CN102397777A - Preparation method of activated rice husk ash and application of activated rice husk ash to purification of biodiesel - Google Patents
Preparation method of activated rice husk ash and application of activated rice husk ash to purification of biodiesel Download PDFInfo
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- CN102397777A CN102397777A CN2011103045388A CN201110304538A CN102397777A CN 102397777 A CN102397777 A CN 102397777A CN 2011103045388 A CN2011103045388 A CN 2011103045388A CN 201110304538 A CN201110304538 A CN 201110304538A CN 102397777 A CN102397777 A CN 102397777A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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Abstract
The invention discloses a preparation method of activated rice husk ash. The method comprises the following steps: 1) hydrochloric acid immersion: immersing the rice husk ash with 3mol/L hydrochloric acid for 2-6 h; 2) washing and draining: washing to neutral and draining; 3) high temperature treatment: sintering at 500-600 DEG C for 2-8 h to obtain the activated rice husk ash. The method of the invention is simple, and prepared activated rice husk ash has large specific surface area, strong adsorption capability and low cost. The invention also discloses application of the prepared activated rice husk ash to purification of biodiesel. Applied to purification of biodiesel, the activated rice husk ash has advantages of simple equipment, easy operation, zero washing, waste water discharge reduction and environmental pollution reduction.
Description
Technical field
The invention belongs to technical field of biochemical industry, be specifically related to a kind of preparation method and application in purifying biological diesel oil thereof of activation rice hull ash.
Background technology
At present, be raw material often with vegetable oil, animal tallow, adopt homogeneous phase base-catalyzed transesterification prepared in reaction biodiesel.This method has short, productive rate advantage of higher of reaction condition gentleness, production time.But the homogeneous phase base catalysis prepares biodiesel and also has some problems.Such as, in ester-exchange reaction, produced soap; Especially when using the higher raw material of free fatty acid content, also produced the by-product glycerin of ester exchange simultaneously.And the residual biodiesel that soap and dissociative glycerin are arranged can have a strong impact on the operate as normal of diesel engine, even shorten its working life greatly when burning.Therefore, the quality standard strictness that biodiesel is relevant has limited the residual quantity of soap and dissociative glycerin.
Be the requirement that biodiesel is reached quality standards, need carry out purification process biodiesel.Publication number is that the one Chinese patent application of CN101735845A discloses with thin film evaporator the thick product of biodiesel is outgased and distillation procedure, obtains coarse biodiesel; The coarse biodiesel product that again separation is obtained carries out the alkaline earth depickling, obtains the purifying biological diesel oil of acid number National standard.Its used alkaline earth deacidification agent is by alkaline Peng Run soil or zeolite powder and a certain amount of Na
2CO3, NaHCO3, Na
2The saturated solution of SO4, NaOH, KOH etc. mixes under heat-retaining condition and gets.Publication number is that the one Chinese patent application of CN101475824 has been described and a kind ofly prepared method of bio-diesel oil to the higher feedstock oil of acid number.Free fatty in this method elder generation separate raw materials oil carries out acid esters reaction and ester exchange reaction to aliphatic acid and triglycerides after separating respectively then, makes coarse biodiesel.With the method for adsorption filtration coarse biodiesel is made with extra care again.It is sorbent used to be the atlapulgite of 2%-7%.Publication number is that the one Chinese patent application of CN101939068A has been described the method for using the adsorbent purifying biological diesel oil of powder, powder shape or extruding.Used adsorbent comprises the bleaching clay of charcoal, silica, zeolite, metal silicate, bleaching clay or activation.In addition, this method is to use the adsorption column system to come purifying biological diesel oil.The patent No. is that 4629588 United States Patent (USP) has been described the various forms of adsorbents of use silica, like the film of silica gel, precipitated silica, silica, the purified monoglycerides such as silica of calcining, to remove phosphatide in the glyceride, metal ion etc.Though these methods all have effect preferably to purifying biological diesel oil, or purification step is complicated, and the adsorbent cost that perhaps uses is higher.
