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Preparation method for synthesizing NaX-type molecular sieve adsorption material from fly ash and application of material

An adsorption material, molecular sieve technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc. The effect of recycling

Inactive Publication Date: 2016-05-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems existing in the prior art, the present invention provides a preparation method and application method for synthesizing NaX-type molecular sieve adsorption materials from fly ash, so as to overcome the problems of high cost of producing molecular sieves and environmental pollution caused by fly ash in the prior art

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) The solid waste fly ash discharged from the power plant is used as raw material, dried at 100°C, and the fly ash is pretreated by adding HCl solution, wherein the liquid-solid ratio of the HCl solution to the fly ash is 10:1 (ml :g), the massfraction of HCl solution is 20%. The mixture system was stirred at 80°C for 2 hours, separated from solid and liquid, and the acidic solution in the wet precipitate was removed with deionized water, and dried to obtain the pretreated fly ash. Mix solid sodium hydroxide with pretreated fly ash at a weight ratio of 1.2:1, and roast in an open system at 550°C for 1 hour to obtain a molten product. The molten product was leached in deionized water, and stirred at a stirring speed of 400r / min for 24 hours at room temperature to obtain a silica-alumina gel, wherein the liquid-solid ratio of deionized water to the molten product was 5:1 (ml:g) . After the pH of the silica-alumina gel was adjusted to 11 with HCl solution, it was cryst...

Embodiment 2

[0030](1) Using the solid waste fly ash discharged from the power plant as the raw material, drying at 100 ° C, and pre-processing the fly ash by adding HCl solution, wherein the liquid-solid ratio of the HCl solution to the fly ash is 20:1 (ml : g), the mass fraction of the HCl solution is 10%. The mixture system was stirred at 80° C. for 3 hours, subjected to solid-liquid separation, and deionized water was used to remove the acidic solution in the wet precipitation, and dried to obtain the pretreated fly ash. The solid sodium hydroxide and the pretreated fly ash were mixed in a weight ratio of 2:1, and calcined in an open system at 550 ° C for 1.5 h to obtain a molten product. The molten product was leached in deionized water, and stirred at a stirring speed of 500 r / min for 48 hours at room temperature to obtain a silica-alumina gel, wherein the liquid-solid ratio of deionized water to the molten product was 4:1 (ml:g) . After the pH of the silica-alumina gel was adjuste...

Embodiment 3

[0034] (1) Using the solid waste fly ash discharged from the power plant as the raw material, drying at 100 ° C, and pre-processing the fly ash by adding HCl solution, wherein the liquid-solid ratio of the HCl solution to the fly ash is 15:1 (ml : g), the mass fraction of the HCl solution is 30%. The mixture system was stirred at 80°C for 2.5 hours, and after solid-liquid separation, deionized water was used to remove the acidic solution in the wet precipitation, and after drying, the pretreated fly ash was obtained. The solid sodium hydroxide and the pretreated fly ash were mixed in a weight ratio of 1.5:1, and calcined in an open system at 550 °C for 2 h to obtain a molten product. The molten product was leached in deionized water, and stirred at a stirring speed of 300 r / min for 48 hours at room temperature to obtain a silica-alumina gel, wherein the liquid-solid ratio of deionized water to the molten product was 6:1 (ml:g) . After the pH of the silica-alumina gel was adj...

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Abstract

The invention discloses a method for preparing a NaX-type molecular sieve from fly ash and application of the molecular sieve. The fly ash is adopted as a main raw material and subjected to pretreatment, and sodium hydroxide is added for a melting reaction. Deionized water is added into a melting product, and NaX-type molecular sieve raw powder is obtained through a hydrothermal crystallization method. Octadecanoic acid is added to generate an esterification reaction with the NaX-type molecular sieve raw powder, and a NaX-type molecular sieve adsorption material is obtained. The NaX-type molecular sieve adsorption material is placed in crude oil or an oil-water mixture, and in-situ oil removing treatment on spilled oil pollution is achieved by utilizing the in-situ adsorption and purification capacity of the NaX-type molecular sieve adsorption material on spilled oil. According to the method, the environmental problems caused by fly ash solid waste and spilled oil pollution are simultaneously solved, and not only is the comprehensive utilization performance of the fly ash improved, but also cyclic utilization of the fly ash and recycling of oil products in the spilled oil are achieved, and the secondary pollution problem cannot be generated; in addition, the product cost of the molecular sieve is reduced by taking the fly ash as the raw material to prepare the NaX-type molecular sieve adsorption material.

Description

technical field [0001] The invention belongs to the field of environmental protection, and specifically relates to a molecular sieve oil spill adsorption material, in particular to an organically modified NaX type molecular sieve adsorption material prepared by using fly ash as a raw material and its application. Background technique [0002] With the continuous development of offshore oil exploration and development technology, offshore oil resources have been continuously developed and utilized. Although the problem of energy shortage has been alleviated to a large extent, it has also brought a very serious problem of marine environmental pollution. Among them, marine oil pollution, as the most serious form of marine environmental pollution, threatens marine ecological security and indirectly affects human health through seafood. It is estimated that my country discharges 1.15×108kg of oil into the sea every year, and it shows an increasing trend. On June 4 and 17, 2011, o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/18B01J20/30C02F1/28C02F103/08
CPCB01J20/22B01J20/18B01J2220/4806C02F1/288C02F2103/08
Inventor 赵林高平强张岩李鑫斐温晓晴
Owner TIANJIN UNIV
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