CN110760352A - Coal water slurry dispersant prepared from modified molasses and preparation method thereof - Google Patents
Coal water slurry dispersant prepared from modified molasses and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/24—Organic compounds containing sulfur, selenium and/or tellurium
- C10L1/2462—Organic compounds containing sulfur, selenium and/or tellurium macromolecular compounds
- C10L1/2475—Organic compounds containing sulfur, selenium and/or tellurium macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon to carbon bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/24—Organic compounds containing sulfur, selenium and/or tellurium
- C10L1/2493—Organic compounds containing sulfur, selenium and/or tellurium compounds of uncertain formula; reactions of organic compounds (hydrocarbons, acids, esters) with sulfur or sulfur containing compounds
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/326—Coal-water suspensions
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/18—Use of additives to fuels or fires for particular purposes use of detergents or dispersants for purposes not provided for in groups C10L10/02 - C10L10/16
Abstract
The invention provides a coal water slurry dispersing agent prepared by using modified molasses and a preparation method thereof, relating to the technical field of coal water slurry dispersing agents, wherein the coal water slurry dispersing agent comprises the following components in parts by weight: 30-80 parts of molasses, 5-25 parts of 32% liquid sodium hydroxide, 5-10 parts of 27% hydrogen peroxide, 500 parts of deionized water 350-. The method utilizes the molasses modification for industrial production, avoids resource waste when the molasses is directly treated, avoids the pollution of waste discharge to the environment when the molasses is treated by fermentation, and realizes the application of the modified molasses in the new field.
Description
Technical Field
The invention relates to the technical field of coal water slurry dispersants, and particularly relates to a coal water slurry dispersant prepared from modified molasses and a preparation method of the coal water slurry dispersant.
Background
Molasses is a by-product in the sugar production process using sugarcane, beet, citrus, corn, etc. as a raw material, and is generally classified into sucrose molasses, beet molasses, citrus molasses, corn molasses, etc. according to the source. The molasses contains a large amount of abundant substance components such as sugar, protein, mineral substances, vitamins, cellulose, amines and the like, and the proportion of each component is slightly different according to different molasses types. At present, the total amount of domestic supplied molasses is about 400 million tons/year, the domestic supplied molasses is mainly used for producing alcohol and yeast through fermentation and is directly treated for producing feed, and meanwhile, part of the modified molasses is used for industrial production such as cement water reducing agent after modification. However, in general, the molasses is directly applied, so that the added value is low, the molasses can be subjected to fermentation deep processing to obtain added value products, but negative effects are generated, the direct discharge of the sewage of the by-product can pollute soil, water sources and the like, and the environmental management is not economical and the energy consumption is high. The additional value of the modified molasses is higher than that of the modified molasses directly applied, and the problem of environmental pollution in fermentation application is also avoided. The mutual influence, rule and material among the modified molasses, cement and concrete components thereof, coal and water-coal-slurry components are hardly reported. Therefore, the molasses modification and the application of the modified molasses in new fields, such as natural biological action of starch, cellulose and the like, can be further researched and developed, an edible green environment-friendly packaging material can be developed, and the modified molasses has wide application and research prospects in the aspects of medicine, pesticide, industry and the like. The modified molasses must bring the economic and social benefits into play in the national economic development.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a coal water slurry dispersing agent prepared by using modified molasses and a preparation method thereof.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
the coal water slurry dispersant prepared by using the modified molasses comprises the following components in parts by weight: 30-80 parts of molasses, 5-25 parts of 32% liquid sodium hydroxide, 5-10 parts of 27% hydrogen peroxide, 500 parts of deionized water 350-.
Preferably, the raw material of the coal water slurry dispersant comprises the following components in parts by weight: 50 parts of molasses, 10 parts of 32% liquid sodium hydroxide, 6 parts of hydrogen peroxide, 400 parts of deionized water, 0.8 part of 3-mercaptopropionic acid, 200300 parts of monomer TPEG, 1.5 parts of sodium formaldehyde sulfoxylate, 28.8 parts of methacrylic acid and 8.2 parts of hydroxyethyl.
Preferably, the raw material of the coal water slurry dispersant comprises the following components in parts by weight: 80 parts of molasses, 21 parts of 32% liquid alkali, 8.3 parts of hydrogen peroxide, 380 parts of deionized water, 0.9 part of 3-mercaptopropionic acid, 400260 parts of monomer TPEG, 1.5 parts of sodium formaldehyde sulfoxylate, 25 parts of methacrylic acid and 7.6 parts of hydroxyethyl.