Publication number is that the one Chinese patent application of CN101457176 has been described and used rice hull ash the feedstock oil as production of biodiesel to be carried out the method for purifying.The object of its purifying is mainly free fatty, phosphatide, carrotene, sterol, protein, amino acid and vitamin, does not mention the purifying to dissociative glycerin.And employed rice hull ash is not activated, and specific area is less, and adsorption capacity is limited.
Summary of the invention
Technical problem to be solved by this invention provides a kind of preparation method of activation rice hull ash simple and convenient, with low cost.The activation rice hull ash specific area of preparation is big, high adsorption capacity.
Another technical problem to be solved by this invention provides the application process of a kind of activation rice hull ash in purifying biological diesel oil.
For solving first technical problem of the present invention, the technical scheme that the present invention adopts comprises the steps:
1) salt soak: earlier with the salt soak 2-6h of rice hull ash with 3mol/L;
2) washing drains: washing is to neutral and drain then;
3) high-temperature process: after firing 2-8h under the 500-600 ℃ of temperature, promptly get the activation rice hull ash again.
For solving second technical problem of the present invention, the technical scheme that the present invention adopts comprises following technical step:
1) absorption: the activation rice hull ash is added in the biodiesel absorption soap and dissociative glycerin wherein;
2) separate: the activation rice hull ash that will be adsorbed with soap and dissociative glycerin is separated with biodiesel, gets purifying biological diesel oil.
For solving second technical problem of the present invention, also can adopt following technical scheme:
1) composite: one or more of activation rice hull ash and silica gel, active carbon, atlapulgite, aluminium oxide, diatomite, white carbon are composite, and the content that makes the activation rice hull ash is more than 50%, composite activation rice hull ash;
2) absorption: composite activation rice hull ash is added in the biodiesel absorption soap and dissociative glycerin wherein;
3) separate: the composite activation rice hull ash that will be adsorbed with soap and dissociative glycerin is separated with biodiesel, gets purifying biological diesel oil.
Further, in the said adsorption step, material temperature is 30-120 ℃, and mixing speed is 100-3000r/min, and adsorption time is 5-120min, and the adsorbent addition is the 1%-5% of biodiesel weight.
Further, said separating step adopts centrifugal or isolated by filtration mode.
Beneficial effect of the present invention is:
1) rice husk is the accessory substance of rice processing, and rice hull ash is the waste material after rice husk is used for burning boiler, is feedstock production activation rice hull ash with the rice hull ash, and raw material sources are extensive, and are with low cost.Activated process the activation rice hull ash after, the unburned further carbonization of organic matter completely in the rice hull ash, specific area also significantly improves, adsorption capacity is enhanced.
2) the rice hull ash activation is prepared the purifying that is used for biodiesel after the activation rice hull ash, not only solved a waste disposal difficult problem, and can be that enterprise creates considerable economic value with society.
3) adopt simple, the processing ease of purification via adsorption-based process biodiesel equipment; Need not washing, reduced discharge of wastewater and environmental pollution.
The specific embodiment
The following stated embodiment has at length explained the present invention.
Embodiment 1
Take by weighing the 500g rapeseed oil in beaker, put into the heat collecting type magnetic stirring apparatus and be preheated to 50 ℃.By molar ratio of methanol to oil is to measure absolute methanol at 6: 1, adds oil and weighs 1% NaOH, fully stirs, and NaOH is dissolved fully.The methanol solution that will be dissolved with NaOH then slowly adds in the oil reaction 1h under stirring condition.Reaction changes the mixed solution in the beaker over to separatory funnel and leaves standstill after accomplishing.Treat that methyl esters layer in the separatory funnel with after glycerin layer is separated fully, isolates the methyl esters layer, promptly obtain rough biodiesel (soap content is 2928ppm, and free glycerol content is 0.29%).
