CN106367411A - Preparation method of composite catalyst for producing biodiesel - Google Patents
Preparation method of composite catalyst for producing biodiesel Download PDFInfo
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- CN106367411A CN106367411A CN201610787359.7A CN201610787359A CN106367411A CN 106367411 A CN106367411 A CN 106367411A CN 201610787359 A CN201610787359 A CN 201610787359A CN 106367411 A CN106367411 A CN 106367411A
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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- C12N11/00—Carrier-bound or immobilised enzymes; Carrier-bound or immobilised microbial cells; Preparation thereof
- C12N11/02—Enzymes or microbial cells immobilised on or in an organic carrier
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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- C12N11/00—Carrier-bound or immobilised enzymes; Carrier-bound or immobilised microbial cells; Preparation thereof
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/64—Fats; Fatty oils; Ester-type waxes; Higher fatty acids, i.e. having at least seven carbon atoms in an unbroken chain bound to a carboxyl group; Oxidised oils or fats
- C12P7/6436—Fatty acid esters
- C12P7/649—Biodiesel, i.e. fatty acid alkyl esters
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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 a composite catalyst for producing biodiesel, and belongs to the technical field of oleochemical industry. Against the shortcomings that a traditional biodiesel composite catalyst at present time has low catalytic activity and poor stability, the method includes the steps that first, the aluminum ash is subjected to water separation and impurity removal, the aluminum ash is calcinated and mixed with sepiolite, then the mixture is internally modified through the process of hydrogen peroxide oxidation, lecithin and calcium silicate, and the composite catalyst carrier is prepared; next through the process of extracting enzyme in pichia fermented liquid, and through absorbing the enzyme with the composite catalyst carrier, the composite catalyst carrier is fixed in the internal structure, the stability of the carrier is increased, and thus a composite catalyst used in the production of biodiesel is obtained. The prepared composite catalyst through the combined action of metal and bio-enzyme makes up for the shortcomings that traditional biodiesel catalyst has poor stability; the catalyst has a very broad application prospect.
Description
Technical field
The invention discloses a kind of preparation method of the composite catalyst for producing biodiesel, belong to oil and fat chemical skill
Art field.
Background technology
Increasingly the air pollution that the exhausted and oil combustion of petroleum resources causes promotes the new alternative oil of people's exploitation
Reproducible green energy resource.The long-chain fatty acid methyl ester being generated with methanol ester exchange reaction by animal and plant fat, i.e. biological bavin
Oil, has the unrivaled excellent flammability of fossil diesel fuel, the feature of environmental protection and recyclability, it substitutes as potential fossil diesel fuel
Product and receive much concern.At present, the preparation method of biodiesel mainly has enzyme process and chemical method.Enzyme process reaction condition is gentle, but
In system, the presence of methanol is easily caused enzyme inactivation, and the viscosity of by-product glycerin is big, is liable to stick to enzyme surface, makes reaction
It is difficult to.If with the waste oil containing a large amount of free fatties for raw material production biodiesel, the high acid value in reaction system
Also lead to enzyme fast deactivation.Traditional chemical method generally adopts strong acid or strong alkali as a catalyst, there is product separation difficult, dirty
The problems such as dye thing discharge and equipment corrosion, it is not suitable for being produced the mistake of biodiesel by the waste oil containing high acid value (more fatty acid)
Journey.Using solid acid heterogeneous catalyst (as molecular sieve catalyst, ion exchange resin, heteropolyacid catalyst and solid super-strong acid)
Above-mentioned deficiency can be prevented effectively from.But, these solid acid catalyst preparation costs are high, catalysis activity is relatively low, less stable
Defect is it is difficult to effectively converting oils and fatss (especially waste oil) is biodiesel.Therefore, research and develop cheap, environmental friendliness, efficient
New catalyst is extremely urgent.
