Use of a silica sol solution as a monovalent alkali metal salt or divalent alkaline earth metal salt window pane treatment agent and method of use
By treating the surface of potassium bromide window panes with silica sol solution to address the reduced light transmittance caused by water absorption, the problem of decreased light transmittance was solved, thereby improving the lifespan and reusability of the window panes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-27
- Publication Date
- 2026-04-07
AI Technical Summary
In existing technologies, potassium bromide windows exhibit reduced transmittance after testing liquid samples with high water content, leading to interference with or rendering the test results unusable. There is a lack of effective treatment methods, which increases testing costs.
Silica sol solution is used as a window treatment agent for monovalent alkali metal salts or divalent alkaline earth metal salts. By cleaning the light transmittance reduction layer on the window surface caused by water absorption, the light transmittance of the window is restored.
It effectively removes the water-absorbing layer on the surface of the window slats that reduces light transmittance, increases the lifespan and reusability of the window slats, and restores good light transmittance.
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Figure CN116124560B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of testing materials, in particular to the application of a monovalent alkali metal salt window sheet or a divalent alkali earth metal salt window sheet treatment agent and a method of application. BACKGROUND
[0002] An infrared spectrometer is an instrument for analyzing molecular structure and chemical composition by using the absorption characteristics of substances to different wavelengths of infrared radiation, which is widely used in modern chemical industry, scientific research and detection. In the analysis process, various types of window sheets are often used as sample testing carriers. Among them, potassium bromide window sheets are most widely used in infrared testing because of their relatively low price and small interference.
[0003] However, during use, after testing some liquid samples with high water content, the transmittance of the potassium bromide window sheet is reduced, which interferes with the test results of subsequent tests or even completely scrapes the window sheet. The main reason is that the water absorption of the potassium bromide window sheet reduces the surface smoothness of the window sheet, produces a rough layer on the surface, and causes diffuse reflection.
[0004] At present, there is no substance on the market that can effectively treat the transmittance reduction of the surface of the potassium bromide window sheet caused by the water absorption of the liquid sample with water during testing. The technical personnel in the field have no effective measures to solve the above-mentioned problems, and often can only purchase new potassium bromide window sheets to carry out testing, which also increases the testing cost.
[0005] Therefore, how to develop a substance that can effectively treat the transmittance reduction of the surface of the potassium bromide window sheet caused by the water absorption of the liquid sample with water during testing, and restore the good transmittance of the potassium bromide window sheet without damaging it, is an urgent problem for technical personnel in the field to solve. SUMMARY
[0006] To solve the problems of the prior art mentioned in the background, the present application provides the application of a silica sol solution as a monovalent alkali metal salt window sheet or a divalent alkali earth metal salt window sheet treatment agent. The silica sol solution is used as a monovalent alkali metal salt window sheet or a divalent alkali earth metal salt window sheet treatment agent to clean the surface of the monovalent alkali metal salt window sheet or the divalent alkali earth metal salt window sheet. The silica sol solution can effectively remove the surface layer of the monovalent alkali metal salt window sheet or the divalent alkali earth metal salt window sheet caused by the water absorption, thereby restoring the good transmittance of the monovalent alkali metal salt window sheet or the divalent alkali earth metal salt window sheet without damaging it, increasing the service life and reusability of the monovalent alkali metal salt window sheet or the divalent alkali earth metal salt window sheet.
[0007] In an embodiment, the monovalent alkali metal salt window sheet is a potassium bromide window sheet.
[0008] In an embodiment, the monovalent alkali metal salt or divalent alkali earth metal salt window sheet treating agent is a silica sol solution with a concentration of 1% to 45%.
[0009] In an embodiment, the method for preparing the silica sol solution comprises the following preparation steps:
[0010] The water glass solution is sequentially purified by a strong acid type cation exchange resin and an anion exchange resin to obtain a high-purity active silicic acid solution;
[0011] A first portion of the high-purity active silicic acid solution is added to a basic solution, the system PH is adjusted to 8.5 to 10.5, and heated to (70 to 85) °C for (0.2 to 3) h to obtain a mother liquor containing silica sol seeds;
[0012] A second portion of the high-purity active silicic acid solution is added to the mother liquor containing silica sol seeds,
[0013] and incubated at (70 to 85) °C for (0.2 to 3) h to obtain a crystallized and polymerized polysilicic acid solution;
[0014] The crystallized and polymerized polysilicic acid solution is concentrated to obtain the silica sol solution with a certain concentration;
[0015] The sum of the weight of the first portion of the high-purity active silicic acid solution and the second portion of the high-purity active silicic acid solution is the total amount of the high-purity active silicic acid solution.
[0016] In an embodiment, the weight ratio of the first portion of the high-purity active silicic acid solution to the second portion of the high-purity active silicic acid solution is 1:(2 to 20).