Rice hull ash elder generation is with the salt soak 2h of 3mol/L; Washing is to neutral and drain then; After firing 6h under 550 ℃ of temperature, obtain the activation rice hull ash.Before the activation with activation after the specific area of rice hull ash be respectively 115m
2/ g and 278m
2/ g.
Take by weighing the rough biodiesel of 50g and place beaker, put into constant temperature blender with magnetic force and be preheated to 40 ℃, add oil again and weigh 2% activation rice hull ash; Mixing speed is to adsorb 20min under the condition of 3000r/min; Filter out spent sorbents then and obtain purifying biological diesel oil (the soap residual quantity is 62ppm, and the dissociative glycerin residual quantity is 0.05%).
Embodiment 2
Take by weighing the 500g soybean oil in beaker, put into the heat collecting type magnetic stirring apparatus and be preheated to 50 ℃.By molar ratio of methanol to oil is to measure absolute ethyl alcohol at 6: 1, adds oil and weighs 1% NaOH, fully stirs, and NaOH is dissolved fully.The methanol solution that will be dissolved with NaOH then slowly adds in the oil reaction 1h under stirring condition.Reaction changes the mixed solution in the beaker over to separatory funnel and leaves standstill after accomplishing.Treat that methacrylate layer in the separatory funnel with after glycerin layer is separated fully, isolates methacrylate layer, promptly obtain rough biodiesel (soap content is 2588ppm, and free glycerol content is 0.25%).
Rice hull ash elder generation is with the salt soak 6h of 3mol/L; Washing is to neutral and drain then; After firing 6h under 600 ℃ of temperature, obtain the activation rice hull ash.Before the activation with activation after the specific area of rice hull ash be respectively 115m
2/ g and 289m
2/ g.
Take by weighing the rough biodiesel of 50g and place beaker, put into constant temperature blender with magnetic force and be preheated to 30 ℃, add oil again and weigh 1% activation rice hull ash; Mixing speed is to adsorb 40min under the condition of 2000r/min; Filter out spent sorbents then and obtain purifying biological diesel oil (the soap residual quantity is 370ppm, and the dissociative glycerin residual quantity is 0.11%).
Embodiment 3
Take by weighing the 500g rapeseed oil in beaker, put into the heat collecting type magnetic stirring apparatus and be preheated to 50 ℃.By molar ratio of methanol to oil is to measure absolute methanol at 6: 1, adds oil and weighs 1% NaOH, fully stirs, and NaOH is dissolved fully.The methanol solution that will be dissolved with NaOH then slowly adds in the oil reaction 1h under stirring condition.Reaction changes the mixed solution in the beaker over to separatory funnel and leaves standstill after accomplishing.Treat that methyl esters layer in the separatory funnel with after glycerin layer is separated fully, isolates the methyl esters layer, promptly obtain rough biodiesel (soap content is 2928ppm, and free glycerol content is 0.29%).
Rice hull ash elder generation is with the salt soak 4h of 3mol/L; Washing is to neutral and drain then; After firing 3h under 500 ℃ of temperature, obtain the activation rice hull ash.Before the activation with activation after the specific area of rice hull ash be respectively 115m
2/ g and 263m
2/ g.Activation rice hull ash and atlapulgite is composite, get composite activation rice hull ash, the weight of wherein activation rice hull ash accounts for 60% of composite activation rice hull ash gross weight.
Take by weighing the rough biodiesel of 50g and place beaker, put into constant temperature blender with magnetic force and be preheated to 80 ℃, add oil again and weigh 5% composite activation rice hull ash; Mixing speed is to adsorb 100min under the condition of 1000r/min; Filter out spent sorbents then and obtain purifying biological diesel oil (soap residual quantity and dissociative glycerin residual quantity all do not detect).
