FIELD: chemistry.
SUBSTANCE: invention can be used in chemical industry. To obtain spheroidal alumina particles suspension is prepared, containing water, an acid and at least one boehmite powder. Ratio of size of crystallites along directions [020] and [120], obtained using Scherrer formula for x-ray diffraction, varies from 0.7 to 1. Method includes adding to suspension a porogenic agent, surfactant and, optionally, water or emulsion containing at least one porogenic agent, surfactant and water. Content of porogenic agent, expressed as a ratio of weight of porogenic agent to total weight of water added to obtained suspension is in range from 0.2 to 30 %. Suspension is mixed and spheroidal particles are formed by coagulation in a droplet. Obtained particles are dried and calcined. Particles have average diameter from 1.2 to 3 mm, BET specific surface area of 150–300 m2/g, value of density of filling with a seal from 0.5 to 0.6 g/ml.
EFFECT: invention enables to obtain alumina particles with high mechanical strength with low density.
15 cl, 1 dwg, 1 tbl, 11 ex
| Title | Year | Author | Number |
|---|---|---|---|
| SPHEROIDAL PARTICLES OF ALUMINUM OXIDE WITH IMPROVED MECHANICAL STRENGTH, HAVING AVERAGE DIAMETER OF MACROPORES, BETWEEN 0,05 AND 30 mcm | 2016 |
|
RU2716435C2 |
| METHOD OF PRODUCING ALUMINIUM OXIDE BALLS BY MOLDING A HIGHLY DISPERSIBLE GEL BY DROPPING | 2015 |
|
RU2698878C2 |
| MIXED STRONTIUM ALUMINATE OXIDE AND METHOD FOR PRODUCTION THEREOF | 2020 |
|
RU2825753C2 |
| CERIA ZIRCONIA ALUMINA COMPOSITION WITH ENHANCED THERMAL STABILITY | 2012 |
|
RU2608741C2 |
| POLYMETALLIC CATALYST DOPED WITH PHOSPHORUS AND LANTHANIDE | 2016 |
|
RU2720998C2 |
| PARTIALLY CRYSTALLINE TRANSIENT ALUMINIUM OXIDE, METHOD OF ITS PRODUCING AND METHOD OF PRODUCING THE FORMED $$$-ALUMINIUM OXIDE FROM IT | 1992 |
|
RU2078043C1 |
| METHOD OF PRODUCING ALUMINUM OXIDE GEL HAVING HIGH DISPERSIBILITY AND CRYSTALLITE SIZE | 2017 |
|
RU2731569C2 |
| METHOD FOR PRODUCING GRANULATED MATERIAL RESISTANT TO ABRASION | 2018 |
|
RU2762462C2 |
| METHOD OF PRODUCING COMPOSITE MATERIALS FROM ALUMINIUM OXIDE AND MIXED OXIDES OF CERIUM AND ZIRCONIUM | 2012 |
|
RU2590162C2 |
| METHOD FOR PREPARATION OF ALUMINUM HYDROXIDE | 2021 |
|
RU2762564C1 |
