CN101050374A - Method for preparing biologic diesel oil from cottonseeds directly - Google Patents
Method for preparing biologic diesel oil from cottonseeds directly Download PDFInfo
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- CN101050374A CN101050374A CNA2007100155144A CN200710015514A CN101050374A CN 101050374 A CN101050374 A CN 101050374A CN A2007100155144 A CNA2007100155144 A CN A2007100155144A CN 200710015514 A CN200710015514 A CN 200710015514A CN 101050374 A CN101050374 A CN 101050374A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
- Y02P30/20—Technologies relating to oil refining and petrochemical industry using bio-feedstock
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Abstract
This invention discloses a method for producing biodiesel oil from cottonseeds. The method comprises: (1) peeling cottonseeds, expanding, and leaching in a mixed solvent of ethanol and methanol to leach out gossypol and crude cotton oil, and obtain gossypol-free wet meal and a mixed solution of solvent/crude cotton oil; (2) sending the mixed solution of solvent/crude cotton oil to an esterification kettle, adding solid catalyst, and esterifying to obtain biodiesel oil. The method has such advantages as little waste discharge, mild reaction conditions (normal temperature and normal pressure), short reaction time, few side reactions, high conversion rate, and high product purity.
Description
(1) technical field
The present invention relates to a kind of method of bio-diesel oil of producing, particularly a kind of method of preparing biologic diesel oil from cottonseeds directly.
(2) background technology
Biofuel is a fatty acid methyl ester, can be used as the replacement product of oil fuel-diesel oil, and is renewable and have biological degradability because of its resource, so be named biofuel.Biofuel is mainly with the foots oil of the inferior waste oil of vegetables oil (as Oleum Gossypii semen, rapeseed oil, soybean oil), animal oil (garbage grease of meat processing combine) or instant noodles, catering trade, swill oil, oil-fat plant and to produce the deodorization distillate that produces in the salad oil process be raw material, at a certain temperature, make catalyzer and methyl alcohol (or other lower alcohol) generation alcoholysis reaction (transesterify) with acid, alkali or enzyme, generate corresponding fatty acid methyl ester and glycerine, light phase product one fatty acid methyl ester that obtains after separation of glycerin is biofuel.This research is raw material with the cottonseed, directly extract grease and be converted into biofuel without squeezing, merge the deep processing technology of cotton cake dregs again, extract protein concentrate, phytic acid, polyphenol, polysaccharide etc. and have high value-added product, form a complete production chain of cottonseed development and use.This product can add in the 0# diesel oil by a certain percentage to alleviate the diesel oil supply situation of growing tension.
Because the increase day by day of the exhausted day by day and Motor vehicles of underground petroleum resource shows the imbalance between supply and demand day of diesel oil outstanding.China's diesel oil annual production is about 8,000 ten thousand tons, and the breach in diesel oil every year and is the trend that increases year by year about 2,000 ten thousand tons.Therefore, the substitute products of seeking a kind of diesel oil have caused countries in the world government and energy expert's great attention with the oil crisis that solves growing tension.The energy of the alternative petroleum products that has found at present has the high-temperature split product of liquid hydrogen, methyl alcohol, ethanol, coal cracked oil, straw and fatty acid methyl ester etc.Oneself promotes the use of ethanol in gasoline.Because the hydrocarbon chain of diesel oil is longer, and is relatively poor with the alcoholic acid mutual solubility, can't add use at present in diesel oil.Discovering, is that the carbon chain lengths of lipid acid in the fatty acid methyl ester produced of raw material mainly is C with the animal and vegetable oil
16And C
18And the charcoal chain length in the petroleum diesel molecule mainly is C
15-18, both molecule charcoal chain lengths are very approaching, are a kind of more satisfactory diesel oil substitutes.Biofuel is compared with petroleum diesel has following characteristics:
1. fatty acid methyl ester and petroleum diesel have close molecule carbon chain structure, mutual solubility between the two is good, heat enthalpy value and cetane value are more approaching, combustionproperty is good, adaptability to diesel motor is strong, adds to by a certain percentage in the diesel oil and needn't can use the structure transformation of diesel motor.
2. the biofuel resource has recyclability.Petroleum resources are Nonrenewable resources, and the animal and vegetable oil resource is passed through agricultural and biologists' effort, but supply can be exhausted, also can be converted into grease as bagasse and fecula under action of microorganisms.A large amount of in addition woody oleiferous plants, wild oil plant and cereal oil plant all can be converted into the raw material of production biofuel.