Content of the invention
Present invention mainly solves technical problem: there is catalysis activity for current traditional biological diesel oil composite catalyst
Low, less stable defect, the present invention first passes through aluminum ash wet concentration, remove impurity, and itself and meerschaum calcined mixed are subsequently passed through
Hydrogen peroxide oxidation, lecithin and calcium silicates, to its inter-modification, prepare composite catalyst carrier, then finish red ferment by extracting
Enzyme in female fermentation liquid, by composite catalyst carrier adsorptive enzyme, being fixed on internal structure, increasing stability, thus being prepared into
For producing the composite catalyst of biodiesel, the composite catalyst of present invention preparation passes through metal and enzyme collective effect,
Compensate for traditional biological diesel catalytic converter and stablize poor defect, there is wide application prospect.
In order to solve above-mentioned technical problem, the technical solution adopted in the present invention is:
(1) 1:2 in mass ratio, take aluminum ash and distilled water put in blender, with 120r/min stir 10～12min, standing 8～
12min, removes the impurity floating on the water surface, then is filtered, and filtering residue is put in air-dry machine and air-dries, subsequently 1:5 in mass ratio,
Take dried filtering residue and meerschaum to stir, put in calcining furnace, design temperature is 400～500 DEG C, insulation calcining 2～
3h；
(2) after above-mentioned calcining terminates collect calcined material, count by weight, take 50～60 parts of calcined material, 30～35 parts
1.5mol/l hydrogen peroxide, 12～14 lecithin, 4～6 parts of calcium silicates and 1～3 part of sodium chloride, put in container, are placed in ultrasonic
In agitator, it is spray-dried after supersound process 30～40min, collect dried object, place in liquid nitrogen flash freezer machine, design temperature-
50～-40 DEG C, freezing processing 50～60s；
(3) after above-mentioned freezing, frozen material is put in mill and is milled, cross 100 mesh sieves, the granule that will sieve heats up naturally
To room temperature, obtain composite catalyst carrier, standby；
(4) count by weight, take 34～36 parts of peptones, 22～24 parts of chlorellas, 18～19 parts of distilled water, 12～14 parts of ferment
Female extractum, 8～11 portions of sucrose, 1～2 part of ammonium hydrogen carbonate and 0.6～0.9 part of potassium dihydrogen phosphate, put in fermentation tank, by inoculum concentration
4～7%, Pichia sp. is added in fermentation tank, design temperature is 22～34 DEG C, sealing and fermenting 1～2 day, collect fermentation liquid；
(5) above-mentioned fermentation liquid is put in centrifuge, 10～15min is centrifuged with 4000r/min, collect precipitation, using precipitation matter
The 1.2mol/l hydrochloric acid solution washing precipitation of 1～2 times of amount, then it is molten for 7.4 phosphoric acid buffers that precipitation is placed in 2～3 times of ph of its quality
In liquid, it is placed in Ultrasound Instrument, setting power is 500～550w, temperature is 2～5 DEG C, ultrasonic 5～6s every time is spaced 3～5s,
Total time be 35～40min, subsequently ultrasonic rear mixture is filtered, collect filtrate and be concentrated in vacuo to original volume 40～
45%, collect concentrated solution, 1:2 in mass ratio, by standby for step (3) composite catalyst carrier and concentrated solution mix homogeneously, then put
Stand 1～2h after being placed in ultrasonic 10～15min in ultrasonator, be spray-dried, collect dried object, you can must be used for giving birth to
The composite catalyst of generation diesel oil.
The application process of the present invention is: take 20～30g biological waste oil product, 5～8g methanol, biological waste oil product 0.5～
The composite catalyst for producing biodiesel that 2.0% present invention is obtained, is placed in there-necked flask, and design temperature is 75 DEG C, beats
Open condensed water, mechanical agitation mixing liquid under water bath condition, stopped reaction after 2～3h, mother solution is poured out after terminating by reaction, decompression
Sucking filtration more rotated evaporation after reclaim methanol, vacuum be 0.090～0.095mpa, temperature be 170～240 DEG C under the conditions of enter
Row vacuum distillation is processed, and collects fraction, and after testing, the yield of gained diesel samples increases by 80～90% compared with conventional diesel.
The invention has the beneficial effects as follows:
(1) the biodiesel catalyst stable in properties of gained, catalytic efficiency improves 60～70% compared with traditional catalyst；
(2) catalyst of gained of the present invention makes the purity of biodiesel increase by 80～90%, has larger application potential, is suitable for
Large-scale production and application.
