CN105018160A - Coal water slurry dispersant and its preparation method and use - Google Patents
Coal water slurry dispersant and its preparation method and use Download PDFInfo
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- CN105018160A CN105018160A CN201510354489.7A CN201510354489A CN105018160A CN 105018160 A CN105018160 A CN 105018160A CN 201510354489 A CN201510354489 A CN 201510354489A CN 105018160 A CN105018160 A CN 105018160A
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Abstract
The invention provides a coal water slurry dispersant and its preparation method and use. The coal water slurry dispersant is prepared by mixing reaction of aldehyde and lignosulfonate prepared from liquid glucose, wherein in the reaction, reaction pH is controlled in a range of 9-11 and the aldehyde comprises one or more of formaldehyde, acetaldehyde and propionaldehyde. The coal water slurry dispersant is used in coal water slurry so that the coal water slurry has high slurry concentration, has a small use amount, a low preparation cost and a wide raw material sources, and is conducive to industrial production.
Description
Technical field
The present invention relates to a kind of coal water slurry dispersing agent and its preparation method and application.
Background technology
Coal water slurry is a kind of novel Filter Tuber For Clean Coal base liquid fuel, the liquefied New-type fuel be made up of the coal of 60 ~ 70wt% certain particle size, the water of 30 ~ 40wt% and a small amount of additive, it had both maintained the original physico-chemical property of coal, can equally possess good rheological, thixotropy and stability by image-stone oil again, can pumping, spray burning, improve burning efficiency; When energy shortage instantly and problem of environmental pollution increasingly sharpen, coal water slurry receives increasing concern.
Dispersion agent is the key factor affecting coal water slurry performance, because coal water slurry is thermodynamic unstable system, low viscosity, high density, good mobility and stability are the of paramount importance performances of coal water slurry, coal is lyophobic dust, after adding dispersion agent, coal water termination character can be changed by the adsorption of dispersion agent on pulverized coal particle, a large amount of free-water is discharged, strengthen pulverized coal particle dispersion in aqueous, the coal water slurry prepared is made to have good rheological and stability, therefore, dispersion agent is one of its gordian technique.
At present, the main species of domestic and international coal water slurry dispersing agent has: 1) naphthalenesulfonate formaldehyde condensation compound; 2) copolymerization product of vinylformic acid and acrylic monomer; 3) polyolefin series; 4) carboxylic acid and series of phosphate; 5) humic acid and sulfonated humic acid series; 6) sulfonated lignin; At present, the additive that domestic production coal water slurry uses is held with naphthalene system dispersion agent, have the advantage that dispersing property is good, but its raw material is more expensive, and by toxicity; Be dispersion agent with phosphoric acid or humic acid material, although cost is lower, dispersing property is poor, and water-coal-slurry slurring concentration is low, or needs and the composite use of dispersant with high efficiency; And with lignin sulfonate material for dispersion agent slurrying also has report, as Jiang Hongyan. a kind of lignin type of report of the applied research of bamboo pulp Lignins dispersant with high efficiency in coal water slurry, but, its pulpability is still poor, dimension, seeks that a kind of preparation cost is low and pulpability is good coal water slurry dispersing agent is the current technical issues that need to address.
Summary of the invention
In view of this, technical problem to be solved by this invention is to provide a kind of coal water slurry dispersing agent, and coal water slurry dispersing agent provided by the invention not only cost is low, and consumption is few, slurry concentration is high.
The invention provides a kind of coal water slurry dispersing agent, obtained by the sulfonated lignin prepared by liquid glucose and aldehyde hybrid reaction;
The pH value of described reaction is 9 ~ 11;
Described aldehyde is one or more in formaldehyde, acetaldehyde and propionic aldehyde.
Preferably, the reagent that in described hybrid reaction, adjust ph is used is one or more in sodium hydroxide, potassium hydroxide, calcium hydroxide and magnesium hydroxide.
Preferably, the mass ratio of the described sulfonated lignin prepared by liquid glucose and described aldehyde is (40 ~ 60): (1 ~ 20).