Embodiment 4
Take by weighing 500g lard in beaker, put into the heat collecting type magnetic stirring apparatus and be preheated to 50 ℃.By molar ratio of methanol to oil is to measure absolute methanol at 6: 1, adds oil and weighs 1% NaOH, fully stirs, and NaOH is dissolved fully.The methanol solution that will be dissolved with NaOH then slowly adds in the oil reaction 1h under stirring condition.Reaction changes the mixed solution in the beaker over to separatory funnel and leaves standstill after accomplishing.Treat that methyl esters layer in the separatory funnel with after glycerin layer is separated fully, isolates the methyl esters layer, promptly obtain rough biodiesel (soap content is 2163ppm, and free glycerol content is 0.26%).
Rice hull ash elder generation is with the salt soak 2h of 3mol/L; Washing is to neutral and drain then; After firing 6h under 550 ℃ of temperature, obtain the activation rice hull ash.Before the activation with activation after the specific area of rice hull ash be respectively 115m
2/ g and 278m
2/ g.
Take by weighing the rough biodiesel of 50g and place beaker, put into constant temperature blender with magnetic force and be preheated to 120 ℃, add oil again and weigh 2% activation rice hull ash; Mixing speed is to adsorb 120min under the condition of 300r/min; Filter out spent sorbents then and obtain purifying biological diesel oil (the soap residual quantity is 187ppm, and the dissociative glycerin residual quantity is 0.07%).
Embodiment 5
Take by weighing the 500g cottonseed oil in beaker, put into the heat collecting type magnetic stirring apparatus and be preheated to 50 ℃.By molar ratio of methanol to oil is to measure absolute methanol at 6: 1, adds oil and weighs 1% NaOH, fully stirs, and NaOH is dissolved fully.The methanol solution that will be dissolved with NaOH then slowly adds in the oil reaction 1h under stirring condition.Reaction changes the mixed solution in the beaker over to separatory funnel and leaves standstill after accomplishing.Treat that methyl esters layer in the separatory funnel with after glycerin layer is separated fully, isolates the methyl esters layer, promptly obtain rough biodiesel (soap content is 3165ppm, and free glycerol content is 0.31%).
Rice hull ash elder generation is with the salt soak 5h of 3mol/L; Washing is to neutral and drain then; After firing 2h under 600 ℃ of temperature, obtain the activation rice hull ash.Before the activation with activation after the specific area of rice hull ash be respectively 115m
2/ g and 291m
2/ g.
Take by weighing the rough biodiesel of 50g and place beaker, put into constant temperature blender with magnetic force and be preheated to 100 ℃, add oil again and weigh 1% activation rice hull ash; Mixing speed is to adsorb 60min under the condition of 1000r/min; Filter out spent sorbents then and obtain purifying biological diesel oil (the soap residual quantity is 493ppm, and the dissociative glycerin residual quantity is 0.12%).
Embodiment 6
Take by weighing the 500g soybean oil in beaker, put into the heat collecting type magnetic stirring apparatus and be preheated to 50 ℃.By molar ratio of methanol to oil is to measure absolute methanol at 6: 1, adds oil and weighs 1% NaOH, fully stirs, and NaOH is dissolved fully.The methanol solution that will be dissolved with NaOH then slowly adds in the oil reaction 1h under stirring condition.Reaction changes the mixed solution in the beaker over to separatory funnel and leaves standstill after accomplishing.Treat that methyl esters layer in the separatory funnel with after glycerin layer is separated fully, isolates the methyl esters layer, promptly obtain rough biodiesel (soap content is 2588ppm, and free glycerol content is 0.25%).
Rice hull ash elder generation is with the salt soak 3h of 3mol/L; Washing is to neutral and drain then; After firing 4h under 500 ℃ of temperature, obtain the activation rice hull ash.Before the activation with activation after the specific area of rice hull ash be respectively 115m
2/ g and 272m
2/ g.Activation rice hull ash and white carbon and atlapulgite is composite; Get composite activation rice hull ash; Wherein activation rice hull ash weight accounts for 50% of composite activation rice hull ash gross weight; White carbon weight accounts for 20% of composite activation rice hull ash gross weight, and atlapulgite weight accounts for 30% of composite activation rice hull ash gross weight.