Specific embodiment
1:2 in mass ratio, takes aluminum ash and distilled water to put in blender, stirs 10～12min with 120r/min, stand 8
～12min, removes and floats on the impurity of the water surface, then filtered, and filtering residue is put in air-dry machine and air-dries, and subsequently in mass ratio 1:
5, take dried filtering residue and meerschaum to stir, put in calcining furnace, design temperature is 400～500 DEG C, be incubated calcining 2
～3h；Collect calcined material after above-mentioned calcining terminates, count by weight, take 50～60 parts of calcined material, 30～35 parts of 1.5mol/
L hydrogen peroxide, 12～14 lecithin, 4～6 parts of calcium silicates and 1～3 part of sodium chloride, put in container, are placed in ultrasonator
In, it is spray-dried after supersound process 30～40min, collect dried object, place in liquid nitrogen flash freezer machine, design temperature -50～-40
DEG C, freezing processing 50～60s；After above-mentioned freezing, frozen material is put in mill and is milled, cross 100 mesh sieves, will sieve
Granule warms naturally to room temperature, obtains composite catalyst carrier, standby；Count by weight, take 34～36 parts of peptones, 22～24
Part chlorella, 18～19 parts of distilled water, 12～14 parts of yeast extracts, 8～11 parts of sucrose, 1～2 part of ammonium hydrogen carbonate and 0.6～0.9
Part potassium dihydrogen phosphate, puts in fermentation tank, by inoculum concentration 4～7%, Pichia sp. is added in fermentation tank, design temperature is 22
～34 DEG C, sealing and fermenting 1～2 day, collect fermentation liquid；Above-mentioned fermentation liquid is put in centrifuge, with 4000r/min centrifugation 10～
15min, collects precipitation, using the 1.2mol/l hydrochloric acid solution washing precipitation of 1～2 times of quality of precipitation, then precipitation is placed in its matter
2～3 times of ph of amount are in 7.4 phosphate buffer solutions, are placed in Ultrasound Instrument, and setting power is 500～550w, and temperature is 2～5
DEG C, ultrasonic 5～6s every time, it is spaced 3～5s, total time is 35～40min, subsequently ultrasonic rear mixture is filtered, collect
Filtrate is simultaneously concentrated in vacuo to the 40～45% of original volume, collects concentrated solution, 1:2 in mass ratio, by standby composite catalyst carrier
With concentrated solution mix homogeneously, then it is positioned over and stands 1～2h after ultrasonic 10～15min in ultrasonator, be spray-dried, receive
Collection dried object, you can must be used for producing the composite catalyst of biodiesel.
Example 1
1:2 in mass ratio, takes aluminum ash and distilled water to put in blender, stirs 10min with 120r/min, stand 8min, remove
Float on the impurity of the water surface, then filtered, filtering residue is put in air-dry machine and air-dries, subsequently 1:5 in mass ratio, take dried
Filtering residue and meerschaum stir, and put in calcining furnace, and design temperature is 400 DEG C, insulation calcining 2h；After above-mentioned calcining terminates
Collect calcined material, count by weight, take 50 parts of calcined material, 30 parts of 1.5mol/l hydrogen peroxide, 12 lecithin, 4 parts of calcium silicates and 1
Part sodium chloride, puts in container, is placed in ultrasonator, is spray-dried after supersound process 30min, collects dried object, then
Put in liquid nitrogen flash freezer machine, -50 DEG C of design temperature, freezing processing 50s；After above-mentioned freezing, frozen material is put in mill
Milled, crossed 100 mesh sieves, the granule that will sieve warms naturally to room temperature, obtains composite catalyst carrier, standby；By weight
Meter, takes 34 parts of peptones, 22 parts of chlorellas, 18 parts of distilled water, 12 parts of yeast extracts, 8 portions of sucrose, 1 part of ammonium hydrogen carbonate and 0.6 part
Potassium dihydrogen phosphate, puts in fermentation tank, by inoculum concentration 4%, Pichia sp. is added in fermentation tank, design temperature is 22 DEG C, close
Seal ferment 1 day, collects fermentation liquid；Above-mentioned fermentation liquid is put in centrifuge, 10min is centrifuged with 4000r/min, collect precipitation,
Washed using the 1.2mol/l hydrochloric acid solution of 1 times of quality of precipitation and precipitate, then precipitation is placed in 2 times of ph of its quality and delay for 7.4 phosphoric acid
Rush in solution, be placed in Ultrasound Instrument, setting power is 500w, temperature is 2 DEG C, ultrasonic 5s every time is spaced 3s, total time is
35min, subsequently filters to ultrasonic rear mixture, collects filtrate and is concentrated in vacuo to the 40% of original volume, collects concentrated solution,
1:2 in mass ratio, by standby composite catalyst carrier and concentrated solution mix homogeneously, then is positioned over ultrasonic in ultrasonator
Stand 1h after 10min, be spray-dried, collect dried object, you can must be used for producing the composite catalyst of biodiesel.