Preferably, the mass ratio of the described sulfonated lignin prepared by liquid glucose and described aldehyde is (45 ~ 55): (5 ~ 10).
Preferably, the temperature of described hybrid reaction is 60 DEG C ~ 150 DEG C.
Preferably, the pH of described reaction most 9.5 ~ 10.5.
Preferably, described liquid glucose prepares the process of sulfonated lignin and is:
Liquid glucose is obtained sulfonated lignin by chromatographic separation;
The solid content of described liquid glucose is 35wt% ~ 65wt%, and the pH of liquid glucose is 4 ~ 7, and in liquid glucose, reducing sugar is greater than 16%.
Preferably, described liquid glucose is prepared in accordance with the following methods:
By the material containing xylogen and Compound-acid hybrid reaction, obtain liquid glucose;
Described Compound-acid comprises sulfurous gas, non-oxidizing acid and sulphite,
Described non-oxidizing acid is one or more in phosphoric acid, sulfuric acid, oxalic acid and acetic acid,
Described sulphite is one or more in S-WAT, potassium sulfite, magnesium sulfite and calcium sulfite.
Present invention also offers a kind of coal water slurry, comprising: coal water slurry dispersing agent provided by the invention, coal and water.
Preferably, the mass ratio of described coal water slurry dispersing agent and described coal is (0.2 ~ 0.3): 100.
Compared with prior art, the sulfonated lignin prepared by liquid glucose of coal water slurry dispersing agent provided by the invention and aldehyde hybrid reaction obtain; And be 9 ~ 11 by controlling the pH value of described reaction in the reaction; Described aldehyde is one or more in formaldehyde, acetaldehyde and propionic aldehyde; The coal water slurry dispersing agent prepared is made to be applied to the slurry concentration of the coal water slurry that coal water slurry makes to obtain high, and dispersant dosage is few, and the preparation cost of dispersion agent is low, wide material sources, be conducive to suitability for industrialized production, experimental result shows, the slurry concentration of coal water slurry provided by the invention reaches more than 61%, and mobility is B+.
Embodiment
The invention provides a kind of coal water slurry dispersing agent, obtained by the sulfonated lignin prepared by liquid glucose and aldehyde hybrid reaction;
The pH value of described reaction is 9 ~ 11;
Described aldehyde is one or more in formaldehyde, acetaldehyde and propionic aldehyde.
According to the present invention, obtain coal water slurry dispersing agent by the sulfonated lignin prepared by liquid glucose and aldehyde hybrid reaction, wherein, described aldehyde is one or more in formaldehyde, acetaldehyde and propionic aldehyde, is preferably one or both in formaldehyde and acetaldehyde; The reagent that in described hybrid reaction, adjust ph is used is preferably one or more in sodium hydroxide, potassium hydroxide, calcium hydroxide and magnesium hydroxide, is more preferably one or both in sodium hydroxide and potassium hydroxide; The mass ratio of the described sulfonated lignin prepared by liquid glucose and described aldehyde is preferably (40 ~ 60): (1 ~ 20), be more preferably (45 ~ 55): (5 ~ 10), most preferably be (48 ~ 53): (6 ~ 8);
The pH value of described hybrid reaction is preferably 9 ~ 11, is more preferably 9.5 ~ 10.5; The temperature of described reaction is 60 DEG C ~ 150 DEG C, is more preferably 70 DEG C ~ 130 DEG C, most preferably is 80 DEG C ~ 100 DEG C, is the most preferably 85 ~ 95 DEG C; The time of described reaction is preferably 1 ~ 12 hour, is more preferably 2 ~ 6 hours, most preferably is 3 ~ 4 hours.
And in order to can better react, the present invention preferably makes the solid content of the reaction solution of hybrid reaction be 40 ~ 60wt%, is more preferably 45 ~ 55wt%, most preferably is 48 ~ 53wt%.
Reaction solution after hybrid reaction is preferably also passed through spraying dry by the present invention, obtain coal water slurry dispersing agent, spray-dired method of the present invention is not particularly limited, spray drying process well known in the art, described spray-dired inlet temperature is preferably 260 DEG C ~ 280 DEG C, and air outlet temperature is preferably 80 DEG C ~ 100 DEG C.
