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Method for preparing mixed metal catalyst

A technology of mixing metals and catalysts, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as low metal recovery rate and environmental pollution of metal-containing filtrate

Active Publication Date: 2015-02-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the catalyst prepared by this preparation method has high hydrogenation activity, there are still some disadvantages: (1) the metal recovery rate is low; (2) the discharge of the metal-containing filtrate will cause environmental pollution

Method used

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  • Method for preparing mixed metal catalyst
  • Method for preparing mixed metal catalyst
  • Method for preparing mixed metal catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (Comparative metal mixture): Weigh 1 mol of basic nickel carbonate, 0.1 mol of ammonium heptamolybdate, and 0.1 mol of ammonium metatungstate, add appropriate amount of water to dissolve ammonium heptamolybdate and ammonium metatungstate respectively, and then add them to the crystallization kettle Stir evenly, then add basic nickel carbonate, polyacrylamide with 1% of the total weight of the metal mixture, and finally replenish water until the total water addition is 2.5L, seal the crystallization kettle, react at 100°C for 3h, filter, dry, After milling a comparative metal mixture was obtained.

Embodiment 2

[0020] The filtrate obtained in Example 1 and the metal mixture were used to prepare a seed crystal solution, wherein 0.5% of the total weight of the pre-synthesized metal mixture was added as the seed crystal. Weigh 1 mol of basic nickel carbonate, 0.1 mol of ammonium heptamolybdate, and 0.1 mol of ammonium metatungstate, respectively add ammonium heptamolybdate and ammonium metatungstate to the seed crystal solution and stir evenly, then add to the crystallization kettle, and then add alkali Formula nickel carbonate, polyacrylamide of 1% of the total weight of the metal mixture, finally add all the filtrate, add an appropriate amount of deionized water to ensure that the total volume of the solution is the same as in Example 1, seal the crystallization kettle, react at 100 ° C for 3 hours, and filter , dried, and ground to obtain a metal mixture.

Embodiment 3

[0022] The filtrate obtained in Example 1 and the metal mixture were used to prepare a seed crystal solution, wherein 1% of the total weight of the pre-synthesized metal mixture was added as the seed crystal. Weigh 1 mol of basic nickel carbonate, 0.1 mol of ammonium heptamolybdate, and 0.1 mol of ammonium metatungstate, respectively add ammonium heptamolybdate and ammonium metatungstate to the seed crystal solution and stir evenly, then add to the crystallization kettle, and then add alkali Formula nickel carbonate, polyacrylamide of 1% of the total weight of the metal mixture, finally add all the filtrate, add an appropriate amount of deionized water to ensure that the total volume of the solution is the same as in Example 1, seal the crystallization kettle, react at 100 ° C for 3 hours, and filter , dried, and ground to obtain a metal mixture.

[0023] The metal mixture powder obtained in the above examples is mixed with a binder (aluminum sol) and shaped by a molding devic...

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Abstract

The invention relates to a method for preparing a mixed metal catalyst, comprising: adding salts of nickel, molybdenum and tungsten into a crystallization kettle, and reacting under a hydrothermal condition, to obtain a metal mixture; filtrating reaction products, preserving a filtrate for standby use, using filter cakes as inoculating seeds, and mixing the inoculating seeds with the filtrate to obtain an inoculating seed solution; adding salts of nickel, molybdenum and tungsten into a crystallization kettle, adding the inoculating seed solution into the kettle, sealedly reacting in the crystallization kettle under the hydrothermal condition to obtain a metal mixture, filtrating the reaction products, continuously using the filtrate to prepare the inoculating seed solution, finally reaching zero discharge of the filtrate, and obtaining a mixed metal powder after drying and grinding the filter cakes; and forming a mixture of the metal powder and a binder by forming equipment, and obtaining a catalyst finished product after drying and roasting. The catalyst is used for ultra-deep hydrodesulfurization reaction for diesel oil, has very high hydrogenation activity. In a metal oxide synthesis process, a product yield is raised, and zero discharge of the metal filtrate is implemented.

Description

technical field [0001] The invention relates to a preparation method of a mixed metal catalyst, which is an improved technology for the preparation method of a diesel ultra-deep hydrogenation desulfurization catalyst. Background technique [0002] As the society's requirements for the oil refining industry gradually extend from the clean production process to the production of environmentally friendly products, the quality of vehicle fuel will change from the current conventional vehicle fuel to low-emission clean fuel and ultra-low-emission ultra-clean fuel In the direction of development, all countries in the world require to continuously reduce the content of sulfur and aromatics in gasoline and diesel for vehicles; countries such as the European Union, the United States and Japan implement ultra-low sulfur diesel standards, which require the sulfur content of diesel for vehicles to be limited to 10-15ppm level. [0003] In response to the continuous improvement of clean...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888B01J37/00C10G45/08
Inventor 崔德强赵悦贺新陈世安殷长龙
Owner PETROCHINA CO LTD
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