Hydraulic support concentrate based on fatty acid acylamino acid and preparation method thereof

Abstract

The present application proposes a hydraulic support concentrate based on fatty acid acyl amino acids and a preparation method thereof, wherein the hydraulic support concentrate based on fatty acid acyl amino acids comprises the following components by mass percentage: functional emulsifier 4%-8%, composite lubricant 8%-12%, anti-rust and corrosion inhibitor 10%-18%, water softener 2%-5%, defoamer 0.08%-0.12%, water 58%-72%; the functional emulsifier is fatty acid acyl methionine sulfoxide alcohol ammonium salt. The hydraulic support concentrate based on fatty acid acyl amino acids described in the present application has excellent antibacterial properties and is insensitive to hard water, is adaptable to a wide range of water quality, can cope with the impact of water quality fluctuations in the preparation water on the stability of high-water hydraulic fluid, and has a low COD value and good biodegradability, which can reduce the difficulty and cost of processing high-water hydraulic fluid.

Description

Technical Field

[0001] The present application relates to the field of hydraulic support fluid, and in particular to a hydraulic support concentrate based on fatty acid acylamino acid and a preparation method thereof. Background Art

[0002] The concentrated liquid for hydraulic support is an O / W nanoemulsion composed of water-soluble or hydrophilic rust inhibitor, lubricant, emulsifier, preservative and other additives and water. Under the existing technical conditions, the lubricant is mainly fatty acid saponification, which is sensitive to hard water and easily generates saponification such as calcium and magnesium and precipitates. In actual production, the concentrated liquid is mixed with the mixing water (mine water) at a mass ratio of 5:95 in the coal mine to form a high-water hydraulic fluid (also called diluent) for the hydraulic support system. Therefore, the change in the water quality of the mixing water is the main influence on the stability of the high-water hydraulic fluid.

[0003] The coal industry standard MT76-2011 "Emulsified oil, concentrate and high water content hydraulic fluid for hydraulic supports" specifies the concentrate product model that is suitable for the water quality according to the water hardness of different mines. However, the water quality of the mixing water is often unstable in actual production. The water quality changes of the mixing water mainly include changes in hardness and microbial colonies (mainly including bacteria and mold). In response to the fluctuation of the hardness of the mixing water, sufficient amount of water softener complex Ca2+ is now mainly added to the concentrate formula. 2+ Mg 2+ ions; the change of water quality colony is mainly controlled by adding fungicides (s-triazines or isothiazolinones) into the concentrate. However, excessive addition of water softener will increase the COD (chemical oxygen demand) value of high-water hydraulic fluid, increasing the difficulty and cost of treatment; the addition of fungicides will cause the concentrate to swell (the concentrate is generally packaged in 200L iron barrels) and damage the operator's skin (contact dermatitis and allergic dermatitis), bringing inconvenience to production and use. Summary of the invention

[0004] The present application is based on the inventor's discovery and understanding of the following facts and problems: the current concentrated liquid for hydraulic supports is sensitive to water quality indicators such as the hardness of the water and the bacterial colony; excessive addition of a water softener will increase the COD value of the high-water content hydraulic fluid, increasing the difficulty and cost of processing; the addition of a bactericide will cause the concentrated liquid to swell in the barrel and damage the operator's skin, bringing inconvenience to production and use.

[0005] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0006] In view of this, one purpose of the present application is to propose a hydraulic support concentrate based on fatty acid acyl amino acids, which has excellent antibacterial properties and is insensitive to hard water, is adaptable to a wide range of water quality, and can cope with the impact of fluctuations in the quality of the preparation water on the stability of high-water hydraulic fluids. At the same time, it has a low COD value and good biodegradability, which can reduce the difficulty and cost of handling high-water hydraulic fluids.

[0007] Another object of the present application is to provide a method for preparing a hydraulic support concentrate based on fatty acid acylamino acids.