The index of the coal water slurry dispersing agent that the present invention obtains is: moisture is less than 7, pH value is 5.5 ~ 8.5, reducing sugar content (accounting for butt) is for being less than or equal to 8wt%, and water-insoluble (accounting for butt) is for being less than or equal to 1%, and chlorion is less than or equal to 1.2%.
The process that described liquid glucose prepares sulfonated lignin is preferably:
Liquid glucose is obtained sulfonated lignin by chromatographic separation;
The solid content of described liquid glucose is 35wt% ~ 65wt%, and the pH of liquid glucose is 4 ~ 7, and in liquid glucose, reducing sugar is greater than 16%.
According to the present invention, the solid content of described liquid glucose is preferably wt40 ~ 50wt%; Described used in chromatograph resin is preferably one or more in sodium form resin, magnesium types resin, calcium type resin and potassium type resin; The temperature of described separation is preferably 30 ~ 90 DEG C, is more preferably 50 ~ 80 DEG C, and described velocity of separation is preferably 1 ~ 10m/h, is more preferably 2 ~ 6m/h; Described eluent is preferably distilled water.
In order to can better the sulfonated lignin in liquid glucose and wood sugar and other sugar be left, during liquid glucose preferably also carries out by the present invention before chromatographic separation and and filter, the reagent of described neutralization is preferably one or more in sodium hydroxide, magnesium oxide, calcium oxide and potassium hydroxide, the temperature of described neutralization reaction is preferably 30 ~ 80 DEG C, be more preferably 40 ~ 60 DEG C, most preferably be 45 ~ 55 DEG C; After described neutralization reaction, the pH of solution is to being preferably 2 ~ 6, is more preferably 3 ~ 5, most preferably is 4 ~ 5; The mode of described filtration is preferably precoating and drainage, is more preferably Plate Filtration or the filtration of candle formula; Described precoating paint is preferably one or more in diatomite, waste active carbon, perlite and xylose residue, is more preferably one or both in diatomite and waste active carbon; Described precoating amount is preferably 0 ~ 3kg/m
2, be more preferably 0.5 ~ 1.5kg/m
2; Described flocculating aids is one or more in diatomite, waste active carbon and perlite, is more preferably one or both in diatomite and waste active carbon; The temperature of described filtration is preferably 30 ~ 80 DEG C, is more preferably 40 ~ 60 DEG C, most preferably is 45 ~ 55 DEG C; The number of times of described filtration is preferably 1 ~ 4 time, is more preferably 2 ~ 3 times.
Described liquid glucose is preferably prepared in accordance with the following methods:
By the material containing xylogen and Compound-acid hybrid reaction, obtain liquid glucose;
Described Compound-acid comprises sulfurous gas, non-oxidizing acid and sulphite,
Described non-oxidizing acid is one or more in phosphoric acid, sulfuric acid, oxalic acid and acetic acid,
Described sulphite is one or more in S-WAT, potassium sulfite, magnesium sulfite and calcium sulfite.
Concrete, the present invention does not have particular requirement to the described material containing xylogen, is preferably selected from one or more in corn cob, reed, beans bar and cotton stalk; Be more preferably corn cob or reed; Most preferably be corn cob.Raw material of the present invention is preferably through pulverizing, and the order number that the present invention obtains for the instrument pulverized or pulverizing does not limit, the instrument that acidolysis well known to those skilled in the art is pulverized and order number.
Compound-acid described in the present invention comprises sulfurous gas, non-oxidizing acid and sulphite, and wherein, described non-oxidizing acid is one or more in phosphoric acid, sulfuric acid, oxalic acid and acetic acid; Preferably non-oxidizing acid is two or more in phosphoric acid, sulfuric acid, oxalic acid and acetic acid; Described sulphite is one or more in S-WAT, potassium sulfite, magnesium sulfite and calcium sulfite; Be preferably as two or more in S-WAT, potassium sulfite, magnesium sulfite and calcium sulfite; In described Compound-acid, the mass ratio of sulfurous gas, non-oxidizing acid is preferably (10 ~ 95): (2 ~ 50), be more preferably (50 ~ 90): (5 ~ 30), most preferably be (80 ~ 90): (6 ~ 20); The mol ratio of described sulfurous gas and sulphite is for being preferably (10 ~ 95): (0 ~ 10), be more preferably (50 ~ 90): (1 ~ 7), most preferably be (80 ~ 90): (2 ~ 3).