Take 20g biological waste oil product, 5g methanol, biological waste oil product 0.5% present invention be obtained for producing biodiesel
Composite catalyst, be placed in there-necked flask, design temperature be 75 DEG C, open condensed water, under water bath condition mechanical agitation mixing
Liquid, stopped reaction after 2h, reaction terminate after mother solution is poured out, decompression sucking filtration more rotated evaporation after reclaim methanol, in vacuum
Spend for 0.090mpa, temperature carries out vacuum distillation process under the conditions of being 170 DEG C, collect fraction, after testing, gained diesel samples
Yield increases by 80% compared with conventional diesel.
Example 2
1:2 in mass ratio, takes aluminum ash and distilled water to put in blender, stirs 11min with 120r/min, stand 10min, remove
Float on the impurity of the water surface, then filtered, filtering residue is put in air-dry machine and air-dries, subsequently 1:5 in mass ratio, take dried
Filtering residue and meerschaum stir, and put in calcining furnace, and design temperature is 450 DEG C, insulation calcining 2.5h；Terminate in above-mentioned calcining
Collect calcined material afterwards, count by weight, take 55 parts of calcined material, 33 parts of 1.5mol/l hydrogen peroxide, 13 lecithin, 5 parts of calcium silicates
And 2 parts of sodium chloride, put in container, be placed in ultrasonator, be spray-dried after supersound process 35min, collect dried object,
Place in liquid nitrogen flash freezer machine, -45 DEG C of design temperature, freezing processing 55s；After above-mentioned freezing, frozen material is put into mill
In milled, cross 100 mesh sieves, the granule that will sieve warms naturally to room temperature, obtains composite catalyst carrier, standby；By weight
Number meter, takes 35 parts of peptones, 23 parts of chlorellas, 18.5 parts of distilled water, 13 parts of yeast extracts, 10 parts of sucrose, 1.5 parts of ammonium hydrogen carbonate
And 0.8 part of potassium dihydrogen phosphate, put in fermentation tank, by inoculum concentration 6%, Pichia sp. is added in fermentation tank, design temperature is
29 DEG C, sealing and fermenting 1.5 days, collect fermentation liquid；Above-mentioned fermentation liquid is put in centrifuge, 13min is centrifuged with 4000r/min,
Collect precipitation, using the 1.2mol/l hydrochloric acid solution washing precipitation of 1.5 times of quality of precipitation, then precipitation is placed in 2.5 times of its quality
Ph is in 7.4 phosphate buffer solutions, is placed in Ultrasound Instrument, and setting power is 530w, and temperature is 4 DEG C, ultrasonic 5.5s every time,
Every 4s, total time is 37min, subsequently ultrasonic rear mixture is filtered, and collects filtrate and is concentrated in vacuo to original volume
43%, collect concentrated solution, 1:2 in mass ratio, by standby composite catalyst carrier and concentrated solution mix homogeneously, then be positioned over ultrasonic
Stand 1.5h after ultrasonic 13min in agitator, be spray-dried, collect dried object, you can must be used for producing biodiesel
Composite catalyst.
Take 30g biological waste oil product, 8g methanol, biological waste oil product 2.0% present invention be obtained for producing biodiesel
Composite catalyst, be placed in there-necked flask, design temperature be 75 DEG C, open condensed water, under water bath condition mechanical agitation mixing
Liquid, stopped reaction after 3h, reaction terminate after mother solution is poured out, decompression sucking filtration more rotated evaporation after reclaim methanol, in vacuum
Spend for 0.095mpa, temperature carries out vacuum distillation process under the conditions of being 240 DEG C, collect fraction, after testing, gained diesel samples
Yield increases by 90% compared with conventional diesel.
Example 3
1:2 in mass ratio, takes aluminum ash and distilled water to put in blender, stirs 12min with 120r/min, stand 12min, remove
Float on the impurity of the water surface, then filtered, filtering residue is put in air-dry machine and air-dries, subsequently 1:5 in mass ratio, take dried
Filtering residue and meerschaum stir, and put in calcining furnace, and design temperature is 500 DEG C, insulation calcining 3h；After above-mentioned calcining terminates
Collect calcined material, count by weight, take 60 parts of calcined material, 35 parts of 1.5mol/l hydrogen peroxide, 14 lecithin, 6 parts of calcium silicates and 3
Part sodium chloride, puts in container, is placed in ultrasonator, is spray-dried after supersound process 40min, collects dried object, then
Put in liquid nitrogen flash freezer machine, -40 DEG C of design temperature, freezing processing 60s；After above-mentioned freezing, frozen material is put in mill
Milled, crossed 100 mesh sieves, the granule that will sieve warms naturally to room temperature, obtains composite catalyst carrier, standby；By weight
Meter, takes 36 parts of peptones, 24 parts of chlorellas, 19 parts of distilled water, 14 parts of yeast extracts, 11 parts of sucrose, 2 parts of ammonium hydrogen carbonate and 0.9
Part potassium dihydrogen phosphate, puts in fermentation tank, by inoculum concentration 7%, Pichia sp. is added in fermentation tank, design temperature is 34 DEG C,
Sealing and fermenting 2 days, collects fermentation liquid；Above-mentioned fermentation liquid is put in centrifuge, 15min is centrifuged with 4000r/min, it is heavy to collect
Form sediment, using the 1.2mol/l hydrochloric acid solution washing precipitation of 2 times of quality of precipitation, then precipitation is placed in 3 times of ph of its quality for 7.4 phosphoric acid
In buffer solution, it is placed in Ultrasound Instrument, setting power is 550w, temperature is 5 DEG C, ultrasonic 6s every time is spaced 5s, total time is
40min, subsequently filters to ultrasonic rear mixture, collects filtrate and is concentrated in vacuo to the 45% of original volume, collects concentrated solution,
1:2 in mass ratio, by standby composite catalyst carrier and concentrated solution mix homogeneously, then is positioned over ultrasonic in ultrasonator
Stand 2h after 15min, be spray-dried, collect dried object, you can must be used for producing the composite catalyst of biodiesel.
Take 25g biological waste oil product, 7g methanol, biological waste oil product 1.5% present invention be obtained for producing biodiesel
Composite catalyst, be placed in there-necked flask, design temperature be 75 DEG C, open condensed water, under water bath condition mechanical agitation mixing
Liquid, stopped reaction after 2.5h, reaction terminate after mother solution is poured out, decompression sucking filtration more rotated evaporation after reclaim methanol, true
Reciprocal of duty cycle is 0.093mpa, and temperature carries out vacuum distillation process under the conditions of being 220 DEG C, collects fraction, after testing, gained diesel samples
Yield compared with conventional diesel increase by 85%.
