Catalyst for preparing ethyl benzene and styrene by toluene side chain alkylation and application thereof
An alkylation and catalyst technology, which is applied in the field of molecular sieve catalysts for the production of ethylbenzene styrene by alkylation of toluene side chains, can solve the problems of low stability and low utilization rate of methanol, and achieve the effect of improving catalytic activity
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Embodiment 1
[0040] Take silicon aluminum than SiO 2 / Al 2 o 3 = NaX molecular sieve of 2.2, with KNO 3 solution, RbNO 3 solution and CsNO 3 The solution was ion-exchanged in turn, filtered and washed, and then dried at 100°C for 10 hours. After the exchange, the ion exchange degree of the sodium ion in the alkali metal ion exchange molecular sieve in the catalyst is 85%. Then cesium nitrate and europium nitrate are formulated into a solution, and additional cesium and europium are impregnated onto the above-mentioned modified molecular sieve material. The additional loading molar amount x of cesium on the supported catalyst is 2%, and the additional loading amount y of europium is 0.8%.
[0041] Press the catalyst obtained above to form a 40-60-mesh granular catalyst, put it into the reactor, and under normal pressure, the molar ratio of toluene to methanol is 5, in 3.2 hours -1 liquid space velocity, 425°C, N 2 Activity evaluation was performed at a flow rate of 10 ml / min. The c...
Embodiment 2
[0043] Take silicon aluminum than SiO 2 / Al 2 o 3 = NaX molecular sieve of 2.5, with KNO 3 solution, RbNO 3 solution and CsNO 3 The solution was ion-exchanged in turn, filtered and washed, and then dried at 100°C for 10 hours. After the exchange, the ion exchange degree of the sodium ion in the alkali metal ion exchange molecular sieve in the catalyst is 85%. Then cesium nitrate and europium nitrate are formulated into a solution, and additional cesium and europium are impregnated onto the above-mentioned modified molecular sieve material. The additional loading molar amount x of cesium on the supported catalyst is 2%, and the additional loading amount y of europium is 0.8%.
[0044] Press the catalyst obtained above to form a 40-60-mesh granular catalyst, put it into the reactor, and under normal pressure, the molar ratio of toluene to methanol is 5, in 3.2 hours -1 liquid space velocity, 425°C, N 2 Activity evaluation was performed at a flow rate of 10 ml / min. The c...
Embodiment 3
[0046] Take silicon aluminum than SiO 2 / Al 2 o 3 =3 NaX molecular sieve, with KNO 3 solution, RbNO 3 solution and CsNO 3 The solution was ion-exchanged in turn, filtered and washed, and then dried at 100°C for 10 hours. After the exchange, the ion exchange degree of the sodium ion in the alkali metal ion exchange molecular sieve in the catalyst is 85%. Then cesium nitrate and europium nitrate are formulated into a solution, and additional cesium and europium are impregnated onto the above-mentioned modified molecular sieve material. The additional loading molar amount x of cesium on the supported catalyst is 2%, and the additional loading amount y of europium is 0.8%.
[0047] Press the catalyst obtained above to form a 40-60-mesh granular catalyst, put it into the reactor, and under normal pressure, the molar ratio of toluene to methanol is 5, in 3.2 hours -1 liquid space velocity, 425°C, N 2 Activity evaluation was performed at a flow rate of 10 ml / min. The catalys...
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