A kind of preparation method of pseudo-boehmite

A pseudo-boehmite, aluminum sulfate technology, applied in chemical instruments and methods, aluminum compounds, inorganic chemistry, etc., to achieve the effects of good bonding performance, good glue-forming performance and high glue viscosity
CN110655096BActive Publication Date: 2022-01-14湖南约瑟夫科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
湖南约瑟夫科技有限公司
Publication Date
2022-01-14

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Abstract

The invention discloses a preparation method of pseudo-boehmite, which comprises the following steps: (1) preparation of sodium metaaluminate solution; (2) preparing Al 2 o 3 Concentrated sodium metaaluminate solution and aluminum sulfate solution are added to the reaction kettle at the same time in a certain proportion and reacted. After the reaction, the slurry is transferred to another gas-liquid reaction kettle, and carbon dioxide gas is introduced into the gas-liquid reaction kettle. And control the volume ratio of air and carbon dioxide to react; (3) aging, exchange washing, filtering and drying the obtained product to obtain the pseudo-boehmite dry powder specially used for ceramic corundum abrasives. The pseudo-boehmite prepared by the invention has very low impurity content, good peptization, good gel-forming performance, transparent glue, high glue viscosity and good bonding performance, and is a special pseudo-boehmite for ceramic corundum abrasives. Moreover, by adopting the method, the output of the single-pot pseudo-boehmite can be greatly increased, thereby greatly reducing the production cost.
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Description

technical field

[0001] The invention belongs to the technical field of ceramic corundum abrasive alumina, in particular to a method for preparing pseudo-boehmite special for ceramic corundum abrasive. Background technique

[0002] The pseudo-boehmite specially used for ceramic corundum abrasives is a special pseudo-boehmite with high viscosity. Pseudo-boehmite is also called pseudo-boehmite or pseudo-boehmite, which contains 1.8 to 2.5 Alumina crystal of crystalline water molecules, which is the first crystal phase formed in the synthesis of aluminum hydroxide, is the transition state of aluminum hydroxide, and its crystallization is incomplete, and the typical crystal form is a very thin wrinkled platelet , the product of pseudo-boehmite calcined between 400 and 700 °C γ-Al 2 o 3 It is widely used as a catalyst carrier, catalyst and adsorbent, etc.; and can be calcined at 1100-1200°C to obtain nano-scale α-Al 2 o 3 , Widely used as coating additives, high-grade ceramics...

Claims

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