In the present invention, the described material containing xylogen mixes with Compound-acid and carries out acidolysis reaction, obtains liquid glucose; Wherein, be describedly preferably 1:(0.01 ~ 0.1 containing the material of xylogen and the mass ratio of Compound-acid), be more preferably 1:(0.03 ~ 0.08), most preferably be 1:(0.03 ~ 0.06); In order to make reaction better carry out, the content (i.e. solid content) adding water in mixed solution and make the solid in reaction system is also 2 ~ 100wt% by the present invention, is more preferably 4 ~ 90wt%, most preferably is 5.5 ~ 85wt%; The pressure of described reaction is preferably 0.2 ~ 1MPa, is more preferably 0.4 ~ 0.8MPa, most preferably is 0.5 ~ 0.7MPa.
In the present invention, said solid content refers to the mass ratio of reaction raw materials in reaction system and reaction solution (comprising reaction raw materials and solvent).
Present invention also offers a kind of coal water slurry, comprising: coal water slurry dispersing agent provided by the invention and coal are mixed to get; The mass ratio of described coal water slurry dispersing agent and described coal is preferably (0.2 ~ 0.3): 100, and the present invention does not have particular requirement to described coal, well known to a person skilled in the art the coal that may be used for preparing coal water slurry.
The sulfonated lignin that coal water slurry dispersing agent provided by the invention is prepared by liquid glucose and aldehyde hybrid reaction obtain; And be 9 ~ 11 by controlling the pH value of described reaction in the reaction; Described aldehyde is one or more in formaldehyde, acetaldehyde and propionic aldehyde; Make the coal water slurry dispersing agent prepared be applied to the slurry concentration of the coal water slurry that coal water slurry makes to obtain high, and dispersant dosage is few, and the preparation cost of dispersion agent is low, wide material sources, are conducive to suitability for industrialized production.
Technical scheme below in conjunction with the embodiment of the present invention is clearly and completely described, and obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
100g corn cob is pulverized, add 8g sulfurous acid, 1.4g phosphoric acid, 0.5g S-WAT 140 DEG C, be hydrolyzed under 05Mpa, after hydrolysis, solid-liquid separation, obtains liquid glucose and xylose residue; Merge liquid glucose, xylose residue adds 100 DEG C of washings of four times, after solid-liquid separation, obtains liquid glucose and xylose residue; Merge liquid glucose, xylose residue adds 100 DEG C of washings of twice, obtains xylose residue and liquid glucose after solid-liquid separation.
The liquid glucose obtained is condensed into the solution that solid content is 45wt%, then at 50 DEG C of sedimentation 48h, adds sodium hydroxide at 55 DEG C and carry out neutralization reaction, obtain the solution that pH value is 5.
The solution being 5 by the pH obtained carries out Plate Filtration 2 times, and the temperature of filtration is 50 DEG C, and the precoating paint of Plate Filtration is diatomite and waste active carbon, and precoating amount is 1kg/m
2, flocculating aids is diatomite, and add-on is 0.6% of liquid glucose quality, obtains the liquid glucose after filtering.
By the liquid glucose after filtration through chromatographic separation, obtain sodium lignosulfonate, wherein, the temperature of chromatographic separation is 70 DEG C, and the speed of separation is 4m/h, and washing and dehydrating integrated machine is water, and used in chromatograph resin is sodium form resin.
By sodium lignosulfonate 20g, 28g water obtained, massfraction be 2% aqueous sodium hydroxide solution and 0.25g formaldehyde in 85 DEG C of reaction 2h, and the add-on of sodium hydroxide is the pH most 9.5 making reaction system, pass through spraying dry after completion of the reaction, spray-dired inlet temperature is 260 DEG C, air outlet temperature is 80 DEG C, obtains coal water slurry dispersing agent.
