Low-cost nano aluminum oxide film preparation method and nano aluminum oxide film

Abstract

The invention discloses a low-cost nano aluminum oxide powder preparation method which comprises the following steps: 1. preparing an aluminum ammonium sulfate crystal from an aluminum oxide spent catalyst or aluminum scrap turnings; 2. dissolving aluminum ammonium sulfate in water, taking aqua ammonia, dropwisely adding the aluminum ammonium sulfate solution into the aqua ammonia while stirring to obtain a precipitate, filtering, adding a hydrochloric acid solution, heating in a water bath while stirring, sufficiently reacting, adding polyvinyl alcohol, and cooling to room temperature to obtain a boehmite sol; and 3. immersing a pretreated support base into the boehmite sol, slowly lifting, drying at room temperature, transferring into a furnace, heating to 550 DEG C, keeping for 2 hours, and carrying out furnace cooling to obtain the nano aluminum oxide film on the support base. By using waste as the raw material, the preparation method disclosed by the invention has the advantages of cost saving, simple production technique and not need of adding complex equipment, and can easily implement industrial production.

Description

technical field [0001] The invention relates to a preparation method of a nano-alumina film, in particular to a low-cost preparation method of a nano-alumina film and a nano-alumina film prepared according to the preparation method. Background technique [0002] Membrane materials and membrane technology are currently one of the most popular high-tech in the world. In many aspects such as energy, electronics, petrochemical industry, medicine and health, food industry, environmental protection and people's life, all kinds of separation processes are required (such as separation of substances, purification, removal of pollution, refining, purification, etc. ). The traditional separation process has high energy consumption and low efficiency. After switching to membrane technology, it can often achieve energy saving, high efficiency and environmental friendliness. In today's world of energy shortages, water resources shortages, and increasingly serious environmental pollution...

AI Technical Summary

Problems solved by technology

[0004] At present, the production of aluminum oxide film mostly uses aluminum alkoxide as raw material, and the technical route is relatively mature. The disadvantage is that alkoxide is expensive and difficult to prepare, and the cost is relatively high.

Due to the above reasons, the application and promotion of alumina ceramic filter membranes are seriously hindered, and the scale and process of its industrialization are also limited.

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