Preferably, the raw material of the coal water slurry dispersant comprises the following components in parts by weight: 30 parts of molasses, 6 parts of 32% liquid sodium hydroxide, 5 parts of 27% hydrogen peroxide, 430 parts of deionized water, 1 part of 3-mercaptopropionic acid, 600300 parts of monomer TPEG, 1.8 parts of sodium formaldehyde sulfoxylate, 30 parts of methacrylic acid and 6 parts of hydroxyethyl ester.
The preparation method of the coal water slurry dispersing agent prepared by using the modified molasses comprises the following steps:
1) pretreatment of molasses: putting molasses into a flask, heating to 50 ℃, adding 20-30 parts of deionized water, stirring and mixing uniformly, adding 32% liquid sodium hydroxide, cooling to below 35 ℃, adding 3-7 parts of hydrogen peroxide, stirring and reacting for 30-90min to obtain a modified primary product mo for later use;
2) preparing A, B materials: uniformly mixing 130-200 parts of deionized water, 3-mercaptopropionic acid and sodium formaldehyde sulfoxylate to obtain a material A; uniformly mixing 50-110 parts of deionized water, methacrylic acid and hydroxyethyl ester to obtain a material B;
3) taking a four-neck flask, adding 200-600 parts of monomer TPEG and 210 parts of 160-one-neck deionized water, uniformly stirring and mixing, adding the rest hydrogen peroxide, uniformly stirring and mixing, dripping A, B materials into the four-neck flask after 10min, wherein the dripping time of the material A is 2-4h, and the dripping time of the material B is 1.5-3.5 h;
4) and adding the modified primary product Mo after the dripping is finished, and continuously reacting for 1-3h to obtain the coal water slurry dispersing agent Mo.
Preferably, hydrogen peroxide is added in the step 1), and the reaction time is 60min, and the reaction time in the step 4) is 1.5 h.
The coal water slurry dispersing agent prepared by using the modified molasses is applied to the field of coal water slurry dispersing.
(III) advantageous effects
The invention provides a coal water slurry dispersant prepared by using modified molasses and a preparation method thereof, and the coal water slurry dispersant has the following beneficial effects:
1. the modified molasses is used for continuously synthesizing the coal water slurry dispersing agent, and the product contains more active groups such as hydroxyl, carboxyl, carbonyl, ester group, polyoxyethylene group and the like which act on coal water slurry particles, so that the dispersing effect of the coal water slurry is enhanced, and a new direction is opened for the research of the coal water slurry dispersing agent.
2. The invention uses the modified molasses for industrial production, avoids resource waste when the molasses is directly treated, avoids the pollution of waste discharge to the environment when the molasses is treated by fermentation, and realizes the application of the modified molasses in the new field.
3. The coal water slurry prepared by the invention has low production cost, can act on the coal water slurry alone to play a good dispersing role, and the dispersing effect, the adaptability and the stability of the product can be greatly improved when the coal water slurry is compounded with other dispersing agents (such as a naphthalenesulfonic acid-formaldehyde condensate, an aliphatic water reducing agent, sodium lignosulfonate and the like) and sodium carbonate according to a certain proportion compared with the single use.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The molasses used in the invention is common cane molasses, and the main components of the molasses are as follows: 2 to 26.2 percent of water, 40 to 49.6 percent of cane sugar, 6 to 7.1 percent of mineral, 8.2 to 12.6 percent of ash and 4.3 to 5.9 percent of protein.
In the following examples, a naphthalene sulfonate formaldehyde condensate produced by Anhuxin environmental protection technology, Inc. was used for comparison, and NX was used in place of the condensate.
The instrument and the detection method for detecting the characteristics of the coal water slurry are as follows: 1. the experimental apparatus is a Brookield Bohler fly DV1 viscometer, a 150ml beaker, and a halogen moisture meter, USA.
2. The experimental steps include ① switching on the power supply of the experimental instrument, adjusting the level and automatically adjusting the zero, ② taking the same amount of sample and placing the sample in a 150ml beaker to ensure the temperature and the quality of the measured sample, placing the beaker below the instrument to enable a rotor to enter the sample until a scale mark on the rotor, and starting the test by pressing a start key, ③ measuring the viscosity of the sample by using a 62# rotor at the speed of a shearing speed position 20, wherein the viscosity comparison must be carried out under the same instrument, rotor, speed, container, temperature and test time.
The experimental instrument and the detection method used for the fluidity experiment are as follows:
1. experimental apparatus a. truncated cone circular mold: the diameter of the upper opening is 36mm, the diameter of the lower opening is 60mm, the height is 60mm, and the inner wall of the metal product is smooth and has no seam; b. glass plates (400X 400mm, thickness 5 mm); c. straightedge in steel, (300 mm); d. and (4) scraping the blade.