[0008] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a hydraulic support concentrate based on fatty acid acyl amino acid, comprising the following components in mass percentage: functional emulsifier 4%-8%, composite lubricant 8%-12%, rust inhibitor 10%-18%, water softener 2%-5%, defoamer 0.08%-0.12%, water 58%-72%; wherein the functional emulsifier is fatty acid acyl methionine sulfoxide ammonium salt.

[0009] According to the advantages and technical effects brought by the first aspect of the present application, the fatty acid acyl methionine sulfoxide alcohol ammonium salt belongs to anionic surfactants, has good emulsifying properties, and the sulfoxide group in its structure has a permeation effect. When in contact with bacteria, the fatty acid acyl methionine sulfoxide alcohol ammonium salt molecules can penetrate the cell wall of bacteria, enter the cell membrane, destroy the normal function of the bacterial cell wall and cell membrane, thereby inhibiting the growth of bacteria. In addition, because the sulfoxide group and the carboxyl group have a certain complexing effect on calcium and magnesium ions, it has good tolerance to hard water.

[0010] In some embodiments, the fatty acid acyl methionine sulfoxide alcohol ammonium salt is represented by the general formula (I):

[0011]

[0012] Among them, R 1 C 9 ~C 15 A straight chain alkane group, M is an organic base (HOCH 2 CH 2 ) 2 NH and (HOCH 2 CH 2 ) 3 One or two of N.

[0013] In some embodiments, the composite lubricant includes sodium oleoyl methyl taurate and oleoyl sarcosine triethanolamine, and the mass ratio of the sodium oleoyl methyl taurate to the oleoyl sarcosine triethanolamine is (68-82): (18-32). Sodium oleoyl methyl taurate and oleoyl sarcosine triethanolamine act synergistically in a specific mass ratio, have excellent lubricating properties, and can reduce the amount of lubricant used. Among them, sodium oleoyl methyl taurate has strong resistance to hard water and will not react with Ca 2+ Mg 2+ The reaction forms saponification products and precipitates; due to the introduction of amide bonds in the structure of oleoyl sarcosine triethanolamine, its hard water resistance is improved to a certain extent compared with oleic acid triethanolamine salt, which can reduce the dosage of water softener EDTA-2Na, thereby reducing the COD value of high-water hydraulic fluid for hydraulic supports. In addition, oleoyl sarcosine triethanolamine can improve the low-temperature dispersibility of sodium oleoyl methyl taurate, thereby improving the freeze-thaw performance of the concentrate.

[0014] In some embodiments, the rust and corrosion inhibitor includes sodium nitrite, sodium benzoate and benzotriazole, and the mass ratio of the sodium nitrite, sodium benzoate and benzotriazole is (15-18): (6-9): (1-3).

[0015] In some embodiments, the water softener is EDTA-2Na.

[0016] In some embodiments, the defoaming agent is any one or both of polyoxyethylene polyoxypropylene pentaerythritol ether and emulsified silicone oil.

[0017] To achieve the above-mentioned purpose, the second embodiment of the present application proposes a method for preparing a hydraulic support concentrate based on fatty acid acylamino acid, comprising the following steps:

[0018] The fatty acid acylmethionine sulfoxide is subjected to a first reaction with a first organic base to obtain a functional emulsifier;

[0019] performing a second reaction between oleoylsarcosine and a second organic base to obtain oleoylsarcosine triethanolamine;

[0020] Mixing the oleoyl sarcosine triethanolamine and sodium oleoyl methyl taurate to obtain a composite lubricant;

[0021] adding the softener into water to obtain a softener aqueous solution;

[0022] The functional emulsifier, the composite lubricant and the rust and corrosion inhibitor are added to the softener aqueous solution, which is then kept warm at a first temperature, cooled, and then added with the defoamer and mixed evenly to obtain the fatty acid acyl amino acid based hydraulic support concentrate.

[0023] In some embodiments, the molar ratio of the fatty acid acylmethionine sulfoxide to the first organic base is 1:(1.1-2.5).

[0024] In some embodiments, the first organic base is one or both of diethanolamine and triethanolamine.

[0025] In some embodiments, the temperature of the first reaction is 70-110° C., and the time of the first reaction is 1.0-3.0 h.

