CN102936510A - Method for extracting higher aliphatic compound from lignite - Google Patents
Method for extracting higher aliphatic compound from lignite Download PDFInfo
- Publication number
- CN102936510A CN102936510A CN2012104154457A CN201210415445A CN102936510A CN 102936510 A CN102936510 A CN 102936510A CN 2012104154457 A CN2012104154457 A CN 2012104154457A CN 201210415445 A CN201210415445 A CN 201210415445A CN 102936510 A CN102936510 A CN 102936510A
- Authority
- CN
- China
- Prior art keywords
- toluene
- extraction
- potheater
- coal
- alkali cleaning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention provides a method for extracting a higher aliphatic compound from lignite. The invention belongs to the technical field of lignite graded utilization. According to the extraction method, lignite is subjected to hot extraction by using a toluene/methanol mixed extractant, such that a mixed extraction product is obtained; all methanol and a small amount of toluene solvent is recovered by distillation under 65 DEG C; the extraction product with methanol removed is sequentially subjected to phenol alkaline elution and residual-toluene distillation recovery, such that the higher aliphatic compound is obtained. The method provided by the invention has the advantages of short process, high extraction rate, convenient operation, environment friendliness, and no pollution. The solvent can be recycled. The obtained higher aliphatic compound is composed of higher straight-chain aliphatic hydrocarbon and higher fatty acid methyl ester, and can be directly used in fine chemicals such as lignite wax. Also, higher aliphatic hydrocarbon and higher fatty acid methyl ester can be further separated, and an added value is high.
Description
Technical field
The invention belongs to the brown coal classification and utilize technical field, be specifically related to a kind of method of from brown coal, extracting senior fatty compounds.
Background technology
Brown coal are low price coals of a kind of youth, have reserves large (it is 1,303 hundred million tons that China has verified the brown coal retained reserve), coal seam shallow (easily realizing strip mining transformation) and the low characteristics of cost.Simultaneously, brown coal high-moisture, low heat value, poor heat stability, easily oxidation and spontaneous combustion serious restricted that brown coal are efficient, clean utilization.General brown coal are mainly used near coal-mine combustion power generation, are used on a small quantity the low temperature coking and prepare blue charcoal and solvent extraction production montanin wax etc.Yet because the brown coal degree of coalification is low, elementary composition H/C is high, contains a large amount of senior lipid structures, has higher chemical reactivity, is easy to hydrogenation liquefaction and produces liquid fuel and fine chemicals.So brown coal are not only a kind of important energy, and it is a kind of organic carbon resource of preciousness.
It is one of important brown coal high value added utilization technology that the brown coal organic solvent extraction is produced montanin wax.Common montanin wax extraction solvent comprises toluene (seeing Chinese patent CN 101497817), toluene and alcohols mixed solvent (seeing Chinese patent CN 101497818), hexanaphthene and the mixed solvents (seeing Chinese patent CN 101906320), 1 such as alcohols mixed solvent (seeing Chinese patent CN 101029255), Virahol and hydrocarbon, 2-dichloro hexane and pure mixed solvent (seeing Chinese patent CN101407732).Extraction temperature is below 100 ℃ in the above-mentioned solvent, and the montanin wax mass yield only is 4 ~ 7 %.Texture of coal research is found, because brown coal are mainly covalently cross-linked macromolecular network structure, and there is a large amount of hydrogen bond actions, thereby cause the brown coal swelling behavior poor, solvent permeates, spreads difficulty in brown coal, so the micromolecular compounds such as montanin wax that exist with the non covalent bond effect in the brown coal are difficult to be extracted.