2. The experimental steps include ① placing the glass plate in a horizontal position, wetting the surface of the glass plate, the truncated cone round mold, the stirrer and the stirring pot with wet cloth without water stain, ② placing the truncated cone round mold in the center of the glass plate and covering with wet cloth for standby, ③ quickly injecting the coal water slurry into the truncated cone round mold, scraping with a scraper, vertically lifting the truncated cone round mold until the coal water slurry flows on the glass plate until the coal water slurry does not flow, measuring the maximum diameter of the flowing part in two mutually perpendicular directions with a ruler, and taking the average value as the fluidity of the coal water slurry.
3. And (3) stability testing, namely testing the stability by adopting a rod dropping method, wherein the required experimental apparatus and the detection method are as follows:
an experimental instrument: 150ml beaker, electronic balance, preservative film, 300mm ruler and timer.
The experimental steps are as follows: 150g of the coal water slurry was weighed into a 150ml beaker, completely sealed with a sealing film, left to stand at room temperature, and the depths (H1 and H2) of 10X 200mm glass rods at 10s for 5 minutes were measured within 24 hours while the actual depths (H) were measured to calculate the soft precipitation rate and the hard precipitation rate in accordance with the following equation. Soft precipitation rate (H-H1)/hx 100%, and hard precipitation rate (H-H2)/hx 100%.
Example 1:
the coal water slurry dispersant prepared by using the modified molasses comprises the following components in parts by weight: 50 parts of molasses, 10 parts of 32% liquid sodium hydroxide, 6 parts of 27% hydrogen peroxide, 430 parts of deionized water, 0.8 part of 3-mercaptopropionic acid, 200300 parts of monomer TPEG, 1.5 parts of sodium formaldehyde sulfoxylate, 28.8 parts of methacrylic acid and 8.2 parts of hydroxyethyl ester.
The preparation method of the coal water slurry dispersing agent prepared by using the modified molasses comprises the following steps:
1) pretreatment of molasses: putting molasses into a flask, heating to 50 ℃, adding 20 parts of deionized water, stirring and mixing uniformly, adding 32% liquid sodium hydroxide, cooling to below 35 ℃, adding 3.8 parts of hydrogen peroxide, stirring and reacting for 60min to obtain a modified primary product mo for later use;
2) preparing A, B materials: uniformly mixing 180 parts of deionized water, 3-mercaptopropionic acid and sodium formaldehyde sulfoxylate to obtain a material A; uniformly mixing 50 parts of deionized water, methacrylic acid and hydroxyethyl ester to obtain a material B;
3) taking a four-neck flask, adding 200 parts of monomer TPEG and 180 parts of deionized water, stirring and mixing uniformly, adding the rest hydrogen peroxide, stirring and mixing uniformly, dripping A, B materials into the four-neck flask simultaneously after 10min, wherein the dripping time of the material A is 2-4h, and the dripping time of the material B is 1.5-3.5 h;
4) and adding the modified primary product Mo after the dripping is finished, and continuously reacting for 1.5 hours to obtain the coal water slurry dispersing agent Mo-1.
The dispersant Mo-1 obtained in the embodiment 1 is applied to coal water slurry of Qinghai salt lake, the coal water slurry dispersant synthesized by modified molasses or the mixed coal water slurry dispersant compounded with other dispersants is added into water and coal in the form of aqueous solution, the mixing amount of the dispersant is 0.1-0.5 percent of that of the coal, and various indexes such as the concentration, the viscosity, the expansion degree, the stability and the like of the coal water slurry are measured. And a commonly used dispersant NX + sodium lignosulfonate on the market is selected as a control group, and various indexes such as concentration, viscosity, expansion degree, stability and the like are detected under the condition of consistent doping amount. The results are shown in Table 1.
Table 1: the coal-water slurry concentration, the viscosity, the expansion degree and the stability of the Mo-1 are compared when the coal-grinding time is 90S and the mixing amount of the dispersant is 0.3 percent.
As can be seen from Table 1, under the condition of consistent experimental conditions and the same amount of dispersant, Mo-1 has obvious dispersibility which is slightly poorer than the dispersion effect of the commonly used combination of NX and sodium lignosulfonate, but the prepared coal water slurry has better stability. The effect of the Mo-1, sodium lignosulfonate, NX, sodium lignosulfonate and NX after compounding is better than that of the Mo-1 when used alone, and the dispersing effect of the mixed dispersing agent obtained by compounding the dispersing agent in proportion in an experiment is more than that of the Mo-1, the sodium lignosulfonate and the NX, more than that of the Mo-1, the NX and the sodium lignosulfonate. However, the data table is only limited to the results obtained by the ratio of the compound mixing, and Mo-1 can be compounded and mixed with various dispersants, sodium carbonate and the like according to different ratios, so that the obtained dispersivity is different.