[0026] In some embodiments, the molar ratio of oleoylsarcosine to the second organic base is 1:(2.1-3.4).

[0027] In some embodiments, the second organic base is triethanolamine.

[0028] In some embodiments, the temperature of the second reaction is 110-150° C., and the time of the second reaction is 3.0-4.5 h.

[0029] In some embodiments, the mixing temperature of the oleoyl sarcosine triethanolamine and sodium oleoyl methyl taurate is 70-80°C.

[0030] In some embodiments, the first temperature is 60-85° C., and the insulation time is 25-35 min.

[0031] In some embodiments, the temperature after cooling is 40-50°C.

[0032] The fatty acid acyl amino acid based hydraulic support concentrate of the embodiment of the present application can bring the following beneficial effects: it has excellent antibacterial and lubricating properties and is insensitive to hard water, is adaptable to a wide range of water quality, can cope with the influence of the fluctuation of the preparation water quality on the stability of the high water content hydraulic fluid, and has a low COD value and good biodegradability, which can reduce the difficulty and cost of processing the high water content hydraulic fluid.

[0033] The preparation method of the fatty acid acylamino acid-based hydraulic support concentrate of the embodiment of the present application can bring the following beneficial effects: the preparation method is simple, easy to operate, and convenient for large-scale production.

[0034] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0036] Figure 1The present invention is a flow chart of a method for preparing a fatty acid acylamino acid based hydraulic support concentrate according to an exemplary embodiment. DETAILED DESCRIPTION

[0037] The embodiments of the present application are described in detail below. The embodiments are exemplary and intended to be used to explain the present application, but should not be construed as limiting the present application.

[0038] Throughout the application, the disclosure of numerical ranges includes all values ​​within the entire range and disclosure of further subdivided ranges, including endpoints and subranges given within those ranges.

[0039] In the application, the raw materials, equipment, etc. involved, unless otherwise specified, are all raw materials and equipment that can be produced through commercial channels or known methods; the methods involved, unless otherwise specified, are all conventional methods.

[0040] The fatty acid acyl amino acid based hydraulic support concentrate of the embodiment of the present application comprises the following components in percentage by mass: 4%-8% functional emulsifier, 8%-12% composite lubricant, 10%-18% rust and corrosion inhibitor, 2%-5% water softener, 0.08%-0.12% defoamer and 58%-72% water; wherein the functional emulsifier is fatty acid acyl methionine sulfoxide alcohol ammonium salt.

[0041] Among them, the mass percentage of functional emulsifier includes but is not limited to 4%, 5%, 6%, 7% or 8%, etc., the mass percentage of composite lubricant includes but is not limited to 8%, 9%, 10%, 11% or 12%, etc., the mass percentage of rust inhibitor includes but is not limited to 10%, 11%, 12%, 13%, 14%, 15%, 16% or 17%, etc., the mass percentage of water softener includes but is not limited to 2%, 3%, 4% or 5%, etc., the mass percentage of defoamer includes but is not limited to 0.08%, 0.09%, 0.1%, 0.11% or 0.12%, etc., the mass percentage of water includes but is not limited to 58%, 60%, 62%, 64%, 66%, 68, 70% or 72%, etc.

[0042] In the present application, fatty acid acyl methionine sulfoxide alcohol ammonium salt belongs to anionic surfactant, has good emulsifying properties, and the sulfoxide group in its structure has a permeation effect. When in contact with bacteria, fatty acid acyl methionine sulfoxide alcohol ammonium salt molecules can penetrate the cell wall of bacteria, enter the cell membrane, destroy the normal function of bacterial cell wall and cell membrane, thereby inhibiting the growth of bacteria. In addition, since the sulfoxide group and carboxyl group have a certain complexing effect on calcium and magnesium ions, it has good tolerance to hard water.

[0043] In some embodiments, the fatty acid acylmethionine sulfoxide alcohol ammonium salt is represented by the general formula (I):

[0044]

[0045] Among them, R 1 C 9 ~C 15 A straight chain alkane group, M is an organic base (HOCH 2 CH 2 ) 2 NH and (HOCH 2 CH 2 ) 3 One or two of N.