Utilize high boiling point aromaticity solvent to carry out the high temperature thermosol extraction of coal, can promote covalent bond cross-linked structure thermo-cracking and hydrocracking in the coal, significantly improve coal solvent extraction rate.US 4,443, and 321 utilize toluene under 450 ℃ of conditions coal to be carried out supercritical extraction, and percentage extraction can reach 50%; US 5,110, and 451 provide and utilize W and Mo catalytic hydrogen supply solvent to carry out the extracting process of coal under a kind of 400 ℃ of conditions, have realized the extraction liquefaction of coal.In addition, document (Proceedings of the 15
ThPittsburgh coal conference, Pittsburgh, 1998) provide a kind of high temperature thermosol extracting process of coal, utilize the high boiling solvents such as light cycle, carbolineum, methylnaphthalene oil, carry out pressurized heat extraction under the pyrolysis of coal temperature condition being higher than, significantly improved the percentage extraction of coal, the gained extract can prepare chemical or as ultra-clean coal (Hypercoal).Yet, contain a large amount of aromatic compounds in the above-mentioned high temperature extraction heat thing, generally only be used for hydrotreating produced fluid fuel.In recent years, document (Journal of Fuel Chemistry and Technology is arranged, 2011,39:401) report: utilize toluene and low-carbon alcohol mixed solvent to the brown coal thermosol extraction of pressurizeing under the pyrolysis of coal temperature condition being lower than, not only can effectively control coal-based body structure pyrolysis, and can utilize methyl alcohol fracture Hydrogen Bonds In Coal Through effect and part to contain the oxygen covalent bond structure, and percentage extraction is high, and gained thermosol thing is mainly fatty compounds and a small amount of phenol etc.
Utilization of the present invention is lower than brown coal toluene and methanol mixed extractant thermosol extract under the pyrolysis temperature condition, successfully separates successively obtaining senior fatty compounds through Methanol Recovery, alkali cleaning dephenolize and toluene recovery.The method technical process is short, percentage extraction is high, easy to operate, green non-pollution, solvent is recyclable to be recycled, the senior fatty compounds of gained is comprised of senior aliphatic hydrocarbon and higher fatty acid methyl esters, can be directly used in the fine chemicals such as montanin wax or further separate senior aliphatic hydrocarbon and the higher fatty acid methyl esters, added value is high.
Summary of the invention
The present invention is directed to the problem that prior art exists, purpose provides a kind of method of extracting senior fatty compounds from brown coal, and the senior fatty compounds of gained is by C
16 ~ 30Senior aliphatic hydrocarbon and C
16 ~ 26The higher fatty acid methyl esters forms, can be directly as fine chemicals such as montanin waxes, and also further separation and Extraction higher fatty acid methyl esters and senior aliphatic hydrocarbon.
A kind of method concrete steps of extracting senior fatty compounds from brown coal provided by the present invention are as follows:
(1) particle diameter being not more than 100 purpose drying brown coals adds in the potheater, pass into air in the nitrogen replacement still, then by brown coal: the mixed extractant mass ratio is 1: (2 ~ 5), adding the toluene and methanol mixed extractant, the volume ratio of toluene and methyl alcohol is 3: 1 in the described mixed extractant.After potheater sealing poured nitrogen to potheater pressure and be 0.1 ~ 5 MPa, open and stir, extract 30 ~ 120 min after being warming up to 150 ~ 300 ℃;
(2) open the bottom discharge valve of the described potheater of step (1), separate residual coal and extraction heat thing solution through the heat filter of 0.5 μ m metallic membrane;
(3) the extraction heat thing solution that step (2) is obtained adds in the still kettle, adds thermal distillation and collects cut below 65 ℃, removes wherein all methyl alcohol and a small amount of toluene;
(4) the extraction heat thing solution that removes behind whole methyl alcohol and a small amount of toluene that step (3) is obtained adds in the alkali cleaning still, under 20 ~ 50 ℃, utilize the sig water of 2 ~ 5 times of brown coal quality, divide and carry out alkali cleaning three times, standing separation is removed the extraction heat thing solution after the phenates aqueous solution obtains alkali cleaning;
(5) the extraction heat thing solution heating after the alkali cleaning that step (4) is obtained is steamed and is taken off the residual toluene solvent, obtains the senior fatty compounds of product.
Step (3) and step (5) reclaim solvent and recycle by analysis with after forming adjustment.
The used sig water of step (4) is NaOH, KOH, Na
2CO
3And K
2CO
3In the aqueous solution of any one or any two kinds of compositions, the alkali lye mass concentration is 1 ~ 10%.
The senior fatty compounds of described product is the mixture that senior straight chain aliphatic hydrocarbon and higher fatty acid methyl esters form.
Adopt the methanol/toluene mixed extractant that brown coal are carried out the pressurized heat extraction, wherein methanol solvate not only can destroy hydrogen bond action in the brown coal, and can by covalent linkage such as ester bonds in esterification and the transesterification reaction fracture brown coal, significantly improve the brown coal percentage extraction; Toluene solvant then helps solvent to infiltration, swelling and the dissolving of senior fatty compounds of brown coal; Regulate methyl alcohol and toluene ratio of components, can change the mixed solvent dissolving power, adapt to different brown coal extraction heats.Simultaneously, utilize lower boiling toluene and methanol solvate to be conducive to the subsequent product Separation ﹠ Purification.
Described step (1) is extraction heat in 150 ~ 300 ℃ of scopes, not only can be by adding non covalent bond in the heat collapse brown coal, promote brown coal small molecular compound dissolution, improve percentage extraction, and the brown coal macromolecular network structure cracking that can avoid being rich in aromatic structure, promote the fatty compounds selective extraction.In addition, extraction heat also is conducive to carboxyl and ester group generation esterification and transesterification reaction in methyl alcohol and the brown coal under the described temperature.
Described step (2) adopt heat filtering to separate can to avoid in the process of cooling extraction heat thing Precipitation and minute between associate, improve separation efficiency and the percentage extraction of extraction heat thing and residual coal.Simultaneously, heat filtering separates the pressure raising filtration velocity that can utilize in the potheater.
Described step (3) is utilized the azeotropic characteristics of methyl alcohol and toluene Mixed Solvent, and distillation removes whole methyl alcohol and part toluene under the azeotropic point temperature.Because methanol content is 72.4 % in methyl alcohol and the methylbenzene azeotropic thing, azeotropic point is 63.7 ℃, so can remove whole methyl alcohol and a small amount of toluene solvant under 65 ℃.Simultaneously, methanol removal not only can improve the Methanol Recovery rate before the alkali cleaning dephenolize, and a large amount of toluene solvants is conducive to the alkali cleaning operation.
Described step (4) is utilized the extraction heat thing behind the dilute alkaline aqueous solution washing methanol removal, removes phenolic compound in the extraction heat thing by generating water miscible phenates, and also neutralization removes a small amount of carboxylic acid compound simultaneously.Used alkali lye is NaOH, KOH, Na
2CO
3And K
2CO
3In the strong alkali aqueous solution of any one or two kinds of compositions, mass concentration is 1 ~ 10%, the alkali lye consumption is 2 ~ 5 times of brown coal quality.Because dilution and the extraction of residual toluene behind the methanol removal are conducive to alkali cleaning dephenolize operation, avoid emulsion.Simultaneously, 20 ~ 50 ℃ of alkali cleanings can improve alkali cleaning effect, are conducive to be separated.
Described step (5) removes the residual toluene solvent by heating, and removes a small amount of water that wherein exists by forming azeotrope, avoids follow-up drying treatment.The toluene solvant that reclaims can recycle.
The invention provides and a kind ofly extract the method for senior fatty cpd by brown coal highly selective, high yield, the inventive method technical process is short, easy to operate, the solvent reusable edible.
Embodiment
Embodiment 1:
(1) 100 g particle diameters is not more than 100 purpose drying brown coals and adds in the potheater, pass into air in the nitrogen replacement still.Then, by brown coal: the mixed extractant mass ratio is 1: 2, adds 200 mL toluene and methanol mixed extractants, and the volume ratio of toluene and methyl alcohol is 3: 1 in the described mixed extractant.With after the potheater sealing, pour nitrogen to 0.1 MPa, open and stir, be warming up to 300 ℃ after extraction 30 min;
(2) open the bottom discharge valve of the described potheater of step (1), separate residual coal and extraction heat thing solution through the heat filter of 0.5 μ m metallic membrane;
(3) the extraction heat thing solution that step (2) is obtained adds in the still kettle, adds thermal distillation and collects cut below 65 ℃, removes wherein all methyl alcohol and a small amount of toluene;
(4) methanol removal that step (3) is obtained and the extraction heat thing solution behind a small amount of toluene add in the alkali cleaning still, under 20 ℃, utilize 200 mL, 1 % NaOH solution to divide three alkali cleanings, standing separation is removed the phenates aqueous solution, obtains the extraction heat thing solution after the alkali cleaning;
(5) the extraction heat thing solution heating after the alkali cleaning that step (4) is obtained is steamed and is taken off the residual toluene solvent, obtains senior fatty cpd product, mass yield 14.6 %.
