A kind of hydrated alumina and preparation method thereof

A hydrated alumina and pseudo-boehmite technology, applied in the direction of alumina/aluminum hydroxide, can solve the problems of increased production costs, limited pore expansion, and failure to reach the hydrogenation catalytic cracking treatment process, and achieve good Hole expansion ability, effect of improving hole structure

Active Publication Date: 2011-11-30
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the pore-enlarging effect of physical or chemical pore-enlarging agents is limited, the pore structure of the alumina carrier prepared by adding physical or chemical pore-enlarging agents to conventional pseudo-boehmite Still not up to the requirements of hydrocatalyti

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of hydrated alumina and preparation method thereof
  • A kind of hydrated alumina and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] The present invention also provides a method for preparing hydrated alumina, the method comprising contacting sodium metaaluminate and / or sodium aluminate with an acidic solution, and aging the mixed slurry obtained after the contact reaction in the presence of an aging agent The conditions of the contact reaction include: the reaction pH value is 4.5-9, and the reaction temperature is 15-75°C; the aging conditions include: the temperature is 20-60°C, and the time is 2-6 hours; the aging agent Ammonium carbonate and / or ammonium bicarbonate.

[0014] In the preparation method of the hydrated alumina provided by the present invention, sodium metaaluminate and / or sodium aluminate are contacted with an acidic solution for reaction, and then the mixed solution obtained after the reaction is mixed with ammonium carbonate and / or ammonium bicarbonate Mixing is carried out for aging, and by controlling the conditions of the contact reaction and the adjustment of aging within the...

Embodiment 1

[0023] This example is used to illustrate the hydrated alumina and its preparation method provided by the present invention.

[0024] Take by weighing 483 grams of aluminum chloride (purchased from Beijing Chemical Plant), add to deionized water and dissolve to make a concentration of 1 mol / liter solution a1; weigh 210 grams of sodium metaaluminate (purchased from Tianjin Jin Department of Fine Chemical Industry Research Institute), added to deionized water and dissolved to make a concentration of 3.0 mol / liter solution b1; 230 grams of ammonium carbonate (purchased from Beijing Chemical Reagent Company) was weighed, added to deionized water and dissolved to prepare into a solution c1 with a concentration of 0.5 mol / L. The solution a1 and the solution b1 are simultaneously added into a 10-liter gelation tank in parallel flow for reaction, and the pH value in the gelation tank is maintained at 8.5 by controlling the inflow speed of the solution a1 and the solution b1, The reac...

Embodiment 2

[0028] This example is used to illustrate the hydrated alumina and its preparation method provided by the present invention.

[0029]Take by weighing 666 grams of aluminum sulfate (purchased from Beijing Chemical Plant), add to deionized water and dissolve to make a concentration of 0.5 mol / liter solution a2; weigh 210 grams of sodium metaaluminate (purchased from Tianjin Jinke Institute of Fine Chemicals), added to deionized water and dissolved to make a concentration of 2.0 mol / liter solution b2; 370 grams of ammonium bicarbonate (purchased from Beijing Chemical Reagent Company) was weighed, added to deionized water and dissolved to prepare into a solution c2 with a concentration of 1.0 mol / L. The solution a2 and the solution b2 are simultaneously added to a 10-liter gelation tank in parallel flow for reaction, and the pH value in the gelation tank is maintained at 6.0 by controlling the inflow speed of the solution a2 and the solution b2, The reaction temperature was 40°C....

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention provides a hydrated alumina containing pseudo-boehmite, wherein the hydrated alumina further contains basic aluminum ammonium carbonate. The present invention also provides a method for preparing hydrated alumina, the method comprising contacting sodium metaaluminate and/or sodium aluminate with an acidic solution, and aging the mixed slurry obtained after the contact reaction in the presence of an aging agent The conditions of the contact reaction include: the reaction pH value is 4.5-9, and the reaction temperature is 15-75°C; the aging conditions include: the temperature is 20-60°C, and the time is 2-6 hours; the aging agent Ammonium carbonate and/or ammonium bicarbonate. The alumina carrier prepared by using the hydrated alumina prepared by the method for preparing hydrated alumina according to the present invention has significantly improved most probable pore diameter, average pore diameter, pore volume and pore volume with a diameter of 10-60 nanometers.

Description

technical field [0001] The invention relates to a hydrated alumina and a preparation method of the hydrated alumina. Background technique [0002] Pseudo-boehmite, as the precursor of alumina, can be calcined at a certain temperature to generate activated alumina. Activated alumina has excellent properties such as good thermal stability, certain activity, suitable pore structure, suitable specific surface area, high mechanical strength, etc., and has become the carrier of various catalysts in the petrochemical industry, especially hydrogenation catalysts Carrier. [0003] Heavy oil hydrogenation technology is an effective way for refineries to improve economic efficiency and realize efficient and clean energy utilization, and has attracted widespread attention. Heavy oil, especially low-quality residual oil with high metal content, has the characteristics of large molecules and many impurities and scales. The carrier materials used in heavy oil hydrogenation catalysts requ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01F7/02
Inventor 刘滨杨清河曾双亲胡大为聂红
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap