Artificial fog-eliminating catalyst and its preparation method and application

Abstract

The present invention discloses an artificial defogging catalyst and its preparation method and application, belonging to the field of resource and environmental technology. The preparation includes the following steps: 1. Material collection: selecting metal organic compounds or organosilicon compounds; 2. Solution preparation: dissolving metal organic compounds or organosilicon compounds in non-aqueous organic solvents to prepare solvents of a certain concentration; 3. Spraying to eliminate fog: placing the mixed solution in a spray pot and spraying it can achieve the purpose of eliminating warm fog. In the process of spraying the warm fog, the metal organic compound is hydrolyzed to form metal oxides or the organosilicon compound is hydrolyzed to form silicon dioxide. The metal oxide or silicon dioxide combines with small droplets to gather more droplets to form larger droplets that can fall, thereby achieving the purpose of defogging. In addition, the non-aqueous organic solution and the metal oxide or silicon dioxide formed by hydrolysis are non-toxic and harmless substances, which avoids pollution to the environment while eliminating fog.

Description

Technical Field

[0001] The invention relates to the technical field of resources and environment, and in particular to an artificial defogging catalyst and a preparation method and application thereof. Background Art

[0002] According to the temperature in the fog, fog can be divided into warm fog, supercooled fog and ice fog. Among them, warm fog is formed by the aggregation of small water droplets above 0°C. This is mainly due to the fact that the ground dissipates heat through radiation at night, causing the air temperature close to the ground to drop below the dew point, so that the water vapor in the air condenses into tiny water droplets suspended in the air to form fog. For arid areas, fog provides the necessary moisture for vegetation, and the fog droplets can also be collected as an important source of atmospheric water collection. However, fog can also form fog disasters. The most notable feature of fog disasters is that horizontal visibility drops to a very low level, seriously affecting aviation, sea and land transportation; on the other hand, many soluble harmful substances suspended near the surface and in the air will be dissolved in the fog droplets. However, under natural conditions, fog is difficult to dissipate, so it is very necessary to prepare catalysts for artificial fog removal.

[0003] However, the chemical components in existing warm mist eliminators may have a negative impact on the environment, especially on the local ecosystem and water quality. After use, the residual chemical substances may seep into the soil or water source, affecting plant growth and the health of aquatic organisms. In addition, the existing warm mist eliminators have complex ingredients and high preparation costs. In view of the above problems, the present invention proposes an artificial mist eliminator catalyst and its preparation method and application. Summary of the invention

[0004] The purpose of the present invention is to provide an artificial defogging catalyst and a preparation method and application thereof, and to apply the prepared artificial defogging catalyst to warm fog elimination to solve the problems mentioned in the above background technology.

[0005] To achieve the above object, the present invention provides a method for preparing an artificial defogging catalyst, wherein a metal organic compound or an organosilicon compound is dissolved in a non-aqueous organic solvent and mixed to prepare an artificial defogging catalyst solution.

[0006] Preferably, the metal organic compound is one of tetraethyl titanate, tetrapropyl titanate, tetrabutyl titanate, and aluminate; and the organosilicon compound is one of ethoxysilane, propoxysilane, and butoxysilane.

[0007] Preferably, the non-aqueous organic solvent is one of ethanol, N-methylpyrrolidone, N-vinylpyrrolidone, isopropanol, formamide, and cyclohexane.

[0008] Preferably, the dissolution time is 5-10 min.

[0009] Preferably, the mixing temperature is 10-50°C.

[0010] The invention also provides an artificial defogging catalyst prepared by the preparation method.

[0011] Preferably, the concentration of the artificial fog-eliminating catalyst is 0.01-1 mol / L.

[0012] The present invention also provides the use of the artificial defogging catalyst in eliminating warm fog.

[0013] The present invention prepares a solution of a certain concentration by mixing a metal organic compound or an organosilicon compound with a non-aqueous organic solvent. During the spraying process of the warm mist, the metal organic compound is hydrolyzed to generate a metal oxide or the organosilicon compound is generated to generate silicon dioxide. The small droplets of the metal oxide or silicon dioxide are combined to gather more droplets to form larger droplets that fall, thereby achieving the purpose of eliminating fog. In addition, the organic solution used in the present invention and the metal oxide or silicon dioxide formed by hydrolysis are all non-toxic and harmless substances, thereby avoiding pollution to the environment while eliminating fog.

[0014] Therefore, the present invention provides an artificial fog-eliminating catalyst and a preparation method and application thereof, which have the following beneficial effects:

[0015] (1) Significant effect: Metal organic compounds or organosilicon compounds will hydrolyze immediately upon contact with water, and the effect is rapid and the defogging effect is obvious;

[0016] (2) Environmentally friendly: The metal oxides produced by the hydrolysis of metal organic compounds or the silicon dioxide produced by the hydrolysis of organosilicon compounds are environmentally friendly, and the specific non-aqueous organic solvent selected is a harmless reagent;

[0017] (3) Easy operation: Prepare a solution of metal organic compounds or organosilicon compounds and non-aqueous organic solvents according to the ratio and place it in a spraying device for spraying.