Step (3) and step (5) reclaim solvent and recycle by analysis with after forming adjustment.
The quality of the senior fatty cpd product of gained forms: senior aliphatic hydrocarbon 62.1 %, higher fatty acid methyl esters are 32.6 %.Wherein, senior straight chain aliphatic hydrocarbon comprises 56.9 % C
17 ~ 30Normal paraffin and 5.2 % C
16 ~ 25Isoparaffin and monoolefine; The higher fatty acid methyl esters comprises 30.1 %C
16-26Linear saturated fatty acids methyl esters and 2.5 % C
18Hydroxyl substituted fatty acid methyl esters and unsaturated fatty acids methyl esters.
Embodiment 2:
(1) 100 g particle diameters is not more than 100 purpose drying brown coals and adds in the potheater, pass into air in the nitrogen replacement still.Then, by brown coal: the mixed extractant mass ratio is 1: 3, adds 300 mL toluene and methanol mixed extractants, and the volume ratio of toluene and methyl alcohol is 3: 1 in the described mixed extractant.With after the potheater sealing, pour nitrogen to 0.1 MPa, open and stir, be warming up to 300 ℃ after extraction 60 min;
(2) open the bottom discharge valve of the described potheater of step (1), separate residual coal and extraction heat thing solution through the heat filter of 0.5 μ m metallic membrane;
(3) the extraction heat thing solution that step (2) is obtained adds in the still kettle, adds thermal distillation and collects cut below 65 ℃, removes wherein all methyl alcohol and a small amount of toluene;
(4) methanol removal that step (3) is obtained and the extraction heat thing solution behind a small amount of toluene add in the alkali cleaning still, under 30 ℃, utilize 300 mL, 5 % NaOH solution to divide three alkali cleanings, standing separation is removed the phenates aqueous solution, obtains the extraction heat thing solution after the alkali cleaning;
(5) the extraction heat thing solution heating after the alkali cleaning that step (4) is obtained is steamed and is taken off the residual toluene solvent, obtains senior fatty cpd product, mass yield 15.9 %.Step (3) and step (5) reclaim solvent and recycle by analysis with after forming adjustment.
Embodiment 3:
(1) 100 g particle diameters is not more than 100 purpose drying brown coals and adds in the potheater, pass into air in the nitrogen replacement still.Then, by brown coal: the mixed extractant mass ratio is 1: 5, adds 500 mL toluene and methanol mixed extractants, and the volume ratio of toluene and methyl alcohol is 3: 1 in the described mixed extractant.With after the potheater sealing, pour nitrogen to 0.1 MPa, open and stir, be warming up to 300 ℃ after extraction 90 min;
(2) open the bottom discharge valve of the described potheater of step (1), separate residual coal and extraction heat thing solution through the heat filter of 0.5 μ m metallic membrane;
(3) the extraction heat thing solution that step (2) is obtained adds in the still kettle, adds thermal distillation and collects cut below 65 ℃, removes wherein all methyl alcohol and a small amount of toluene;
(4) methanol removal that step (3) is obtained and the extraction heat thing solution behind a small amount of toluene add in the alkali cleaning still, under 40 ℃, utilize 500 mL, 4 % KOH solution to divide three alkali cleanings, standing separation is removed the phenates aqueous solution, obtains the extraction heat thing solution after the alkali cleaning;
(5) the extraction heat thing solution heating after the alkali cleaning that step (4) is obtained is steamed and is taken off the residual toluene solvent, obtains senior fatty cpd product, mass yield 17.8 %.Step (3) and step (5) reclaim solvent and recycle by analysis with after forming adjustment.
