Method for reducing the viscosity of a liquid and a low viscosity liquid

Abstract

This application provides a method for reducing liquid viscosity and a low-viscosity liquid. The method for reducing liquid viscosity includes: adding a viscosity reducer to the liquid to be treated; the viscosity reducer includes one or more of cesium iodide and potassium iodide; and controlling the temperature of the system formed by the viscosity reducer and the liquid to be treated to be 0℃-20℃. This method can effectively reduce liquid viscosity, with stable results, and is applicable to liquid-containing working conditions. Furthermore, this method is low-cost, simple to operate, and has wide-ranging effectiveness.

Description

Technical Field

[0001] This application relates to the chemical industry, and in particular to a method for reducing liquid viscosity and low-viscosity liquids. Background Technology

[0002] In the chemical and mechanical fields, the control of liquid viscosity is crucial. In the mechanical field, reducing liquid viscosity can lower the energy consumption required for liquid flow, effectively saving energy and resources. In the chemical field, controlling liquid viscosity has a significant impact on product yield and quality. By using appropriate viscosity adjustment methods, liquid viscosity can be made more stable, improving product consistency and reliability.

[0003] Currently, water-based viscosity reduction methods are very limited. Some existing viscosity reducers on the market change the viscosity of liquids by altering surface tension, but their effectiveness is unstable. Summary of the Invention

[0004] Based on this, this application provides a method for reducing liquid viscosity that is stable and applicable to liquid-containing working conditions, as well as a low-viscosity liquid.

[0005] A first aspect of this application provides a method for reducing the viscosity of a liquid, the method comprising:

[0006] A viscosity reducer is added to the liquid to be treated; the viscosity reducer includes one or more of cesium iodide and potassium iodide; and

[0007] The temperature of the system formed by the viscosity reducer and the liquid to be treated is controlled to be 0℃-20℃.

[0008] In some embodiments, the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated is greater than or equal to 1 mol / L and less than or equal to the saturation concentration of the viscosity reducer in the system.

[0009] In some embodiments, the viscosity reducer is cesium iodide, and the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated at 20°C is 1 mol / L-2.85 mol / L.

[0010] In some embodiments, the viscosity reducer is cesium iodide, and the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated at 20°C is 1.7 mol / L-2.85 mol / L.

[0011] In some embodiments, the viscosity reducer is cesium iodide, and the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated at 20°C is 2.4 mol / L-2.85 mol / L.

[0012] In some embodiments, the viscosity reducer is cesium iodide, and the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated at 0°C is 1 mol / L-1.69 mol / L.

[0013] In some embodiments, the viscosity reducer is potassium iodide, and the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated at 20°C is 1 mol / L-8.67 mol / L.

[0014] In some embodiments, the viscosity reducer is potassium iodide, and the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated at 0°C is 1 mol / L-7.68 mol / L.

[0015] In some embodiments, the liquid to be treated includes one of tap water, ultrapure water, and seawater.

[0016] The second aspect of this application provides a low-viscosity liquid prepared using the method of the first aspect of this application.

[0017] The method for reducing liquid viscosity described above involves adding one or more of cesium iodide and potassium iodide as viscosity reducers to the liquid to be treated, while controlling the system temperature at 0℃-20℃. Water molecules aggregate around the viscosity reducer, undergoing two processes: ionic bond breaking (endothermic) and ionic hydration (exothermic). The hydration energy is sufficient to offset the ionic bond breaking energy, causing the viscosity reducer to dissolve in water in ionic form, dissociating into anions and cations, carrying negative and positive charges, respectively. Water molecules, being polar, will surround the anions and cations, forming hydrated anions and cations, i.e., a water layer around the ions. The lower charge density of the anions and cations results in weaker forces on the water molecules, giving them greater freedom and reducing resistance to molecular motion, thus macroscopically reducing liquid viscosity. Therefore, this method effectively reduces liquid viscosity, provides stable results, and is suitable for liquid-containing applications. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application and to more completely understand this application and its beneficial effects, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 The bar chart shows the viscosity changes of ultrapure water before and after the addition of cesium iodide in Examples 1-4.

