TWI627132B - A method for producing a zeolite antibacterial material - Google Patents

Abstract

The invention relates to a method for producing a zeolite antibacterial material, which is used for preparing a zeolite antibacterial material having antibacterial efficacy, which comprises: providing a wood pellet fuel ash, the wood pellet fuel ash containing 58 to 64% by weight Cerium oxide, 26~32% aluminum oxide, 4~5% ferric oxide, 1.5~2.3% titanium dioxide, 1.4~2.2% calcium oxide, 0.7~1.3% magnesium oxide, 0.7~1% Potassium oxide; mixing the wood pellet fuel ash and an alkaline mineralizer solution, and performing a hydrothermal synthesis reaction at a temperature of 210-240 ° C and a pressure of 40-50 bar for 1 to 4 hours to form a zeolite a carrier having a plurality of pores; mixing the zeolite carrier and an antibacterial metal solution, the antibacterial metal solution comprising an antibacterial metal, and the antibacterial metal of the antibacterial metal solution is attached to the pore of the zeolite carrier to obtain a zeolite The composite material; and calcined the zeolite composite at a temperature of 500 to 600 ° C for 6 to 8 hours.

Description

Method for producing zeolite antibacterial material

The present invention relates to a method for producing a zeolite antibacterial material, and more particularly to a method for producing a zeolite antibacterial material having antibacterial efficacy.

The particulate fuel is a fuel made from the compression of biomass, in which wood pellet fuel is used as a bulk. Wood pellet fuel has a combustion efficiency of more than 85%, and the nitrogen oxides, sulfur oxides and volatiles emitted by combustion Organic compounds and other pollutants are relatively few, so they are considered to be a green biomass fuel, which is widely welcomed by the industry.

The wood pellet fuel ash produced by burning wood pellet fuel is recognized as a kind of waste, which is generally treated by landfill. It is not suitable for Taiwan with thick people. Therefore, the new application of wood pellet fuel ash is indeed a An urgent task.

In order to solve the above problems, the present invention provides a method for producing a zeolite antibacterial material, which is obtained by using wood pellet fuel ash produced by burning wood pellet fuel as a raw material to obtain a zeolite antibacterial material having antibacterial efficacy.

The method for producing a zeolite antibacterial material of the present invention comprises: providing a wood pellet fuel ash containing 58 to 64% by weight of cerium oxide and 26 to 32% of aluminum oxide by weight. 4 to 5% of ferric oxide, 1.5 to 2.3% of titanium dioxide, 1.4 to 2.2% of calcium oxide, 0.7 to 1.3% of magnesium oxide and 0.7 to 1% of potassium oxide; The fuel ash is mixed with 10 to 15 ml of a 1 M aqueous solution of sodium citrate, and the wood pellet fuel ash and the sodium citrate aqueous solution are mixed and subjected to a temperature of 210 to 240 ° C and a pressure of 40 to 50 bar. Hydrothermal synthesis reaction for 1 to 4 hours to form a zeolite carrier having a plurality of pores; mixing the zeolite with a ratio of 5 to 30 milliliters of 1000 mg/L of an antibacterial metal solution per gram of the zeolite carrier a carrier and the antibacterial metal solution, the antibacterial metal solution comprising an antibacterial metal which is silver, mercury, copper, chromium, nickel, lead or zinc, and the antibacterial metal of the antibacterial metal solution is adhered to the pore of the zeolite carrier To obtain a zeolite composite material; and calcining the zeolite composite material at a temperature of 500 to 600 ° C for 6 to 8 hours; accordingly, the wood pellet fuel ash which was originally identified as waste can be used as a raw material. The antibacterial antibacterial material has not only the new economic value of the wood pellet fuel ash, but also the waste disposal cost of burying the wood pellet fuel ash, which is the effect of the invention.

The method for producing a zeolite antibacterial material according to the present invention, wherein the zeolite composite is dried at a temperature of 105 ° C for 2 to 4 hours, and then calcined at a temperature of 500 to 600 ° C.