Embodiment 4:
(1) 100 g particle diameters is not more than 100 purpose drying brown coals and adds in the potheater, pass into air in the nitrogen replacement still.Then, by brown coal: the mixed extractant mass ratio is 1: 5, adds 500 mL toluene and methanol mixed extractants, and the volume ratio of toluene and methyl alcohol is 3: 1 in the described mixed extractant.With after the potheater sealing, pour nitrogen to 5 MPa, open and stir, be warming up to 150 ℃ after extraction 120 min;
(2) open the bottom discharge valve of the described potheater of step (1), separate residual coal and extraction heat thing solution through the heat filter of 0.5 μ m metallic membrane;
(3) the extraction heat thing solution that step (2) is obtained adds in the still kettle, adds thermal distillation and collects cut below 65 ℃, removes wherein all methyl alcohol and a small amount of toluene;
(4) methanol removal that step (3) is obtained and the extraction heat thing solution behind a small amount of toluene add in the alkali cleaning still, utilize 200 mL, 8 % Na under 50 ℃
2CO
3Solution divides three alkali cleanings, and standing separation is removed the phenates aqueous solution, obtains the extraction heat thing solution after the alkali cleaning;
(5) the extraction heat thing solution heating after the alkali cleaning that step (4) is obtained is steamed and is taken off the residual toluene solvent, obtains senior fatty cpd product, mass yield 14.1 %.Step (3) and step (5) reclaim solvent and recycle by analysis with after forming adjustment.
Embodiment 5:
(1) 100 g particle diameters is not more than 100 purpose drying brown coals and adds in the potheater, pass into air in the nitrogen replacement still.Then, by brown coal: the mixed extractant mass ratio is 1: 3, adds 300 mL toluene and methanol mixed extractants, and the volume ratio of toluene and methyl alcohol is 3: 1 in the described mixed extractant.With after the potheater sealing, pour nitrogen to 0.5 MPa, open and stir, be warming up to 250 ℃ after extraction 60 min;
(2) open the bottom discharge valve of the described potheater of step (1), separate residual coal and extraction heat thing solution through the heat filter of 0.5 μ m metallic membrane;
(3) the extraction heat thing solution that step (2) is obtained adds in the still kettle, adds thermal distillation and collects cut below 65 ℃, removes wherein all methyl alcohol and a small amount of toluene;
(4) methanol removal that step (3) is obtained and the extraction heat thing solution behind a small amount of toluene add in the alkali cleaning still, utilize 200 mL, 4 % Na under 20 ℃
2CO
3Solution divides three alkali cleanings, and standing separation is removed the phenates aqueous solution, obtains the extraction heat thing solution after the alkali cleaning;
(5) the extraction heat thing solution heating after the alkali cleaning that step (4) is obtained is steamed and is taken off the residual toluene solvent, obtains senior fatty cpd product, mass yield 15.8 %.Step (3) and step (5) reclaim solvent and recycle by analysis with after forming adjustment.
Embodiment 6:
(1) 100 g particle diameters is not more than 100 purpose drying brown coals and adds in the potheater, pass into air in the nitrogen replacement still.Then, by brown coal: the mixed extractant mass ratio is 1: 2, adds 200 mL toluene and methanol mixed extractants, and the volume ratio of toluene and methyl alcohol is 3: 1 in the described mixed extractant.With after the potheater sealing, pour nitrogen to 1 MPa, open and stir, be warming up to 200 ℃ after extraction 60 min;
(2) open the bottom discharge valve of the described potheater of step (1), separate residual coal and extraction heat thing solution through the heat filter of 0.5 μ m metallic membrane;
(3) the extraction heat thing solution that step (2) is obtained adds in the still kettle, adds thermal distillation and collects cut below 65 ℃, removes wherein all methyl alcohol and a small amount of toluene;
(4) methanol removal that step (3) is obtained and the extraction heat thing solution behind a small amount of toluene add in the alkali cleaning still, utilize 300 mL, 10 % K under 20 ℃
2CO
3Solution divides three alkali cleanings, and standing separation is removed the phenates aqueous solution, obtains the extraction heat thing solution after the alkali cleaning;
(5) the extraction heat thing solution heating after the alkali cleaning that step (4) is obtained is steamed and is taken off the residual toluene solvent, obtains senior fatty cpd product, mass yield 15.7 %.Step (3) and step (5) reclaim solvent and recycle by analysis with after forming adjustment.
