A kind of heavy oil hydrotreating method
A treatment method, heavy oil hydrogenation technology, applied in the treatment of hydrocarbon oil, chemical instruments and methods, refined hydrocarbon oil, etc., can solve the problem that the catalytic effect cannot be effectively exerted, and achieve good demetallization, slow down the deactivation speed, and repeatability and good controllability
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[0021] According to a preferred embodiment of the present invention, the modified support is prepared by a method comprising the following steps: repeatedly impregnating and drying the hydrothermally treated support in sequence, and roasting the dried product obtained last time, Wherein, the impregnation solution used in each impregnation process contains compounds that provide the same or different acidic additives, the number of repetitions is n≥2, and when n≥3, from the second impregnation to the n-1 impregnation During the process, the drying temperature after each impregnation is 20-150°C higher than that of the adjacent previous impregnation, preferably 30-120°C, more preferably 30-80°C; the drying time after each impregnation The drying time is 1-10 hours longer, preferably 1-9 hours, more preferably 2-5 hours longer than the immediately preceding impregnation.
[0022] In the preparation method of the above-mentioned modified carrier, the carrier after the hydrothermal...
preparation example 1
[0089] This preparation example is used to illustrate the preparation process of the alumina carrier used in the present invention.
[0090] Take by weighing 1000 grams of dry rubber powder produced by Changling Catalyst Factory (the dry basis is 71% by weight, wherein the content of pseudoboehmite is 68% by weight, the content of trihydrate alumina is 5% by weight, and the balance is amorphous alumina ), 30 grams of Tianjing powder (product of Henan Lankao Tianjing Rubber Factory) and 30g of hydroxymethyl cellulose and mix evenly, then add 1200 milliliters of aqueous solution containing 28g of nitric acid, and extrude on a plunger type extruder into an outer diameter of 2.5 mm, a Raschig ring bar with an inner diameter of 1mm. Then the wet Raschig strip was dried at 120° C. for 4 hours, and then fired at 960° C. for 3 hours to obtain the protective agent carrier Z1. Measured by the BET method, the pore volume of the protective agent carrier Z1 is 0.95mL / g, and the specific s...
Embodiment 1
[0094] This example is used to illustrate the heavy oil hydrotreating method provided by the present invention.
[0095] (1) Preparation of modified carrier
[0096] (1-1) Take 200 grams of carriers Z1, Z2 and Z3 prepared in Preparation Example 1, firstly treat the carriers at 70°C for 24 hours with hydrothermal treatment, and then use 165 ml of hydrothermally treated carriers with a temperature of 50°C containing 15 g / L H 3 BO 3 The aqueous solution (pH value is 6) is saturated and impregnated for 1 hour, and then dried at 100 ° C for 3 hours to obtain a carrier loaded with component B;
[0097] (1-2) Put the carrier loaded with component B obtained in step (1-1) in 140 ml of 50°C containing 15 g / L NH 4 F was immersed in an aqueous solution (pH value of 11) for 1 hour, then dried at 120°C for 3 hours, and then calcined at 400°C for 3 hours to obtain modified supports S1-1, S2-1, and S3-1.
[0098] (2) Preparation of protective agent, demetallization agent and desulfurizat...
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