Study On Oil-soluble Catalysts And Accessory Ingredients In The Residue Slurry-bed Hydrocracking

The impact of synthesis conditions on oil-soluble catalyst was studied and the thesis screened out the better synthesis conditions. Post-sulfide catalysts were characterized by microscopic technique, scanning electron microscopy (SEM), X-ray diffraction (XRD) and laser particle. Simultaneously, effect of oil-soluble catalyst and co-catalyst on hydrocracking residue reaction was studied in autoclave simulating Slurry Phase Hydrocracking Reaction, and the mechanism of oil-soluble catalyst has been carried on the explanation.It was inferred that, the optimality condition of oil-soluble Mo catalyst: molar ratio of reactant (compound D: compound E: compound F) is about 1:1:5~6, reaction temperature is about 220℃,reaction time is about 4h. The optimality condition of oil-soluble Co catalyst: The concentration of compound C is about 15%. The optimality condition of oil-soluble Ni catalyst: the concentration of compound A is about 15%, raw materials ratio (compound F: compound A) is about 1:0.995, the temperature of saponification is about 95℃, the time of saponification is about 3h; the temperature of the metathetical reaction is about 90℃, the time is about 2h, the concentration of solution is about 10%, and drop gradually. Most of the oil-soluble catalysts reunite themselves in varying degree. The vulcanized products of oil-soluble Mo catalyst exist as the microcrystalline state of MoS2 (Rhombohedral). The vulcanized products of oil-soluble Ni catalyst exist as the crystal of Ni3S2 (Rhombohedral) and the microcrystalline state of NiS(Rhombohedral), mainly exists as the crystal of Ni3S2. The vulcanized products of oil-soluble Co catalyst exist as the crystal of both Co3S4(Cubic)and Co9S8(Cubic) and the proportion of Co9S8 is slightly larger than the Co3S4. The oil-soluble Mo catalyst can be vulcanized more easily than Ni catalyst, and at a lower temperature sulfuration.The order of hydrogenation activity is Mo> Co > Ni. The result is better while dealing with Venezuela-380 residue by oil-soluble Mo catalyst, and it has a certain anti-temperate during the reaction. Oil-soluble catalyst Mo/Ni have played a certain synergistic effect. Mo/Ni catalyst formed a large number of granular material in process of vulcanization. Mo catalyst existed as sulfide in non-crystalline form after vulcanizing, and could be better dispersed in the oil samples. Ni catalyst existed as Ni7S6. SA2 played a certain role in inhibiting coke when the hydrocracking of co-catalysts were studied; SA2 and oil-soluble catalysts have played a significant role in inhibiting coke formation, the optical concentration is about 0.1%. The longer the carbon-chain, the less coking of the wall , when the same type of amine and oil-soluble catalyst co-acted.