Claims (3)
1. method of extracting senior fatty compounds from brown coal is characterized in that described method concrete steps are as follows:
(1) particle diameter being not more than 100 purpose drying brown coals adds in the potheater, pass into air in the nitrogen replacement still, then by brown coal: the mixed extractant mass ratio is 1: (2 ~ 5), add the toluene and methanol mixed extractant, the volume ratio of toluene and methyl alcohol is 3: 1 in the described mixed extractant, after potheater sealing poured nitrogen to potheater pressure and be 0.1 ~ 5 MPa, open and stir, extract 30 ~ 120 min after being warming up to 150 ~ 300 ℃;
(2) open the bottom discharge valve of the described potheater of step (1), separate residual coal and extraction heat thing solution through the heat filter of 0.5 μ m metallic membrane;
(3) the extraction heat thing solution that described step (2) is obtained adds in the still kettle, adds thermal distillation and collects cut below 65 ℃, removes wherein all methyl alcohol and a small amount of toluene;
(4) the extraction heat thing solution that removes behind whole methyl alcohol and a small amount of toluene that step (3) is obtained adds in the alkali cleaning still, under 20 ~ 50 ℃, utilize the sig water of 2 ~ 5 times of brown coal quality, divide and carry out alkali cleaning three times, standing separation is removed the extraction heat thing solution after the phenates aqueous solution obtains alkali cleaning;
(5) the extraction heat thing solution heating after the alkali cleaning that step (4) is obtained is steamed and is taken off the residual toluene solvent, obtains the senior fatty compounds of product.
2. method according to claim 1 is characterized in that the sig water in the described step (3) is NaOH, KOH, Na
2CO
3And K
2CO
3In the aqueous solution of any one or any two kinds of compositions, described sig water mass concentration is 1 ~ 10 %.
3. method according to claim 1 is characterized in that the senior fatty compounds of product in the step (5) is the mixture that senior straight chain aliphatic hydrocarbon and higher fatty acid methyl esters form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104154457A CN102936510A (en) | 2012-10-26 | 2012-10-26 | Method for extracting higher aliphatic compound from lignite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104154457A CN102936510A (en) | 2012-10-26 | 2012-10-26 | Method for extracting higher aliphatic compound from lignite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102936510A true CN102936510A (en) | 2013-02-20 |
Family
ID=47695434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104154457A Pending CN102936510A (en) | 2012-10-26 | 2012-10-26 | Method for extracting higher aliphatic compound from lignite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102936510A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194250A (en) * | 2013-04-28 | 2013-07-10 | 安徽工业大学 | High-sulfur fertilizer coal modification method and application thereof in coking coal blending |
| CN103589444A (en) * | 2013-11-19 | 2014-02-19 | 安徽工业大学 | Methanol mixed solvent pretreatment method for direct coal hydro-liquefaction |
| CN103881753A (en) * | 2014-04-12 | 2014-06-25 | 曲靖众一精细化工股份有限公司 | Emulsion type wax refined by esterifying lignite wax and preparation method of emulsion type wax |
| CN103881751A (en) * | 2014-04-12 | 2014-06-25 | 曲靖众一精细化工股份有限公司 | Solvent-type wax saponified and refined from lignite wax and preparation method of solvent-type wax |
| CN110833704A (en) * | 2019-11-20 | 2020-02-25 | 安徽工业大学 | Method for improving solvent extraction yield of low-rank coal by using freezing pretreatment |
| CN114229821A (en) * | 2021-07-28 | 2022-03-25 | 山东科技大学 | Method for preparing porous carbon material from low-rank coal thermally-dissolved organic matter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388171A (en) * | 1981-10-30 | 1983-06-14 | Beggs James M Administrator Of | Supercritical multicomponent solvent coal extraction |
| CN102512846A (en) * | 2011-11-22 | 2012-06-27 | 河北钢铁集团有限公司 | Method for thermally extracting coal |
-
2012
- 2012-10-26 CN CN2012104154457A patent/CN102936510A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388171A (en) * | 1981-10-30 | 1983-06-14 | Beggs James M Administrator Of | Supercritical multicomponent solvent coal extraction |
| CN102512846A (en) * | 2011-11-22 | 2012-06-27 | 河北钢铁集团有限公司 | Method for thermally extracting coal |
Non-Patent Citations (2)
| Title |
|---|
