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Preparation method of modified zeolite and modified zeolite prepared by method

A modified zeolite and modification technology, which is applied in chemical instruments and methods, silicate, inorganic chemistry, etc., can solve the problems of high modification cost, collapse of internal structure, expensive raw materials, etc., and achieve reduction of material cost and personnel cost , improved adsorption performance, and simple preparation and operation

Inactive Publication Date: 2017-05-31
QUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature required for thermal modification is extremely high, the energy consumption is large, and the zeolite is easy to collapse during the operation; the modification time required for acid-base modification is long, and it is easy to cause the collapse of the internal structure o

Method used

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  • Preparation method of modified zeolite and modified zeolite prepared by method
  • Preparation method of modified zeolite and modified zeolite prepared by method
  • Preparation method of modified zeolite and modified zeolite prepared by method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]Weigh several grams of NaCl into a watch glass, place in a drying oven, set the temperature at 105°C, and dry to constant weight. Use the dried above-mentioned crystals to prepare 500 mL of solutions with 0.1 mol / L and 1 mol / L concentrations respectively.

[0041] The zeolite and the above-mentioned prepared inorganic salt solution are transferred into a 250mL conical flask according to a solid-to-liquid ratio of 1:30 (g / mL), covered with a stopper, and transferred to a constant temperature oscillating pot, and the temperature is set at 60°C. at 150r·min -1 rate of oscillation. Take out the Erlenmeyer flask at 1 hour, rinse it repeatedly with deionized water, place it in an oven after rinsing, adjust the drying temperature to 105° C., and dry until constant weight. Carefully take out the dry zeolite sample, put it into a plastic bag, and label it, so that only inorganic salt-modified zeolite samples can be obtained.

[0042] The SEM picture of natural zeolite and the ...

Embodiment 2

[0057] With reference to the steps of Example 1, an orthogonal experiment was carried out to the zeolite mesh number, salt reagent, modified activation solution concentration, activation time, activation temperature and activation solid-to-liquid ratio, and the same method as in Example 1 was adopted for the measurement of the modified zeolite.

[0058] Use L 9 (3 4 ) orthogonal table, select the above four modification conditions, and set up three gradients respectively, from Table 4: modification time (0.5h, 1h, 1.5h), NaCl concentration (0.2mol / L, 0.4mol / L, 0.6mol / L), solid-to-liquid ratio of zeolite to NaCl solution (1:10, 1:20, 1:30), modification temperature (60°C, 70°C, 80°C). Activate the corresponding zeolite according to the orthogonal table, and activate three copies of the corresponding zeolite (to reduce the influence of activation operation errors on the experimental results).

[0059] Table 4 Gradient Classification of Orthogonal Optimization Modification Con...

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Abstract

The invention discloses a preparation method of modified zeolite and modified zeolite prepared by the method. The preparation method comprises the following steps: (1) drying an inorganic salt reagent to constant weight, and preparing a modified activation solution; (2) proportionally adding zeolite into the modified activation solution, transferring into a closed vessel and oscillating at the constant temperature of 50-80 DEG C for 0.5-3 hours; and (3) after the reaction in the step (2) finishes, taking out the zeolite, washing with deionized water, and drying to constant weight, thereby obtaining the modified zeolite. The modified zeolite is used for low-concentration ammonia nitrogen wastewater treatment, has the advantages of excellent adsorbability, simple preparation technique and low cost, and is recyclable.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a preparation method of a modified zeolite and the prepared modified zeolite. Background technique [0002] Ammonia nitrogen is one of the common pollutants in water, not only from various types of animal feces, but also from fertilizers, coking, synthetic ammonia, dyes, pharmaceuticals, oil refining and petroleum products and other industrial wastewater. When the water body contains a large amount of ammonia nitrogen, it will poison fish and other aquatic animals, causing eutrophication of the natural water body, and bringing great difficulties to the pre-treatment of domestic and industrial water. The methods for removing ammonia nitrogen in sewage include biological nitrification method, gas stripping method and ion exchange method. The biological method has no pollution and low energy consumption, but its conversion is slow and it is difficult to remove complete...

Claims

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Application Information

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IPC IPC(8): B01J20/16B01J20/32C02F1/28C02F1/42
CPCB01J20/165B01J20/3204C02F1/281C02F1/42
Inventor 程海翔徐天有舒霖刘倩赟徐南豪李璐瑶
Owner QUZHOU UNIV
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