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Composite molecular sieve-containing medium oil type hydrocracking catalyst, preparation method and application thereof

A composite molecular sieve and hydrocracking technology, which is applied in the field of medium oil hydrocracking catalyst containing composite molecular sieve and its preparation and application, can solve the problems of environmental pollution and insufficient environmental protection, and achieve the advantages of diffusion, stable structure, secondary hole rich effect

Active Publication Date: 2015-07-15
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst is used in the hydrocracking process, and the oil selectivity and reactivity are good. The disadvantage is that fluorine-containing sewage is produced during the production of modified molecular sieves, which pollutes the environment and is not environmentally friendly.

Method used

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  • Composite molecular sieve-containing medium oil type hydrocracking catalyst, preparation method and application thereof
  • Composite molecular sieve-containing medium oil type hydrocracking catalyst, preparation method and application thereof
  • Composite molecular sieve-containing medium oil type hydrocracking catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 500 grams of NH 4 NaY molecular sieve (SiO 2 / Al 2 o 3 Molar ratio is 5.2, unit cell constant a 0 =2.469nm, crystallinity is 93%, Na 2 O is 2.3w%, dry basis is 75w%. ) placed in a heat treatment furnace, treated for 2.0 hours at 600°C and a water vapor pressure of 0.12MPa, cooled down, and the sample was taken out. with NH 4 + and H + 3500ml of mixed solution of ammonium chloride and hydrochloric acid with a concentration of 2.0mol / L and 0.2mol / L was contacted with the sample and stirred, and the temperature of the slurry was maintained at 90°C for 1.2 hours. The same conditions were repeated once, and the filter cake was washed 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 2.5 hours, cool down, and take out the sample; finally remove the sample with 3000ml of hydrochloric acid with a concentration of 0.4mol / L For the non-sk...

Embodiment 2

[0027] ① Put 2kg NH 4 NaY zeolite (same as Example 1) is placed in a heat treatment furnace, the temperature is raised to 630°C, water vapor is injected at a rate of 2.5kg / h, and the system pressure is kept at 0.1MPa, kept at a constant temperature of 650°C for 2.5 hours, then cooled, take out the sample;

[0028] ② Add 15kg of water to the autoclave, industrial NH 4 NO 3 2.4kg, HNO 3 0.2kg and the zeolite sample after the first heat treatment, seal it, start stirring, raise the temperature to 120°C, treat at a constant temperature for 1 hour, treat the filter cake again under the same conditions, filter the mother liquor, and dry until the water content of the filter cake is ≯25 %.

[0029] 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 650°C and the hydrothermal treatment time is 2 hours.

[0030] ④ The zeolite sample was chemically dealuminated...

Embodiment 3

[0032] ①300g NH 4 NaY zeolite (same as in Example 1) was placed in a heat treatment furnace, heated to 560° C., its own water vapor pressure maintained at 0.1 MPa, kept at constant temperature for 2.5 hours, cooled, and a zeolite sample was taken out.

[0033] ② with NH 4 + and H + 200ml of mixed solution of ammonium nitrate and nitric acid with a concentration of 2.0mol / L and 0.15mol / L was contacted with the sample and stirred, the temperature was raised to 90°C and maintained for 1 hour, repeated twice, the filter cake was washed with clean water, dry.

[0034] ③The zeolite sample is placed in a heat treatment furnace, and 300g / h of water vapor is introduced at the same time as the temperature. The pressure of the control system is 0.1±0.02MPa, and the temperature of the control system is 680°C. Keep it for 3 hours, then cool down, and take out the sample.

[0035] ④ Use 200ml of 0.25mol / L hydrochloric acid to remove non-framework aluminum at 95°C for 1 hour on the zeoli...

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Abstract

The invention relates to a composite molecular sieve-containing medium oil type hydrocracking catalyst, which comprises an active component and a binder, wherein the active component adopts amorphous SiO2-Al2O3 as a carrier, adopts a composite molecular sieve as an acid component, and adopts a group VIB metal and a group VIII metal as hydrogenation activity components, and the composite molecular sieve comprises a Y molecular sieve and a ZSM-23 molecular sieve. According to the present invention, the deep dealuminzation modified Y molecular sieve has characteristics of high crystallinity, large surface area, high silica-alumina ratio, low cell constant, rich secondary pore, low acid center density, high moderate-intensity acid center ratio, and the like; the modified ZSM-23 molecular sieve has characteristics of smooth pore channel, less acid center and outstanding isomerism performance, wherein a light naphtha component is isomerized so as to increase an octane number of naphtha; the composite molecular sieve compounded from the Y molecular sieve and the ZSM-23 molecular sieve is adopted as the acid cracking component so as to provide advantages of the Y molecular sieve and the ZSM-23 molecular sieve, and compounding is performed according to the ratio of the present invention, such that the best catalysis effect can be obtained, and the obtained catalyst is suitable for the medium oil type hydrocracking catalyst; and the catalyst prepared from the composite molecular sieve has characteristics of excellent medium oil selectivity, good activity and good stability.

Description

technical field [0001] The present invention relates to a formula of a medium oil type hydrocracking catalyst and its preparation method and application, in particular to a medium oil type hydrocracking catalyst containing a compound molecular sieve of modified Y molecular sieve and modified HZSM-23 molecular sieve and its preparation method and apply. Background technique [0002] At present, the world's oil resources are becoming more and more tense, the crude oil produced by existing oil fields is also becoming heavier and worse, the demand for middle distillate oil is increasing, the upgrading of petrochemical products and stricter environmental protection regulations have greatly promoted the development of heavy oil production. The development of light technology, among them, hydrocracking is an effective means to increase the production of middle distillates. Hydrocracking is a conversion process in which heavy feed oil undergoes hydrogenation, desulfurization, denit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80C10G47/20
Inventor 齐邦峰甘为民孟繁梅
Owner CHINA NAT OFFSHORE OIL CORP
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