[0018] The technical solution of the present invention is further described in detail below through embodiments. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Any other changes, modifications, substitutions, combinations, simplifications made without violating the spirit and principle of the present invention should all be equivalent replacement methods and are included in the protection scope of the present invention. In addition, it should be understood that after reading the content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application, and all belong to the scope of protection of the present invention.

[0020] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0021] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0022] Unless otherwise specified in the present invention, the reagents, instruments, and equipment used are those commonly used by technicians in this field.

[0023] Example 1

[0024] This embodiment provides a method for preparing an artificial fog-eliminating catalyst, which specifically comprises the following steps:

[0025] ①. Take the material and select the metal organic compound that can be rapidly hydrolyzed to generate environmentally friendly metal oxides: tetraethyl titanate.

[0026] ②. For solution preparation, select a non-aqueous organic solvent that is miscible with metal organic compounds but does not react and is harmless to the environment: ethanol.

[0027] Tetraethyl titanate was dissolved in ethanol to prepare a solution with a concentration of 0.05 mol / L at 25°C.

[0028] ③. Spraying operation: Place the prepared solution in the spraying device and spray it at the place where fog needs to be eliminated.

[0029] Example 2

[0030] This embodiment provides a method for preparing an artificial fog-eliminating catalyst, which specifically comprises the following steps:

[0031] ①. Take the material and select the metal organic compound that can be rapidly hydrolyzed to generate environmentally friendly metal oxides: tetraethyl titanate.

[0032] ②. For solution preparation, select a non-aqueous organic solvent that is miscible with metal organic compounds but does not react and is harmless to the environment: ethanol.

[0033] Tetraethyl titanate was dissolved in ethanol and prepared into a solution with a concentration of 0.1 mol / L at 20°C.

[0034] ③. Spraying operation: Place the prepared solution in the spraying device and spray it at the place where fog needs to be eliminated.

[0035] Example 3

[0036] This embodiment provides a method for preparing an artificial fog-eliminating catalyst, which specifically comprises the following steps:

[0037] ①. Take the material and select the organosilicon compound that can quickly hydrolyze to form environmentally friendly silicon dioxide: tetraethyl silicate.

[0038] ②. For solution preparation, select a non-aqueous organic solvent that is miscible with the organosilicon compound but does not react and is harmless to the environment: isopropyl alcohol.

[0039] Tetraethyl silicate was dissolved in isopropanol and prepared into a solution with a concentration of 0.05 mol / L at 25°C.

[0040] ③. Spraying operation: Place the prepared solution in the spraying device and spray it at the place where fog needs to be eliminated.

[0041] The defogging effect of the defogging agent prepared in Examples 1-3 was verified, and the results were as follows:

[0042] In a 38cm*49cm*30cm enclosed space, the whole space is filled with fog. The 0.05mol / L tetraethyl titanate ethanol solution prepared in Example 1 is sprayed therein at a spraying rate of 0.8mL / time / s. The fog can be clearly seen to dissipate after the first spraying. After four consecutive sprayings and standing for 5S, it can be seen that the fog in the enclosed space has completely dissipated.

[0043] In a 38cm*49cm*30cm enclosed space, the whole space is filled with fog. The 0.1mol / L tetraethyl titanate ethanol solution prepared in Example 2 is sprayed therein at a spraying rate of 0.8mL / time / s. The fog can be clearly seen to dissipate after the first spraying. After three consecutive sprayings and standing for 4S, it can be seen that the fog in the enclosed space has completely dissipated.

[0044] In a 38cm*49cm*30cm enclosed space, the whole space was filled with fog. The 0.1mol / L tetraethyl silicate isopropanol solution prepared in Example 3 was sprayed therein at a spraying rate of 1.0mL / time / s. After two consecutive sprayings, the fog could be clearly seen to dissipate. After six consecutive sprayings and standing for 10S, it could be seen that the fog in the enclosed space had completely dissipated.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for preparing an artificial defogging catalyst, characterized in that: Dissolving a metal organic compound or an organosilicon compound in a non-aqueous organic solvent and mixing the mixture to prepare an artificial defogging catalyst solution; The metal organic compound is one of tetraethyl titanate, tetrapropyl titanate, tetrabutyl titanate, and aluminate; the organosilicon compound is one of ethoxysilane, propoxysilane, and butoxysilane; The non-aqueous organic solvent is one of ethanol, N-methylpyrrolidone, N-vinylpyrrolidone, isopropanol, formamide and cyclohexane.

2. The method for preparing an artificial defogging catalyst according to claim 1, characterized in that: The dissolution time is 5-10 min.

3. The method for preparing an artificial defogging catalyst according to claim 1, characterized in that: The mixing temperature is 10-50°C.

4. An artificial defogging catalyst, characterized in that: The artificial fog-eliminating catalyst is prepared by the preparation method described in any one of claims 1 to 3.

5. The artificial defogging catalyst according to claim 4, characterized in that: The concentration of the artificial fog-eliminating catalyst is 0.01-1 mol / L.

6. The artificial defogging catalyst according to claim 4, characterized in that: The artificial defogging catalyst is used in eliminating warm fog.