[0017] In an embodiment, the water glass solution is a water glass aqueous solution with a concentration of 1% to 5%.
[0018] In an embodiment, the basic solution is a NaOH solution or ammonia water.
[0019] The application also provides a method for the application of a silica sol solution as a monovalent alkali metal salt or divalent alkali earth metal salt window sheet treating agent, which comprises the following steps: adding the silica sol solution dropwise to the surface of a hygroscopic monovalent alkali metal salt or divalent alkali earth metal salt window sheet to rapidly crystallize the surface of the monovalent alkali metal salt or divalent alkali earth metal salt window sheet, wiping off the crystallization on the surface of the monovalent alkali metal salt or divalent alkali earth metal salt window sheet, and drying the monovalent alkali metal salt or divalent alkali earth metal salt window sheet.
[0020] In one embodiment, the monovalent alkali metal salt or divalent alkali earth metal salt window sheet after wiping off the crystallization on the surface is dried under the infrared lamp.
[0021] In one embodiment, the crystallization on the surface of the monovalent alkali metal salt or divalent alkali earth metal salt window sheet is wiped off using cotton containing anhydrous ethanol or soft cotton cloth containing anhydrous ethanol.
[0022] Based on the above, compared with the prior art, the application of the silica sol solution as a monovalent alkali metal salt or divalent alkali earth metal salt window sheet treatment agent and the application method have the following beneficial effects:
[0023] The application first innovatively uses the silica sol solution as a monovalent alkali metal salt or divalent alkali earth metal salt window sheet treatment agent, can effectively remove the surface layer of the monovalent alkali metal salt or divalent alkali earth metal salt window sheet caused by water absorption and resulting in reduced light transmittance, and can restore good light transmittance of the window sheet without damaging the window sheet, thereby increasing the service life and reuse rate of the window sheet.
[0024] Other features and beneficial effects of the application will be described in the following description, and some of them will become apparent from the description, or will be understood by implementing the application. The purposes and other beneficial effects of the application can be achieved and obtained by the structures specifically pointed out in the description and claims. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor; in the following description, the positional relationship described in the drawings is the direction of the components drawn in the drawings as the reference, unless otherwise specified.
[0026] Figure 1 The light transmittance graph of the normal non-hygroscopic potassium bromide window sheet for infrared testing;
[0027] Figure 2 The light transmittance graph of the potassium bromide window sheet without silica sol solution treatment in Example 1 for infrared testing;
[0028] Figure 3 The light transmittance graph of the potassium bromide window sheet after silica sol solution treatment in Example 1 for infrared testing. DETAILED DESCRIPTION
[0029] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application; as long as there is no conflict, the technical features designed in the different implementation manners described below can be combined with each other; based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of the present application.
[0030] In the description of the present application, it should be noted that all the terms (including technical terms and scientific terms) used in the present application have the same meanings as those generally understood by a person of ordinary skill in the art to which the present application belongs, and should not be understood as a limitation on the present application; it should be further understood that the terms used in the present application should be understood as having meanings consistent with the meanings of these terms in the context of the present specification and the related art, and should not be understood in an idealized or overly formal sense, unless defined explicitly in the present application.
[0031] The present application provides the use of a silica sol solution as a monovalent alkali metal salt window pane or a divalent alkali earth metal salt window pane treating agent.
[0032] The present application first and innovatively uses a silica sol solution as a monovalent alkali metal salt window pane or a divalent alkali earth metal salt window pane treating agent, which is used for surface cleaning of a monovalent alkali metal salt window pane or a divalent alkali earth metal salt window pane.
[0033] Preferably, the concentration of the silica sol solution is 1% to 45%, and more preferably, the concentration is 30% to 45%.
[0034] Preferably, the present application further provides a preferred embodiment of a specific preparation method of the silica sol solution, which comprises the following preparation steps:
[0035] (1) sequentially purifying a water glass solution by a strong acid type cation exchange resin and an anion exchange resin to remove sodium ions and other cation and anion impurities in the water glass, respectively, to obtain a high-purity active silicic acid solution;
[0036] Preferably, the water glass solution is a water glass aqueous solution (i.e., the solute is water glass and the solvent is water), and the concentration is 1% to 5%; the method for obtaining the water glass aqueous solution is to dilute water glass with water to a concentration of 1% to 5%.
[0037] (2) Take the high-purity active silica solution from the first part and add it to the alkaline solution. Adjust the pH of the system to 8.5-10.5 and heat it to (70-85)℃ and keep it at that temperature for (0.2-3)h to obtain the mother liquor containing silica sol seeds. The alkaline solution is preferably NaOH solution or ammonia water.