3. has good low-temperature engine starting performance.Additive-free cold filter clogging temperature reaches-20 ℃.
4. has oilness preferably.Make the wear rate of oil injection pump, engine cylinder-body and connecting rod low, long service life.
5. do not contain branched structure in the biofuel molecule, have higher flash-point and stability, do not belong to hazardous substance, production, transportation, storage and use are all more convenient, so security increases.
6. biofuel has good environmental-protecting performance.The one, sulphur content is low in the biofuel, and the not even sulfur-bearing that has can reduce 30% the sulfurous gas and the quantity discharged of sulfide, can reduce the pollution to atmospheric environment; The 2nd, do not contain benzene and polycyclic aromatic hydrocarbons in the biofuel, in the vehicle exhaust that combustion processes produces, can not produce benzo pyrrole class carcinogens; The 3rd, the biological degradability of biofuel is good, and because of biofuel derives from animal and plant, degradable is carbonic acid gas and water under microbial process.Even in production and use, leak and also can not produce permanent pollution to soil and water source.Therefore biofuel is a kind of novel, environmental protection, green and the renewable energy resources.Biofuel not only can be used as the power fuel of diesel motor but also is the high-grade fuel of heat conducting oil boiler and oil-firing boiler.
In the world the research of biofuel is had the history of more than two decades.It is the factory of raw material production biofuel that Germany just built up with the rapeseed oil as far back as the early 1990s in last century.Realized suitability for industrialized production in many countries such as Japan, Australia and Europe at present.For example built up the continuous production device of the several daily output 300T of family vegetable seed biofuel in Germany, the gross annual output amount has surpassed 550KT.In Germany, the automobile that benz, BMW, masses and Adui manufacturer produce all allows to use biofuel and need not engine is reequiped.At B20 biofuel goods produced in USA and that use, wherein contain 20% biofuel and 80% petrifaction diesel.In Europe, mainly be the raw material production biofuel with the rapeseed oil; In Japan and Australian, mainly the discarded edible oil with catering trade is the raw material production biofuel; In China, the research of biofuel still is in the development starting stage, existing man universities and colleges of number and scientific research institution have carried out the research work of this respect.It is reported that existing daily output 5-10 ton intermittent type biofuel device is gone into operation, and mainly produces the fuel substitute of oil-firing boiler.
Squeezing or leach the hair cotton oil obtain the shortcoming of himself is arranged from cottonseed: the one, acid value is higher, generally about 8mgKOH/g, have up to 20mgKOH/g; The 2nd, contain the toxic substance gossypol; The 3rd, contain higher pesticide residue.Therefore hair cotton oil must could eat after the alkali refining washing.The refining yield of Oleum Gossypii semen is lower, generally has only 80%, and produces a large amount of alkali waste waters in refining process, has not only wasted resource but also polluted environment.Therefore, study a kind of novel process, new technology, cottonseed is converted into biofuel, reducing secondary, to produce the cost waste that grease is reprocessed into to biofuel be very urgent, and meaning is very great.
(3) summary of the invention
The present invention provides the method for a kind of cost preparing biologic diesel oil from cottonseeds directly low, simple to operate in order to remedy the deficiencies in the prior art.
The present invention is achieved through the following technical solutions:
A kind of method of preparing biologic diesel oil from cottonseeds directly, its special character is: be raw material with the cottonseed, through peel off, give birth to embryo expanded after, adopting ethanol and methyl alcohol mixed liquor is that solvent leaches gossypol, hair cotton oil in leacher, obtains the wet dregs of rice of removing cotton phenol and solvent hair cotton oil mixed solution; Solvent hair cotton oil mixed solution can directly enter reaction kettle of the esterification, adds solid catalyst, and resultant of reaction is biofuel.
The method of preparing biologic diesel oil from cottonseeds directly of the present invention, described leacher temperature is 50-55 ℃, and be 100-160 minute running period, and going into to soak the material temperature is 50-55 ℃, and solvent is that methyl alcohol and alcoholic acid mass ratio are 7: 3 mixed solution.
The method of preparing biologic diesel oil from cottonseeds directly of the present invention is a kind of method with shwoot formula steam flow exsolution drying, to the dry slaking of the wet dregs of rice precipitation of removing cotton phenol, obtains the removing cotton phenol dregs of rice; Mixed solution to solvent and hair cotton oil directly carries out esterification without separating, and makes method of bio-diesel oil.
