| 摘要 |
<p>PURPOSE:To regenerate a zeolite catalyst at a high rate of regeneration by bringing the catalyst having reduced catalytic activity after use in the hydration reaction of olefin in a liq. phase into successive contact with an aq. soln. of an inorg. alkali and nitric acid. CONSTITUTION:Faujasite, ZSM-5 or other zeolite catalyst having reduced catalytic activity after use in the hydration reaction of olefin in a liq. phase is brought into successive contact with an aq. soln. of an inorg. alkali such as the hydroxide, carbonate or hydrogencarbonate of an alkali metal and an aq. soln. of nitric acid. By this contact, the zeolite catalyst is regenerated at a high rate of regeneration. The pref. amt. of the inorg. salt in the aq. alkali soln. is about 0.5-5 equiv. per 1kg of the catalyst and the pref. temp. of the soln. brought into contact with the catalyst is about 10-150 deg.C. The pref. amt. of the nitric acid brought into contact with the catalyst is about 2-20 mol per 1kg of the catalyst.</p> |