[0038] (3) The high-purity active silica solution of the second part is added to the mother liquor containing silica sol seed crystals and kept at (70-85)℃ for (0.2-3)h to obtain a polysilicic acid solution of crystallization polymerization;
[0039] Wherein, the sum of the weights of the first part of the high-purity active silicic acid solution and the second part of the high-purity active silicic acid solution is the total amount of high-purity active silicic acid solution; the weight ratio of the first part of the high-purity active silicic acid solution to the second part of the high-purity active silicic acid solution is 1:(2~20).
[0040] (4) The polysilicic acid solution obtained by crystallization and polymerization is concentrated to obtain the silica sol solution with a certain concentration; wherein, the concentration treatment can preferably be concentrated by heating and evaporation or by ultrafiltration.
[0041] It should be noted that:
[0042] Regarding the above-mentioned method for preparing silica sol solution, the present invention provides a reference for its feasible implementation scheme. The preparation of the above-mentioned silica sol solution can also be carried out by existing methods such as one-step dissolution of elemental silicon, electrolytic electrodialysis, acid neutralization, sol-gel method, and fumed silica method, including but not limited to the above-mentioned methods.
[0043] This invention provides a method for using silica sol solution as a treatment agent for monovalent alkali metal salt windows or divalent alkaline earth metal salt windows:
[0044] The silica sol solution is dropped onto the surface of a moisture-absorbing monovalent alkali metal salt window or a divalent alkaline earth metal salt window to rapidly crystallize the surface. The crystals are then wiped away, and the window is dried under an infrared lamp. Preferably, cotton or a soft cotton cloth containing anhydrous ethanol is used to wipe away the crystals on the window surface.
[0045] The present invention also provides the following embodiments to verify the technical effect:
[0046] Example 1
[0047] Using a 30% silica sol solution, drop it onto the moisture-absorbing area of the potassium bromide window that has not been treated with silica sol solution. After 2 seconds, the silica sol solution quickly forms a thin layer of crystals on the surface of the potassium bromide window. Carefully wipe away the crystals with cotton soaked in anhydrous ethanol, and dry it under an infrared lamp to obtain a potassium bromide window with restored light transmittance.
[0048] The specific preparation process of silica sol is as follows:
[0049] (1) First, the aqueous solution of water glass diluted to a concentration of 5% is purified by passing it through a strong acid cation exchange resin and anion exchange resin in sequence to remove sodium ions and other cation and anion impurities from the water glass, so as to obtain a high-purity active silica solution.
[0050] (2) Take the high-purity active silica solution from the first part and add it to a 30% NaOH solution. Adjust the pH of the system to 8.5-10.5 and heat it to 80°C for 1.5 hours to obtain a mother liquor containing silica sol seeds.
[0051] (3) The high-purity active silica solution of the second part is added to the mother liquor containing silica sol seeds and kept at 80°C for 0.5 h to obtain a polysilicic acid solution of crystallization polymerization; wherein the silica sol particles in the polysilicic acid solution are 10 to 100 nm.
[0052] The weight ratio of the high-purity active silica solution in the first part to the high-purity active silica solution in the second part is 1:9.
[0053] (4) The polysilicic acid solution obtained by crystallization and polymerization is concentrated to obtain the silica sol solution with a concentration of 30%.
[0054] The embodiments were tested and characterized:
[0055] (1) Infrared tests were performed on unused, normal, non-hygroscopic potassium bromide windows (standard samples), potassium bromide windows in Example 1 that were not treated with silica sol solution, and potassium bromide windows in Example 1 that were treated with silica sol solution: Wherein... Figure 1 The transmittance graph of a normal, non-hygroscopic potassium bromide window (standard sample) is obtained from infrared testing. Figure 2 This is the transmittance diagram of the potassium bromide window without silica sol treatment in Example 1, obtained from infrared testing. Figure 3 This is an infrared transmittance diagram of the potassium bromide window after treatment with silica sol solution in Example 1.
[0056] (2) By Figures 1-3 The content shows that:
[0057] The transmittance graph of a normal, non-hygroscopic potassium bromide window under infrared testing shows that it has high transmittance.
[0058] The infrared transmittance diagram of the potassium bromide window without silica sol solution treatment in Example 1 shows that, due to its hygroscopic nature, its transmittance is relatively low. Figure 1 The data has decreased significantly;
[0059] The infrared transmittance diagram of the potassium bromide window treated with silica sol solution in Example 1 shows that the transmittance of the potassium bromide window treated with silica sol solution is significantly improved to that of a normally non-moisturized potassium bromide window. This indicates that the potassium bromide window treated with silica sol solution in Example 1 has been restored, and the transmittance has been restored to about 100%, so it can be recycled and reused.