Resources supplIes of the present invention is analyzed:
1, aboundresources.China is the main in the world cotton big country that produces, national lint yield 6400KT in 2005, and cottonseed quantity provides the raw material guarantee at 9000KT for producing biofuel; 2, utilizing the cottonseed resource, help agriculture industrialization, also is an effective way of increasing peasant income; 3, reduced the environmental pollution in the refining process; 4, prolong the industrial chain of grease processing industry, can evade grease processing risk; 5, biofuel belongs to oil-fat chemical products, can share resources such as water, electricity, vapour, jar with oil-fat plant; 6, this novel energy industry of development biofuel can be cultivated new growth engines, meets the strategic idea of the novel energy chemical base of government's proposition; 7, the fatty acid component of sweet three esters of cotton oil mainly is 16 carbon saturated acids and 18 carbon oil acid, constitutes very similarly to the carbochain of diesel oil, be difficult for that in engine oxidation, polymerization, fission etc. take place and pay reaction, this be other grease the advantage that can not compare.8, the feed protein of China extremely lacks.And after the cottonseed oil expression more than 500 ten thousand tons of cotton cake dregs are arranged approximately.The crude protein content of cotton cake dregs is the fine vegetable-protein generally more than 41%, is a protein resource that potential is very huge.Yet the phytic acid in the grouts, polyphenolic substance etc. are harmful or the existence of anti-nutrition component, have reduced the biological value and the application that has limited cottonseed protein of grouts.A large amount of grouts can only add in a small amount of ratio and go in the animal-feed or as fertilizer, caused the significant wastage of protein resource.If with the raw material of cottonseed as bioenergy, its byproduct grouts are developed as feed protein and high value-added product again, both can reduce the cost of biofuel greatly, can satisfy the contradiction that the feed protein of China extremely lacks again.It is the good thing of killing two birds with one stone.
My company just carried out the research work of biofuel since 2002, consulting on the basis of a large amount of bibliographys, grease to different varieties, select different catalyzer for use, under different reaction conditionss, carry out little sample testing, accumulate mass data, grasped first-hand data, obtained certain scientific payoffs.Now obtain poor quality oils such as high acid value cottonseed oil, waste oils and fats and produced the technology of biofuel.
The present invention is raw material with the cottonseed, through peel off, give birth to embryo expanded after, adopting ethanol+methyl alcohol is that solvent leaches gossypol, Oleum Gossypii semen in leacher, obtains the mixed solution of the wet dregs of rice of removing cotton phenol and solvent hair cotton oil.With shwoot formula steam flow exsolution drying technology,, obtain the removing cotton phenol dregs of rice to the dry slaking of the wet dregs of rice precipitation of removing cotton phenol.Adopt present method, each operation cold operation can be realized dephenolize simultaneously, produces biofuel and produce the suitability for industrialized production of feed with qualified cottonseed protein.Gained cottonseed protein dephenolization effect is good, of light color, protein and amino acid destroy fewly, and the toxin removal effect is good, is of high nutritive value; The gossypol of deviating from can be made into gossypol anilinum, is widely used in pharmacy, rubber and plastics industry etc.Gained solvent hair cotton oil lighter color can directly enter reaction kettle of the esterification, adds solid catalyst, and resultant of reaction is biofuel.If merge the deep processing technology of cotton cake dregs again, extract protein concentrate, phytic acid, polyphenol, polysaccharide etc. and have high value-added product, then can form a complete production chain of cottonseed development and use.
Whole process of production does not produce solid waste basically, and waste liquid, wastewater discharge also seldom belong to environment-friendly type production.Aforementioned production method reaction conditions gentleness (normal temperature, normal pressure), the reaction times is short, and side reaction is few, and conversion rate of products and purity are all higher.
The present invention is raw material with the cottonseed, and the main contents of research and characteristic part are as follows:
1, mainly there are problems such as process procedure is many, cost height in exploitation at biofuel, develops the direct conversion process of cottonseed without squeezing production biofuel.This operational path has significantly reduced production link, and production cost significantly reduces, and helps realizing the industrialization of biofuel.
2. in the biofuel conversion process, adopt the novel process of expanded cottonseed, the leaching of normal temperature and pressure alcohols and high activity solid catalyst esterification two-step approach, product is easy to separate, the rate that goes out hair cotton oil improves nearly 1 percentage point, and production process does not produce too much waste water and spent acid (alkali) liquid, reduce secondary pollution, improved the quality of biofuel and cotton dregs.