[0046] In some embodiments, the composite lubricant includes sodium oleoyl methyl taurate and oleoyl sarcosine triethanolamine, and the mass ratio of sodium oleoyl methyl taurate to oleoyl sarcosine triethanolamine is (68-82): (18-32). As a non-limiting example, the mass ratio of sodium oleoyl methyl taurate to oleoyl sarcosine triethanolamine is 68:18, 68:32, 82:18, 82:32, 75:25, 70:30 or 80:20, etc.

[0047] Sodium oleoyl methyl taurate and oleoyl sarcosine triethanolamine work synergistically in a specific mass ratio, with excellent lubricating properties, which can reduce the amount of lubricant used. Among them, sodium oleoyl methyl taurate has strong resistance to hard water and will not react with Ca 2+ Mg 2+ The reaction forms saponification products and precipitates; due to the introduction of amide bonds in the structure of oleoyl sarcosine triethanolamine, its hard water resistance is improved to a certain extent compared with oleic acid triethanolamine salt, which can reduce the dosage of water softener EDTA-2Na, thereby reducing the COD value of high-water hydraulic fluid for hydraulic supports. In addition, oleoyl sarcosine triethanolamine can improve the low-temperature dispersibility of sodium oleoyl methyl taurate, thereby improving the freeze-thaw performance of the concentrate.

[0048] In some embodiments, the rust and corrosion inhibitor includes sodium nitrite, sodium benzoate and benzotriazole, and the mass ratio of sodium nitrite, sodium benzoate and benzotriazole is (15-18): (6-9): (1-3). As a non-limiting example, the mass ratio of sodium nitrite, sodium benzoate and benzotriazole includes but is not limited to 15:6:2, 15:9:3, 18:6:1, 18:9:3 or 17.5:7.5:2, etc.

[0049] In some embodiments, the water softener is EDTA-2Na.

[0050] In some embodiments, the defoaming agent is any one or both of polyoxyethylene polyoxypropylene pentaerythritol ether and emulsified silicone oil.

[0051] The fatty acid acyl amino acid-based hydraulic support concentrate of the embodiment of the present application has excellent antibacterial and lubricating properties and is insensitive to hard water. It is adaptable to a wide range of water quality and can cope with the impact of fluctuations in the quality of the preparation water on the stability of the highly aqueous hydraulic fluid. It also has a low COD value and good biodegradability, which can reduce the difficulty and cost of handling the highly aqueous hydraulic fluid.

[0052] Figure 1 FIG. 1 is a flow chart of a method for preparing a hydraulic support concentrate based on fatty acid acylamino acids according to an exemplary embodiment. Figure 1 As shown, the preparation method comprises the following steps:

[0053] S100, subjecting fatty acid acylmethionine sulfoxide to a first reaction with a first organic base to obtain a functional emulsifier.

[0054] In some embodiments, the molar ratio of fatty acid acylmethionine sulfoxide to the first organic base is 1:(1.1-2.5), including but not limited to 1:1.1, 1:2.5, 1:1.8, 1:1.5 or 1:2, etc.

[0055] In some embodiments, the first organic base is one or both of diethanolamine and triethanolamine.

[0056] In some embodiments, the temperature of the first reaction is 70-110° C., and the time of the first reaction is 1.0-3.0 h. As a non-limiting example, the temperature of the first reaction is 70° C., 80° C., 90° C., 100° C., or 110° C., and the time of the first reaction is 1.0 h, 1.5 h, 2.0 h, 2.5 h, or 3 h, etc.

[0057] S200, subjecting oleoylsarcosine to a second reaction with a second organic base to obtain oleoylsarcosine triethanolamine.

[0058] In some embodiments, the molar ratio of oleoylsarcosine to the second organic base is 1:(2.1-3.4), including but not limited to 1:2.1, 1:3.4, 1:2.8, 1:2.5 or 1:3, etc.

[0059] In some embodiments, the second organic base is triethanolamine.

