CN109970910A - A kind of ter-polymers coal water slurry dispersing agent and the application in water-coal-slurry preparation - Google Patents
A kind of ter-polymers coal water slurry dispersing agent and the application in water-coal-slurry preparation Download PDFInfo
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- CN109970910A CN109970910A CN201910244699.9A CN201910244699A CN109970910A CN 109970910 A CN109970910 A CN 109970910A CN 201910244699 A CN201910244699 A CN 201910244699A CN 109970910 A CN109970910 A CN 109970910A
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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
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/04—Anhydrides, e.g. cyclic anhydrides
- C08F222/06—Maleic anhydride
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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
- C08F8/00—Chemical modification by after-treatment
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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
- C10L1/22—Organic compounds containing nitrogen
- C10L1/234—Macromolecular compounds
- C10L1/236—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derivatives thereof
- C10L1/2364—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derivatives thereof homo- or copolymers derived from unsaturated compounds containing amide and/or imide groups
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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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Abstract
The present invention is a kind of water-coal-slurry ter-polymers dispersing agent for coal chemical technology, mainly pass through tannic acid (TA), 2- acrylamide-2-methyl propane sulfonic (AMPS), maleic anhydride (MA) graft copolymerization, obtains a kind of novel tertiary polymer.Primary raw material tannic acid of the invention is natural macromolecular, from a wealth of sources, and price inexpensively, by the chemical modification to tannin natural molecule, introduces a variety of functional groups, and be used for water-coal-slurry slurring.Test result shows that fixed dispersing agent usage amount is the 1.5 ‰ of dry coal quality, 62% concentration coal slurry is made, mobility, viscosity and stability are preferable, and 65% concentration coal slurry can be made in highest.This synthesis technology is simple, and obtained coal slurry is functional, there is certain market potential.
Description
Technical field
The present invention relates to technical field of coal chemical industry, are related to a kind of dispersing agent, more particularly relate to the dispersing agent of water-coal-slurry.
Technical background
Water-coal-slurry is to be obtained by the coal of about 60-65%, the water of 34-39% and 1% additive by Physical Processing
A kind of low pollution, high efficiency, can pipeline generation oily coal based fluid fuel.It changes the traditional combustion mode of coal, display
Huge environmental protection and energy saving advantage is gone out.Especially in recent years, after using the technology path of waste resource recovery, the ring succeeded in developing
It is retained coal slurry, the environmental benefit of water-coal-slurry can be substantially increased under the premise of not increase expense.Coal money is enriched in China
Under the guarantee in source, water-coal-slurry also has become most basic, the most economical clear energy sources of the energy such as substitution oil, gas.Water-coal-slurry addition
Agent has dispersing agent, stabilizer and some other assistant chemical medicament, such as defoaming agent, pH regulator, anti-enzyme by its function difference
Agent, surface modifier and promotor etc. are a variety of.Wherein it is essential that dispersing agent and stabilizer.
Ionic and non-ionic two major classes can be divided into whether dispersing agent is by dissociation.Ionic again can be by the attribute of charge point
For anionic, cationic and amphoteric three classes.Amphoteric, which refers to, shows anion characteristic when solution alkaline, in acidity
When show cationic characteristic.Anion, nonionic, cation and amphoteric dispersant international price ratio be 1:2:3:4.Slurrying
Dispersing agent more options anionic.Anionic dispersing agent mainly have naphthalene sulfonate, lignosulfonates, sulfonation humic acid salt,
Polycarboxylic-acid etc..Amphoteric dispersant is because expensive, without great practical application in industry.The anionic of application is put into
Dispersing agent is for example above-mentioned, most of to be used alone although price is inexpensively, needs the compounding of several additives, this nothing
Economic cost is increased in shape again.
Therefore, find that a kind of raw material sources are extensive, and synthesis technology is simple, it is cheap, it can be taken into account in performance traditional
The modification slurrying dispersing agent of dispersing agent performance more has realistic meaning.
