Preparation Of Supported Ni-P Amorphous Catalyst And Its Catalytic Effect On α-pinene Hydrogenatio

Turpentine is a valuable renewable natural resources and is also a kind of colorless or light yellow transparent non-toxic liquid,with aromatic odor,it is natural chemical raw materials and the sustainable production,a wealth of resources in our country,mainly for the production of camphor,borneol,terpineol,pine oil terpene resin et al.Turpentine mainly consists in α-pinene and β-pinene,important intermediates of cis pinane by catalytic hydrogenation pinene,widely used in perfume industry,compared with developed countries,Less species,lower quality,therefore the research and development of the deep processing of products is very meaning.This paper by industrial-grade turpentine as raw material,anhydrous ethanol as solvent,supported Ni-P amorphous catalytic turpentine oil hydrogenation reaction,the preparation conditions of catalysts was studied.On this basis,the influence of the turpentine oil hydrogenation reaction was studied through the reaction pressure,reaction temperature,dosage of catalyst,solvent and reaction time.The appropriate reaction conditions were determined,and the service life of the catalysts was investigated..Specific to do the following several aspects of research:(1)A series of supported amorphous catalysts were prepared by impregnation reduction,the prepared catalyst catalyzed turpentine of hydrogenation reaction,the hydrogenation products were analyzed by gas chromatography,in order to investigate the catalytic activity of catalyst.Getting supported Ni-P/TiO2 amorphous catalyst by selection and the preparation conditions are studied,the suitable preparation conditions.(2)The process conditions of supported Ni-P/TiO2 amorphous catalyst catalyzing hydrogenation of turpentine was investigated by single factor and orthogonal experiments to get the optimum conditions of reaction:the reaction pressure was A4,the reaction time was E4,the reaction temperature was B3,the catalyst was Ni-P/TiO2,C3 of the catalyst as raw material quality,turpentine 20mL,solvent D3.Repeating experiments in this condition,the results showed that the catalyst had better activity,and the repeatability was better.The investigation experiments of catalyst life showed that the catalyst continuously were used for 8 times,the conversion of α-pinene was still above 99%,the selective of cis-pinane can reach more than 96%.(3)Supported Ni-P/TiO2 amorphous catalyst was characterized using BET,TEM-EDS,XRD,XPS and DSC.The result showed that the active component of catalyst was amorphous structure,the better dispersion and smaller particle size,about 100nm,with high specific surface area,up to 141m2/g,peak significantly decreased after deactivation;Ni-P amorphous catalyst serious agglomeration and poor dispersion.In the optimum conditions,supported Ni-P/TiO2 amorphous catalyst showed good activity,the conversion of α-pinene reached 99%,the selectivity of cis-pinane reached 98%,while the activity of Ni-P amorphous catalyst was lower,the conversion ofα-pinene was 81%,the selectivity of cis-pinane changes less,reached 94%.This was mainly due to the supported catalyst particle size,specific surface area increases,increases the catalytic activity.