By the coal water slurry dispersing agent 0.3g obtained, Yanzhou coal 100g, water 62g, prepares coal water slurry; Namely, when preparing coal water slurry, the consumption of coal water slurry dispersing agent is 0.3% of butt coal dust weight
Analyze the coal water slurry obtained, result shows, its slurry concentration is 61.8%, and apparent viscosity is 1100 centipoises, and mobility is B+, and 24 hours stability is B level.
Embodiment 2
100g corn cob is pulverized, add 6.5g sulfurous acid, 1.5g oxalic acid, 0.55g S-WAT 160 DEG C, be hydrolyzed under 0.5Mpa, after hydrolysis, solid-liquid separation, obtains liquid glucose and xylose residue; Merge liquid glucose, xylose residue adds 100 DEG C of washings of four times, after solid-liquid separation, obtains liquid glucose and xylose residue; Merge liquid glucose, xylose residue adds 100 DEG C of washings of twice, obtains xylose residue and liquid glucose after solid-liquid separation.
The liquid glucose obtained is condensed into the solution that solid content is 45wt%, then at 50 DEG C of sedimentation 48h, adds sodium hydroxide at 55 DEG C and carry out neutralization reaction, obtain the solution that pH value is 5.
The solution being 5 by the pH obtained carries out Plate Filtration 2 times, and the temperature of filtration is 50 DEG C, and the precoating paint of Plate Filtration is diatomite and waste active carbon, and precoating amount is 1kg/m
2, flocculating aids is diatomite, and add-on is 0.6% of liquid glucose quality, obtains the liquid glucose after filtering.
By the liquid glucose after filtration through chromatographic separation, obtain sodium lignosulfonate, wherein, the temperature of chromatographic separation is 70 DEG C, and the speed of separation is 4m/h, and washing and dehydrating integrated machine is water, and used in chromatograph resin is sodium form resin.
By sodium lignosulfonate 25g, 28g water obtained, massfraction be 2% aqueous sodium hydroxide solution and 0.3g formaldehyde in 85 DEG C of reaction 2h, and the add-on of sodium hydroxide is the pH most 9.5 making reaction system, pass through spraying dry after completion of the reaction, spray-dired inlet temperature is 260 DEG C, air outlet temperature is 80 DEG C, obtains coal water slurry dispersing agent.
By the coal water slurry dispersing agent 0.3g obtained, Factory, Shenmu, Shanxi coal 100g, water 59.2g, prepares coal water slurry;
Analyze the coal water slurry obtained, result shows, its slurry concentration is 62.9, and apparent viscosity is 1120 centipoises, and mobility is B+, and 24 hours stability is B level.
Embodiment 3
300g corn cob is pulverized, add 10g sulfurous acid, 5g sulfuric acid, 1.3g S-WAT 150 DEG C, be hydrolyzed under 0.6Mpa, after hydrolysis, solid-liquid separation, obtains liquid glucose and xylose residue; Merge liquid glucose, xylose residue adds 100 DEG C of washings of four times, after solid-liquid separation, obtains liquid glucose and xylose residue; Merge liquid glucose, xylose residue adds 100 DEG C of washings of twice, obtains xylose residue and liquid glucose after solid-liquid separation.
The liquid glucose obtained is condensed into the solution that solid content is 45wt%, and then at 50 DEG C of sedimentation 48h, 55 DEG C add sodium hydroxide and carry out neutralization reaction, obtain the solution that pH value is 4.
The solution being 5 by the pH obtained carries out Plate Filtration 2 times, and the temperature of filtration is 50 DEG C, and the precoating paint of Plate Filtration is diatomite and waste active carbon, and precoating amount is 1kg/m
2, flocculating aids is diatomite, and add-on is 0.6% of liquid glucose quality, obtains the liquid glucose after filtering.
By the liquid glucose after filtration through chromatographic separation, obtain sodium lignosulfonate, wherein, the temperature of chromatographic separation is 70 DEG C, and the speed of separation is 4m/h, and washing and dehydrating integrated machine is water, and used in chromatograph resin is sodium form resin.
