Rotating liquid film reactor and application thereon in terms of preparation of layered double hydroxides

A liquid film reactor and layered composite technology, which is applied in the direction of oxide/hydroxide preparation, etc., can solve the influence of synthetic hydrotalcite particle size and uniform dispersion performance, concentration gradient, slow reaction speed and diffusion speed, and limited layer In order to achieve the effect of increasing the efficiency of collision reaction, narrow grain size distribution and fine grain
CN102616749BActive Publication Date: 2013-12-25BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2013-12-25

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Abstract

The invention belongs to a rotating liquid film reactor in the technical field of preparation of inorganic functional materials and application of the rotating liquid film reactor in terms of preparation of layered double hydroxides. On the basis of the basic technology for preparing the layered double hydroxides by a coprecipitation method, a crystal chemistry principle is adopted, fluid mechanics is calculated and analyzed, so that the rotating liquid film reactor is designed, two types of fluid flows in a limited space in a turbulence manner, uniformity of supersaturation degree is guaranteed, nucleation rate of a system is improved, crystal growth speed is reduced, layered double hydroxides products with small sizes and narrow size distribution are obtained, the sizes of the products can be controlled within a range from 10nm to 150nm, and a size distribution range of the products can be reduced to a range from 20nm to 50nm.
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Description

technical field

[0001] The invention belongs to the technical field of preparation of inorganic functional materials, in particular to a rotating liquid film reactor and its use in the preparation of layered composite metal hydroxides. Background technique

[0002] Layered composite metal hydroxides (Layered Double Hydroxides, referred to as LDHs), also known as hydrotalcite, is a typical anionic layered material, and its chemical composition formula is [M 2+ 1-x m 3+ x (OH) 2 ]A n- x / n mH 2 O, where M 2+ , M 3+ represent divalent and trivalent metal cations, respectively, A n- is an interlayer anion, x is M 3+ The mole fraction of ions, m is the number of crystal water. The element types and composition ratios of the main laminates of LDHs, and the types and quantities of interlayer objects can be adjusted in a wide range according to needs, so as to obtain a series of materials with special structures and properties.

[0003] The co-precipitation method is the ...

Claims

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