Method for preparing alumina supporter

Abstract

The invention discloses a manufacturing method for aluminium dioxide, blends two kinds of different thin water aluminium wafer powder evenly, and then carries on dissolving and forming, drying, baking and gets the aluminum oxide. The first kind of thin water aluminum mine has a hole capacity of 0.50ml / g~0.80ml / g, the proportion accounts for 5w%~50w% of Al2O3 . the hole capacity of the second aluminum mine is about 0.85ml / g ~1.50ml / g. There has no contamination by using the method; the diameter of the carrier is in the range of 6nm~35nm and 100nm~2000nm; the carrier can be used as carrier of protection agent in heavy oil producing, metal eliminating catalyst and so on.

Description

technical field [0001] The invention relates to a method for preparing an alumina carrier, in particular to a method for preparing an alumina carrier for a heavy oil hydrogenation protection agent, a demetallization catalyst and a diffusion-controlled bimodal pore structure catalyst. Background technique [0002] At present, the preparation of hydrogenation protection agent and demetallization catalyst and the reaction process of diffusion control use the bimodal pore structure alumina with large pore volume and large pore size as the carrier, so that it has a large capacity for the migration of metal oxide molecules. Pores, which in turn have small pores that provide catalysis. For example, the preparation methods of alumina introduced in CN1129606A, CN1103009A, etc. all use different alumina dry glue as raw materials, the large pores are obtained by adding various pore-forming agents, and the small pores are determined by the properties of the precursors of alumina. The d...

AI Technical Summary

Problems solved by technology

Corrosive and toxic substances such as hydrochloric acid and ammonia water are used in the preparation process of the dry rubber powder. Hydrochloric acid is very corrosive to equipment. In the washing liquid, NH + 4 The content is extremely high, and the water pollution is quite severe; this method uses multiple beating and washing, resulting in low product yield and large water consumption, and the chloride ion content in the filter cake is about 1%.

The process of aluminum dry glue prepared by this method is complicated and the cost is high, and the price of alumina carrier prepared by using the aluminum dry glue prepared by this method as raw material is also relatively high

Heavy oil demetallization catalyst is a one-time product with a short service life and cannot be recycled, so its preparation cost is required to be quite low, but the catalyst produced by the alumina carrier prepared by this method will be relatively high in cost