By sodium lignosulfonate 25g, 25g water obtained, massfraction be 2% aqueous sodium hydroxide solution and 0.4g formaldehyde in 95 DEG C of reaction 2h, and the add-on of sodium hydroxide is the pH most 9.5 making reaction system, pass through spraying dry after completion of the reaction, spray-dired inlet temperature is 260 DEG C, air outlet temperature is 80 DEG C, obtains coal water slurry dispersing agent.
By the coal water slurry dispersing agent 0.3g obtained, Huating Gansu coal 100g, water 57.5g, prepares coal water slurry;
The Quality Index Analysis of coal:
Analyze the coal water slurry obtained, result shows, its slurry concentration is 63.6%, and apparent viscosity is 1150 centipoises, and mobility is A, and 24 hours stability is B level.
Embodiment 4
300g corn cob is pulverized, add 10g sulfurous acid, 5g acetic acid, 1.3g S-WAT 150 DEG C, be hydrolyzed under 0.6Mpa, after hydrolysis, solid-liquid separation, obtains liquid glucose and xylose residue; Merge liquid glucose, xylose residue adds 100 DEG C of washings of four times, after solid-liquid separation, obtains liquid glucose and xylose residue; Merge liquid glucose, xylose residue adds 100 DEG C of washings of twice, obtains xylose residue and liquid glucose after solid-liquid separation.
The liquid glucose obtained is condensed into the solution that solid content is 45wt%, and then at 50 DEG C of sedimentation 48h, 55 DEG C add sodium hydroxide and carry out neutralization reaction, obtain the solution that pH value is 5.
The solution being 5 by the pH obtained carries out Plate Filtration 2 times, and the temperature of filtration is 50 DEG C, and the precoating paint of Plate Filtration is diatomite and waste active carbon, and precoating amount is 1kg/m
2, flocculating aids is diatomite, and add-on is 0.6% of liquid glucose quality, obtains the liquid glucose after filtering.
By the liquid glucose after filtration through chromatographic separation, obtain sodium lignosulfonate, wherein, the temperature of chromatographic separation is 70 DEG C, and the speed of separation is 4m/h, and washing and dehydrating integrated machine is water, and used in chromatograph resin is sodium form resin.
By sodium lignosulfonate 25g, 23g water obtained, massfraction be 2% aqueous sodium hydroxide solution and 0.35g formaldehyde in 95 DEG C of reaction 2h, and the add-on of sodium hydroxide is the pH most 9.5 making reaction system, pass through spraying dry after completion of the reaction, spray-dired inlet temperature is 260 DEG C, air outlet temperature is 80 DEG C, obtains coal water slurry dispersing agent.
By the coal water slurry dispersing agent 0.3g obtained, shenfu coal 100g, water 60.5g, prepares coal water slurry;
Analyze the coal water slurry obtained, result shows, its slurry concentration is 62.4%, and apparent viscosity is 1105 centipoises, and mobility is B+, and 24 hours stability is B level.
Embodiment 5
300g corn cob is pulverized, add 10g sulfurous acid, 2g acetic acid, 3g sulfuric acid, 1.3g S-WAT 150 DEG C, be hydrolyzed under 0.6Mpa, after hydrolysis, solid-liquid separation, obtains liquid glucose and sugared slag; Merge liquid glucose, sugared slag adds 100 DEG C of washings of four times, after solid-liquid separation, obtains liquid glucose and sugared slag; Merge liquid glucose, sugared slag adds 100 DEG C of washings of twice, obtains liquid glucose after solid-liquid separation, merges and obtains liquid glucose.
The liquid glucose obtained is condensed into the solution that solid content is 45wt%, and then at 50 DEG C of sedimentation 48h, 55 DEG C add sodium hydroxide and carry out neutralization reaction, obtain the solution that pH value is 5.
The solution being 5 by the pH obtained carries out Plate Filtration 2 times, and the temperature of filtration is 50 DEG C, and the precoating paint of Plate Filtration is diatomite and waste active carbon, and precoating amount is 1kg/m
2, flocculating aids is diatomite, and add-on is 0.6% of liquid glucose quality, obtains the liquid glucose after filtering.