[0020] Figure 2This is a bar chart showing the viscosity changes of artificial seawater before and after the addition of cesium iodide in Example 6. Detailed Implementation

[0021] To facilitate understanding of the present invention, a more complete description of this application will be provided below with reference to relevant embodiments. Preferred embodiments of the present application are given below. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the disclosure of this application will be achieved.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0023] As used herein, the terms "and / or," "or / and," and "and / or" encompass any one of two or more of the related listed items, as well as any and all combinations of the related listed items. These arbitrary and all combinations include any two related listed items, any more related listed items, or a combination of all related listed items. It should be noted that when at least three items are connected using at least two conjunctions selected from "and / or," "or / and," and "and / or," it should be understood that, in this application, the technical solution undoubtedly includes solutions connected by "logical AND," and also undoubtedly includes solutions connected by "logical OR."

[0024] In this application, the technical features described in an open-ended manner include both closed technical solutions consisting of the listed features and open technical solutions that include the listed features.

[0025] In this application, numerical ranges are referred to as continuous unless otherwise specified, and include the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are incorporated.

[0026] This document only specifically discloses some numerical ranges. However, any lower limit can be combined with any upper limit to form an unspecified range; and any lower limit can be combined with other lower limits to form an unspecified range, just as any upper limit can be combined with any other upper limit to form an unspecified range. Furthermore, each individually disclosed point or single value can itself serve as a lower or upper limit and be combined with any other point or single value or with other lower or upper limits to form an unspecified range.

[0027] Unless otherwise specified, the temperature parameters in this application may be either constant temperature processing or processing within a certain temperature range. The constant temperature processing allows temperature fluctuations within the precision range controlled by the instrument, such as ±5°C, ±4°C, ±3°C, ±2°C, or ±1°C.

[0028] In this document, the term "suitable" as used in phrases such as "suitable combination," "suitable method," and "any suitable method" refers to the ability to implement the technical solution of this application, solve the technical problem of this application, and achieve the expected technical effect of this application.

[0029] In this application, terms such as "further," "even further," and "particularly" are used to describe purposes and indicate differences in content, but should not be construed as limiting the scope of protection of this application.

[0030] In this application, "optionally," "optionally," and "optional" mean that something is optional, that is, it means that it is selected from either "with" or "without." If there are multiple "optional" entries in a technical solution, unless otherwise specified, and there are no contradictions or mutual constraints, each "optional" entry shall be independent.

[0031] In the description of the application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions.

[0033] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, but sequentially is preferred.

[0034] Among related technologies, water-based viscosity reduction methods are very limited. Some existing viscosity reducers on the market change the viscosity of liquids by altering surface tension, but their effects are unstable.

[0035] To address the aforementioned issues, this application addresses the problem by adding a viscosity reducer to the liquid to be treated. Based on the hydrogen bond breaking effect at the molecular scale of hydrated ions, the viscosity of the liquid is reduced, and the effect is stable.

[0036] The first aspect of this application provides a method for reducing the viscosity of a liquid, comprising: adding a viscosity reducer to a liquid to be treated, and controlling the temperature of the system formed by the viscosity reducer and the liquid to be treated to be 0°C-20°C; the viscosity reducer includes one or more of cesium iodide and potassium iodide.

[0037] As an example, the temperature of the system formed by the viscosity reducer and the liquid to be treated can be, but is not limited to, 0℃, 1℃, 2℃, 3℃, 4℃, 5℃, 6℃, 7℃, 8℃, 9℃, 10℃, 11℃, 12℃, 13℃, 14℃, 15℃, 16℃, 17℃, 18℃, 19℃, 20℃, or any two of the above temperatures. Controlling the temperature of the system within these ranges ensures that the liquid does not freeze while effectively reducing its viscosity. When the system temperature is below 0℃, the liquid will freeze into a solid; when the system temperature is above 20℃, as the temperature further increases, the total strength of the electrostatic forces between ions and water molecules gradually exceeds the total strength of the interactions (hydrogen bonds) between water molecules, resulting in an increase in viscosity.