Example 2:
the coal water slurry dispersant prepared by using the modified molasses comprises the following components in parts by weight: 80 parts of molasses, 21 parts of 32% liquid sodium hydroxide, 8.3 parts of 27% hydrogen peroxide, 480 parts of deionized water, 0.9 part of 3-mercaptopropionic acid, 260 parts of monomer TPEG400, 1.5 parts of sodium formaldehyde sulfoxylate, 25 parts of methacrylic acid and 7.6 parts of hydroxyethyl ester.
The preparation method of the coal water slurry dispersing agent prepared by using the modified molasses comprises the following steps:
1) pretreatment of molasses: putting molasses into a flask, heating to 50 ℃, adding 30 parts of deionized water, stirring and mixing uniformly, adding 32% liquid sodium hydroxide, cooling to below 35 ℃, adding 5.6 parts of hydrogen peroxide, stirring and reacting for 60min to obtain a modified primary product mo for later use;
2) preparing A, B materials: uniformly mixing 180 parts of deionized water, 3-mercaptopropionic acid and sodium formaldehyde sulfoxylate to obtain a material A; uniformly mixing 90 parts of deionized water, methacrylic acid and hydroxyethyl ester to obtain a material B;
3) taking a four-neck flask, adding 400 parts of monomer TPEG and 180 parts of deionized water, stirring and mixing uniformly, adding the rest hydrogen peroxide, stirring and mixing uniformly, dripping A, B materials into the four-neck flask after 10min, wherein the dripping time of the material A is 4h, and the dripping time of the material B is 3 h;
4) and adding the modified primary product Mo after the dripping is finished, and continuously reacting for 1h to obtain the coal water slurry dispersant Mo-2.
The dispersant Mo-2 in the embodiment 2 is applied to coal water slurry of Qinghai salt lake, the coal water slurry dispersant synthesized by modified molasses or the mixed coal water slurry dispersant compounded with other dispersants is added into water and coal in the form of aqueous solution, the mixing amount of the dispersant is 0.1-0.5 percent of the coal, and various indexes such as the concentration, the viscosity, the expansion degree, the stability and the like of the coal water slurry are measured. And a commonly used dispersant naphthalene series + sodium lignosulfonate on the market is selected as a control group, and various indexes such as concentration, viscosity, expansion degree, stability and the like are detected under the condition of consistent doping amount. The results are shown in Table 2.
Table 2: the coal-water slurry concentration, the viscosity, the expansion degree and the stability of the Mo-2 are compared when the coal-grinding time is 90S and the mixing amount of the dispersant is 0.3 percent.
As can be seen from Table 2, under the condition of consistent experimental conditions and the same amount of dispersant, Mo-2 has obvious dispersibility which is slightly poorer than the dispersion effect of the commonly used combination of NX and sodium lignosulfonate, but the prepared coal water slurry has better stability. The effect of the Mo-2, sodium lignosulfonate, NX and sodium lignosulfonate + NX after compounding is better than that of the Mo-2 when used alone, and the dispersing effect of the mixed dispersing agent obtained by the compounding ratio of the dispersing agent used in the experiment is that the dispersing effect of the Mo-2+ sodium lignosulfonate + NX is more than that of the Mo-2+ NX and that of the Mo-2+ sodium lignosulfonate is more than that of the NX + sodium lignosulfonate. However, the data table is only limited to the results obtained by the ratio of the compound mixing, and Mo-2 can be compounded and mixed with various dispersants, sodium carbonate and the like according to different ratios, so that the obtained dispersivity is different.
Example 3:
the coal water slurry dispersant prepared by using the modified molasses comprises the following components in parts by weight: 30 parts of molasses, 6 parts of 32% liquid sodium hydroxide, 5 parts of 27% hydrogen peroxide, 430 parts of deionized water, 1 part of 3-mercaptopropionic acid, 300 parts of monomer TPEG600, 1.8 parts of sodium formaldehyde sulfoxylate, 30 parts of methacrylic acid and 6 parts of hydroxyethyl ester.
The preparation method of the coal water slurry dispersing agent prepared by using the modified molasses comprises the following steps:
1) pretreatment of molasses: putting molasses into a flask, heating to 50 ℃, adding 30 parts of deionized water, stirring and mixing uniformly, adding 32% liquid sodium hydroxide, cooling to below 35 ℃, adding 3.6 parts of hydrogen peroxide, stirring and reacting for 60min to obtain a modified primary product mo for later use;
2) preparing A, B materials: uniformly mixing 130 parts of deionized water, 3-mercaptopropionic acid and sodium formaldehyde sulfoxylate to obtain a material A; uniformly mixing 70 parts of deionized water, methacrylic acid and hydroxyethyl ester to obtain a material B;
3) taking a four-neck flask, adding monomer TPEG600 and 200 parts of deionized water, stirring and mixing uniformly, adding the rest hydrogen peroxide, stirring and mixing uniformly, dripping A, B materials into the four-neck flask after 10min, wherein the dripping time of the material A is 3.5h, and the dripping time of the material B is 3 h;
4) and adding the modified primary product Mo after the dripping is finished, and continuously reacting for 1h to obtain the coal water slurry dispersant Mo-3.
