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Preparation method of hydrotreating catalyst

A hydrogenation treatment and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of carrier specific surface area loss, corrosive channels, pore structure damage, etc., and achieve improved pressure crushing strength, improving denitrification activity, and slowing down corrosion

Inactive Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, using nitric acid as a binder is easy to corrode the pores and cause damage to the pore structure. Secondly, nitric acid is easy to corrode the equipment and pollute the environment during the roasting process. Furthermore, repeated roasting tends to cause a large loss of the specific surface area of ​​the carrier.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This example introduces the preparation method of Mo, Ni, P original solution. In this example, only one original solution of Mo, Ni, and P with one concentration and ratio is prepared, and solutions with other ratios and concentrations can be prepared according to the method introduced.

[0035] Take 386g of molybdenum oxide and 123g of basic nickel carbonate into a multi-necked flask, add a certain amount of deionized water, stir until the substance in the bottle is slurry, then slowly add 86g of phosphoric acid, and then heat slowly after the initial reaction , keep the solution temperature at 90°C to 110°C for 1h to 3h. After the heating was stopped, the obtained solution was filtered while it was hot, and after some insoluble impurities were filtered out, a clear dark green original solution was obtained. The solution composition is MoO 3 NiO: 69.27g / 100mL; NiO: 12.49g / 100mL; P: 4.10g / 100mL.

Embodiment 2

[0037] Beat 200g of refined aluminum hydroxide with 200g of deionized water for 30 minutes, add 300g of concentrated phosphoric acid (concentration 85%) into the slurry while stirring, raise the temperature to 75°C, and then react at this temperature for 45 minutes to obtain colorless Transparent phosphorus-containing aluminum sol, its pH value is 2.8. After analysis, the phosphorus-containing aluminum sol contains 11.5% by weight of P, 9.9% by weight of Al, and a weight ratio of P / Al of 1.2.

[0038] Dry mix 230g of macroporous alumina (70% on dry basis) and 15g of small-pore alumina (75% on dry basis) for 5 minutes, then add 35g of the above-mentioned binder, 220g of water, 4g of turnip powder and 4g of citric acid Knead to become a plastic body, then extrude into a four-leaf clover with a diameter of 1.2mm on an extruder, dry at 120°C for 3 hours, and bake at 450°C for 3 hours to obtain the carrier ZT-1; -Ni-P impregnation solution impregnated the carrier to obtain catalys...

Embodiment 3

[0040] Beat 92g pseudo-boehmite with 200g deionized water for 30 minutes, add 300g concentrated phosphoric acid (concentration 85%) into the slurry while stirring, raise the temperature to 80°C, and then react at this temperature for 50 minutes to obtain colorless Transparent phosphorus-containing aluminum sol, its pH value is 2.5. After analysis, the phosphorus-containing aluminum sol contained 13.6% by weight of P, 6.2% by weight of Al, and a weight ratio of P / Al of 2.2.

[0041] Dry mix 230g of pseudo-boehmite (70% on a dry basis) and 15g of small-pore alumina (75% on a dry basis) for 5 minutes, then add 30g of the above binder, 220g of water, 4g of kale powder and 4g of citric acid Carry out kneading to become a plastic body, then extrude into a four-leaf clover with a diameter of 1.2mm on an extruder, dry at 110°C for 4 hours, and bake at 500°C for 2.5 hours to obtain carrier ZT-2. The Mo-Ni-P impregnating solution impregnated the carrier to obtain the catalyst CT-2, and...

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PUM

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Abstract

The invention discloses a preparation method of a hydrotreating catalyst. The method consists of: first pulping aluminum hydroxide or alumina into a slurry, adding concentrated phosphoric acid to react so as to obtain a sol; then taking the sol as a binder, kneading the sol with large hole alumina and small hole alumina, and conducting shaping, drying and roasting to obtain an alumina carrier; and then steeping the alumina carrier with an active metal component steeping solution, and carrying out drying and roasting so as to obtain the hydrotreating catalyst. In the invention, phosphorus is introduced into the alumina carrier in the form of a binder, and can play a structural assistant role to improve the active metal dispersity on the alumina carrier. The weak acid amount of the carrier is increased, the amount of strong-medium acid is decreased, and the total acid amount is reduced. Particularly, the corrosive effect of the phosphorus-containing binder on an alumina carrier frame is greatly mitigated, the pore structure and mechanical strength of the alumina carrier and the catalyst can be significantly improved, meanwhile, consumption of the phosphorus-containing sol binder is low, and the preparation process is environment-friendly and pollution-free.

Description

technical field [0001] The invention relates to a preparation method of a hydrogenation treatment catalyst, in particular to a preparation method of a wax oil hydrogenation treatment catalyst. Background technique [0002] Crude oil and distillates derived from crude oil contain impurities such as sulfur, nitrogen, oxygen and metals. The existence of these impurities not only affects the stability of the oil, but also emits SO during use. X , NO X and other harmful gases pollute the environment. During the secondary processing of oil products, the presence of impurities such as sulfur, nitrogen, oxygen and metals can poison catalysts. Therefore, removing the above-mentioned impurities is an important process in oil processing. Distillate oil hydrotreating refers to the process of contacting raw oil and hydrogen with a catalyst at a certain temperature and pressure to remove impurities and saturate aromatics. [0003] It is well known that the pore structure of the catal...

Claims

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Application Information

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IPC IPC(8): B01J27/19C10G45/08
Inventor 吕振辉彭绍忠王刚袁胜华
Owner CHINA PETROLEUM & CHEM CORP
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