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Inert agent for fluidized bed as well as preparation and use methods thereof

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

Active Publication Date: 2013-03-13
陕西煤化工技术工程中心有限公司
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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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  • Inert agent for fluidized bed as well as preparation and use methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 2.86 kg of pseudo-boehmite, 6.01 kg of kaolin, and 10 kg of water, stir evenly, add 8.01 kg of aluminum sol (20wt%), 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 evenly mixed, then use a colloid mill to carry out colloid milling of the feed solution, so that the particles in the final slurry The bit diameter is less than 3 microns, and the slurry is spray-dried to obtain 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 a fluidized bed, denoted as D1-C.

Embodiment 2

[0023] Disperse 5.74kg of kaolin in 15kg of water, stir evenly, add 2.5kg of silica sol (30wt%), and continue stirring for 30min; Magnesium nitrate 0.8 kg, continue to stir for 3h to mix evenly. The obtained feed liquid is colloidally 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 the 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 a fluidized bed, denoted as D2-C.

Embodiment 3

[0025] Disperse 2.86 kg of pseudo-boehmite in 10 kg of water, add 5.81 kg of phosphoric acid, stir for 3 hours, then add 6.01 kg of kaolin, continue stirring for 1 hour, add 8.01 kg 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, then add to the aforementioned mixture, stir for 3 hours until the mixture is uniform. The obtained feed liquid is colloidally 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 the 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 a fluidized bed, denoted 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 a fluidized bed device, in particular to an inert agent for 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 through non-petroleum routes has become a hot spot for technology development and investment by domestic and foreign research institutions and major energy companies at home and abroad. In recent years, coal-based methanol conversion technology has developed vigorously. At the same time, due to its good mass and heat transfer characteristics and continuous regeneration capability, the well-developed fluidized bed reaction technology based on the petroleum route fluid catalytic cracking technology has also been widely used for reference and applied to a series of methanol conversion technologies to solv...

Claims

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Application Information

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Patent Type & Authority Applications(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 陕西煤化工技术工程中心有限公司