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A kind of multi-stage porous hydrocracking catalyst and its application

A hydrocracking and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, hydrocarbon oil cracking, etc., can solve problems affecting catalyst pore distribution, metal carrier interaction changes, and reducing active hydroxyl groups on the surface of alumina precursors, etc.

Active Publication Date: 2018-11-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alumina preparation process adopts a two-step aging method for preparation. Since the treatment conditions in the aging process are generally harsh, it will reduce the active hydroxyl groups on the surface of the alumina precursor, change the interaction between the metal carrier and the catalyst. The pore distribution reduces the reactivity of the catalyst

Method used

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  • A kind of multi-stage porous hydrocracking catalyst and its application
  • A kind of multi-stage porous hydrocracking catalyst and its application
  • A kind of multi-stage porous hydrocracking catalyst and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 298 grams of pseudo-boehmite SB (dry basis 0.75, dry basis measurement method is to put a certain amount of raw powder into a crucible with a lid into the muffle furnace, heat up to 700 ℃ constant temperature for 1 hour, calculate the remainder of the same original The ratio of powder, the same below) and 366.7 grams of ultra-stable molecular sieve LAY (produced by Changling Catalyst Plant of Sinopec Catalyst Branch, unit cell constant 24.58, pore volume 0.39ml / g, dry basis 0.75), sesame powder 16g, 12ml purity Mix 65% concentrated nitric acid and 400ml deionized water evenly, extrude it into a trilobal strip with a circumscribed circle diameter of 1.6 mm, dry at 120°C for 3 hours, and roast at 600°C for 3 hours to obtain a carrier. The composition of the catalyst carrier is shown in Table 2.

[0055] After cooling to room temperature, take 100 grams of carrier containing ammonium metatungstate (Sichuan Zigong Cemented Carbide Factory, the content of tungsten oxide is 82% ...

Embodiment 2

[0057] Mix 298 grams of pseudo-boehmite PB1-2 (0.74 on a dry basis) with 366.7 grams of ultra-stable molecular sieve LAY, 16 grams of sesame powder, 12 ml of 65% concentrated nitric acid, and 482 ml of deionized water. A trilobal strip with a diameter of 1.6 mm was dried at 120°C for 3 hours and calcined at 600°C for 3 hours to obtain a carrier. The composition of the catalyst carrier is shown in Table 2.

[0058] After cooling to room temperature, take 100 grams of carrier containing ammonium metatungstate (Sichuan Zigong Cemented Carbide Factory, the content of tungsten oxide is 82% by weight), 50 grams of basic nickel carbonate (Jiangsu Yixing Xuchi Chemical Co., Ltd., nickel oxide content) (51% by weight) 8.7g, 10.5g of citric acid 78ml aqueous solution were immersed and baked at 180°C for 10 hours to obtain catalyst C-2. Based on the total amount of catalyst, the mass fractions of metal components in C-2 (calculated values, the same below) are listed in Table 2.

Embodiment 3

[0060] Mix 296 grams of pseudo-boehmite PB1-3 (0.76 on a dry basis) with 366.7 grams of ultra-stable molecular sieve LAY, 16 grams of sesame powder, 3.5 ml of 65% concentrated nitric acid, and 700 ml of deionized water. A trilobal strip with a circle diameter of 1.6 mm was dried at 120°C for 3 hours and calcined at 600°C for 3 hours to obtain a carrier. The composition of the catalyst carrier is shown in Table 2.

[0061] After cooling to room temperature, take 100 grams of carrier containing ammonium metatungstate (Sichuan Zigong Cemented Carbide Factory, the content of tungsten oxide is 82% by weight), 50 grams of basic nickel carbonate (Jiangsu Yixing Xuchi Chemical Co., Ltd., nickel oxide content) (51% by weight) 8.7g, 10.5g of citric acid 110ml aqueous solution immersion, 180°C for 10 hours, to obtain catalyst C-2. Based on the total amount of catalyst, the mass fractions of metal components in C-2 (calculated values, the same below) are listed in Table 2.

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Abstract

The invention provides a hierarchically porous hydrocracking catalyst and an application thereof. The catalyst comprises a carrier and metal components with hydrogenation activity which are loaded on the carrier. The carrier comprises a Y type molecular sieve and aluminum oxide, and metal components with hydrogenation activity are selected from molybdenum and / or tungsten in VIB group as well as nickel and / or cobalt in VIII group. The catalyst is characterized in that pore distribution of the catalyst satisfies the following conditions: the volume of pores whose diameters are less than 2nm accounts for 1.5-75% of total volume of pores of the catalyst, the volume of pores whose diameters are 2-100 nm accounts for 20-85% of total volume of pores of the catalyst, and the volume of pores whose diameters are more than 100 nm accounts for 2.5-65% of total volume of pores of the catalyst. Compared with the catalyst in the prior art, the catalyst has higher hydrocracking activity.

Description

Technical field [0001] The invention relates to a hydrocracking catalyst and its application. Background technique [0002] Industrial hydrocracking feeds include 350~540℃ fractions such as VGO. The heavy fractions have a large molecular weight and require catalysts to provide larger pore spaces. The pores of supported catalysts are mainly determined by the support. This requires increasing the pore size of the support and improving the contact of reaction molecules. The ability to hydrogenate active metals into the catalyst. Since molecular sieves and metal sulfides have relatively small pore volumes, especially small medium and large pores that meet the requirements of petroleum processing for the feed of macromolecular hydrocarbons, conventional methods can introduce large pore volume heat-resistant inorganic oxides into the hydrocracking catalyst carrier. The method of the matrix is ​​achieved, for example, the introduction of an alumina matrix. [0003] ZL01123765.1 provides...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/48C10G47/20
Inventor 毛以朝李明丰杨清河聂红朱玫董建伟
Owner CHINA PETROLEUM & CHEM CORP
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