〔this invention〕

S1‧‧‧ hydrothermal synthesis steps

S2‧‧‧ Impregnation step

S3‧‧‧ calcination step

Fig. 1 is a flow chart showing a method for producing a zeolite antibacterial material of the present embodiment.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

Referring to Fig. 1, a method for producing a zeolite antibacterial material according to an embodiment of the present invention may substantially comprise: a hydrothermal synthesis step S1, an impregnation step S2, and a calcination step S3, whereby the original A wood particle fuel ash which is recognized as waste is used as a raw material to prepare a zeolite antibacterial material having antibacterial efficacy.

In detail, the wood pellet fuel ash may be a waste-derived solid fuel (RDF-5) which is burned and heated by high temperature, and contains ash waste of 58 to 64% by weight. (SiO ₂ ), 26 to 32% of aluminum oxide (Al ₂ O ₃ ), 4 to 5% of ferric oxide (Fe ₂ O ₃ ), 1.5 to 2.3% of titanium dioxide (TiO ₂ ), 1.4~ 2.2% calcium oxide (CaO), 0.7 to 1.3% magnesium oxide (MgO) and 0.7 to 1% potassium oxide (K ₂ O); the wood pellet fuel ash contains a large amount of bismuth and aluminum components, which can be A hydrothermal synthesis reaction can effectively form a zeolite carrier. Moreover, the wood pellet fuel ash may be pre-treated by crushing, grinding, water washing, drying, and sieving, etc., which is understood by those of ordinary skill in the art to which the present invention pertains, and details are not described herein.

In the hydrothermal synthesis step S1, the wood pellet fuel ash and an alkaline mineralizer solution are mixed, and the hydrothermal synthesis reaction is carried out under high temperature and high pressure conditions, for example, at a temperature of 210 to 240 ° C, 40~ The hydrothermal synthesis reaction is carried out under a pressure of 50 bar for 1 to 4 hours, so that a zeolite carrier having a plurality of pores can be formed, and the fuel ash is dissolved by a suitable alkaline solution provided by the alkaline mineralizer solution. The bismuth aluminum component contained in the slag feedstock is more beneficial to the formation of the zeolite support as a source of ruthenium and aluminum as a synthetic zeolite support.

The alkaline mineralizer solution may be an aqueous solution, and the aqueous solution contains an alkali metal ion; for example, the alkaline mineralizer may be an aqueous sodium hydroxide solution or a concentration of between 1 and 3 M. An aqueous solution of potassium hydroxide, and when the alkaline mineralizer is a 1 M aqueous sodium hydroxide solution, each gram of wood pellet fuel ash is mixed with 10 to 20 ml of sodium hydroxide aqueous solution to synthesize by hydrothermal synthesis. The zeolite carrier is formed by reaction; the alkaline mineralizer may also be an aqueous solution of sodium citrate having a concentration of between 0.5 and 2 M, and when the alkaline mineralizer is a sodium citrate solution having a concentration of 1 M, each The gram wood pellet fuel ash is mixed with 10-15 ml of an aqueous solution of sodium citrate to form the zeolite carrier by the hydrothermal synthesis reaction.

By adjusting the type of the alkaline mineralizer, the mixing ratio of the wood pellet fuel ash and the alkaline mineralizer can form different kinds of zeolite; for example: analcime (chemical formula is NaAlSi ₂ O ₆ (H ₂ O)) or Y-type zeolite (Zeolite Y, chemical formula: NaAlSi _2.43 O _6.86 (4.46H ₂ O)).

In the impregnation step S2, the zeolite carrier and an antibacterial metal solution are mixed, and the antibacterial metal contained in the antibacterial metal solution is adhered to the pores of the zeolite carrier by the surface tension of the antibacterial metal solution; In the middle, the system can be oscillated by ultrasonic waves at a temperature of 25 to 40 ° C for 2 to 4 hours, that is, a zeolite composite material can be obtained.

The antibacterial metal contained in the antibacterial metal solution may be silver (Ag), mercury (Hg), copper (Cu), chromium (Cr), nickel (Ni), lead (Pb) or zinc (Zn), and the antibacterial metal Is dissolved in nitric acid, sulfuric acid or hydrochloric acid to form the antibacterial metal solution; for example, an antibacterial metal solution having a concentration of 1000 mg/L can be selected, and 5 to 30 ml of the antibacterial metal solution is mixed per gram of the zeolite carrier to form the solution. Zeolite composite.

