Deep sealumination modified Y zeolite preparation method

A zeolite and dealumination technology, which is applied in the direction of crystalline aluminosilicate zeolite, octahedral crystalline aluminosilicate zeolite, chemical instruments and methods, etc., can solve the problem of insufficient crystallinity and surface area of ​​dealuminated Y zeolite, and achieve high-quality medium oil Effects of selectivity, small unit cell constant, and large surface area

Active Publication Date: 2007-04-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dealuminated Y zeolite prepared by this method has insufficient crystallinity and surface area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Take 50 grams of NH 4 NaY zeolite (produced by Wenzhou Catalyst Factory, SiO 2 / Al 2 o 3 Molar ratio is 5.1, unit cell constant a 0 =2.470, crystallinity is 95%, Na 2 O is 2.3w%, dry basis is 70w%. ) in a heat treatment furnace, control the temperature rise rate of 500°C / hour, raise the temperature to 600°C, and maintain the water vapor pressure of the system at 0.15MPa, treat for 2.0 hours, cool down, and take out the sample. with NH 4 + and H +300ml of solutions (mixed solution of ammonium chloride and hydrochloric acid) with a concentration of 2.0mol / L and 0.2mol / L were contacted with the sample and stirred to maintain the temperature of the slurry at 90°C for 1.5 hours at a constant temperature. Repeat the treatment once under the same conditions, filter Wash the cake with water; place the wet filter cake in a heat treatment furnace, raise the temperature to 650°C, control the water vapor pressure to 0.20MPa, keep the temperature constant for 3 hours, cool d...

example 2

[0022] Take 50 grams of NH 4 NaY zeolite (same as Example 1) was placed in a heat treatment furnace, controlled at a heating rate of 500°C / hour, the temperature was raised to 650°C, while maintaining the partial pressure of water vapor in the system at 0.05MPa, treated for 3.0 hours, cooled, and the sample was taken out; with NH 4 + and H + 300ml of the solution (mixed solution of ammonium nitrate and nitric acid) with a concentration of 1.0mol / L and 0.1mol / L respectively was in contact with the sample and stirred to maintain the temperature of the slurry at 120°C for 1.0 hour. Repeat the treatment once under the same conditions, and the filter cake Wash with water; place the wet filter cake in a heat treatment furnace, raise the temperature to 750°C, and control the water vapor pressure in the furnace to 0.05MPa, keep the temperature constant for 3 hours, cool down, and take out the sample; finally use 200ml of the sample with a concentration of 0.3mol / L The non-skeletal a...

example 3

[0024] ① Put 2kg NH 4 NaY zeolite (same as example 1) is placed in the heat treatment furnace, the temperature is raised to 650°C in 2 hours, inject water vapor (same steam rate 3.0kg / h), and keep the system pressure at 0.1MPa, constant temperature at 650°C After 3.5 hours, cool down and take out the sample;

[0025] ② Add 15kg of water to the autoclave, industrial NH 4 NO 3 2.4kg, HNO 3 3.2kg and the zeolite sample after the first heat treatment, seal it, start stirring, raise the temperature to 120°C, treat it at a constant temperature for 1 hour, treat the filter cake again under the same conditions, filter off the mother liquor, and dry until the water content of the filter cake ≯25 %.

[0026] ③ The sample is placed in a heat treatment furnace under the same conditions as step ① for a second hydrothermal treatment, wherein the hydrothermal treatment temperature is 680°C and the hydrothermal treatment time is 3 hours.

[0027] ④ The zeolite sample was chemically dea...

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Abstract

The invention discloses a preparing method of deep aluminium-stripping Y-zeolite, which comprises the following steps: adopting NH4NaY with the content of Na2O not more than 2.5w%; proceeding first water heat disposal; utilizing high-density H+ ammonium salt solution to exchange to strip aluminium; proceeding second water heat disposal; removing non-frame aluminium through acid solution; setting the disposing temperature of second water heat disposal higher than the first one; improving crystallinity and silicon-aluminium rate with abundant secondary hole.

Description

technical field [0001] The invention relates to a preparation method of deep dealumination Y zeolite, in particular to a preparation method of deep dealumination Y zeolite used for the cracking component of high-medium oil type hydrocracking catalyst. Background technique [0002] The high-medium oil type hydrocracking catalyst requires high medium-oil selectivity, and the use of amorphous silica-alumina as the main carrier of the acidic component is beneficial to improve the medium-oil selectivity of the catalyst, but the cracking activity of the catalyst is very low, resulting in the reaction Temperature is too high. To make the medium oil type hydrocracking catalyst have good medium oil selectivity and high activity, as the acid cracking component of the catalyst, modified zeolite is the key. Therefore, part of the framework aluminum is selectively removed to reduce the acid center density of zeolite, and abundant secondary pores are obtained through advanced treatment t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24B01J29/08C10G45/12
Inventor 阮彩安
Owner CHINA PETROLEUM & CHEM CORP
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