Nature has a large amount of biomass, and product price is cheap.They are all often organic macromolecules, are contained in structure
A large amount of functional group has the characteristics of certain surfactant structures, thus be expected to provide by the method for chemical modification it is high its
Performance.Tannic acid is that one kind is widely present in natural plant leaf, seed and the macromolecular in tissue such as spends, and has polyphenol structure
The characteristics of, molecular weight 1701.Tannic acid has very strong hydrophily due to containing multiple hydroxyls.However, coal surface is main
It is used to prepare coal slurry directly as additive, then is difficult to coal grain if not carrying out structural modification to tannic acid for hydrophobic structure
Peptizaiton is played, more without stabilization, but because the functional group of modified tannin introducing is very little, does not reach excellent drop
Viscous effect.
Summary of the invention
Therefore it is modified to tannin a variety of functional groups to be introduced by graft copolymerization, can prepare take into account stability of coal slurry with
The excellent additive of viscosity reducing effect.
The coal-slurry dispersing agent involved in the present invention arrived is tannic acid modified dispersing agent, is a kind of anionic dispersing agent.This
The invention concrete technical problems to be solved are how the structure of tannic acid to be chemically modified and is modified, and synthesis improves water-coal-slurry
Stability and the dispersing agent for reducing viscosity in aqueous coal slurries, make modified tannic acid can be effectively reduced the viscosity of water-coal-slurry, and energy
The stability for increasing water-coal-slurry, is suitable for being mass produced.
Tannic acid is modified by graft copolymerization with purpose, the present invention in view of the above problems, contains it suitable
The polar group and hydrophobic grouping of amount.
A kind of ter-polymers coal water slurry dispersing agent, using tannic acid as reaction raw materials, by with 2- acrylamide -2- methyl
Propane sulfonic acid, maleic anhydride graft copolymerization obtain a kind of novel tertiary polymer.
The tannic acid, 2- acrylamide-2-methyl propane sulfonic, maleic anhydride mass ratio be 1:1:1-3.Described
Tannic acid, 2- acrylamide-2-methyl propane sulfonic, maleic anhydride use potassium peroxydisulfate copolymerized grafting in the case where temperature is 60-100 DEG C
Obtain ter-polymers coal water slurry dispersing agent.The additive amount of the potassium peroxydisulfate is tannic acid, 2- acrylamide -2- methyl-prop
The 5%-7% of sulfonic acid, maleic anhydride gross mass.
The present invention obtains a kind of ternary polymerization dispersing agent, specific experiment using tannic acid as raw material, by graft copolymerization
Divide following several steps:
(1) a certain amount of maleic anhydride (MA), 2- acrylamide-2-methyl propane sulfonic is added in dissolution of raw material in flask
(AMPS) and deionized water, 50 DEG C are warming up to, is completely dissolved to powder in bottle, is warming up to 60-100 DEG C.
(2) tannin (TA) solution and potassium peroxydisulfate (KPS) is added dropwise after the completion of step (1) in Macroscopic single crystal simultaneously respectively
Solution reacts the 3.5-4.5h time, obtains yellowish brown viscous product；
(3) additive extract, yellowish brown viscous product is neutralized to after pH=9.0 at normal temperature filter out it is not soluble in water
Impurity obtains dark brown solution crude product, and enriched product is repeatedly washed with ethyl alcohol, obtains ter-polymers after air drying and adds
Add agent.
The water-coal-slurry modified additive that the above method is prepared, yield are up to 86%, with Ningxia Tai Xi coal slurrying, slurrying
Concentration is 62%, and additive usage amount (coal quality accounting) is 1.5 ‰, at normal temperature, with Shanghai Changji NDJ-5S rotary viscosity
Instrument (use No. 2 rotors, revolving speed 12r/min), measurement viscosity of coal slurry are 450-700mPa.s, good fluidity, and after placement 7d
Syneresis rate is 3% or so.In a preferred approach, additive usage amount (coal quality accounting) is 1.2 ‰, and highest can be made concentration and be
65% water-coal-slurry.