The dispersant Mo-3 in example 3 is applied to coal water slurry of Qinghai salt lake, the coal water slurry dispersant synthesized by modified molasses or the mixed coal water slurry dispersant compounded with other dispersants is added into water and coal in the form of aqueous solution, the mixing amount of the dispersant is 0.1-0.5% of the coal, and various indexes such as the concentration, the viscosity, the expansion degree, the stability and the like of the coal water slurry are measured. And a commonly used dispersant NX + sodium lignosulfonate on the market is selected as a control group, and various indexes such as concentration, viscosity, expansion degree, stability and the like are detected under the condition of consistent doping amount. The results are shown in Table 3.
Table 3: the coal-water slurry concentration, the viscosity, the expansion degree and the stability of the Mo-3 are compared when the coal-grinding time is 90S and the mixing amount of the dispersant is 0.3 percent.
As can be seen from Table 3, under the condition of consistent experimental conditions and the same amount of dispersant, Mo-3 has obvious dispersibility which is slightly poorer than the dispersion effect of the commonly used combination of NX and sodium lignosulfonate, but the prepared coal water slurry has better stability. The effect of the Mo-3, sodium lignosulfonate, NX and sodium lignosulfonate plus NX after compounding is better than that of the Mo-3 when used alone, and the dispersing effect of the mixed dispersing agent obtained by compounding the dispersing agent in proportion in the experiment is that the dispersing effect of the Mo-3, the sodium lignosulfonate plus NX is more than that of the Mo-3 and the NX, and the dispersing effect of the sodium lignosulfonate is more than that of the NX and the sodium lignosulfonate. However, the data table is only limited to the results obtained by the ratio of the compound mixing, and Mo-3 can be compounded and mixed with various dispersants, sodium carbonate and the like according to different ratios, and the obtained dispersivity is also different.
Example 4:
the coal water slurry dispersant prepared by using the modified molasses comprises the following components in parts by weight: 30 parts of molasses, 20 parts of 32% liquid sodium hydroxide, 5.6 parts of 27% hydrogen peroxide, 500 parts of deionized water, 0.55 part of 3-mercaptopropionic acid, 200300 parts of monomer TPEG, 1.2 parts of sodium formaldehyde sulfoxylate, 25 parts of methacrylic acid and 6.3 parts of hydroxyethyl ester.
The preparation method of the coal water slurry dispersing agent prepared by using the modified molasses comprises the following steps:
1) pretreatment of molasses: putting molasses into a flask, heating to 50 ℃, adding 30 parts of deionized water, stirring and mixing uniformly, adding 32% liquid sodium hydroxide, cooling to below 35 ℃, adding 4 parts of hydrogen peroxide, stirring and reacting for 60min to obtain a modified primary product mo for later use;
2) preparing A, B materials: uniformly mixing 180 parts of deionized water, 3-mercaptopropionic acid and sodium formaldehyde sulfoxylate to obtain a material A; uniformly mixing 110 parts of deionized water, methacrylic acid and hydroxyethyl ester to obtain a material B;
3) taking a four-neck flask, adding 200 parts of monomer TPEG and 180 parts of deionized water, stirring and mixing uniformly, adding the rest hydrogen peroxide, stirring and mixing uniformly, dripping A, B materials into the four-neck flask after 10min, wherein the dripping time of the material A is 3h, and the dripping time of the material B is 2.5 h;
4) and adding the modified primary product Mo after the dripping is finished, and continuously reacting for 1h to obtain the coal water slurry dispersant Mo-4.
The dispersant Mo-4 in the embodiment 4 is applied to coal water slurry of Qinghai salt lake, the coal water slurry dispersant synthesized by modified molasses or the mixed coal water slurry dispersant compounded with other dispersants is added into water and coal in the form of aqueous solution, the mixing amount of the dispersant is 0.1-0.5 percent of the coal, and various indexes such as the concentration, the viscosity, the expansion degree, the stability and the like of the coal water slurry are measured. And a commonly used dispersant NX + sodium lignosulfonate on the market is selected as a control group, and various indexes such as concentration, viscosity, expansion degree, stability and the like are detected under the condition of consistent doping amount. The results are shown in Table 4.
Table 4: the coal-water slurry concentration, the viscosity, the expansion degree and the stability of the Mo-4 are compared when the coal-grinding time is 90S and the mixing amount of the dispersant is 0.3 percent.
