Hydrated alumina molded matter and preparation method thereof, alumina molded matter and applications of hydrated alumina molded matter and alumina molded matter

A technology of alumina moldings and hydrated alumina, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as unfavorable environmental protection and unhealthy operators, and achieve environmental benefits Protection, reduction of impact on operator health, effect of good absorption properties

Active Publication Date: 2014-01-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Also, acids (for example: nitric acid, citric acid, oxalic acid, acetic acid, formic acid, malonic acid, hydrochloric acid and trichloroacetic acid) are usually used as peptizers. A large amount of acid gas is released during the process, which is not only harmful to the health of operators, but also not conducive to environmental protection

Method used

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  • Hydrated alumina molded matter and preparation method thereof, alumina molded matter and applications of hydrated alumina molded matter and alumina molded matter
  • Hydrated alumina molded matter and preparation method thereof, alumina molded matter and applications of hydrated alumina molded matter and alumina molded matter
  • Hydrated alumina molded matter and preparation method thereof, alumina molded matter and applications of hydrated alumina molded matter and alumina molded matter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] (1) 100.0g of pseudo-boehmite powder (purchased from Sinopec Catalyst Changling Branch, with a dry basis content of 69.5% by weight), 4.0g of methylcellulose (purchased from Zhejiang Haishen Chemical Co., Ltd.), 3.0g Tianjing powder, 20.0g ultra-stable Y molecular sieve (purchased from Sinopec Catalyst Changling Branch, unit cell constant is Dry basis content is 95% by weight, Na 2 The content of O is 0.05% by weight) and 85g of deionized water are mixed evenly. The resulting mixture is fed into an extruder and extruded to obtain a wet strip. The extruded wet strip was placed in an oven and dried at 150° C. for 12 hours to obtain the hydrated alumina molding of the present invention. The radial crushing strength, water absorption rate and δ value of the obtained moldings were measured, and the results are listed in Table 1.

[0069] (2) Dissolve 4.71 g of basic nickel carbonate (NiO content is 51% by weight), 12.0 g of molybdenum oxide and 2.24 g of phosphoric acid ...

Embodiment 2

[0089] (1) In a 2L reaction tank, add 2000mL of aluminum sulfate solution and sodium metaaluminate solution (Al 2 o 3 content of 200g / L, caustic coefficient of 1.58) for precipitation reaction, the reaction temperature is 50°C, the pH value is 6.0, and the reaction residence time is 15 minutes; the obtained slurry is filtered with a vacuum filter. Add 20L of deionized water (at a temperature of 40±5°C) to the filter cake to rinse the filter cake for about 60 minutes. Add the washed filter cake into 1.5L deionized water and stir to form a slurry, then pump the slurry into the spray dryer for drying, control the outlet temperature of the spray dryer within the range of 100-110°C, and the material drying time is 2 minutes to obtain hydrated alumina, wherein, Al 2 o 3 The content is 63% by weight, and it is determined to be amorphous by XRD analysis.

[0090] (2) 50.0g of pseudoboehmite powder (purchased from Sinopec Catalyst Changling Branch, with a dry basis content of 69.5%...

Embodiment 3

[0094] (1) 60.0g of pseudoboehmite (purchased from Sinopec Catalyst Changling Branch, with a dry basis content of 69.5% by weight), 40.0g of gibbsite (purchased from Guangxi Pingguo Aluminum Company, with a dry basis content of 64.5% by weight), 1.0g methyl cellulose (purchased from Zhejiang Haishen Chemical Co., Ltd.), 2.0g hydroxypropyl methylcellulose (purchased from Zhejiang Haishen Chemical Co., Ltd.), 3.0g kale powder, 30.0 g NaY molecular sieve (purchased from Sinopec Qilu Catalyst Company, unit cell constant is Dry basis content is 96% by weight) and 120g of deionized water are stirred evenly. The resulting mixture is fed into an extruder and extruded to obtain a wet strip. The obtained wet strip was placed in an oven and dried at 80° C. for 12 hours to obtain the hydrated alumina molding of the present invention. The radial crushing strength, water absorption rate and δ value of the obtained moldings were measured, and the results are listed in Table 1.

[0095] (...

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Abstract

The invention provides a hydrated alumina molded matter, and a preparation method and an application thereof. The hydrated alumina molded matter is prepared by molding raw materials comprising at least one hydrated alumina, at least one Y molecular sieve and at least one cellulose ether. The water absorption rate of the hydrated alumina molded matter is 0.4-1.5, the delta value is 10% or less, and the Q1 is 12 N/mm or more. The invention also provides an alumina molded matter and an application thereof, wherein the alumina molded matter is prepared by calcination of the hydrated alumina molded matter. The molded matters provided by the invention have high strength and good strength retention rate. According to the method of the invention, a peptizing agent is not used during the molding process.

Description

technical field [0001] The invention relates to a hydrated alumina molding and its preparation method and application, and also relates to an alumina molding and its application. Background technique [0002] Alumina, especially γ-alumina, because of its good pore structure, heat resistance stability, and high specific surface area, alumina moldings are often used as carriers for desiccants or supported catalysts. The properties of alumina can be adjusted by introducing Y molecular sieve into the alumina molding to meet the requirements of specific occasions. For example, the aluminum oxide molding containing Y molecular sieve is used as the carrier to support the active components with hydrogenation catalysis, and the hydrogenation catalysis performance of the prepared catalyst can be adjusted. [0003] The alumina molding containing Y molecular sieve can be prepared by mixing hydrated alumina with water, peptizing agent and optional extrusion aid, and successively perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J32/00B01J29/08
Inventor 曾双亲杨清河刘滨任亮孙淑玲聂红李大东
Owner CHINA PETROLEUM & CHEM CORP
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