[0060] The application and method of using the silica sol solution provided by this invention as a treatment agent for monovalent alkali metal salt windows or divalent alkaline earth metal salt windows include at least the following inventive concepts and mechanisms:
[0061] The principle of this invention is as follows: when silica sol encounters monovalent alkali metal salts or divalent alkaline earth metal salts, it rapidly reacts with metal ions to form a gel, thereby completely peeling off the surface of the monovalent alkali metal salt or divalent alkaline earth metal salt window without damaging the window. The phenomenon of silica sol forming a gel upon contact with the monovalent alkali metal salt or divalent alkaline earth metal salt window, allowing for the complete peeling of the surface of the monovalent alkali metal salt or divalent alkaline earth metal salt, was accidentally discovered by the inventors during experiments. This phenomenon is not mentioned in existing publicly available information; it represents a novel and unexpected application of silica sol discovered by the inventors.
[0062] In summary, this invention innovatively uses silica sol solution as a treatment agent for monovalent alkali metal salt windows or divalent alkaline earth metal salt windows. It can effectively and completely remove the surface layer of monovalent alkali metal salt windows or divalent alkaline earth metal salt windows that has reduced light transmittance due to water absorption. Without damaging the window, it can restore good light transmittance, thereby increasing the service life and reusability of the window.
[0063] Furthermore, those skilled in the art should understand that although many problems exist in the prior art, each embodiment or technical solution of the present invention can be improved in only one or a few aspects, without necessarily solving all the technical problems listed in the prior art or the background art simultaneously. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as a limitation on that claim.
[0064] Although this document frequently uses terms such as monovalent alkali metal salt windows or divalent alkaline earth metal salt windows, and silica sol solutions, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention. The terms "first," "second," etc. (if present) in the description and claims of the embodiments of the invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. The application of silica sol solution as a treatment agent for monovalent alkali metal salt windows or divalent alkaline earth metal salt windows, characterized in that: The silica sol solution serves as a treatment agent for monovalent alkali metal salt windows or divalent alkaline earth metal salt windows, used to clean the surface of monovalent alkali metal salt windows or divalent alkaline earth metal salt windows. The monovalent alkali metal salt window is a potassium bromide window; The treatment agent is a silica sol solution with a concentration of 1% to 45%; The preparation method of the silica sol solution includes the following preparation steps: A high-purity active silica solution was obtained by sequentially purifying the water glass solution with a strong acid cation exchange resin and an anion exchange resin. Take the high-purity active silicic acid solution from the first part and add it to an alkaline solution. Adjust the pH of the system to 8.5-10.5 and heat it to (70-85)℃ and keep it at that temperature for (0.2-3)h to obtain a mother liquor containing silica sol seeds. The high-purity active silica solution of the second part is added to the mother liquor containing silica sol seeds and kept at (70-85)℃ for (0.2-3)h to obtain a polysilicic acid solution of crystallization polymerization. The polysilicic acid solution obtained by crystallization polymerization is concentrated to obtain the silica sol solution with a certain concentration. Wherein, the sum of the weights of the first part of the high-purity active silicic acid solution and the second part of the high-purity active silicic acid solution is the total amount of high-purity active silicic acid solution, wherein the weight ratio of the first part of the high-purity active silicic acid solution to the second part of the high-purity active silicic acid solution is 1:(2~20).
2. The application of the silica sol solution according to claim 1 as a treatment agent for monovalent alkali metal salt windows or divalent alkaline earth metal salt windows, characterized in that: The water glass solution is an aqueous solution of water glass with a concentration of 1% to 5%.
3. The application of the silica sol solution according to claim 2 as a treatment agent for monovalent alkali metal salt windows or divalent alkaline earth metal salt windows, characterized in that: The alkaline solution is NaOH solution or ammonia water.
4. The method of using the silica sol solution as described in any one of claims 1-3 as a treatment agent for monovalent alkali metal salt windows or divalent alkaline earth metal salt windows, characterized in that: The silica sol solution is dropped onto the surface of a moisture-absorbing monovalent alkali metal salt window or a divalent alkaline earth metal salt window to rapidly crystallize the surface of the window. The crystallization on the surface of the window is then wiped away, and the window is then dried.
5. The method for using the silica sol solution according to claim 4 as a treatment agent for monovalent alkali metal salt windows or divalent alkaline earth metal salt windows, characterized in that: After wiping away the crystals on the surface, dry the monovalent alkali metal salt window or the divalent alkaline earth metal salt window under an infrared lamp.
6. The method for using the silica sol solution according to claim 4 as a treatment agent for monovalent alkali metal salt windows or divalent alkaline earth metal salt windows, characterized in that: Use cotton or a soft cotton cloth containing anhydrous ethanol to wipe away the crystals on the surface of monovalent alkali metal salt windows or divalent alkaline earth metal salt windows.
Citation Information
Patent Citations
Method for preparing active silicic acid and silica sol
CN111732106A