New Catalysts Help Paraffin to Achieve Food Grade Standards

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China Drying Network News The preparation method of a petroleum wax hydrotreating catalyst developed by the China Petroleum and Petrochemical Research Institute has been granted a national invention patent. The hydrotreating catalyst prepared by this technology can process paraffin wax raw materials of different qualities, and according to different raw materials, suitable process conditions can be selected to obtain qualified products. Paraffin produced using this catalyst can meet the food grade paraffin standard, and the microcrystalline wax produced can meet the food grade microcrystalline wax standard.

The pores of the catalysts prepared by this technique are concentrated and the surface acidity is suitable, so that the wax material molecules can fully react with the catalyst active center under relatively mild reaction conditions, and the wax can still have good performance even at a lower reaction temperature and reaction pressure. Hydrogenation activity. This overcomes the disadvantages of the complex process and difficulty of the other methods, and the inability of the prepared catalyst to produce food-grade paraffins of acceptable color.

This technology achieves effective modulation of surface acidity and pore structure in one step, greatly improves the dispersion of active metal on the surface of the support, adjusts the pore structure of the support, increases the pore volume and average radius, and ensures the active metal on the support surface. Single layer dispersion and full play its role to improve the catalyst hydrogenation activity.

The main method of wax refining is hydrotreating, and its technical core is high-performance hydrotreating catalyst. The purpose is to retain the basic composition of normal alkanes and to remove the fused rings represented by 3,4-benzofluorene. Carcinogens such as aromatic hydrocarbons and sulfur, nitrogen and oxygen of non-aromatic hydrocarbons. The paraffin wax hydrorefining process is a highly selective reaction process. Removal of impurities such as sulfur, nitrogen, and oxygen in the raw materials and hydrogenation of unsaturated components such as polycyclic aromatic hydrocarbons do not allow the cracking reaction to occur, otherwise it will result in Wax oil content and penetration increase.

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