The synthetic method involved in the present invention arrived, the synthetic technology route and device of use are simple, and made dispersing agent is used
It is prepared in water-coal-slurry, has dosage few, the features such as viscosity reduction and excellent dispersibility.The raw material tannic acid especially used belongs to naturally
Biomass, abundance is cheap, meets environmentally friendly standard, is suitble to large-scale production, there is preferable market potential.
Specific embodiment
Below with reference to specific embodiment, invention is further explained.
Embodiment 1
250ml three-necked flask is taken, is placed in water-bath, to middle addition 18gMA, 6gAMPS and 40ml deionized water is risen
For temperature to 50 DEG C, mixing speed is 300r/min, is completely dissolved to powder in bottle, is warming up to 70 DEG C.From two dropping funels point
Not Jia Ru TA and KPS solution, wherein TA solution by 6gTA and 20ml deionized water with, KPS solution is gone by 1.8gKPS and 40ml
Ionized water is matched, and two kinds of solution drip off within half an hour, continues to keep the temperature 4h, to after reaction, stop heating and stirring,
It is cooled to room temperature down, yellowish-brown product is neutralized to pH=9 and filters out impurity not soluble in water, the ternary for obtaining brownish black is total
Copolymer solution after vacuum distillation and with ethanol washing three times obtains the dispersing agent after air drying.Performance test: one is taken
Quantitative Ningxia Tai Xi coal coal dust, above-mentioned additive usage amount are the 1.5 ‰ of quality of pc, and concentration is made for 62% coal slurry, after 5h
It carries out, measures viscosity of coal slurry with Shanghai Changji NDJ-5S type rotary viscometer (using No. 2 rotors, revolving speed 12r/min), and observe
Then its mobile performance is placed under sealing condition, the syneresis rate of the water-coal-slurry after the 7d time is placed in measurement, and syneresis rate can react
The stability of water-coal-slurry, syneresis rate is lower, indicates that water coal slurry stability is better.
METHOD FOR CONTINUOUS DETERMINATION seven days.Measuring temperature condition is room temperature, and measurement result is as shown in table 1.
Embodiment 2
250ml three-necked flask is taken, is placed in water-bath, to middle addition 18gMA, 6gAMPS and 40ml deionized water is risen
For temperature to 50 DEG C, mixing speed is 300r/min, is completely dissolved to powder in bottle, is warming up to 80 DEG C.From two dropping funels point
Not Jia Ru TA and KPS solution, wherein TA solution by 6gTA and 20ml deionized water with, KPS solution is gone by 1.8gKPS and 40ml
Ionized water is matched, and two kinds of solution drip off within half an hour, continues to keep the temperature 3h, to after reaction, stop heating and stirring,
It is cooled to room temperature down, yellowish-brown product is neutralized to pH=9 and filters out impurity not soluble in water, the ternary for obtaining brownish black is total
Copolymer solution after vacuum distillation and with ethanol washing three times obtains the additive after air drying.According to embodiment 1
Measuring method, measurement result are as shown in table 1.
Embodiment 3
250ml three-necked flask is taken, is placed in water-bath, to middle addition 15gMA, 7.5gAMPS and 40ml deionized water,
50 DEG C are warming up to, mixing speed is 300r/min, is completely dissolved to powder in bottle, is warming up to 70 DEG C.From two dropping funels
Be separately added into TA and KPS solution, wherein TA solution by 7.5gTA and 20ml deionized water with, KPS solution by 1.8gKPS and
40ml deionized water is matched, and two kinds of solution drip off within half an hour, continues to keep the temperature 3h, to after reaction, stop heating
And stirring, it is cooled to room temperature down, yellowish-brown product is neutralized to pH=9 and filters out impurity not soluble in water, obtains brownish black
Terpolymer solution after vacuum distillation and with ethanol washing three times obtain the additive after air drying.According to reality
The measuring method of example 1 is applied, measurement result is as shown in table 1.
