Method for preparing hydrotalcite like compound/attapulgite composite material

A composite material and hydrotalcite technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as poor regeneration performance, limited adsorption capacity, incomplete adsorption, etc., and achieve good treatment effect , good regeneration performance, and the effect of improving the utilization rate
CN103301804AInactive Publication Date: 2013-09-18LANZHOU UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LANZHOU UNIVERSITY OF TECHNOLOGY
Publication Date
2013-09-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing a hydrotalcite like compound / attapulgite composite material. The method comprises the steps of: (1) adding distilled water to attapulgite clay, agitating and dispersing for 0.5 hour to obtain 0.01-0.03% supernatant solution; (2) sequentially adding a surfactant, magnesium nitrate and aluminium nitrate, agitating for 0.5 hour; (3) slowly dropwise adding a mixed solution containing alkali and sodium carbonate while agitating, continuing agitating for 1 hour after dropwise adding is finished; (4) standing and aging for 1 hour after agitation is finished; and (5) carrying out suction filtration to neutral property, and drying at 60 DEG C, so as to obtain a white composite material product.
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Description

technical field

[0001] The invention belongs to the field of environmentally friendly adsorption materials, and in particular relates to a preparation method of a hydrotalcite-like / attapulgite composite material used for water treatment. Background technique

[0002] Hydrotalcite-like is a double metal hydroxide, which is a mixed metal hydroxide composed of divalent and trivalent metal ions with a layered crystal structure of hydrotalcite, in which part of the divalent metal ions are trivalent in the layer Metal ions are isomorphously replaced with a residual positive charge, which is called structural positive charge. Natural hydrotalcite Mg6Al(OH) 16 CO 3 .4H 2 O is rarely found in nature and is mainly synthesized artificially. Due to the crystal structure characteristics of hydrotalcite-like structure, exchangeable anions and permanent positive charge, it has potential application value in catalysts and sewage treatment.

[0003] Attapulgite clay is a hydrous magnesi...

Claims

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