3. the grouts after the expanded cottonseed production biofuel belong to the high protein detoxification dregs of rice, protein content is more than 45%, free surface phenol is below 400mg/kg, 600mg/kg well below the international standard regulation, protein concentrate can be extracted, phytic acid, cottonseed polysaccharide, cottonseed polyphenol etc. can also be from the waste liquid that extracts protein concentrate, reclaimed continuously.This overlaps production technique, can comprehensive complete construction, also can build step by step, and independently separately become line.
Comprehensive benefit analysis of the present invention:
After this research project success, if can apply, will produce huge social, environment and economic implications in the whole nation.
1. social effect.China is maximum developing country, also is the most national in the present Economic development, and the energy development strategy is occupied critical role all the time in the Economic development of China.The relative shortage of high-quality petroleum-based energy and energy development and utilize poor efficiency in the process and the environmental pollution that caused just becoming the important restraining factors of China's economy and society Sustainable development.Since China in 1993 became net import of oil state, the petroleum import amount was with the speed increment in every year 4%.China's oil import volume in 2005 accounts for 1/3 of domestic petroleum consumption at 100,000,000 tons.The huge petroleum import of numeral also injures China's strategic security, the knowledgeable people has appealed to set up the China's oil strategic reserves, but along with petroleum resources are petered out, the future world various countries will be more fierce to the contention of petroleum-based energy, set up strategic reserves and can not fundamentally solve the petroleum resources shortage problem.This renewable and environment friendly novel energy of development biofuel must be the research direction of China from now on.
2. ecotope meaning.Mass production and use biofuel have good ecotope meaning: (1) biofuel derives from renewable resource, increases the production of biofuel, can reduce the exploitation and the consumption of fossil energy, thereby reduces the excessive destruction to ball ecological environment.(2) CO that discharged of biofuel burning
2Far below the CO that is absorbed in the growing process
2, therefore use biofuel can reduce CO greatly
2Discharging and greenhouse gases accumulation, alleviate and fundamentally solve the global warming that caused because of the greenhouse gases accumulation this is harmful to human great environmental problem.(3) biofuel goes up not sulfur-bearing substantially, can significantly reduce this great environmental hazard of acid rain that causes because of sulfur dioxide emissions.(4) biofuel does not contain benzene and other has the aromatic compound of carinogenicity, uses the back exhaust gas discharged can not produce this class objectionable impurities yet.(5) contain in the biofuel molecule in oxygen and have good self-lubricating property, be the diesel vehicle sufficient combustion of power with biofuel, burning is CH in the tail gas afterwards
N, CO
X, NO
XDescend significantly with the carbon residue particulate emission, can effectively control topsoil.(6) biofuel is not volatile, is easy to biological degradation, as revealing in production and the use, can not pollute ground and water body, belongs to environmentally friendly energy product.
3. economic implications.At present the cottonseed price is at about 1500 yuan per ton, bio-diesel yield 18%, 5000 yuan per ton of price; Meal yield 60%, 1400 yuan per ton of price; Hatching rate 20%, 400 yuan per ton of price; The raw glycerine yield by 1.8%, 3000 yuan per ton of price, 260 yuan per ton of tooling cost, cottonseed per ton can rise in value about 100 yuan; But fully utilize, cotton cake dregs and intermediate are carried out deep processing, produce protein concentrate, phytic acid, cottonseed polyphenol and cottonseed polysaccharide and vitamin-E, sterol etc., profit is more than 500 yuan/ton, and its benefit is more obvious.If can form the throughput of producing 100000 tons of biofuel per year, will increase the effective supply of 100,000 tons of biofuel, alleviate petrifaction diesel situation in short supply to a certain extent, and can form the novel energy industry of 0.3 hundred million yuan of annual returns.
Venture analysis of the present invention:
There is very little risk in this invention, and its reason is: the one, and this project does not belong to explosion hazard production, has higher security; The 2nd, in producing process, there is not complicated chemical reaction, side reaction is less; The 3rd, the production of biofuel and grease processing have a lot of same or similar parts on technology and equipment; The 4th, petroleum resources exhaustion and the Oleum Gossypii semen resource can not reduce in the recent period day by day; The 5th, fatty acid methyl ester except that do fuel with, or important chemical intermediate-be mainly used in industries such as printing-ink, leather preparation and tensio-active agent.
(4) description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing.
Accompanying drawing is a process flow diagram of the present invention.