[0038] Understandably, when one or more of cesium iodide and potassium iodide are added to the liquid to be treated as a viscosity reducer and the system temperature is controlled at 0℃-20℃, water molecules gather around the viscosity reducer, undergoing two processes: ionic bond breaking (endothermic) and ionic hydration (exothermic). The hydration energy is sufficient to offset the ionic bond breaking energy, causing the viscosity reducer to dissolve in water in ionic form, dissociating into anions and cations, carrying negative and positive charges, respectively. Water molecules, being polar, will surround the anions and cations, forming hydrated anions and cations, i.e., a water layer around the ions. The anions and cations with lower charge density exert weaker forces on water molecules, giving nearby water molecules greater freedom and reducing resistance to molecular motion, thus macroscopically reducing liquid viscosity. Therefore, this method can effectively reduce liquid viscosity, with stable results, and is applicable to liquid-containing conditions. Furthermore, this method for reducing liquid viscosity has the advantages of low cost, simple operation, and wide-area effectiveness.

[0039] In some embodiments, the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated is greater than or equal to 1 mol / L, and less than or equal to the saturation concentration of the viscosity reducer in the system. Controlling the molar concentration of the viscosity reducer in the system within the above range allows the viscosity reducer to dissolve fully and exert its effect, while also providing excellent viscosity reduction. When the amount of viscosity reducer is below the above range, the viscosity reduction effect is weaker. When the molar concentration of the viscosity reducer in the system reaches 1 mol / L, there is a viscosity reduction effect of more than 10%, which is significant and excellent. However, when the molar concentration of the viscosity reducer in the system exceeds the saturation concentration, the added viscosity reducer cannot continue to dissolve and precipitate, and the viscosity reduction effect remains unchanged. Therefore, adding more viscosity reducer after reaching the saturation concentration results in no change in viscosity reduction effect and is wasteful.

[0040] In some embodiments, the viscosity reducer is cesium iodide, and the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated at 20°C is 1 mol / L-2.85 mol / L; for example, it can be 1 mol / L, 1.1 mol / L, 1.2 mol / L, 1.3 mol / L, 1.4 mol / L, 1.5 mol / L, 1.6 mol / L, 1.7 mol / L, 1.8 mol / L, 1.9 mol / L, 2 mol / L, 2.1 mol / L, 2.2 mol / L, 2.3 mol / L, 2.4 mol / L, 2.5 mol / L, 2.6 mol / L, 2.7 mol / L, 2.8 mol / L, 2.85 mol / L, or any range between two of the above molar concentrations.

[0041] In some alternative embodiments, the viscosity reducer is cesium iodide, and the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated at 20°C is 1.7 mol / L-2.85 mol / L; for example, it can be 1.7 mol / L, 1.8 mol / L, 1.9 mol / L, 2 mol / L, 2.1 mol / L, 2.2 mol / L, 2.3 mol / L, 2.4 mol / L, 2.5 mol / L, 2.6 mol / L, 2.7 mol / L, 2.8 mol / L, 2.85 mol / L, or any range between two of the above molar concentrations.

[0042] In some embodiments, the viscosity reducer is cesium iodide, and the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated at 20°C is 2.4 mol / L-2.85 mol / L; for example, it can be 2.4 mol / L, 2.5 mol / L, 2.6 mol / L, 2.7 mol / L, 2.8 mol / L, 2.85 mol / L, or any range between two of the above molar concentrations.

[0043] As one possible implementation, the viscosity reducer is cesium iodide, and the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated at 0°C is 1 mol / L-1.69 mol / L; for example, it can be, but is not limited to, 1 mol / L, 1.1 mol / L, 1.2 mol / L, 1.3 mol / L, 1.4 mol / L, 1.5 mol / L, 1.6 mol / L, 1.69 mol / L, or any range between two of the above molar concentrations.

[0044] In some exemplary embodiments, the viscosity reducer is potassium iodide, and the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated at 20°C is 1 mol / L-8.67 mol / L; for example, it can be 1 mol / L, 1.5 mol / L, 2 mol / L, 2.5 mol / L, 3 mol / L, 3.5 mol / L, 4 mol / L, 4.5 mol / L, 5 mol / L, 5.5 mol / L, 6 mol / L, 6.5 mol / L, 7 mol / L, 7.5 mol / L, 8 mol / L, 8.5 mol / L, 8.67 mol / L, or any range between two of the above molar concentrations.

