A process for producing para-xylene and ethylbenzene from C.sub.8 aromatics containing ethylbenzene includes the steps of sending C.sub.8 aromatics containing ethylbenzene to an ethylbenzene liquid-phase adsorption separation device, wherein a suction liquid containing ethylbenzene and a suction residual liquid are obtained after the adsorption separation, and the desorbents in the suction liquid and the suction residual liquid are removed to obtain ethylbenzene and a suction residual oil; sending the suction residual oil to a para-xylene adsorption separation device, and unadsorbed components are discharged as a raffinate from the adsorbent bed; the adsorbent bed is rinsed with a desorbent to desorb the para-xylene therein and obtain an extract; the desorbents in the extract and the raffinate are respectively removed to obtain para-xylene and a raffinate oil; sending the raffinate oil to a xylene isomerization device to carry out xylene isomerization, and the isomerization product is fractionated.

A process for producing para-xylene and ethylbenzene from C.sub.8 aromatics containing ethylbenzene includes the steps of sending C.sub.8 aromatics containing ethylbenzene to an ethylbenzene liquid-phase adsorption separation device, wherein a suction liquid containing ethylbenzene and a suction residual liquid are obtained after the adsorption separation, and the desorbents in the suction liquid and the suction residual liquid are removed to obtain ethylbenzene and a suction residual oil; sending the suction residual oil to a para-xylene adsorption separation device, and unadsorbed components are discharged as a raffinate from the adsorbent bed; the adsorbent bed is rinsed with a desorbent to desorb the para-xylene therein and obtain an extract; the desorbents in the extract and the raffinate are respectively removed to obtain para-xylene and a raffinate oil; sending the raffinate oil to a xylene isomerization device to carry out xylene isomerization, and the isomerization product is fractionated.

The present invention discloses a method of separating C8 aromatic hydrocarbon isomers. The anion-pillared metal-organic framework materials with a pore diameter of 5-10 Å is used as adsorbents to achieve selective adsorption and separation of C8 aromatic hydrocarbon isomers by contacting the C8 aromatic hydrocarbon isomers with the adsorbents; the anion-pillared microporous materials are porous materials formed by metal ion M, inorganic anion A and organic ligand L through coordination bonds, with the general formula of [MAL.sub.2].sub.n, where n>4 and n is an integer; the descried “metal ion M” is Fe.sup.2+, Co.sup.2+, Ni.sup.2+, Cu.sup.2+; the descried “inorganic anion A” is SiF.sub.6.sup.2−, NbOF.sub.5.sup.2−, TaF.sub.7.sup.2−, ZrF.sub.6.sup.2−, TiF.sub.6.sup.2−, GeF.sub.6.sup.2−, SO.sub.3CF.sub.3.sup.−, NbF.sub.6.sup.−; the descried “organic ligand L” is selected from any of the following:

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The present invention discloses a method of separating C8 aromatic hydrocarbon isomers. The anion-pillared metal-organic framework materials with a pore diameter of 5-10 Å is used as adsorbents to achieve selective adsorption and separation of C8 aromatic hydrocarbon isomers by contacting the C8 aromatic hydrocarbon isomers with the adsorbents; the anion-pillared microporous materials are porous materials formed by metal ion M, inorganic anion A and organic ligand L through coordination bonds, with the general formula of [MAL.sub.2].sub.n, where n>4 and n is an integer; the descried “metal ion M” is Fe.sup.2+, Co.sup.2+, Ni.sup.2+, Cu.sup.2+; the descried “inorganic anion A” is SiF.sub.6.sup.2−, NbOF.sub.5.sup.2−, TaF.sub.7.sup.2−, ZrF.sub.6.sup.2−, TiF.sub.6.sup.2−, GeF.sub.6.sup.2−, SO.sub.3CF.sub.3.sup.−, NbF.sub.6.sup.−; the descried “organic ligand L” is selected from any of the following:

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A process for preparing a catalyst comprising nickel and copper, comprising the following steps: impregnating the porous support with a volume of a butanol solution of between 0.2 and 0.8 times the total pore volume of the support; maturing the impregnated porous support for 0.5 to 40 hours; impregnating the matured impregnated support with a solution comprising a precursor of the nickel active phase; impregnating the support with a solution containing a copper precursor and a nickel precursor.

A process for preparing a catalyst comprising nickel and copper, comprising the following steps: impregnating the porous support with a volume of a butanol solution of between 0.2 and 0.8 times the total pore volume of the support; maturing the impregnated porous support for 0.5 to 40 hours; impregnating the matured impregnated support with a solution comprising a precursor of the nickel active phase; impregnating the support with a solution containing a copper precursor and a nickel precursor.

A process for preparing a catalyst comprising an active phase based on nickel and an alumina support, which process comprises the following steps: a) said support is impregnated with a volume V1 of a butanol solution of between 0.2 and 0.8 times the total pore volume TPV of said support in order to obtain an impregnated support; b) the impregnated support obtained at the end of step a) is left to mature for 0.5 to 40 hours; c) the matured impregnated support obtained at the end of step b) is impregnated with a solution comprising at least one precursor of the nickel active phase in order to obtain a catalyst precursor; d) the catalyst precursor obtained at the end of step c) is dried at a temperature below 250° C.

A process for preparing a catalyst comprising an active phase based on nickel and an alumina support, which process comprises the following steps: a) said support is impregnated with a volume V1 of a butanol solution of between 0.2 and 0.8 times the total pore volume TPV of said support in order to obtain an impregnated support; b) the impregnated support obtained at the end of step a) is left to mature for 0.5 to 40 hours; c) the matured impregnated support obtained at the end of step b) is impregnated with a solution comprising at least one precursor of the nickel active phase in order to obtain a catalyst precursor; d) the catalyst precursor obtained at the end of step c) is dried at a temperature below 250° C.

The disclosure provides use of an efficient, recyclable, green and friendly catalyst to realize a method of hydrogenation of an unsaturated alkene, and a method for preparing biodiesel through the transesterification of soybean oil with ethanol. The method of hydrogenation of the unsaturated alkene comprises performing a hydrogenation reaction of an unsaturated alkene at ambient temperature and atmospheric pressure by using a CO.sub.2 and magnetic dual-responsive mesoporous poly(ionic liquid) as a catalyst I, and using n-hexane and water as a solvent, to obtain a corresponding saturated alkane. The method for preparing biodiesel through transesterification of soybean oil with ethanol comprises performing a transesterification reaction of soybean oil with ethanol at a temperature of 25-90° C. and atmospheric pressure by using a CO.sub.2 and magnetic dual-responsive mesoporous poly(ionic liquid) as a catalyst II, to obtain the biodiesel.

The disclosure provides use of an efficient, recyclable, green and friendly catalyst to realize a method of hydrogenation of an unsaturated alkene, and a method for preparing biodiesel through the transesterification of soybean oil with ethanol. The method of hydrogenation of the unsaturated alkene comprises performing a hydrogenation reaction of an unsaturated alkene at ambient temperature and atmospheric pressure by using a CO.sub.2 and magnetic dual-responsive mesoporous poly(ionic liquid) as a catalyst I, and using n-hexane and water as a solvent, to obtain a corresponding saturated alkane. The method for preparing biodiesel through transesterification of soybean oil with ethanol comprises performing a transesterification reaction of soybean oil with ethanol at a temperature of 25-90° C. and atmospheric pressure by using a CO.sub.2 and magnetic dual-responsive mesoporous poly(ionic liquid) as a catalyst II, to obtain the biodiesel.