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Hydrogenation protective agent and preparation method thereof

A hydrogenation protection agent and catalyst technology, applied in catalyst protection, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of poor catalyst strength, difficult combination, and uneven mixing of crystal particles And other issues

Active Publication Date: 2018-11-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the active metal compound and aluminum hydroxide dry rubber powder or alumina powder are directly mixed and formed by kneading method. This method has problems such as uneven mixing of crystal particles and deterioration of catalyst strength. It is not easy to combine with each other to form a specific skeleton structure

Method used

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  • Hydrogenation protective agent and preparation method thereof
  • Hydrogenation protective agent and preparation method thereof
  • Hydrogenation protective agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] (1) Preparation of nickel-containing carrier

[0066] Dilute 1L concentration to 50g Al 2 o 3 / L of aluminum sulfate solution and the prepared nickel nitrate solution are mixed evenly and packed into a high-position container, and the prepared concentration is 75g Al 2 o 3 / / L sodium metaaluminate solution 2L is put into a container at a high position, and the two containers are connected with a peristaltic pump to control the flow rate and flow into a stainless steel container with a stirrer equipped with 1L of bottom water and the bottom of the tank can be fed into the gas, the reaction temperature 60°C, control the flow rate to adjust the pH value of the reaction system to 9.2, adjust the pH value of the slurry to 9.4 by dropping ammonia water, age for 25 minutes after the reaction, filter and separate the mother liquor, and wash. Dry at 90°C for 3 hours and at 120°C for 2 hours to obtain nickel-containing pseudo-boehmite. Weigh the prepared nickel-containing pse...

Embodiment 2

[0075] (1) Preparation of nickel-containing carrier

[0076] Concentrate 4L to 50g Al 2 o 3 The / L sodium metaaluminate solution is placed in a stainless steel container with a stirrer and the bottom of the tank can be ventilated with gas. The nickel nitrate solution is prepared and placed in a high-level container, and the flow rate is controlled by a peristaltic pump. Introduce the mixed gas of carbon dioxide and air, and drop the prepared nickel nitrate solution at the same time, the concentration of carbon dioxide in the mixed gas is 70v%, and the flow rate is 3Nm 3 / h. The reaction temperature is 35°C, the pH value at the end of the reaction is 9.5, stop feeding carbon dioxide, age for 45 minutes, filter and separate the mother liquor, wash, and dry to obtain nickel-containing pseudo-boehmite. Weigh the prepared nickel-containing pseudo-boehmite, mix and knead it with lithium carbonate, nitric acid, citric acid, scallop powder and water to form a plastic body, extrude ...

Embodiment 3

[0085] (1) Preparation of nickel-containing carrier

[0086] Concentrate 3L to 70g Al 2 o 3 / L of sodium metaaluminate solution is placed in a stainless steel container with a stirrer and gas can be introduced into the bottom of the tank, and a mixed gas of carbon dioxide and air is introduced. The concentration of carbon dioxide in the mixed gas is 60v%, and the flow rate is 3Nm 3 / h. The reaction temperature was 35° C., the pH value at the end of the reaction was 10, and the introduction of carbon dioxide was stopped. Under the condition of stirring with air, add 1L of nickel nitrate solution with a concentration of 5.2g NiO / L. After stabilizing for 30 minutes, adjust the pH value of the slurry to 9.5 by adding ammonia water dropwise. After the reaction is completed, age for 30 minutes, filter and separate the mother liquor, wash and dry , to obtain nickel-containing pseudo-boehmite. Weigh the prepared nickel-containing pseudo-boehmite, mix and knead it with nitric acid, ...

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Abstract

The invention relates to a hydrogenation protective agent and a preparation method thereof. The catalyst contains an active component molybdenum, nickel-containing alumina is used as a carrier, a precursor of the nickel-containing alumina carrier is nickel-containing pseudo-boehmite, and the preparation process of the nickel-containing pseudo-boehmite includes acid-base neutralization and gellingprocesses. A specific carrier is used in the protective agent provided by the invention, and the specific carrier has the advantages that the nickel and the pseudo-boehmite can be organically combined, so that the active component nickel is effectively dispersed in the pspseudo-boehmite, and a specific crystal form of the nickel-containing alumina is formed; the method has a good regulation effecton a pore structure and acidity of the carrier, and has the advantages of simple process and easy of adjusting the performance of the carrier material compared with the preparation of the catalyst only through an impregnation method. The hydrogenation protective agent provided by the invention has better capacities of hydrogenation, containing gel and dirt and good chemical stability and thermalstability, and can effectively protect the primary hydrogenation catalyst and prolong the service life of the primary catalyst.

Description

technical field [0001] The invention relates to a hydrogenation protecting agent and a preparation method thereof, in particular to a preparation method of a hydrogenation protecting agent with nickel-containing alumina as a carrier. Background technique [0002] Technically speaking, there are many reasons for the shutdown of the hydrotreating unit, but the main reasons are catalyst deactivation and excessive bed pressure drop. Particulate matter in the hydrotreated feedstock, including gums and coke precursors, deposits between the catalyst particles. Sediments, etc. will cause the pressure drop of the bed to rise, and only occur at the top of the reactor that first contacts with the raw material, and because the particles contain a certain amount of dirt and metal particles. In particular, a small amount of iron contained in raw oil will immediately generate colloidal iron sulfide once it encounters hydrogen in the presence of sulfur. These colloidal iron sulfides are at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883B01J23/887B01J33/00C10G45/08
CPCC10G45/08B01J23/883B01J23/8872B01J33/00C10G2300/70B01J35/613B01J35/633B01J35/615
Inventor 胡晓丽钱颖常晓昕孙利民马好文郑云弟王斌展学成梁顺琴潘曦竹李平智谢培思蔡小霞
Owner PETROCHINA CO LTD
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