[0045] In some alternative embodiments, the viscosity reducer is potassium iodide, and the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated at 20°C is 1 mol / L-7.68 mol / L; for example, it can be 1 mol / L, 1.5 mol / L, 2 mol / L, 2.5 mol / L, 3 mol / L, 3.5 mol / L, 4 mol / L, 4.5 mol / L, 5 mol / L, 5.5 mol / L, 6 mol / L, 6.5 mol / L, 7 mol / L, 7.5 mol / L, 7.68 mol / L, or any range between two of the above molar concentrations.

[0046] In some embodiments, the liquid to be treated includes one of tap water, ultrapure water, and seawater.

[0047] The second aspect of this application provides a low-viscosity liquid prepared using the method described in the first aspect of this application. This low-viscosity liquid has low and stable viscosity and can be used in the chemical and mechanical fields.

[0048] It should be noted that the low viscosity liquid in this application refers to a liquid with a viscosity lower than that of a water-based solution (e.g., ultrapure water, seawater, or tap water) at the same temperature.

[0049] The technical solution of the present invention will be described in detail below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. For experimental methods in the following embodiments where specific conditions are not specified, please refer to the guidelines given in this invention, or follow experimental manuals or conventional conditions in the art, or follow the conditions recommended by the manufacturer, or refer to experimental methods known in the art.

[0050] In the specific embodiments described below, the measurement parameters involving raw material components may have slight deviations within the weighing accuracy range unless otherwise specified. Temperature and time parameters are subject to acceptable deviations due to instrument testing accuracy or operational precision.

[0051] Example 1

[0052] 259.81 g of cesium iodide was weighed and added to a 1 L water tank. The tank was filled with ultrapure water and thoroughly dissolved. The solution was stirred with a glass rod to prepare a low-viscosity solution with a cesium iodide concentration of 1 mol / L. The solution temperature was controlled at 20 °C. Using an MCR302 rheometer, the viscosity of the ultrapure water remained stable at 1.005 mPa·s at different shear rates (1-10000 / s) at 20 °C. The viscosity of the 1 mol / L cesium iodide solution remained stable at 0.8773 mPa·s at the same shear rate (1-10000 / s) at 20 °C, representing a viscosity reduction rate of 13%.

[0053] Example 2

[0054] 441.677 g of cesium iodide was weighed and added to a 1 L water tank. The tank was filled with ultrapure water and thoroughly dissolved. The solution was stirred with a glass rod to prepare a low-viscosity solution with a cesium iodide concentration of 1.7 mol / L. The solution temperature was controlled at 20 °C. Using an MCR302 rheometer, the viscosity of the ultrapure water remained stable at 1.005 mPa·s at different shear rates (1-10000 / s) at 20 °C. The viscosity of the 1.7 mol / L cesium iodide solution remained stable at 0.8318 mPa·s at the same shear rate (1-10000 / s) at 20 °C, representing a viscosity reduction rate of 17%.

[0055] Example 3

[0056] 623.544 g of cesium iodide was weighed and added to a 1 L water tank. The tank was filled with ultrapure water and thoroughly dissolved. The solution was stirred with a glass rod to prepare a low-viscosity solution with a cesium iodide concentration of 2.4 mol / L. The solution temperature was controlled at 20 °C. Using an MCR302 rheometer, the viscosity of the ultrapure water remained stable at 1.005 mPa·s at different shear rates (1-10000 / s) at 20 °C. The viscosity of the 2.4 mol / L cesium iodide solution remained stable at 0.7948 mPa·s at the same shear rate (1-10000 / s) at 20 °C, representing a viscosity reduction of 21%.

[0057] Example 4

[0058] 740g of cesium iodide was weighed and added to a 1L water tank. The tank was filled with ultrapure water and thoroughly dissolved. The solution was stirred with a glass rod to prepare a low-viscosity solution with a cesium iodide concentration of 2.85mol / L. The solution temperature was controlled at 20℃. Using an MCR302 rheometer, the viscosity of the ultrapure water remained stable at 1.005 mPa·s at different shear rates (1-10000 / s) at 20℃, while the viscosity of the 2.85mol / L cesium iodide solution remained stable at 0.7351 mPa·s at the same shear rate (1-10000 / s) at 20℃, representing a viscosity reduction of 27%.