Embodiment 4
250ml three-necked flask is taken, is placed in water-bath, to middle addition 15gMA, 7.5gAMPS and 40ml deionized water,
50 DEG C are warming up to, mixing speed is 300r/min, is completely dissolved to powder in bottle, is warming up to 90 DEG C.From two dropping funels
Be separately added into TA and KPS solution, wherein TA solution by 7.5gTA and 20ml deionized water with, KPS solution by 1.8gKPS and
40ml deionized water is matched, and two kinds of solution drip off within half an hour, continues to keep the temperature 4.5h, is added to after reaction, stop
Heat and stirring, are cooled to room temperature down, yellowish-brown product are neutralized to pH=9 and filters out impurity not soluble in water, is obtained dark brown
The terpolymer solution of color after vacuum distillation and with ethanol washing three times obtains the additive after air drying.According to
The measuring method of embodiment 1, measurement result are as shown in table 1.
Embodiment 5
250ml three-necked flask is taken, is placed in water-bath, to middle addition 18gMA, 6gAMPS and 40ml deionized water is risen
For temperature to 50 DEG C, mixing speed is 300r/min, is completely dissolved to powder in bottle, is warming up to 70 DEG C.From two dropping funels point
Not Jia Ru TA and KPS solution, wherein TA solution by 6gTA and 20ml deionized water with, KPS solution is gone by 2.1gKPS and 40ml
Ionized water is matched, and two kinds of solution drip off within half an hour, continues to keep the temperature 4.5h, to after reaction, stop heating and stir
It mixes, is cooled to room temperature down, yellowish-brown product is neutralized to pH=9 and filters out impurity not soluble in water, obtain the three of brownish black
Membered copolymer solution after vacuum distillation and with ethanol washing three times obtains the additive after air drying.According to embodiment
1 measuring method, measurement result are as shown in table 1.
Embodiment 6
250ml three-necked flask is taken, is placed in water-bath, to middle addition 18gMA, 6gAMPS and 40ml deionized water is risen
For temperature to 50 DEG C, mixing speed is 300r/min, is completely dissolved to powder in bottle, is warming up to 70 DEG C.From two dropping funels point
Not Jia Ru TA and KPS solution, wherein TA solution by 6gTA and 20ml deionized water with, KPS solution is gone by 1.8gKPS and 40ml
Ionized water is matched, and two kinds of solution drip off within half an hour, continues to keep the temperature 4.5h, to after reaction, stop heating and stir
It mixes, is cooled to room temperature down, yellowish-brown product is neutralized to pH=9 and filters out impurity not soluble in water, obtain the three of brownish black
Membered copolymer solution after vacuum distillation and with ethanol washing three times obtains the additive after air drying.According to embodiment
1 measuring method, measurement result are as shown in table 1.
Embodiment 7
According to 6 synthesis of ternary copolymer of embodiment, 63% concentration coal slurry is prepared according to embodiment 1 and measures coal slurry, is measured
The results are shown in Table 1.
Embodiment 8
According to 6 synthesis of ternary copolymer of embodiment, 64% concentration coal slurry is prepared according to embodiment 1 and measures coal slurry, is measured
The results are shown in Table 1.
Embodiment 9
According to 6 synthesis of ternary copolymer of embodiment, 65% concentration coal slurry is prepared according to embodiment 1 and measures coal slurry, is measured
The results are shown in Table 1.
Table 1
Claims (7)
1. a kind of ter-polymers coal water slurry dispersing agent, which is characterized in that using tannic acid as reaction raw materials, by with 2- acryloyl
Amine -2- methyl propane sulfonic acid, maleic anhydride graft copolymerization obtain a kind of novel tertiary polymer.