| WANG ZHI-CAI等: "High temperature thermal extraction of xianfeng lignite", 《JOURNAL OF FUEL CHEMISTRY AND TECHNOLOGY》 * |
| 王知彩等: "先锋褐煤热溶及热溶物红外光谱表征", 《燃料化学学报》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194250A (en) * | 2013-04-28 | 2013-07-10 | 安徽工业大学 | High-sulfur fertilizer coal modification method and application thereof in coking coal blending |
| CN103194250B (en) * | 2013-04-28 | 2014-08-13 | 安徽工业大学 | High-sulfur fertilizer coal modification method and application thereof in coking coal blending |
| CN103589444A (en) * | 2013-11-19 | 2014-02-19 | 安徽工业大学 | Methanol mixed solvent pretreatment method for direct coal hydro-liquefaction |
| CN103589444B (en) * | 2013-11-19 | 2015-04-22 | 安徽工业大学 | Methanol mixed solvent pretreatment method for direct coal hydro-liquefaction |
| CN103881753A (en) * | 2014-04-12 | 2014-06-25 | 曲靖众一精细化工股份有限公司 | Emulsion type wax refined by esterifying lignite wax and preparation method of emulsion type wax |
| CN103881751A (en) * | 2014-04-12 | 2014-06-25 | 曲靖众一精细化工股份有限公司 | Solvent-type wax saponified and refined from lignite wax and preparation method of solvent-type wax |
| CN103881751B (en) * | 2014-04-12 | 2015-10-07 | 曲靖众一精细化工股份有限公司 | Solvent-borne type wax that a kind of montanin wax saponification is refining and preparation method thereof |
| CN103881753B (en) * | 2014-04-12 | 2015-11-25 | 曲靖众一精细化工股份有限公司 | Oil-in-water type wax that a kind of montanin wax esterification is refining and preparation method thereof |
| CN110833704A (en) * | 2019-11-20 | 2020-02-25 | 安徽工业大学 | Method for improving solvent extraction yield of low-rank coal by using freezing pretreatment |
| CN114229821A (en) * | 2021-07-28 | 2022-03-25 | 山东科技大学 | Method for preparing porous carbon material from low-rank coal thermally-dissolved organic matter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mathanker et al. | Hydrothermal liquefaction of lignocellulosic biomass feedstock to produce biofuels: Parametric study and products characterization | |
| CN102936510A (en) | Method for extracting higher aliphatic compound from lignite | |
| CN101967396B (en) | Method for extracting montan wax | |
| Asl et al. | Eco-friendly synthesis of biodiesel from WCO by using electrolysis technique with graphite electrodes | |
| CN102827675B (en) | Method for preparing environment-friendly insulating oil by taking plant oil or recovered oil as raw materials | |
| CN105368574B (en) | Method for reducing acid value of liquid organic mixture | |
| CN102179239B (en) | Method for recycling carclazyte used for refining petroleum | |
| CN105018124B (en) | A kind of coal tar waste residue extraction separating method | |
| CN101195572A (en) | Method for synthesizing fatty acid methyl ester | |
| CN100537592C (en) | Method of coproducting phytosterol, biological diesel oil and vitamin E | |
| CN103275754B (en) | Method for separating liquefied heavy oil and asphalt substrate from direct coal liquefaction residues | |
| CN102512846A (en) | Method for thermally extracting coal | |
| CN104140885B (en) | Method for preparing fatty acid ester with oxidation resistance by using oil-containing plant seeds as raw materials | |
| CN103740461B (en) | A kind of method of refining for bio oil multi-stage separation | |
| CN102282245B (en) | Method for obtaining a fraction enriched with functionalised fatty acid esters from seeds of oleaginous plants | |
| CN114272932B (en) | Nickel-cerium biochar catalyst and preparation method and application thereof | |
| CN101619232A (en) | Method for removing organic acid in biodiesel | |
| CN109825322B (en) | Method for extracting phenolic substances from coal tar or direct coal liquefaction oil | |
| US11891576B2 (en) | Processes for obtaining substances from bark and a composition containing bark for use in the processes | |
| CN101974345A (en) | Method for processing low-temperature pyrolyzed coal tar | |
| CN103666769B (en) | Method for extracting fatty acid methyl ester from vegetable pitch | |
| CN103773416A (en) | Method for preparing biodiesel by utilizing rapeseeds | |
| CN101787301B (en) | Processing method of lignite | |
| Hu et al. | Research on the influence of sequential isopropanolysis liquefaction on the composition of liquid tars and physicochemical structure evolution of renbei lignite | |
| Liu et al. | Enhanced liquid tar production as fuels/chemicals from Powder River Basin coal through CaO catalyzed stepwise degradation in eco-friendly supercritical CO2/ethanol |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130220 |