As can be seen from Table 4, under the condition of consistent experimental conditions and the same amount of dispersant, Mo-4 has obvious dispersibility, and the dispersibility is slightly poorer than the dispersion effect of the commonly used combination of NX and sodium lignosulfonate, but the prepared coal water slurry has poor stability. The effect of the Mo-4, sodium lignosulfonate, NX and sodium lignosulfonate plus NX after compounding is better than that of the Mo-4 when used alone, and the dispersing effect of the mixed dispersing agent obtained by the compounding ratio of the dispersing agent used in the experiment is that the dispersing effect of the Mo-4 plus sodium lignosulfonate plus NX is more than that of the Mo-4 plus NX and that of the Mo-4 plus sodium lignosulfonate plus is more than that of the NX plus sodium lignosulfonate plus. However, the data table is only limited to the results obtained by the ratio of the compound mixing, and Mo-4 can be compounded and mixed with various dispersants, sodium carbonate and the like according to different ratios, so that the obtained dispersivity is different.
Example 5:
the coal water slurry dispersant prepared by using the modified molasses comprises the following components in parts by weight: 50 parts of molasses, 10 parts of 32% liquid sodium hydroxide, 6 parts of 27% hydrogen peroxide, 430 parts of deionized water, 0.8 part of 3-mercaptopropionic acid, 200300 parts of monomer TPEG, 1.5 parts of sodium formaldehyde sulfoxylate, 28.8 parts of methacrylic acid and 8.2 parts of hydroxyethyl ester.
The preparation method of the coal water slurry dispersing agent prepared by using the modified molasses comprises the following steps:
1) pretreatment of molasses: putting molasses into a flask, heating to 50 ℃, adding 20 parts of deionized water, stirring and mixing uniformly, adding 32% liquid sodium hydroxide, cooling to below 35 ℃, adding 3.8 parts of hydrogen peroxide, stirring and reacting for 60min to obtain a modified primary product mo for later use;
2) preparing A, B materials: uniformly mixing 180 parts of deionized water, 3-mercaptopropionic acid and sodium formaldehyde sulfoxylate to obtain a material A; uniformly mixing 50 parts of deionized water, methacrylic acid and hydroxyethyl ester to obtain a material B;
3) taking a four-neck flask, adding monomer TPEG and 180 parts of deionized water, stirring and mixing uniformly, adding the rest hydrogen peroxide, stirring and mixing uniformly, dripping A, B materials into the four-neck flask after 10min, wherein the dripping time of the material A is 3h, and the dripping time of the material B is 2.5 h;
4) and adding the modified primary product Mo after the dripping is finished, and continuously reacting for 1.5 hours to obtain the coal water slurry dispersing agent Mo-5.
The dispersant Mo-5 obtained in the example 5 is applied to coal water slurry of Qinghai salt lake, the coal water slurry dispersant synthesized by modified molasses or the mixed coal water slurry dispersant compounded with other dispersants is added into water and coal in the form of aqueous solution, the mixing amount of the dispersant is 0.1-0.5 percent of that of the coal, and various indexes such as the concentration, the viscosity, the expansion degree, the stability and the like of the coal water slurry are measured. And a commonly used dispersant NX + sodium lignosulfonate on the market is selected as a control group, and various indexes such as concentration, viscosity, expansion degree, stability and the like are detected under the condition of consistent doping amount. The results are shown in Table 5.
Table 5: the coal-water slurry concentration, the viscosity, the expansion degree and the stability of the Mo-5 are compared when the coal-grinding time is 90S and the mixing amount of the dispersant is 0.3 percent.
As can be seen from Table 5, under the condition of consistent experimental conditions and the same amount of dispersant, Mo-5 has obvious dispersibility which is slightly poorer than the dispersion effect of the commonly used combination of NX and sodium lignosulfonate, but the prepared coal water slurry has better stability. The effect of the Mo-5 compounded with the sodium lignosulfonate, the NX, the sodium lignosulfonate and the NX is better than that of the Mo-5 used alone, and the dispersing effect of the mixed dispersing agent obtained by compounding the dispersing agent in proportion in the experiment is more than that of the Mo-5+ the sodium lignosulfonate and the NX and is more than that of the Mo-5+ the NX and is more than that of the NX + the sodium lignosulfonate. However, the data table is only limited to the results obtained by the ratio of the compound mixing, and Mo-5 can be compounded and mixed with various dispersants, sodium carbonate and the like according to different ratios, so that the obtained dispersivity is different.