[0059] Example 5

[0060] 740g of cesium iodide was weighed and added to a 1L water tank. Artificial seawater (0.6mol / L sodium chloride solution) was then added to fill the tank and dissolved thoroughly. The solution was stirred vigorously with a glass rod to prepare a low-viscosity solution with a cesium iodide concentration of 2.85mol / L. The solution temperature was controlled at 20℃. The viscosity of the liquid was tested using an MCR302 rheometer. An equal volume of artificial seawater was prepared as a control group. At 20℃, the viscosity of the artificial seawater remained stable at 1.04 mPa·s at different shear rates from low to high (1-10000 / s). However, after adding 2.85mol / L cesium iodide, the viscosity of the artificial seawater remained stable at 0.7642 mPa·s at different shear rates from low to high (1-10000 / s), representing a 27% reduction in viscosity.

[0061] Example 6

[0062] 441.677 g of cesium iodide was weighed and added to a 1 L water tank. Artificial seawater (0.6 mol / L sodium chloride solution) was added to fill the tank and dissolved thoroughly. The solution was stirred vigorously with a glass rod to prepare a low-viscosity solution with a cesium iodide concentration of 1.69 mol / L. The solution temperature was controlled at 0 °C. The viscosity of the liquid was tested using an MCR302 rheometer. An equal volume of artificial seawater was prepared as a control group. At 0 °C, the viscosity of the artificial seawater remained stable at 1.802 mPa·s at different shear rates from low to high (1-10000 / s). However, after adding 1.69 mol / L cesium iodide, the viscosity of the artificial seawater remained stable at 1.359 mPa·s at different shear rates from low to high (1-10000 / s), representing a 25% reduction in viscosity.

[0063] Example 7

[0064] 441.677 g of cesium iodide was weighed and added to a 1 L water tank. Artificial seawater (0.6 mol / L sodium chloride solution) was added to fill the tank and dissolved thoroughly. The solution was stirred vigorously with a glass rod to prepare a low-viscosity solution with a cesium iodide concentration of 1.7 mol / L. The solution temperature was controlled at 20 °C. The viscosity of the liquid was tested using an MCR302 rheometer. An equal volume of artificial seawater was prepared as a control group. At 20 °C, the viscosity of the artificial seawater remained stable at 1.04 mPa·s at different shear rates from low to high (1-10000 / s). However, after adding 1.7 mol / L cesium iodide, the viscosity of the artificial seawater remained stable at 0.8876 mPa·s at different shear rates from low to high (1-10000 / s), representing a 15% reduction in viscosity.

[0065] Example 8

[0066] 259.81 g of cesium iodide was weighed and added to a 1 L water tank. The tank was filled with ultrapure water and thoroughly dissolved. The solution was stirred with a glass rod to prepare a low-viscosity solution with a cesium iodide concentration of 1 mol / L. The solution temperature was controlled at 0 °C. Using an MCR302 rheometer, the viscosity of the ultrapure water remained stable at 1.792 mPa·s at different shear rates (1-10000 / s) at 0 °C. In contrast, the viscosity of the 1 mol / L cesium iodide solution remained stable at 1.396 mPa·s at different shear rates (1-10000 / s), representing a viscosity reduction of 22%.

[0067] Example 9

[0068] 441.677 g of cesium iodide was weighed and added to a 1 L water tank. The tank was filled with ultrapure water and thoroughly dissolved. The solution was stirred with a glass rod to prepare a low-viscosity solution with a cesium iodide concentration of 1.69 mol / L. The solution temperature was controlled at 0 °C. Using an MCR302 rheometer, the viscosity of the ultrapure water remained stable at 1.792 mPa·s at different shear rates (1-10000 / s) at 0 °C. In contrast, the viscosity of the 1.69 mol / L cesium iodide solution remained stable at 1.309 mPa·s at different shear rates (1-10000 / s), representing a viscosity reduction of 27%.

