Modified clay and preparation method thereof

A clay and modification technology, which is applied in the field of modified clay and its preparation, can solve the problems of increasing coke selection yield, long modification period and high silicon extraction rate, and achieves improved heavy oil cracking capacity, high micro-reactive activity, and high cracking capacity. Ability-enhancing effect

Active Publication Date: 2009-12-02
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the main problems in the existing modification methods are that the extraction rate of silicon in kaolin is too high, resulting in low product yield; The third is that part of the modi...

Method used

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  • Modified clay and preparation method thereof
  • Modified clay and preparation method thereof
  • Modified clay and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Roast 600 g of kaolin in a muffle furnace at 950 ° C for 1 hour, mix it with 1500 ml of deionized water evenly after cooling, add 630 g of sodium hydroxide solution with 10 moles of hydroxide ions / liter, and heat up to 92 °C under stirring. ℃, stirred and reacted for 2 hours, then filtered, washed with 5000 ml of 75 ℃ dilute sulfuric acid, and then made a slurry with 5000 ml of deionized water, added 38 grams of phosphoric acid, 30 ml of rare earth chloride solution, stirred at 60 ℃ for 0.5 hours, filtered and drying to obtain the modified clay A1 prepared by the present invention.

Embodiment 2

[0049] Roast 600g of halloysite at 1050°C in a muffle furnace for 0.5 hours, mix it with 2500ml of deionized water after cooling, add 1600g of sodium hydroxide solution with 5 moles of hydroxide ions / liter and 1 mole of hydroxide 680 grams of water glass per liter, under stirring, heat up to 75°C, stir and react for 3 hours, then filter, wash with 7500 ml of dilute hydrochloric acid at 75°C, beat with 10,000 ml of deionized water, add 25 grams of ammonium phosphate , 36 ml of rare earth nitrate solution, stirred at 40° C. for 2 hours, filtered, and dried to obtain modified clay A2 prepared by the present invention.

Embodiment 3

[0051] 600g of kaolin was roasted at 850°C for 3 hours in a muffle furnace, mixed evenly with 3500 milliliters of deionized water after cooling, and 800 grams of sodium hydroxide solution of 14 moles of hydroxide ions / liter and 1 mole of hydroxide ions / liter were added. liter of sodium metaaluminate 400g, under stirring, heat up to 120°C, stir and react for 1 hour, then filter, wash with 10000ml of dilute sulfuric acid at 50°C, beat with 7500ml of deionized water, add 9g of phosphorous acid , 50 ml of rare earth chloride solution, stirred at 80° C. for 1 hour, filtered, and dried to obtain modified clay A3 prepared in the present invention.

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Abstract

The invention relates to a modified clay and a preparation method thereof. The modified clay is prepared by being roasted at 800-1100 DEG C for 0.3-10h, comprising the following materials by mass percentage: 0.1-3.0 of P, 0.1-4.0 of RE2O3 and 0.1-1.5 of Na2O; the pore volume of the modified clay is 0.1-0.5ML/g, the specific surface is 50-400m/g, and the average grain diameter is 0.5-15mu m. The preparation method comprises the following steps: roasting clay at 800-1100 DEG C for 0.3-10h, mixing the roasted clay and deionized water evenly, adding inorganic alkali solution with 0.5-15 mol/L of OH-concentration in the mixture to react at 50-100 DEG C for 0.1-5h and obtaining clay slurry; filtering the clay slurry,,washing the obtained clay slurry by inorganic acid solution at 30-100 DEG C, introducing phosphorus and rare earth by soaking, separating and drying to obtain the modified clay; wherein, the mass ratio of deionized water to clay (dry basis) is 1.5-10, the mass ratio of inorganic alkali solution to clay (dry basis) is 0.5-8, and the inorganic alkali is selected out of one or more of sodium hydroxide, water glass, ammonia and sodium meta-aluminate.

Description

technical field [0001] The invention relates to a modified clay and a preparation method thereof, in particular to a modified clay used in a hydrocarbon catalytic cracking catalyst for heavy oil conversion and a preparation method thereof. Background technique [0002] Catalytic cracking catalyst is a kind of important oil refining catalyst. The content of clay carrier in the preparation of catalytic cracking catalyst can reach more than 50%, which plays an extremely important physical and chemical role. Clay mainly includes kaolinite group, smectite group and sepiolite group, of which kaolinite group accounts for more than 80%. At present, most of the clay carrier fillers of cracking catalysts are protokaolin, which basically has no reactivity. With the increasingly heavy and inferior quality of crude oil worldwide and the urgent requirement of catalytic cracking process to process residual oil, it is hoped that the carrier part of the cracking catalyst has a strong reacti...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J27/18C10G11/02
Inventor 刘从华丁伟王栋蔡进军张志国谭争国孙书红庞新梅潘志爽
Owner PETROCHINA CO LTD
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