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Modified Y zeolite and its preparation method

A zeolite and modification technology, applied in the field of modified Y zeolite and its preparation, can solve the problems of demanding O content, low zeolite acid center density, etc., and achieve good thermal stability, low acid center density, and high specific surface area. Effect

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 zeolite prepared by this method has low acid center density, abundant secondary pore volume, and less crystallinity loss. It is used as an acidic component of a hydrocracking catalyst to treat VGO heavy oil and shows good medium oil selectivity and cracking activity. However, the preparation method for Na of the raw material 2 O content requirements are too harsh

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] (1) NaY zeolite (relative crystallinity 95%, unit cell constant 2.470nm, SiO 2 / Al 2 O 3 The molar ratio is 5.1, Na 2 O content is 11.0w%, produced by Wenzhou Catalyst Factory) mixed with ammonium chloride solution with a concentration of 2.5mol / L, solid-liquid weight ratio is 10, heated to 100℃, ion exchange is carried out for 1.5 hours under stirring, and the mother liquor is filtered out , Repeat the exchange once, filter, and wash the filter cake with deionized water until there is no Cl - After being detected, the filter cake was dried in an oven at 110°C until the water content of the filter cake was 15% to obtain Na 2 Y zeolite sample I with O content of 2.4w% 1 .

[0021] (2) The sample I 1 Placed in a heat treatment furnace, the temperature setting program is: 1.2 hours to 580°C, constant temperature for 4 hours. The hourly flow rate of water vapor is 20% of the sample weight, and the control system pressure is 0.05 MPa until the end of the constant temperature, an...

example 2

[0026] (1) Take 100g of NaY zeolite, stir and exchange with 1.5mol / L 750ml of ammonium acetate at 82°C for 2.0 hours, filter out the mother liquor, repeat the exchange twice, wash the filter cake with 2500ml of deionized water, and then place it in an oven. Dry at 110℃ until the filter cake contains 20% water to obtain sample II 1 .

[0027] (2) Put sample II 1 Place it in a heat treatment furnace, raise the temperature to 600°C within 1 hour, inject water vapor, control the system pressure at 0.15 MPa, and keep the temperature constant for 4 hours. Get Y zeolite sample II 2 .

[0028] (3) Put sample II 2 Contact with 1000ml of mixed solution composed of oxalic acid and ammonium oxalate at 90℃ and stir for 1.0 hour, the concentration of oxalic acid in the mixed solution is 0.22mol / L, the concentration of ammonium oxalate is 2.0mol / L, repeat twice, filter cake uses 2500ml Wash with deionized water to get zeolite sample II 3 .

[0029] (4) Put sample II 3 Use 500ml of 0.2mol / L citri...

example 3

[0032] (1) Add 160kg of industrial NH to the enamel kettle 4 NO 3 (Product of Dalian Chemical Plant, purity>99.9%) and 910L H 2 O, heat to 75°C, add 125kg of NaY zeolite, stir at 92°C for 2 hours, repeat this step twice, filter and wash with water until neutral, and dry at 110°C until the filter cake contains 10% water to obtain Na 2 Y Zeolite Sample III with O content of 2.0w% 1 .

[0033] (2) Zeolite sample III 1 Put it into an internal pressure and external heating rotary heat treatment furnace, heat up to 610℃ in 1.5 hours, and inject water vapor, the water vapor flow rate is 30kg / h, the system pressure is controlled at 0.08MPa, the system temperature is maintained at 610℃, and the heat treatment is 3.5 hours to obtain Y Zeolite Sample III 2 .

[0034] (3) Zeolite sample III 2 Put it into an enamel kettle, add 1000L of a mixed solution containing 0.15mol / L of nitric acid and 1.5mol / L of ammonium nitrate, raise the temperature to 95°C, stir for 2 hours, filter out the mother li...

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Abstract

The invention discloses a modified Y-zeolite and preparing method with molar rate of SiO2 / Al2O3 at 7.0-30, wherein the specific area of Y-zeolite is 700-900m2 / g with cell constant at 2.425-2.445nm; the relative crystallizing degree is not less than 80% with Na2O content not more than 0.25%; the 1.7-10nm second hole is over 45% in the total hole capacitance; the non-frame aluminium is over 30% in the whole aluminium with infrared acid degree at 0.15-0.55mmol / g; the preparing method adopts NaY as raw material to produce the modified Y-zeolite through ammonia exchanging, hydrothermal disposal, non-frame aluminium stripping, hole expanding and secondary hydrothermal disposal.

Description

Technical field [0001] The invention relates to a modified Y zeolite and a preparation method thereof, in particular to a modified Y zeolite used as an acid component of a hydrocarbon cracking catalyst and a preparation method thereof. Background technique [0002] Lightening heavy distillate oil to meet people's energy needs is the direction that refiners have been working hard on. The hydrocracking process has become one of the important means for the lightening of heavy oil, and the performance of the hydrocracking catalyst directly affects the effect of lightening heavy oil. In order to obtain a hydrocracking catalyst with good selectivity and activity, the cracking component of the hydrocracking catalyst usually uses a modified molecular sieve. For hydrocracking catalysts that produce more middle distillates, in order to improve the selectivity of middle distillates, it is usually required that the amount of molecular sieve used in the catalyst be small, the acid center dens...

Claims

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Application Information

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IPC IPC(8): C01B39/24
Inventor 阮彩安
Owner CHINA PETROLEUM & CHEM CORP
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