[0069] Example 10

[0070] 259.81 g of cesium iodide was weighed and added to a 1 L water tank. The tank was filled with tap water and thoroughly dissolved. The solution was stirred with a glass rod to prepare a low-viscosity solution with a cesium iodide concentration of 1 mol / L. The solution temperature was controlled at 20 °C. Using an MCR302 rheometer, the viscosity of tap water at 20 °C remained stable at 1.009 mPa·s under different shear rates from low to high (1-10000 / s), while the viscosity of the 1 mol / L cesium iodide solution remained stable at 0.8836 mPa·s under the same shear rates, representing a viscosity reduction rate of 12%.

[0071] Example 11

[0072] 441.677 g of cesium iodide was weighed and added to a 1 L water tank. The tank was filled with tap water and thoroughly dissolved. The solution was stirred with a glass rod to prepare a low-viscosity solution with a cesium iodide concentration of 1.7 mol / L. The solution temperature was controlled at 20 °C. Using an MCR302 rheometer, the viscosity of the tap water at 20 °C remained stable at 1.009 mPa·s under different shear rates from low to high (1-10000 / s), while the viscosity of the 1.7 mol / L cesium iodide solution remained stable at 0.8437 mPa·s under the same shear rates, representing a viscosity reduction rate of 16%.

[0073] Example 12

[0074] 259.81 g of cesium iodide was weighed and added to a 1 L water tank. The tank was filled with tap water and thoroughly dissolved. The solution was stirred with a glass rod to prepare a low-viscosity solution with a cesium iodide concentration of 1 mol / L. The solution temperature was controlled at 0 °C. Using an MCR302 rheometer, the viscosity of tap water at 0 °C remained stable at 1.799 mPa·s under different shear rates from low to high (1-10000 / s), while the viscosity of the 1 mol / L cesium iodide solution remained stable at 1.405 mPa·s under the same shear rates, representing a viscosity reduction of 22%.

[0075] Example 13

[0076] 441.677 g of cesium iodide was weighed and added to a 1 L water tank. The tank was filled with tap water and thoroughly dissolved. The solution was stirred with a glass rod to prepare a low-viscosity solution with a cesium iodide concentration of 1.69 mol / L. The solution temperature was controlled at 0 °C. Using an MCR302 rheometer, the viscosity of the tap water at 0 °C remained stable at 1.799 mPa·s under different shear rates from low to high (1-10000 / s), while the viscosity of the 1.69 mol / L cesium iodide solution remained stable at 1.322 mPa·s under different shear rates from low to high (1-10000 / s), representing a viscosity reduction rate of 27%.

[0077] Example 14

[0078] 259.81 g of cesium iodide was weighed and added to a 1 L water tank. The tank was filled with ultrapure water and thoroughly dissolved. The solution was stirred with a glass rod to prepare a low-viscosity solution with a cesium iodide concentration of 1 mol / L. The solution temperature was controlled at 10 °C. Using an MCR302 rheometer, the viscosity of the ultrapure water remained stable at 1.308 mPa·s at different shear rates (1-10000 / s) at 10 °C. The viscosity of the 1 mol / L cesium iodide solution remained stable at 1.039 mPa·s at the same shear rates (1-10000 / s) at 10 °C, representing a viscosity reduction of 21%.

[0079] Example 15

[0080] 332g of potassium iodide was weighed and added to a 1L water tank. The tank was filled with ultrapure water and thoroughly dissolved. The solution was stirred with a glass rod to prepare a low-viscosity solution with a potassium iodide concentration of 2mol / L. The solution temperature was controlled at 0℃. Using an MCR302 rheometer, the viscosity of ultrapure water remained stable at 1.792 mPa·s at 0℃ under different shear rates from low to high (1-10000 / s), while the viscosity of the 2mol / L potassium iodide solution remained stable at 1.369 mPa·s at 0℃ under different shear rates from low to high (1-10000 / s), representing a viscosity reduction rate of 24%.

[0081] Example 16

[0082] 332g of potassium iodide was weighed and added to a 1L water tank. Ultrapure water was added to fill the tank, and the solution was thoroughly dissolved and stirred with a glass rod to prepare a low-viscosity solution with a potassium iodide concentration of 2mol / L. The solution temperature was controlled at 20℃. Using an MCR302 rheometer, the viscosity of ultrapure water remained stable at 1.005 mPa·s at 20℃ under different shear rates from low to high (1-10000 / s), while the viscosity of the 2mol / L potassium iodide solution remained stable at 0.8294 mPa·s at the same shear rate, representing a viscosity reduction rate of 17%.

