Oil ammonia column shaping method of spherical aluminium oxide

A spherical alumina and molding method technology, applied in the fields of aluminum hydroxide preparation, chemical instruments and methods, aluminum oxide/aluminum hydroxide, etc., can solve the problems of ammonia water phase, oil phase turbidity, gel particles containing impurities, and oil phase properties Changes and other issues to achieve the effect of avoiding ion pollution

Inactive Publication Date: 2004-05-05
CHINA PETROLEUM & CHEM CORP +1
View PDF3 Cites 42 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the introduction of surfactants can easily cause oil-water emulsification, resulting in turbidity of the ammonia-water phase and oil phase, and changes in the properties of

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

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Get 100 grams of SB70 powder (pseudo-boehmite) produced by German SASOL company, slurry it with 140 grams of deionized water, add 60 grams of nitric acid with a concentration of 5.0% by weight for peptization, and add 20 grams of urea as a viscosity stabilizer to make The aluminum sol with a solid content of 23% by weight is ready for use.

[0020] In a 1.5-meter-long, 70-mm-diameter oily ammonia column, add n-heptane at 20°C as the oil phase, with a height of 1 mm, and the viscosity of n-heptane (20°C) as 0.41 centipoise, and add 8% ammonia water as the water phase , with a height of 149.5 cm. Use a pump or a U-shaped pipe connector to control the oil level and keep it stable. Pour the aluminum sol into a ball dropper located above the oil ammonia column, and the pinhole at the bottom of the ball dropper is 2 cm from the oil surface. at 22 drops / cm 2 Dropping the aluminum sol into the oil-ammonia column at a drop rate of 1 minute, the sol particles form balls in the...

example 2

[0024] Prepare gamma-Al by the method for example 1 2 o 3 The difference is that the height of the oil phase n-heptane is 2 mm, and the pinhole at the bottom of the ball dropper is 3 cm from the oil surface.

example 3

[0026] Prepare gamma-Al by the method for example 1 2 o 3 The difference is that the oil phase is n-octane, the viscosity (20° C.) is 0.55 centipoise, and the pinhole at the bottom of the ball dropper is 2.2 centimeters away from the oil surface. The impurity content is shown in Table 1.

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

A process for preparing spherical alumina by oil-ammonia column includes dripping the alumina sol in the oil-ammonia column composed of upper oil phase and lower electrolyte solution phase to generate spherical gel particles, ageing in electrolyte solution for 0.5-10 hr, drying and calcining. Its advantage is high purity.

Description

technical field [0001] The invention relates to an oily ammonia column forming method for spherical solid particles, specifically, a method for preparing alumina spherical particles by using the oily ammonia column method. Background technique [0002] The oil ammonia column forming method is a common method for preparing alumina, silicon oxide, silicon aluminum and other pellets. It is to drop the sol into the oil ammonia column, so that the sol particles form balls in the oil phase of the upper layer of the column, and gel in the ammonia water of the lower layer. After aging, the gelled particles are dried and calcined to obtain spherical solid particles. The pellets prepared by this method have uniform structure, low wear and high strength, and are widely used as fixed bed and moving bed catalysts, catalyst carriers, and adsorbents. [0003] USP4179408 discloses a method for preparing spherical alumina. In this method, aluminum sol droplets first enter the upper phase o...

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): B01J21/04B01J32/00B01J35/08B01J35/10C01F7/02C01F7/34
Inventor 王国成潘锦程马爱增
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