Comparative example 1:
the coal water slurry dispersant prepared by using the modified molasses comprises the following components in parts by weight: 80 parts of molasses, 30 parts of 32% liquid sodium hydroxide, 6 parts of 27% hydrogen peroxide, 400 parts of deionized water, 0.5 part of 3-mercaptopropionic acid, 300 parts of monomer TPEG800, 1.5 parts of sodium formaldehyde sulfoxylate, 35 parts of methacrylic acid and 5.2 parts of hydroxyethyl ester.
The preparation method of the coal water slurry dispersing agent prepared by using the modified molasses comprises the following steps:
1) pretreatment of molasses: putting molasses into a flask, heating to 80 ℃, adding 20 parts of deionized water, stirring and mixing uniformly, adding 32% liquid sodium hydroxide, cooling to below 35 ℃, adding 3.8 parts of hydrogen peroxide, stirring and reacting for 30-90min to obtain a modified primary product mo for later use;
2) preparing A, B materials: uniformly mixing 130 parts of deionized water, 3-mercaptopropionic acid and sodium formaldehyde sulfoxylate to obtain a material A; uniformly mixing 70 parts of deionized water, methacrylic acid and hydroxyethyl ester to obtain a material B;
3) taking a four-neck flask, adding monomer TPEG and 180 parts of deionized water, stirring and mixing uniformly, adding the rest hydrogen peroxide, stirring and mixing uniformly, dripping A, B materials into the four-neck flask after 10min, wherein the dripping time of the material A is 3h, and the dripping time of the material B is 2.5 h;
4) adding the modified primary product mo after the dripping is finished, continuing to react for 1.5h, and beginning to generate a gel phenomenon after the reaction is carried out for 25 min.
Comparative example 2:
the coal water slurry dispersant prepared by using the modified molasses comprises the following components in parts by weight: 80 parts of molasses, 30 parts of 32% liquid sodium hydroxide, 6 parts of 27% hydrogen peroxide, 400 parts of deionized water, 0.5 part of 3-mercaptopropionic acid, 1000260 parts of monomer TPEG, 1.5 parts of rongalite, 27 parts of methacrylic acid and 5.2 parts of hydroxyethyl ester.
The preparation method of the coal water slurry dispersing agent prepared by using the modified molasses comprises the following steps:
1) pretreatment of molasses: putting molasses into a flask, heating to 80 ℃, adding 20 parts of deionized water, stirring and mixing uniformly, adding 32% liquid sodium hydroxide, cooling to below 35 ℃, adding 3.8 parts of hydrogen peroxide, stirring and reacting for 60min to obtain a modified primary product mo for later use;
2) preparing A, B materials: uniformly mixing 130 parts of deionized water, 3-mercaptopropionic acid and sodium formaldehyde sulfoxylate to obtain a material A; uniformly mixing 70 parts of deionized water, methacrylic acid and hydroxyethyl ester to obtain a material B;
3) taking a four-neck flask, adding monomer TPEG and 180 parts of deionized water, stirring and mixing uniformly, adding the rest hydrogen peroxide, stirring and mixing uniformly, dripping A, B materials into the four-neck flask after 10min, wherein the dripping time of the material A is 3h, and the dripping time of the material B is 2.5 h;
4) and adding the modified primary product Mo after the dripping is finished, and continuously reacting for 1.5 hours to obtain the coal water slurry dispersing agent Mo-7.
The dispersant Mo-7 obtained in the comparative example 2 is applied to coal water slurry of Qinghai salt lake coal, the coal water slurry dispersant synthesized by modified molasses or the mixed coal water slurry dispersant compounded with other dispersants is added into water and coal in the form of aqueous solution, the mixing amount of the dispersant is 0.1-0.5 percent of that of the coal, and various indexes such as the concentration, the viscosity, the expansion degree, the stability and the like of the coal water slurry are measured. And a commonly used dispersant NX + sodium lignosulfonate on the market is selected as a control group, and various indexes such as concentration, viscosity, expansion degree, stability and the like are detected under the condition of consistent doping amount. The results are shown in Table 6.
Table 6: the coal-water slurry concentration, the viscosity, the expansion degree and the stability of the Mo-7 are compared when the coal-grinding time is 90S and the mixing amount of the dispersant is 0.3 percent.
As can be seen from Table 6, under the condition of consistent experimental conditions and the same amount of dispersant, Mo-7 has dispersibility, but the dispersibility is poorer than the dispersion effect of the common combination of NX and sodium lignosulfonate, and the prepared coal water slurry has poorer stability. The effect of the Mo-7 after being compounded with sodium lignosulfonate, NX, sodium lignosulfonate and NX is better than that of the Mo-7 when being used alone, and the dispersing effect of the mixed dispersing agent obtained by compounding the dispersing agent in proportion in the experiment is NX + sodium lignosulfonate dispersing effect > Mo-7+ sodium lignosulfonate + NX dispersing effect > Mo-7+ sodium lignosulfonate dispersing effect. However, the data table is only limited to the results obtained by the ratio of the compound mixing, and Mo-7 can be compounded and mixed with various dispersants, sodium carbonate and the like according to different ratios, and the obtained dispersivity is also different.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The coal water slurry dispersing agent prepared from the modified molasses is characterized by comprising the following raw materials in parts by weight: 30-80 parts of molasses, 5-25 parts of 32% liquid sodium hydroxide, 5-10 parts of 27% hydrogen peroxide, 500 parts of deionized water 350-.