Take by weighing the rough biodiesel of 50g and place beaker, put into constant temperature blender with magnetic force and be preheated to 30 ℃, add oil again and weigh 3% composite activation rice hull ash; Mixing speed is to adsorb 120min under the condition of 100r/min; Filter out spent sorbents then and obtain purifying biological diesel oil (the soap residual quantity is 15ppm, and the dissociative glycerin residual quantity is 0.02%).
Embodiment 7
Take by weighing the 500g soybean oil in beaker, put into the heat collecting type magnetic stirring apparatus and be preheated to 50 ℃.By molar ratio of methanol to oil is to measure absolute methanol at 6: 1, adds oil and weighs 1% NaOH, fully stirs, and NaOH is dissolved fully.The methanol solution that will be dissolved with NaOH then slowly adds in the oil reaction 1h under stirring condition.Reaction changes the mixed solution in the beaker over to separatory funnel and leaves standstill after accomplishing.Treat that methyl esters layer in the separatory funnel with after glycerin layer is separated fully, isolates the methyl esters layer, promptly obtain rough biodiesel (soap content is 2588ppm, and free glycerol content is 0.25%).
Rice hull ash elder generation is with the salt soak 6h of 3mol/L; Washing is to neutral then; After firing 8h under 600 ℃ of temperature, obtain the activation rice hull ash.Before the activation with activation after the specific area of rice hull ash be respectively 115m
2/ g and 296m
2/ g.Activation rice hull ash and white carbon and atlapulgite is composite; Get composite activation rice hull ash; Wherein activation rice hull ash weight accounts for 70% of composite activation rice hull ash gross weight; White carbon weight accounts for 20% of composite activation rice hull ash gross weight, and atlapulgite weight accounts for 10% of composite activation rice hull ash gross weight.
Take by weighing the rough biodiesel of 50g and place beaker, put into constant temperature blender with magnetic force and be preheated to 50 ℃, add oil again and weigh 5% composite activation rice hull ash; Mixing speed is to adsorb 60min under the condition of 1500r/min; Filter out spent sorbents then and obtain purifying biological diesel oil (soap residual quantity and dissociative glycerin residual quantity all do not detect).
Embodiment 8
Take by weighing 500g lard in beaker, put into the heat collecting type magnetic stirring apparatus and be preheated to 50 ℃.By molar ratio of methanol to oil is to measure absolute methanol at 6: 1, adds oil and weighs 1% NaOH, fully stirs, and NaOH is dissolved fully.The methanol solution that will be dissolved with NaOH then slowly adds in the oil reaction 1h under stirring condition.Reaction changes the mixed solution in the beaker over to separatory funnel and leaves standstill after accomplishing.Treat that methyl esters layer in the separatory funnel with after glycerin layer is separated fully, isolates the methyl esters layer, promptly obtain rough biodiesel (soap content is 2163ppm, and free glycerol content is 0.26%).
Rice hull ash elder generation is with the salt soak 3h of 3mol/L; Washing is to neutral then; After firing 6h under 500 ℃ of temperature, obtain the activation rice hull ash.Before the activation with activation after the specific area of rice hull ash be respectively 115m
2/ g and 270m
2/ g.Activation rice hull ash and white carbon, atlapulgite, silica gel and diatomite is composite; Get composite activation rice hull ash, wherein activation rice hull ash weight accounts for 50% of composite activation rice hull ash gross weight, and white carbon weight accounts for 20% of composite activation rice hull ash gross weight; Atlapulgite weight accounts for 10% of composite activation rice hull ash gross weight; Silica gel weight accounts for 10% of composite activation rice hull ash gross weight, and diatomite weight accounts for 10% of composite activation rice hull ash gross weight.
Take by weighing the rough biodiesel of 50g and place beaker, put into constant temperature blender with magnetic force and be preheated to 90 ℃, add oil again and weigh 4% composite activation rice hull ash; Mixing speed is to adsorb 80min under the condition of 2000r/min; Filter out spent sorbents then and obtain purifying biological diesel oil (soap residual quantity and dissociative glycerin residual quantity all do not detect).
