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A kind of inert agent for fluidized bed and its preparation and use method

A fluidized bed and inert technology, applied in chemical instruments and methods, chemical/physical processes, etc., can solve the problems of loss, high price, catalyst pollution, etc., and achieve the effect of avoiding side effects, low price, and cheap and easy-to-obtain raw materials

Active Publication Date: 2016-04-13
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the catalysts used in the above-mentioned methanol conversion process are all molecular sieve catalysts, which are expensive, the direct use of industrial catalysts for test runs may lead to unnecessary losses due to improper disposal. At the same time, the cleaning process of newly-built equipment will pollute the catalysts to a certain extent

Method used

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  • A kind of inert agent for fluidized bed and its preparation and use method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 2.86 kilograms of pseudo-boehmite, 6.01 kilograms of kaolin, and 10 kilograms of water. After stirring evenly, add 8.01 kilograms of aluminum sol (20 wt%) and stir for 2 hours. Dissolve 1.41 kg of calcium nitrate and 0.5 kg of starch in 10 kg of water, stir to dissolve completely, add to the above mixture, continue to stir for 3 hours until the mixture is uniform, the material liquid is colloid milled with a colloid mill, so that the particles in the final slurry The position diameter is less than 3 microns, and the slurry is spray-dried to obtain a solid microsphere particle product D1. The product is calcined at 500°C for 7 hours in an air atmosphere to obtain an inert agent for fluidized bed, which is denoted as D1-C.

Embodiment 2

[0023] Disperse 5.74 kg of kaolin in 15 kg of water, stir well, add 2.5 kg of silica sol (30wt%), continue to stir for 30 minutes; disperse 0.1 kg of sesame powder in 10 kg of water, and add it to the aforementioned liquid after being completely dissolved; 0.8 kg of magnesium nitrate, continue to stir for 3 hours until the mixture is uniform. The obtained material liquid is colloid milled with a colloid mill, so that the median diameter of the particles in the finally obtained slurry is less than 3 μm, and the slurry is spray-dried to obtain a solid microsphere particle product D2. The product is calcined at 700°C for 3 hours in an air atmosphere to obtain an inert agent for fluidized bed, denoted as D2-C.

Embodiment 3

[0025] Disperse 2.86 kilograms of pseudo-boehmite in 10 kilograms of water, add 5.81 kilograms of phosphoric acid, stir for 3 hours, then add 6.01 kilograms of kaolin, continue stirring for 1 hour, add 8.01 kilograms of aluminum sol (20wt%), and mix well. Take another 8.06 kg of water, add 0.12 kg of graphite powder and 1.34 kg of magnesium carbonate, stir and mix evenly, add to the aforementioned mixture, and stir for 3 hours until the mixture is uniform. The obtained material liquid is colloidally milled with a colloid mill, so that the median diameter of particles in the finally obtained slurry is less than 3 μm, and the slurry is spray-dried to obtain a solid microsphere particle product D3. The product is calcined at 600°C for 4 hours in an air atmosphere to obtain an inert agent for fluidized bed, which is designated as D3-C.

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Abstract

The invention discloses an inert agent for a fluidized bed as well as preparation and use methods of the inert agent. The inert agent comprises the following components by mass percent: 5-90 percent of matrix, 5-30 percent of adhesives, 0.5-5 percent of a pore volume regulator and 1-15 percent modified metal salt. The inert agent has no or only low catalysis activity but has similar physical properties to the industrial catalysts, is used for cleaning, debugging at the initial period and trial run of a newly-built device, achieves low-cost inspection and cleaning of a device, and simultaneously helps an operator know and familiarize the running and fluidization performance of the catalysts for the fluidized bed.

Description

Technical field [0001] The invention relates to the field of fluidized bed devices, and relates to an inert agent used in a fluidized bed and a preparation and use method thereof. Background technique [0002] Due to the increasing shortage of petroleum resources and rising prices, the development of new coal chemical technology for the production of bulk chemical raw materials by non-petroleum routes has become a hot spot for technological development and investment by domestic and foreign research institutions and major domestic and foreign energy companies. In recent years, coal-based methanol conversion technology has been booming. At the same time, due to its good mass and heat transfer characteristics and continuous regeneration capabilities, the mature fluidized bed reaction technology based on the petroleum route fluidized catalytic cracking technology has also been widely used for reference and applied to a series of methanol conversion technologies. To solve the huge h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/24
Inventor 汪彩彩张军民刘建斌张世刚高力丹张随平罗熙张小虎陈亚妮张亚秦刘军战
Owner SHAANXI COAL & CHEM TECH INST