A kind of silica-alumina carrier containing molecular sieve and preparation method thereof

A silica-alumina carrier and molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, crystalline aluminosilicate zeolites, etc., can solve the problems of poor selectivity of medium oil, good reactivity, and environmental protection, and achieve high silica-alumina ratio, Effect of small unit cell constant and stable structure

Active Publication Date: 2014-10-08
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst carrier is loaded with metals and applied to the hydrocracking process. The reaction activity is good, but the selectivity of medium oil is slightly poor, and fluorine-containing sewage is produced during the production of modified Y molecular sieve, which pollutes the environment and is not environmentally friendly.

Method used

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  • A kind of silica-alumina carrier containing molecular sieve and preparation method thereof
  • A kind of silica-alumina carrier containing molecular sieve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1. Preparation of modified Y molecular sieve A

[0044] ① Take 250 grams of NH 4 NaY molecular sieve (produced by Wenzhou Catalyst Factory, SiO 2 / Al 2 O 3 The molar ratio is 5.1, the unit cell constant a 0 =2.470nm, the crystallinity is 95%, Na 2 O is 2.3w%, dry basis is 70w%. ) Put it in the heat treatment furnace, control the heating rate of 500℃ / hour, increase the temperature to 600℃ while maintaining the water vapor pressure of the system at 0.15MPa, treat for 2.0 hours, cool down, and take out the sample.

[0045] ②Use NH 4 + And H + 1500ml of the solution (mixed solution of ammonium chloride and hydrochloric acid) with the concentration of 2.0mol / L and 0.2mol / L respectively was in contact with the sample and stirred, maintaining the slurry temperature at 90℃, constant temperature for 1.5 hours, repeat the treatment once under the same conditions, filter Wash the cake with water.

[0046] ③Place the wet cake in a heat treatment furnace, raise the temperature to ...

Embodiment 2

[0048] Example 2. Preparation of modified Y molecular sieve B

[0049] ①Put 2kg NH 4 NaY molecular sieve (same as Example 1) was placed in a heat treatment furnace, the temperature was raised to 630°C within 2 hours, steam was injected (the steaming rate was 3.0kg / h0, and the system pressure was maintained at 0.1MPa, at a constant temperature of 650°C After 3.5 hours, cool down and take out the sample;

[0050] ②Add 15kg of water into the autoclave, industrial NH 4 NO 3 2.4kg, HNO 3 0.2kg and the zeolite sample after the first heat treatment, seal, start stirring, raise the temperature to 120℃, treat at a constant temperature for 1 hour, and treat the filter cake again under the same conditions, filter out the mother liquor, and dry to the water content of the filter cake ≯25 %.

[0051] ③The sample is placed in a heat treatment furnace under the same conditions as step ① for secondary hydrothermal treatment, in which the hydrothermal treatment temperature is 650°C and the hydrother...

Embodiment 3

[0053] Example 3. Preparation of modified Y molecular sieve C

[0054] ①300g NH 4 NaY molecular sieve (same as Example 1) was placed in a heat treatment furnace, the temperature was raised to 560°C in 1 hour, the pressure was maintained at 0.1 MPa by the water vapor of the zeolite, the temperature was kept constant for 3 hours, and the temperature was lowered, and a zeolite sample was taken out.

[0055] ②Use NH 4 + And H + 200ml of the solution (mixed solution of ammonium nitrate and nitric acid) with the concentration of 2.0mol / L and 0.15mol / L respectively was in contact with the sample and stirred, the temperature was raised to 90℃, and maintained for 2 hours, repeated twice, the filter cake was cleaned Wash with water and dry.

[0056] ③The sample is placed in the heat treatment furnace, the temperature is raised to 680℃ within 1.5 hours, and 300g / h of water vapor is introduced at the same time, the pressure of the control system is 0.1±0.02MPa, the temperature of the control sys...

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Abstract

The invention discloses a silicon-aluminium carrier comprising a molecular sieve and a preparation method thereof. The silicon-aluminium carrier is prepared from 5 weight percent to 50 weight percent of a modified Y molecular sieve and 50 weight percent to 95 weight percent of amorphous silicon-aluminium; and the silicon-aluminium carrier has a BET specific surface area of 260 to 400m<2> / g and a pore volume of 0.50 to 0.95ml / g. The preparation method of the silicon-aluminium carrier comprises the following steps of: (1) mixing a silicon source and an aluminium source which are used for preparing the amorphous silicon-aluminium, and then adding a precipitating agent under the stirring condition to obtain a gelatinous mixture; (2) adding the modified Y molecular sieve into the gelatinous mixture to carry out aging; (3) filtering aged slurry to obtain a filter cake and carrying out drying, lamination and extrusion forming on the filter cake; and (4) sequentially carrying out washing, steam processing, drying and roasting on the product obtained after extrusion forming so as to obtain the silicon-aluminium carrier.

Description

Technical field [0001] The invention relates to a hydrocracking catalyst carrier and a preparation method thereof, in particular to a silica-alumina carrier containing molecular sieve and a preparation method thereof. Background technique [0002] Hydrocracking is a conversion process in which heavy feedstock oil undergoes hydrogenation, desulfurization, denitrification, structural rearrangement and cracking of hydrocarbon molecules in the presence of high temperature and high pressure hydrogen and catalysts. Hydrocracking technology has the advantages of strong raw material adaptability, good product quality, high middle distillate yield, and high added value of tail oil. The hydrocracking catalyst is a dual-functional catalyst composed of hydrogenation components and acidic components, and its cracking activity comes from the acidity of the carrier. The raw material for hydrocracking is mainly vacuum distillate (VGO), the distillation range is generally 350-550 ℃, the carbon n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/24B01J29/08
Inventor 齐邦峰陈淳刘丽芝吴晶晶
Owner CHINA NAT OFFSHORE OIL CORP
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