[0083] Example 17

[0084] 166g of potassium iodide was weighed and added to a 1L water tank. The tank was filled with ultrapure water and thoroughly dissolved. The solution was stirred with a glass rod to prepare a low-viscosity solution with a potassium iodide concentration of 1mol / L. The solution temperature was controlled at 0℃. Using an MCR302 rheometer, the viscosity of ultrapure water remained stable at 1.792 mPa·s at 0℃ under different shear rates from low to high (1-10000 / s), while the viscosity of the 1mol / L potassium iodide solution remained stable at 1.416 mPa·s at the same shear rate, representing a viscosity reduction of 21%.

[0085] Example 18

[0086] 166g of potassium iodide was weighed and added to a 1L water tank. The tank was filled with ultrapure water and thoroughly dissolved. The solution was stirred with a glass rod to prepare a low-viscosity solution with a potassium iodide concentration of 1mol / L. The solution temperature was controlled at 20℃. Using an MCR302 rheometer, the viscosity of ultrapure water remained stable at 1.005 mPa·s at 20℃ under different shear rates from low to high (1-10000 / s), while the viscosity of the 1mol / L potassium iodide solution remained stable at 0.8845 mPa·s at the same shear rate, representing a viscosity reduction rate of 12%.

[0087] The low-viscosity solutions prepared in the above embodiments were subjected to viscosity tests for a relatively long period (more than 10 minutes). The sample state was visually observed, and the liquid viscosity values ​​displayed on the instrument were monitored. It was found that the viscosity of the samples in each embodiment was stable, indicating that the method for reducing liquid viscosity provided in this application is effective and reliable. Specific results are shown in Table 1. The bar charts showing the viscosity changes of ultrapure water before and after the addition of cesium iodide in Examples 1-4 are shown below. Figure 1 As shown in the bar chart, the viscosity change of artificial seawater before and after the addition of cesium iodide in Example 6 is as follows: Figure 2 As shown.

[0088] Table 1

[0089]

[0090] As shown in Table 1, the method for reducing liquid viscosity provided in this application can effectively reduce liquid viscosity, with stable results, and is applicable to working conditions containing liquid.

[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A method of reducing the viscosity of a liquid, characterized by, The method includes: A viscosity reducer is added to the liquid to be treated; the viscosity reducer includes one or more of cesium iodide and potassium iodide; and The temperature of the system formed by the viscosity reducer and the liquid to be treated is controlled to be 0℃-20℃.

2. The method as described in claim 1, characterized in that, The molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated is greater than or equal to 1 mol / L and less than or equal to the saturation concentration of the viscosity reducer in the system.

3. The method as described in claim 2, characterized in that, The viscosity reducer is cesium iodide, and at 20°C, the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated is 1 mol / L-2.85 mol / L.

4. The method as described in claim 3, characterized in that, The viscosity reducer is cesium iodide, and at 20°C, the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated is 1.7 mol / L-2.85 mol / L.

5. The method as described in claim 4, characterized in that, The viscosity reducer is cesium iodide, and at 20°C, the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated is 2.4 mol / L-2.85 mol / L.

6. The method as described in claim 2, characterized in that, The viscosity reducer is cesium iodide, and at 0°C, the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated is 1 mol / L-1.69 mol / L.

7. The method as described in claim 2, characterized in that, The viscosity reducer is potassium iodide, and at 20°C, the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated is 1 mol / L-8.67 mol / L.

8. The method as described in claim 2, characterized in that, The viscosity reducer is potassium iodide, and at 0°C, the molar concentration of the viscosity reducer in the system formed by the viscosity reducer and the liquid to be treated is 1 mol / L-7.68 mol / L.

9. The method as described in claim 1, characterized in that, The liquid to be treated includes one of tap water, ultrapure water, and seawater.

10. A low-viscosity liquid, characterized in that, It is prepared by the method according to any one of claims 1 to 9.

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