[0060] In some embodiments, the temperature of the second reaction is 110-150° C., and the time of the second reaction is 3.0-4.5 h. As a non-limiting example, the temperature of the first reaction is 110° C., 120° C., 130° C., 140° C., or 150° C., and the time of the first reaction is 3.0 h, 3.5 h, 4.0 h, or 4.5 h, etc.

[0061] S300, mixing oleoyl sarcosine triethanolamine and sodium oleoyl methyl taurate to obtain a composite lubricant.

[0062] In some embodiments, the mixing temperature of oleoyl sarcosine triethanolamine and sodium oleoyl methyl taurate is 70-80°C, including but not limited to 70°C, 73°C, 75°C, 78°C or 80°C.

[0063] S400, adding a softener into water to obtain a softener aqueous solution.

[0064] S500, adding a functional emulsifier, a composite lubricant and an anti-rust and anti-corrosion agent to the softener aqueous solution, then keeping the solution at a first temperature, cooling the solution, adding a defoamer and mixing the solution evenly to obtain a fatty acid acyl amino acid based hydraulic support concentrate.

[0065] In some embodiments, the first temperature is 60-85°C, and the holding time is 25-35 min. As a non-limiting example, the first temperature is 60°C, 70°C, 75°C, 80°C or 85°C, and the holding time is 25 min, 28 min, 30 min or 35 min.

[0066] In some embodiments, the temperature after cooling is 40-50°C, including but not limited to 40°C, 43°C, 46°C, 48°C or 50°C, etc.

[0067] The method for preparing the fatty acid acylamino acid-based hydraulic support concentrate in the embodiment of the present application has a simple process, is easy to operate, and is convenient for large-scale production.

[0068] Certain features of the present technology are further illustrated in the following non-limiting examples.

[0069] The three-necked flask with mechanical stirring involved in the following examples and comparative examples refers to a three-necked flask with a stirrer installed, which is a conventional experimental equipment.

[0070] Example 1

[0071] A hydraulic support concentrate based on fatty acid acylamino acid, the components and mass percentages of which are:

[0072]

[0073] Wherein, the functional emulsifier is decanoylmethionine sulfoxide triethanolamine salt.

[0074] The composite lubricant is a composite of sodium oleoyl methyl taurate and oleoyl sarcosine triethanolamine in a mass ratio of 68:32.

[0075] Among them, the rust and corrosion inhibitor is a compound of sodium nitrite, sodium benzoate and benzotriazole in a mass ratio of 15:6:1.

[0076] Wherein, the defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether.

[0077] Among them, the water softener is EDTA-2Na.

[0078] Among them, water is tap water.

[0079] The preparation method of the hydraulic support concentrate of this embodiment is specifically as follows:

[0080] Place decanoylmethionine sulfoxide and triethanolamine in a molar ratio of 1:1.5 in a three-necked flask with a mechanical stirrer, stir evenly, heat to 90°C, and react for 2.0 hours to obtain the functional emulsifier decanoylmethionine sulfoxide triethanolamine salt.

[0081] Place oleoylsarcosine and triethanolamine in a molar ratio of 1:3 in a three-necked flask with a mechanical stirrer, stir evenly, heat to 110°C, and react for 3.0 hours to obtain the surfactant oleoylsarcosine triethanolamine.

[0082] The obtained oleoylsarcosine triethanolamine and sodium oleoylmethyl taurate are heated to 75° C. and mixed evenly to obtain a composite lubricant.

[0083] Add a corresponding amount of water to the reactor, turn on the mechanical stirring, add the water softener EDTA-2Na to the water, add the functional emulsifier, the composite lubricant and the rust and corrosion inhibitor in sequence, raise the temperature to 75°C and keep it warm for 30.0 min, cool naturally to 40°C at room temperature, add the defoaming agent, stir for 8 min to obtain sample 1.

[0084] Example 2

[0085] A hydraulic support concentrate based on fatty acid acylamino acid, the components and mass percentages of which are:

[0086]

[0087] Wherein, the functional emulsifier is lauroylmethionine sulfoxide triethanolamine salt.