The calcining step S3 is performed by calcining the zeolite composite at a temperature of 500 to 600 ° C for 6 to 8 hours, or may be dried at a temperature of 105 ° C for 2 to 4 hours and then at 500 to 600 ° C. The calcination is carried out at a temperature to remove moisture remaining on the surface of the zeolite composite and nitrate (sulfate or chloride), whereby the zeolite antibacterial material can be obtained.

In order to confirm the method for producing the zeolite antibacterial material of the present invention, it is possible to use the wood pellet fuel ash as a raw material, and to obtain a zeolite antibacterial material having antibacterial efficacy, and to carry out the following tests:

(A) Manufacture of zeolite carrier

Please refer to Table 1, the various groups in this test mix the wood pellet fuel ash and different types of alkaline mineralizers in different proportions, respectively, hydrothermal synthesis reaction at 240 ° C for 4 hours, will The obtained zeolite carrier was identified by X-ray diffraction analyzer and environmental scanning electron microscope, respectively. The zeolite carrier of Groups A1, A2 and A4 was analcime (Analcime, chemical structure was NaAlSi ₂ O ₆ (H ₂ O). )), the zeolite carrier of Group A3 is Y-type zeolite (Zeolite Y, chemical formula is NaAlSi _2.43 O _6.86 (4.46H ₂ O)).

(B) Manufacture of zeolite antibacterial materials

The test is carried out by using the above-mentioned zeolite carrier (antimonic zeolite), preparing an antibacterial metal solution having a concentration of 1000 mg/L (the antibacterial metal contained is shown in Table 2), and mixing 30 mL of the antibacterial metal solution per gram of the zeolite carrier. After mixing, the mixture is vortexed by ultrasonic for 3 hours, and then the obtained zeolite composite is dried at a temperature of 105 ° C for 4 hours, and then calcined at a temperature of 500 to 600 ° C for 6 to 8 hours. Each group of zeolite antibacterial materials.

Each group of zeolite antibacterial materials was placed in water, and the number of colonies of Escherichia coli after one day was observed, thereby evaluating the antibacterial efficacy of each group of zeolite antibacterial materials. The results are shown in Table 2, and each group of zeolite antibacterial materials has good properties. The antibacterial effect is that the antibacterial effect of the B1 group zeolite antibacterial material added with silver as the antibacterial metal is the best.

In summary, according to the method for producing a zeolite antibacterial material of the present invention, the wood particle fuel ash which is originally identified as waste can be used as a raw material to obtain a zeolite antibacterial material having antibacterial efficacy, which not only causes the wood pellet fuel ash to be produced. New economic value, can reduce the buried The waste disposal cost of the wood pellet fuel ash is the efficacy of the invention.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

Claims (2)

A method for producing a zeolite antibacterial material, comprising: providing a wood pellet fuel ash comprising 58 to 64% by weight of cerium oxide, 26 to 32% of aluminum oxide, 4 ~5% of ferric oxide, 1.5~2.3% of titanium dioxide, 1.4~2.2% of calcium oxide, 0.7~1.3% of magnesium oxide and 0.7~1% of potassium oxide; mixed with 10 grams of wood pellet fuel ash per gram ~15 ml of a 1 M aqueous solution of sodium citrate, mixing the wood pellet fuel ash and the sodium citrate aqueous solution, and performing a hydrothermal synthesis reaction at a temperature of 210 to 240 ° C and a pressure of 40 to 50 bar 1~4 hours to form a zeolite carrier having a plurality of pores; mixing the zeolite carrier and the antibacterial metal with a ratio of 5 to 30 ml of an antibacterial metal solution of 5 to 30 ml per gram of the zeolite carrier a solution, the antibacterial metal solution comprising an antibacterial metal such as silver, mercury, copper, chromium, nickel, lead or zinc, and the antibacterial metal of the antibacterial metal solution is attached to the pore of the zeolite carrier to obtain a zeolite Composite material; and calcining the zeolite composite at a temperature of 500 to 600 ° C 6 to 8 hours. The method for producing a zeolite antibacterial material according to claim 1, wherein the zeolite composite is dried at a temperature of 105 ° C for 2 to 4 hours, and then calcined at a temperature of 500 to 600 ° C. .