2. The dispersant for coal water slurry prepared by using the modified molasses of claim 1, wherein the raw material of the dispersant for coal water slurry comprises the following components in parts by weight: 50 parts of molasses, 10 parts of 32% liquid sodium hydroxide, 6 parts of hydrogen peroxide, 400 parts of deionized water, 0.8 part of 3-mercaptopropionic acid, 200300 parts of monomer TPEG, 1.5 parts of sodium formaldehyde sulfoxylate, 28.8 parts of methacrylic acid and 8.2 parts of hydroxyethyl.
3. The dispersant for coal water slurry prepared by using the modified molasses of claim 1, wherein the raw material of the dispersant for coal water slurry comprises the following components in parts by weight: 80 parts of molasses, 21 parts of 32% liquid alkali, 8.3 parts of hydrogen peroxide, 380 parts of deionized water, 0.9 part of 3-mercaptopropionic acid, 400260 parts of monomer TPEG, 1.5 parts of sodium formaldehyde sulfoxylate, 25 parts of methacrylic acid and 7.6 parts of hydroxyethyl.
4. The dispersant for coal water slurry prepared by using the modified molasses of claim 1, wherein the raw material of the dispersant for coal water slurry comprises the following components in parts by weight: 30 parts of molasses, 6 parts of 32% liquid sodium hydroxide, 5 parts of 27% hydrogen peroxide, 430 parts of deionized water, 1 part of 3-mercaptopropionic acid, 600300 parts of monomer TPEG, 1.8 parts of sodium formaldehyde sulfoxylate, 30 parts of methacrylic acid and 6 parts of hydroxyethyl ester.
5. The dispersant for coal water slurry prepared by using the modified molasses as claimed in any one of claims 1-4, wherein the dispersant for coal water slurry is prepared by a method comprising the steps of:
1) pretreatment of molasses: putting molasses into a flask, heating to 50 ℃, adding 20-30 parts of deionized water, stirring and mixing uniformly, adding 32% liquid sodium hydroxide, cooling to below 35 ℃, adding 3-7 parts of hydrogen peroxide, stirring and reacting for 30-90min to obtain a modified primary product mo for later use;
2) preparing A, B materials: uniformly mixing 130-200 parts of deionized water, 3-mercaptopropionic acid and sodium formaldehyde sulfoxylate to obtain a material A; uniformly mixing 50-110 parts of deionized water, methacrylic acid and hydroxyethyl ester to obtain a material B;
3) taking a four-neck flask, adding 200-600 parts of monomer TPEG and 210 parts of 160-one-neck deionized water, uniformly stirring and mixing, adding the rest hydrogen peroxide, uniformly stirring and mixing, dripping A, B materials into the four-neck flask after 10min, wherein the dripping time of the material A is 2-4h, and the dripping time of the material B is 1.5-3.5 h;
4) and adding the modified primary product Mo after the dripping is finished, and continuously reacting for 1-3h to obtain the coal water slurry dispersing agent Mo.
6. The dispersant for coal water slurry prepared by using modified molasses as claimed in claim 5, wherein hydrogen peroxide is added in step 1) and the reaction time is 60min, and the reaction time in step 4) is 1.5 h.
7. The use of a dispersant for coal water slurry prepared with modified molasses according to any one of claims 1-4 and 6 for dispersing coal water slurry.
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| CN110054429A (en) * | 2019-04-24 | 2019-07-26 | 海南太和科技有限公司 | A kind of polycarboxylate water-reducer and preparation method thereof based on humic acid base polyether monomer |
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| CN104327280A (en) * | 2014-10-10 | 2015-02-04 | 华南理工大学 | Preparation method of alkali lignin modified polycarboxylic acid-type coal water slurry dispersant |
| CN107892735A (en) * | 2017-10-25 | 2018-04-10 | 武汉奥克化学有限公司 | A kind of Compositional type coal water slurry dispersing agent and preparation method thereof |
| CN109135852A (en) * | 2018-09-03 | 2019-01-04 | 宁夏宝塔石化煤化工研究院有限公司 | A kind of modification of molasses waste liquid and the preparation method of coal water slurry dispersing agent |
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Application publication date: 20200207 |