[0088] The composite lubricant is a composite of sodium oleoyl methyl taurate and oleoyl sarcosine triethanolamine in a mass ratio of 75:25.

[0089] The rust and corrosion inhibitor is a compound of sodium nitrite, sodium benzoate and benzotriazole in a mass ratio of 16:9:1.

[0090] Among them, the defoaming agent is emulsified silicone oil.

[0091] Among them, the water softener is EDTA-2Na.

[0092] Among them, water is tap water.

[0093] The preparation method of the hydraulic support concentrate of this embodiment is specifically as follows:

[0094] Place lauroylmethionine sulfoxide and triethanolamine in a molar ratio of 1:1.5 in a three-necked flask with a mechanical stirrer, stir evenly, heat to 90°C, and react for 1.0 h to obtain the functional emulsifier lauroylmethionine sulfoxide triethanolamine salt.

[0095] Place oleoylsarcosine and triethanolamine in a molar ratio of 1:2.2 in a three-necked flask with a mechanical stirrer, stir evenly, heat to 110°C, and react for 4.0 hours to obtain the surfactant oleoylsarcosine triethanolamine.

[0096] The obtained oleoylsarcosine triethanolamine and sodium oleoylmethyl taurate are heated to 75° C. and mixed evenly to obtain a composite lubricant.

[0097] Add a corresponding amount of water to the reactor, turn on the mechanical stirring, add the water softener EDTA-2Na to the water, add the functional emulsifier, the composite lubricant and the rust and corrosion inhibitor in sequence, raise the temperature to 75°C and keep it warm for 30.0 min, cool naturally to 40°C at room temperature, add the defoaming agent, stir for 8 min to obtain sample 2.

[0098] Example 3

[0099] A hydraulic support concentrate based on fatty acid acylamino acid, the components and mass percentages of which are:

[0100]

[0101] Wherein, the functional emulsifier is myristoylmethionine sulfoxide triethanolamine salt.

[0102] The composite lubricant is a composite of sodium oleoyl methyl taurate and oleoyl sarcosine triethanolamine in a mass ratio of 82:18.

[0103] Among them, the rust and corrosion inhibitor is a compound of sodium nitrite, sodium benzoate and benzotriazole in a mass ratio of 17:7:1.

[0104] The defoaming agent is a compound of polyoxyethylene polyoxypropylene pentaerythritol ether and emulsified silicone oil in a mass ratio of 2.5:1.

[0105] Among them, the water softener is EDTA-2Na.

[0106] Among them, water is tap water.

[0107] The preparation method of the hydraulic support concentrate of this embodiment is specifically as follows:

[0108] Myristoylmethionine sulfoxide and triethanolamine in a molar ratio of 1:2 were placed in a three-necked flask with a mechanical stirrer, stirred evenly, and then heated to 90°C and reacted for 3.0 hours to obtain the functional emulsifier myristoylmethionine sulfoxide triethanolamine salt.

[0109] Place oleoylsarcosine and triethanolamine in a molar ratio of 1:2.2 in a three-necked flask with a mechanical stirrer, stir evenly, heat to 110°C, and react for 4.5 hours to obtain the surfactant oleoylsarcosine triethanolamine.

[0110] The obtained oleoylsarcosine triethanolamine and sodium oleoylmethyl taurate are heated to 75° C. and mixed evenly to obtain a composite lubricant.

[0111] Add a corresponding amount of water to the reactor, turn on the mechanical stirring, add the water softener EDTA-2Na to the water, add the functional emulsifier, the composite lubricant and the rust and corrosion inhibitor in sequence, raise the temperature to 75°C and keep it warm for 30.0 min, cool naturally to 40°C at room temperature, add the defoaming agent, stir for 8 min to obtain sample 3.

[0112] Comparative Example 1

[0113] A conventional comparative hydraulic support concentrate, the components and mass percentages thereof are:

[0114]

[0115] The emulsifier is a compound of triethanolamine and fatty alcohol polyoxyethylene ether in a mass ratio of 7:5.

[0116] The composite lubricant is a composite of sulfonated castor oil and triethanolamine oleate in a mass ratio of 2:1.