Embodiment 9
Take by weighing the 500g rapeseed oil in beaker, put into the heat collecting type magnetic stirring apparatus and be preheated to 50 ℃.By molar ratio of methanol to oil is to measure absolute methanol at 6: 1, adds oil and weighs 1% NaOH, fully stirs, and NaOH is dissolved fully.The methanol solution that will be dissolved with NaOH then slowly adds in the oil reaction 1h under stirring condition.Reaction changes the mixed solution in the beaker over to separatory funnel and leaves standstill after accomplishing.Treat that methyl esters layer in the separatory funnel with after glycerin layer is separated fully, isolates the methyl esters layer, promptly obtain rough biodiesel (soap content is 2928ppm, and free glycerol content is 0.29%).
Rice hull ash elder generation is with the salt soak 4h of 3mol/L; Washing is to neutral then; After firing 3h under 600 ℃ of temperature, obtain the activation rice hull ash.Before the activation with activation after the specific area of rice hull ash be respectively 115m
2/ g and 283m
2/ g.Take by weighing the rough biodiesel of 50g and place beaker, put into constant temperature blender with magnetic force and be preheated to 30 ℃, add oil again and weigh 1% activation rice hull ash; Mixing speed is to adsorb 30min under the condition of 1000r/min; Filter out spent sorbents then and obtain purifying biological diesel oil (the soap residual quantity is 287ppm, and the dissociative glycerin residual quantity is 0.07%).
Embodiment 10
Take by weighing the 500g cottonseed oil in beaker, put into the heat collecting type magnetic stirring apparatus and be preheated to 50 ℃.By molar ratio of methanol to oil is to measure absolute methanol at 6: 1, adds oil and weighs 1% NaOH, fully stirs, and NaOH is dissolved fully.The methanol solution that will be dissolved with NaOH then slowly adds in the oil reaction 1h under stirring condition.Reaction changes the mixed solution in the beaker over to separatory funnel and leaves standstill after accomplishing.Treat that methyl esters layer in the separatory funnel with after glycerin layer is separated fully, isolates the methyl esters layer, promptly obtain rough biodiesel (soap content is 3165ppm, and free glycerol content is 0.31%).
Rice hull ash elder generation is with the salt soak 3h of 3mol/L; Washing is to neutral then; After firing 7h under 500 ℃ of temperature, obtain the activation rice hull ash.Before the activation with activation after the specific area of rice hull ash be respectively 115m
2/ g and 267m
2/ g.Activation rice hull ash and white carbon, atlapulgite and aluminium oxide is composite; Get composite activation rice hull ash; Wherein activation rice hull ash weight accounts for 60% of composite activation rice hull ash gross weight, and white carbon weight accounts for 20% of composite activation rice hull ash gross weight, and atlapulgite weight accounts for 10% of composite activation rice hull ash gross weight; Alumina weight accounts for 10% of composite activation rice hull ash gross weight.
Take by weighing the rough biodiesel of 50g and place beaker, put into constant temperature blender with magnetic force and be preheated to 50 ℃, add oil again and weigh 3% composite activation rice hull ash; Mixing speed is to adsorb 40min under the condition of 2000r/min; Filter out spent sorbents then and obtain purifying biological diesel oil (the soap residual quantity is 13ppm, and the dissociative glycerin residual quantity is 0.03%).
Claims (5)
1. the preparation method of an activation rice hull ash, it is characterized in that: it may further comprise the steps:
1) salt soak: earlier with the salt soak 2-6h of rice hull ash with 3mol/L;
2) washing drains: washing is to neutral and drain then;
3) high-temperature process: after firing 2-8h under the 500-600 ℃ of temperature, promptly get the activation rice hull ash again.
