite by calcination10aactivation of In-Mg-hydrotalcite by HCl pretreatment10abenzylation of benzene10abenzylation of substituted benzenes10aIn-Mg-hydrotalcite1 aChoudhary, Vasant, R.1 aJha, Rani1 aNarkhede, V., S.  uhttps://library.ncl.res.in/content/mg-hydrotalcite-anionic-clay-catalyst-or-catalyst-precursor-friedel-crafts-type-0