Claims (1)
1. a kind of preparation method of the composite catalyst for producing biodiesel is it is characterised in that concrete preparation process is:
(1) 1:2 in mass ratio, take aluminum ash and distilled water put in blender, with 120r/min stir 10～12min, standing 8～
12min, removes the impurity floating on the water surface, then is filtered, and filtering residue is put in air-dry machine and air-dries, subsequently 1:5 in mass ratio,
Take dried filtering residue and meerschaum to stir, put in calcining furnace, design temperature is 400～500 DEG C, insulation calcining 2～
3h；
(2) after above-mentioned calcining terminates collect calcined material, count by weight, take 50～60 parts of calcined material, 30～35 parts
1.5mol/l hydrogen peroxide, 12～14 lecithin, 4～6 parts of calcium silicates and 1～3 part of sodium chloride, put in container, are placed in ultrasonic
In agitator, it is spray-dried after supersound process 30～40min, collect dried object, place in liquid nitrogen flash freezer machine, design temperature-
50～-40 DEG C, freezing processing 50～60s；
(3) after above-mentioned freezing, frozen material is put in mill and is milled, cross 100 mesh sieves, the granule that will sieve heats up naturally
To room temperature, obtain composite catalyst carrier, standby；
(4) count by weight, take 34～36 parts of peptones, 22～24 parts of chlorellas, 18～19 parts of distilled water, 12～14 parts of ferment
Female extractum, 8～11 portions of sucrose, 1～2 part of ammonium hydrogen carbonate and 0.6～0.9 part of potassium dihydrogen phosphate, put in fermentation tank, by inoculum concentration
4～7%, Pichia sp. is added in fermentation tank, design temperature is 22～34 DEG C, sealing and fermenting 1～2 day, collect fermentation liquid；
(5) above-mentioned fermentation liquid is put in centrifuge, 10～15min is centrifuged with 4000r/min, collect precipitation, using precipitation matter
The 1.2mol/l hydrochloric acid solution washing precipitation of 1～2 times of amount, then it is molten for 7.4 phosphoric acid buffers that precipitation is placed in 2～3 times of ph of its quality
In liquid, it is placed in Ultrasound Instrument, setting power is 500～550w, temperature is 2～5 DEG C, ultrasonic 5～6s every time is spaced 3～5s,
Total time be 35～40min, subsequently ultrasonic rear mixture is filtered, collect filtrate and be concentrated in vacuo to original volume 40～
45%, collect concentrated solution, 1:2 in mass ratio, by standby for step (3) composite catalyst carrier and concentrated solution mix homogeneously, then put
Stand 1～2h after being placed in ultrasonic 10～15min in ultrasonator, be spray-dried, collect dried object, you can must be used for giving birth to
The composite catalyst of generation diesel oil.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1911511A (en) * | 2006-09-04 | 2007-02-14 | 江苏工业学院 | Method for preparing synthesizing biodiesel oil solid acid catalyst by non-water solvent |
| CN101028593A (en) * | 2007-04-09 | 2007-09-05 | 张伟 | Catalyst for generating biological diesel oil and catalystic pyrolysis for producing biological diesel oil |
| CN101631857A (en) * | 2007-01-08 | 2010-01-20 | 转换生物柴油有限公司 | Immobilized interfacial enzymes of improved and stabilized activity |
| CN101717801A (en) * | 2009-12-10 | 2010-06-02 | 中南林业科技大学 | Method for preparing biodiesel by using corn core immobilized lipase |
-
2016
- 2016-08-31 CN CN201610787359.7A patent/CN106367411A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1911511A (en) * | 2006-09-04 | 2007-02-14 | 江苏工业学院 | Method for preparing synthesizing biodiesel oil solid acid catalyst by non-water solvent |
| CN101631857A (en) * | 2007-01-08 | 2010-01-20 | 转换生物柴油有限公司 | Immobilized interfacial enzymes of improved and stabilized activity |
| CN101028593A (en) * | 2007-04-09 | 2007-09-05 | 张伟 | Catalyst for generating biological diesel oil and catalystic pyrolysis for producing biological diesel oil |
| CN101717801A (en) * | 2009-12-10 | 2010-06-02 | 中南林业科技大学 | Method for preparing biodiesel by using corn core immobilized lipase |
Non-Patent Citations (4)
| Title |
|---|
| NP ASRI 等: "Development of heterogeneous alumina supported base catalyst for biodiesel production", 《INTERNATIONAL PROCEEDINGS OF CHEMICAL BIOLOGICAL & ENVIRONMENTA》 * |
| 唐玉斌: "《水污染控制工程》", 31 July 2006 * |
| 梁华定: "《基础实验 1 无机化学实验》", 30 June 2011 * |
| 邓伟 等: "利用毕赤酵母发酵废液培养原始小球藻的研究", 《生物技术通报》 * |
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