By the liquid glucose after filtration through chromatographic separation, obtain sodium lignosulfonate, wherein, the temperature of chromatographic separation is 70 DEG C, and the speed of separation is 4m/h, and washing and dehydrating integrated machine is water, and used in chromatograph resin is sodium form resin.
By sodium lignosulfonate 25g, 26g water obtained, massfraction be 2% aqueous sodium hydroxide solution and 0.35g formaldehyde in 85 DEG C of reaction 2h, and the add-on of sodium hydroxide is the pH most 9.5 making reaction system, pass through spraying dry after completion of the reaction, spray-dired inlet temperature is 260 DEG C, air outlet temperature is 80 DEG C, obtains coal water slurry dispersing agent.
By the coal water slurry dispersing agent 0.3g obtained, Yanzhou coal 100g, water 59.8g, prepares coal water slurry;
Analyze the coal water slurry obtained, result shows, its slurry concentration is 62.65%, and apparent viscosity is 1050 centipoises, and mobility is A level, and 24 hours stability is B level.
The explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a coal water slurry dispersing agent, is obtained by the sulfonated lignin prepared by liquid glucose and aldehyde hybrid reaction;
The pH value of described reaction is 9 ~ 11;
Described aldehyde is one or more in formaldehyde, acetaldehyde and propionic aldehyde.
2. coal water slurry dispersing agent according to claim 1, is characterized in that, the reagent that in described hybrid reaction, adjust ph is used is one or more in sodium hydroxide, potassium hydroxide, calcium hydroxide and magnesium hydroxide.
3. coal water slurry dispersing agent according to claim 1, is characterized in that, the mass ratio of the described sulfonated lignin prepared by liquid glucose and described aldehyde is (40 ~ 60): (1 ~ 20).
4. coal water slurry dispersing agent according to claim 1, is characterized in that, the mass ratio of the described sulfonated lignin prepared by liquid glucose and described aldehyde is (45 ~ 55): (5 ~ 10).
5. coal water slurry dispersing agent according to claim 1, is characterized in that, the temperature of described hybrid reaction is 60 DEG C ~ 150 DEG C.
6. coal water slurry dispersing agent according to claim 1, is characterized in that, the pH of described reaction most 9.5 ~ 10.5.
7. coal water slurry dispersing agent according to claim 1, is characterized in that, the process that described liquid glucose prepares sulfonated lignin is:
Liquid glucose is obtained sulfonated lignin by chromatographic separation;
The solid content of described liquid glucose is 35wt% ~ 65wt%, and the pH of liquid glucose is 4 ~ 7, and in liquid glucose, reducing sugar is greater than 16%.
8. coal water slurry dispersing agent according to claim 1, is characterized in that, described liquid glucose is prepared in accordance with the following methods:
By the material containing xylogen and Compound-acid hybrid reaction, obtain liquid glucose;
Described Compound-acid comprises sulfurous gas, non-oxidizing acid and sulphite,
Described non-oxidizing acid is one or more in phosphoric acid, sulfuric acid, oxalic acid and acetic acid,
Described sulphite is one or more in S-WAT, potassium sulfite, magnesium sulfite and calcium sulfite.
9. a coal water slurry, comprising: the coal water slurry dispersing agent described in claim 1 ~ 8 any one, coal and water.
10. coal water slurry according to claim 9, is characterized in that, the mass ratio of described coal water slurry dispersing agent and described coal is (0.2 ~ 0.3): 100.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109897186A (en) * | 2017-12-11 | 2019-06-18 | 神华集团有限责任公司 | Preparation method of the modified lignosulfonates of beta-cyclodextrin and its preparation method and application with water-coal-slurry |
| CN114558880A (en) * | 2022-03-14 | 2022-05-31 | 武汉理工大学 | Surfactant suitable for red mud dealkalization and red mud dealkalization method |
| CN114558880B (en) * | 2022-03-14 | 2024-04-16 | 武汉理工大学 | Surfactant suitable for dealkalization of red mud and dealkalization method of red mud |
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