Catalytic cracking method for hydrocarbon oil
A catalytic cracking and hydrocarbon oil technology, applied in catalytic cracking, chemical instruments and methods, cracking, etc., can solve problems such as poor product distribution, negative structural stability of molecular sieves, easy collapse of molecular sieve skeletons, etc., to reduce sulfur content and improve Effects of conversion rate of heavy oil, improvement of yield of cracked gasoline and yield of light oil
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Embodiment 1-5
[0034] These examples illustrate the preparation of the catalyst precursors provided by the present invention.
[0035] Among the raw materials used, the molecular sieves are all produced by Sinopec Catalyst Qilu Branch. Among them, the unit cell constant of NaY molecular sieve is 2.473 nanometers, the content of sodium oxide is 14% by weight, the solid content is 79.48% by weight, and the crystallinity is 100%. The unit cell constant of REHY molecular sieve 2.470 nanometers, sodium oxide content 3.8 wt%, rare earth oxide content 6.5 wt%, solid content 78.4 wt%, crystallinity 86%; V-REHY molecular sieve unit cell constant is 2.469 nm, sodium oxide content 3.8 wt%, rare earth oxide The vanadium content is 6.5% by weight, the vanadium (calculated as simple substance) content is 1.0% by weight, the solid content is 77.9% by weight, and the crystallinity is 77%. Kaolin is an industrial product of China Kaolin Company, and its solid content is 84% by weight; pseudoboehmite is pro...
Embodiment 6-7
[0045] In 100 grams (dry basis weight) catalyst precursor CM-1, CM-2, add deionized water respectively, make the water content in the catalyst precursor be 15% by weight (based on the dry basis weight of the catalyst precursor), Then at 450 ° C, 100% steam atmosphere roasting 1.5 hours, then with 2 liters of ammonium ion concentration of 6% by weight (NH 4 ) 2 SO 4 Mix the aqueous solution, carry out ion exchange at 90°C for 45 minutes, add hydrochloric acid during the exchange process, keep the pH value of the slurry at 4.0, then filter, wash the filter cake with deionized water until there is no acid group in the washed water, and put the wet filter cake at 750 ℃ roasting for 2 hours, and then with 2 liters of ammonium ion concentration of 3% by weight (NH 4 ) 2 SO 4 The aqueous solution was ion-exchanged at 85°C for 30 minutes. During the exchange process, the pH value of the slurry was controlled to 3.5 with hydrochloric acid, filtered, and the filter cake was washed w...
Embodiment 8-9
[0047] In 110 grams of catalyst precursors CM-3 (based on the dry weight of CM-3, water content 9% by weight), CM-4 (based on the dry weight of CM-4, water content 9.5% by weight) Add 10 grams of deionized water respectively, and after roasting in a steam atmosphere at 400° C. for 1 hour, it is 4% by weight (NH 4 ) 2 SO 4 The aqueous solution was subjected to ion exchange at 90° C. for 60 minutes. During the exchange, hydrochloric acid was added to keep the pH value of the slurry at 4.0. After filtration, the filter cake was washed with deionized water 10 times the weight of the catalyst. This wet filter cake was roasted at 650° C. for 4 hours, and then mixed with 2 liters of ammonium ion concentration of 2% by weight (NH 4 ) 2 SO 4 The aqueous solution was ion-exchanged at 90°C for 40 minutes, hydrochloric acid was supplemented during the exchange process, so that the pH value of the slurry was 3.5, filtered, and the filter cake was washed with deionized water 10 times th...
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Abstract
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