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Alumina (γ-Al2O3) Microspheres

Release time:2019-10-09 17:04:36


Product use: catalyst, catalyst carrier, gas and liquid desiccant, gas purification adsorbent, drinking water defluoridation agent, industrial sewage color and odor eliminating agent.
Existing preparation techniques and problems: The existing alumina microsphere preparation process is as follows:
  raw material Disadvantage
1、Spray drying Mixture of alumina powder and aluminum sol Uniform particle distribution, single product
2、Rolling ball Mixture of alumina powder and aluminum sol Large particle size, single product
3、Oil column forming
a mixture of aluminum sol and gelling agent,
An organic amine is dissolved in the oil column as an auxiliary gelling agent.
Severe energy consumption, ammonia corrosion equipment generated in the process, single product
The present technology and features: The technology uses an industrial grade aluminum sol as an aluminum source, and uses a special curing agent (about 10 wt%) to prepare alumina microspheres using a microfluidic molding technique.
The technical features are:
Product microsphere size is uniform
High product packing density
Production can be adjusted flexibly
Can prepare a variety of microspheres from solid to hollow
Microsphere size can be adjusted between 50 microns and 2 mm by process parameters and microfluidic device channel size
Performance comparison between industrial alumina microspheres and alumina microspheres prepared by this process
index Industrial alumina microspheres Alumina microspheres prepared by the present technology
Particle size mm 0.5 ~ 10 0.05 ~ 10
Kong Rong cm3/g 0.35 ~ 0.4 0.4 ~ 0.7
Aperture nm ---- 9 ~ 15
Specific surface area m2/g 150 ~ 300 160 ~ 180
Bulk density g/cm3 0.5 ~ 0.7 0.9 ~ 0.95
 Hollow microsphere Solid microsphere