[0117] The rust and corrosion inhibitor is a compound of sodium nitrite, sodium benzoate and benzotriazole in a mass ratio of 16:7:1.

[0118] Among them, the water softener is EDTA-2Na.

[0119] Wherein, the defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether.

[0120] Among them, water is tap water.

[0121] The preparation method of the hydraulic support concentrate of this comparative example is specifically as follows: add a corresponding amount of water into a reaction kettle, turn on mechanical stirring, add EDTA-2Na water softener into the water, add composite lubricant, emulsifier and rust and corrosion inhibitor in sequence, heat to 75°C and keep warm for 30.0 min, cool naturally to 40°C at room temperature, and add defoaming agent to obtain control sample 1.

[0122] Comparative Example 2

[0123] This comparative example is basically the same as Example 1, except that:

[0124] In the fatty acid acylamino acid based hydraulic support concentrate, the composite lubricant is a composite of sodium oleoyl methyl taurate and oleoyl sarcosine triethanolamine in a mass ratio of 67:32.

[0125] The fatty acid acylamino acid-based hydraulic support concentrate obtained in this comparative example is control sample 2.

[0126] Comparative Example 3

[0127] This comparative example is basically the same as Example 1, except that:

[0128] In the fatty acid acyl amino acid based hydraulic support concentrate, the composite lubricant is a composite of sodium oleoyl methyl taurate and oleoyl sarcosine triethanolamine in a mass ratio of 82:17.

[0129] The fatty acid acylamino acid-based hydraulic support concentrate obtained in this comparative example is control sample 3.

[0130] The examples and comparative samples were evaluated according to the coal industry standard MT76-2011. Table 1 is the stock solution test. The freeze-thaw resistance of comparative example 3 did not meet the standard after evaluation. The reason may be that the content of sodium oleoyl methyl taurate increased and the low-temperature dispersibility decreased. The other indicators met the standard requirements.

[0131] Table 1 Evaluation results of the original solution samples of the embodiments and comparative examples

[0132]

[0133] Table 2 shows the preparation of high-water hydraulic fluid at a mass concentration of 4%, wherein the high-water hydraulic fluid of sample 1, sample 2 and sample 3 is a 4% solution prepared with different grades of artificial hard water (10, 15 and 20), the high-water hydraulic fluid of control sample 1 is a 4% solution prepared with artificial hard water (15), and the high-water hydraulic fluid of control sample 2 and control sample 3 is a 4% solution prepared with artificial hard water (10). After evaluation, the thermal stability of control sample 2 does not meet the standard requirements, which may be due to the increase in the content of oleoylsarcosine triethanolamine, which increases the sensitivity to hard water, especially the hard water sensitivity under high temperature conditions. The other indicators meet the standard requirements. In addition, according to HJ 828-2017 "Determination of Chemical Oxygen Demand of Water Quality - Potassium Dichromate Method", the COD of the high-water hydraulic fluid of sample 1, sample 2, sample 3 and control sample 1 was tested, and the test results are shown in Table 2. As can be seen from Table 2, the COD values ​​of the high-water hydraulic fluid samples of samples 1-3 in the present application are lower than the COD value of the high-water hydraulic fluid sample of control sample 1. This is mainly because the functional emulsifier introduced into the raw materials of the concentrated liquid for hydraulic supports in Examples 1-3 of the present application has antibacterial properties and the composite lubricant is not sensitive to hard water, thereby reducing the content of other additives (such as water softeners and antibacterial agents), thereby reducing the COD values ​​of the concentrated liquid samples in Examples 1-3 of the present application.

[0134] Table 2 Evaluation results of high water content hydraulic fluid samples of Examples and Comparative Examples

[0135]

[0136]

[0137] The following special evaluation study on the antibacterial performance is carried out, and the detailed records are shown in Table 3. Specifically, samples 1-3 and control sample 1 were prepared with the same mine water (hardness 500 mg / L, total colony count of about 200 CFU / mL) to prepare 4% high-water hydraulic fluid, placed in a 100mL volumetric flask, and shaken in a shaker (36±1°C), and the changes in the total colony count of the high-water hydraulic fluid were recorded.