2. the application of activation rice hull ash in purifying biological diesel oil of the described method preparation of claim 1, it is characterized in that: it may further comprise the steps:
1) absorption: the activation rice hull ash is added in the biodiesel absorption soap and dissociative glycerin wherein;
2) separate: the activation rice hull ash that will be adsorbed with soap and dissociative glycerin is separated with biodiesel, gets purifying biological diesel oil.
3. the application of activation rice hull ash in purifying biological diesel oil of the described method preparation of claim 1, it is characterized in that: it may further comprise the steps:
1) composite: one or more of activation rice hull ash and silica gel, active carbon, atlapulgite, aluminium oxide, diatomite, white carbon are composite, and the content that makes the activation rice hull ash is more than 50%, composite activation rice hull ash;
2) absorption: composite activation rice hull ash is added in the biodiesel absorption soap and dissociative glycerin wherein;
3) separate: the composite activation rice hull ash that will be adsorbed with soap and dissociative glycerin is separated with biodiesel, gets purifying biological diesel oil.
4. according to claim 2 or 3 described application, it is characterized in that: in the said adsorption step, material temperature is 30-120 ℃, and mixing speed is 100-3000r/min, and adsorption time is 5-120min, and the adsorbent addition is the 1%-5% of biodiesel weight.
5. according to claim 2 or 3 described application, it is characterized in that: said separating step adopts centrifugal or isolated by filtration mode.
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Cited By (7)
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| CN103908946A (en) * | 2013-01-07 | 2014-07-09 | 丰益(上海)生物技术研发中心有限公司 | Mixed adsorbent, grease and preparation method thereof |
| CN103949211A (en) * | 2014-04-03 | 2014-07-30 | 安庆师范学院 | Method for producing adsorbent by using rice hull ash and application thereof |
| CN104119948A (en) * | 2013-04-23 | 2014-10-29 | 中国石油化工股份有限公司 | Method for removing impurities from biodiesel |
| CN104531350A (en) * | 2014-12-05 | 2015-04-22 | 昆明理工大学 | Biodiesel purification method |
| CN105524644A (en) * | 2016-01-15 | 2016-04-27 | 广西阔能霸能源科技开发有限责任公司 | Synthetic method for biodiesel |
| CN105969419A (en) * | 2016-01-15 | 2016-09-28 | 广西阔能霸能源科技开发有限责任公司 | Method for preparing high-quality biodiesel |
| CN108905982A (en) * | 2018-07-18 | 2018-11-30 | 广西南宁荣威德新能源科技有限公司 | It is a kind of for removing the preparation method of the adsorbent of aflatoxin in peanut oil |
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| CN103908946A (en) * | 2013-01-07 | 2014-07-09 | 丰益(上海)生物技术研发中心有限公司 | Mixed adsorbent, grease and preparation method thereof |
| CN104119948A (en) * | 2013-04-23 | 2014-10-29 | 中国石油化工股份有限公司 | Method for removing impurities from biodiesel |
| CN103949211A (en) * | 2014-04-03 | 2014-07-30 | 安庆师范学院 | Method for producing adsorbent by using rice hull ash and application thereof |
| CN104531350A (en) * | 2014-12-05 | 2015-04-22 | 昆明理工大学 | Biodiesel purification method |
| CN105524644A (en) * | 2016-01-15 | 2016-04-27 | 广西阔能霸能源科技开发有限责任公司 | Synthetic method for biodiesel |
| CN105969419A (en) * | 2016-01-15 | 2016-09-28 | 广西阔能霸能源科技开发有限责任公司 | Method for preparing high-quality biodiesel |
| CN105969419B (en) * | 2016-01-15 | 2018-10-26 | 浙江海鸿工业产品设计有限公司 | A kind of preparation method of high-quality biodiesel |
| CN108905982A (en) * | 2018-07-18 | 2018-11-30 | 广西南宁荣威德新能源科技有限公司 | It is a kind of for removing the preparation method of the adsorbent of aflatoxin in peanut oil |
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