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Prepn of laminated dihydrogen oxide and its derivative quasi-periclase

A technology of hydroxide and layered double, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of technology inability to scale up, high cost, and difficult wastewater treatment applications, etc., to achieve Inexpensive effect

Inactive Publication Date: 2004-06-23
HEFEI UNIV OF TECH
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  • Application Information

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Problems solved by technology

The main problem at present is that the LDH prepared by researchers is mostly prepared by chemical reagents under strict experimental conditions. The research technology cannot be scaled up, the production volume is small, and the cost is high. It is difficult to apply in actual wastewater treatment.
Therefore, although the discovery and research of LDH has been in history for decades, and the research on synthesis technology has also formed many achievements, there are still technical and economic problems in the application of LDH as an adsorbent for water treatment.

Method used

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  • Prepn of laminated dihydrogen oxide and its derivative quasi-periclase
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  • Prepn of laminated dihydrogen oxide and its derivative quasi-periclase

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Embodiment Construction

[0016] The preparation of the layered double hydroxide in this example takes industrial acid waste water and inorganic salts in waste liquid as active ingredients.

[0017] The waste water and waste liquid applicable to this embodiment include: waste water and waste liquid produced by using bentonite and attapulgite clay as raw materials to produce activated clay and white carbon black, brine produced by evaporated salt, pickling waste water and waste liquid. In terms of chemical composition, it includes: Contains Mg 2+ 、Al 3+ 、Cu 2+ 、Co 2+ 、Ni 2+ , Fe 2+ , Fe 3+ waste water, liquid waste. The reaction materials should be added so that the ratios of Mg / Al, Cu / Al, Co / Al and Ni / Al in the reaction vessel are 4:1~1:1.

[0018] For waste water and waste liquid produced from bentonite and attapulgite clay as raw materials for activated clay and activated silica, the reaction material added to synthesize LDH is carbonate rock, that is, limestone, dolomite, or containing dolomi...

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Abstract

The present invention features that by using industrial acid waste water and inorganic salt in waste liquid as material and through inorganic chemical reaction, laminated dihydroxide (LDH) is synthesized; and through high temperature calcination, the derivative quasi-periclase is produced. The present invention is one new waste water processing technology and new LDH synthesizing technology for processing waste water and preparing LDH simultaneously. The prepared LDH or derivative quasi-periclase may be used as water purifying agent for processing waste water and drinking water. The present invention realizes the comprehensive waste treatment and resource utilization.

Description

Technical field: [0001] The invention relates to the technical fields of deep processing of non-metallic mineral resources, inorganic chemical industry and environmental engineering. More specifically, it is a preparation method of layered double hydroxide and its derivatives like periclase. Background technique: [0002] Layered double hydroxide (LDH for short), also known as anion clay, talcite-like, hydrotalcire (HTs for short). Its basic structural formula is: M x 2+ m y 3+ (OH) 2x+3y-nz (A n- )mH 2 O, M 2+ and M 3+ represent divalent and trivalent cations, respectively, A n- Represents n-valent anions. LDH has a layered structure similar to brucite, and in the structural unit layer of brucite, divalent cations are partially replaced by trivalent anions, resulting in structural positive charges. Therefore, it is necessary to introduce anions into the interlayers of the structural units to balance the positive charges of the structure. Similar to general clay...

Claims

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Application Information

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IPC IPC(8): B01J21/00C02F1/28C02F1/42C02F1/58
Inventor 陈天虎
Owner HEFEI UNIV OF TECH
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