[0138] Table 3 Antibacterial performance test of examples and comparative examples

[0139]

[0140] According to Table 3, further in-depth research and evaluation of the antibacterial properties of the hydraulic support concentrate in the embodiment and comparative example 1 showed that as the storage time increased, the colony count of the high-water content hydraulic fluid prepared in the embodiment sample showed a downward trend, while the colony count of the high-water content hydraulic fluid prepared in the comparative example 1 increased. Therefore, it is shown that the hydraulic support concentrate in the embodiment has good antibacterial properties and can better adapt to the use of different water qualities on site.

[0141] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0142] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A hydraulic support concentrate based on fatty acid acylamino acid, characterized in that: It is composed of the following components in percentage by mass: functional emulsifier 4% - 8%, composite lubricant 8% - 12%, anti-rust and anti-corrosion agent 10% - 18%, water softener 2% - 5%, defoamer 0.08% - 0.12%, water 58% - 72%; Wherein, the functional emulsifier is fatty acid acyl methionine sulfoxide alcohol ammonium salt; The fatty acid acylmethionine sulfoxide ammonium salt is shown in the general formula (I): Formula (I): Among them, R1 is C9~C 15 A straight-chain alkane group, M is one or two of an organic base (HOCH2CH2)2NH2 and (HOCH2CH2)3NH; The composite lubricant is sodium oleoyl methyl taurate and oleoyl sarcosine triethanolamine, and the mass ratio of the sodium oleoyl methyl taurate to the oleoyl sarcosine triethanolamine is (68-82): (18-32).

2. The fatty acid acylamino acid based hydraulic support concentrate according to claim 1, characterized in that: The anti-rust and anti-corrosion agents are sodium nitrite, sodium benzoate and benzotriazole, and the mass ratio of the sodium nitrite, sodium benzoate and benzotriazole is (15-18): (6-9): (1-3).

3. The fatty acid acylamino acid based hydraulic support concentrate according to claim 1, characterized in that: The water softener is EDTA-2Na.

4. The fatty acid acylamino acid based hydraulic support concentrate according to claim 1, characterized in that: The defoaming agent is any one or two of polyoxyethylene polyoxypropylene pentaerythritol ether and emulsified silicone oil.

5. A method for preparing a hydraulic support concentrate based on fatty acid acylamino acid according to any one of claims 1 to 4, characterized in that: include: The fatty acid acylmethionine sulfoxide is subjected to a first reaction with a first organic base to obtain a functional emulsifier; performing a second reaction between oleoylsarcosine and a second organic base to obtain oleoylsarcosine triethanolamine; Mixing the oleoyl sarcosine triethanolamine and sodium oleoyl methyl taurate to obtain a composite lubricant; adding the water softener into water to obtain a water softener aqueous solution; The functional emulsifier, the composite lubricant and the rust and corrosion inhibitor are added to the water softener aqueous solution, and then kept warm at a first temperature, and then cooled and added with the defoamer and mixed evenly to obtain the fatty acid acyl amino acid based hydraulic support concentrate; The first organic base is one or both of diethanolamine and triethanolamine; The second organic base is triethanolamine.

6. The method according to claim 5, characterized in that The molar ratio of the fatty acid acylmethionine sulfoxide to the first organic base is 1:(1.1-2.5); And / or, the temperature of the first reaction is 70-110° C., and the time of the first reaction is 1.0-3.0 h.

7. The method according to claim 5, characterized in that The molar ratio of the oleoylsarcosine to the second organic base is 1:(2.1-3.4); And / or, the temperature of the second reaction is 110-150° C., and the time of the second reaction is 3.0-4.5 hours.

8. The method according to claim 5, characterized in that The mixing temperature of the oleoyl sarcosine triethanolamine and sodium oleoyl methyl taurate is 70-80° C.; And / or, the first temperature is 60-85° C., and the insulation time is 25-35 min; And / or, the temperature after cooling is 40-50°C.

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