2. ter-polymers coal water slurry dispersing agent according to claim 1, which is characterized in that tannic acid, 2- acrylamide-
2- methyl propane sulfonic acid, maleic anhydride mass ratio be 1:1:1-3.
3. ter-polymers coal water slurry dispersing agent according to claim 1, which is characterized in that tannic acid, 2- acrylamide-
2- methyl propane sulfonic acid, maleic anhydride use potassium peroxydisulfate for initiator, and copolymerized grafting obtains ternary at being 60-100 DEG C in temperature
Polymer water coal-slurry dispersing agent.
4. ter-polymers coal water slurry dispersing agent according to claim 3, which is characterized in that the potassium peroxydisulfate adds
Dosage be tannic acid, 2- acrylamide-2-methyl propane sulfonic, maleic anhydride gross mass 5%-7%.
5. ter-polymers coal water slurry dispersing agent according to claim 3, which is characterized in that before copolymerized grafting, first by horse
To be uniformly dissolved at acid anhydrides, 2- acrylamide-2-methyl propane sulfonic and deionized water are 45-50 DEG C in temperature, then is warming up to 60-
After 100 DEG C, while tannin aqueous acid and potassium persulfate solution is added dropwise, answers the 3-4.5h time, obtains yellowish brown viscous product；It will
Dark brown solution crude product, enriched product is obtained by filtration after being neutralized to pH=8.8-9.0 at normal temperature in the yellowish brown viscous product
It is repeatedly washed with ethyl alcohol, ter-polymers dispersing agent is obtained after air drying.
6. application of the ter-polymers coal water slurry dispersing agent according to claim 1-5 in water-coal-slurry preparation.
7. application according to claim 6, which is characterized in that fixed additive usage amount is the 1.2- of dry coal quality
1.5‰。
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| CN201910244699.9A CN109970910B (en) | 2019-03-28 | 2019-03-28 | Terpolymer coal water slurry dispersing agent and application thereof in coal water slurry preparation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111019060A (en) * | 2019-12-12 | 2020-04-17 | 贵州师范学院 | Preparation method of tannic acid base star-shaped polycarboxylate superplasticizer |
| CN111320728A (en) * | 2020-03-20 | 2020-06-23 | 陕西科技大学 | Amphoteric tannin-based coal tar pitch water slurry dispersing agent and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108456282A (en) * | 2018-03-07 | 2018-08-28 | 陕西科技大学 | A kind of saponin(e graft copolymer coal water slurry dispersant and preparation method thereof |
| CN108467760A (en) * | 2018-03-21 | 2018-08-31 | 陕西科技大学 | A kind of tannic acid graft copolymer coal water slurry dispersant and preparation method thereof |
-
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- 2019-03-28 CN CN201910244699.9A patent/CN109970910B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108456282A (en) * | 2018-03-07 | 2018-08-28 | 陕西科技大学 | A kind of saponin(e graft copolymer coal water slurry dispersant and preparation method thereof |
| CN108467760A (en) * | 2018-03-21 | 2018-08-31 | 陕西科技大学 | A kind of tannic acid graft copolymer coal water slurry dispersant and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 周春明: "《中国优秀硕士学位论文全文数据库 工程科技I辑》", 15 September 2015 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111019060A (en) * | 2019-12-12 | 2020-04-17 | 贵州师范学院 | Preparation method of tannic acid base star-shaped polycarboxylate superplasticizer |
| CN111320728A (en) * | 2020-03-20 | 2020-06-23 | 陕西科技大学 | Amphoteric tannin-based coal tar pitch water slurry dispersing agent and preparation method thereof |
| CN111320728B (en) * | 2020-03-20 | 2022-06-21 | 陕西科技大学 | Amphoteric tannin-based coal tar pitch water slurry dispersing agent and preparation method thereof |
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