(5) embodiment
The method of this preparing biologic diesel oil from cottonseeds directly comprises the steps:
(1) with the even Feeding disc decorticator of clean cottonseed, tests, suitably regulate according to the result with 10 orders/inch screening.
(2) the last process product is sent into the twice screening trommel successively, regulate the main drive shaft rotating speed and carry out the benevolence shell to 260-280 rev/min and separate, reach and contain shell in the benevolence and be no more than 10%, contain benevolence in the shell and be no more than 0.5%.
(3) the isolated cottonseed benevolence of last process is sent into bulking machine, adjust its operating pressure to 8 MPa, indirect steam pressure is 1 MPa, according to the different open steams of regulating with the pan feeding temperature of output needs, guarantees that drop temperature is 95-100 ℃ and gets final product.
(4) the last process product is sent into flat rotary extractor, requiring the leacher temperature is 50-55 ℃, be 100-160 minute running period, charge amount is the 80-85% of material lattice, going into to soak the material temperature is 50-55 ℃, solvent is methyl alcohol and alcoholic acid mixed solution, mass ratio is 7: 3, wherein methyl alcohol, ethanol is technical grade, and fresh solvent adopts big spray mode, but must not overflow into draining stage, and the mixing oil liquid level is advisable to exceed charge level 30-50 millimeter, and solvent ratio is controlled at 1: 0.8-1.1, mixing oil massfraction are about 20-25%, the wet dregs of rice contain molten amount 15-25%, and the Residual oil of the butt dregs of rice is not more than 1%.
(5) with the wet dregs of rice and two kinds of product separate treatment of solvent hair cotton oil mixed solution of last process output:
5.1 the wet dregs of rice enter shwoot formula steam flow exsolution drying machine, requiring bed depth is 1.8-2.2 rice, speed of mainshaft 10-12 rev/min, open steam pressure 0.02-0.05 MPa, indirect steam pressure 0.4-0.5 MPa, gas phase temperature 75-80 ℃, steam 40-45 minute baking time, go out 105-110 ℃ of dregs of rice temperature, go out dregs of rice moisture 12-14%, residual molten 700 mg/kg that are not more than in the dregs of rice.Require solvent recuperation abundant simultaneously, dregs of rice slaking is normal, does not burntly stick with paste, and the output certified feed is with the dregs of rice or further process products such as output protein concentrate.
5.2 solvent hair cotton oil mixed solution enters 70-100 order/inch filter and removes and enter basin behind the particulates such as powder, chip and leave standstill, and further removes impurity by sedimentation.
Separate the solvent hair cotton oil mixed solution of 5.2 operations 5.3 use disk centrifuge, the impurity that obtains can further be processed into products such as phytic acid, polyphenol, polysaccharide, and free from foreign meter the mixed solution that contains methyl alcohol, ethanol, hair cotton oil that obtains is sent to next step continuation processing.
(6) mixed solution that 5.3 operations are obtained is sent into reactor and is heated to 60-70 ℃, add the vitriol oil of its quality 0.7-0.95% and the iron(ic) chloride of 0.01-0.2% then, keep temperature and at the uniform velocity stirring, speed is 60 rev/mins, stop insulation and stirring after 3 hours, leave standstill the mixed solution of emitting water and glycerine etc. after 2-3 hour and be further separated processing.
(7) mixed solution in the last process reactor is warming up to 60-70 ℃, the potassium hydroxide methanol solution that adds its quality 0.4-0.8%, keep temperature and at the uniform velocity stirring, speed is 60 rev/mins, stop insulation after 3 hours and stir, leave standstill the mixed solution of emitting aqueous glycerol etc. after 4 hours and be further separated processing.
(8) mixed solution in the last process reactor is warming up to 70-80 ℃, reclaims methyl alcohol and ethanol.
(9) mixed solution in the last process reactor is delivered to water washing tank, 70 ℃ the soft water that adds its quality 8-12% stirs, and speed is 60 rev/mins, leaves standstill after 30 minutes, emits waste water after 4 hours.This operation can repeat once as required.
(10) methyl esters vacuum successive drying still is kept 100-120 ℃ of temperature and 0.8-0.9 kPa of vacuum tightness, the mixed solution that adds in the last process reactor stirs, and speed is 60 rev/mins, leaves standstill cooling after 2-3 hour.
(11) be the biofuel finished product after the product filtration with last process.
The product quality indicator that reaches through the biofuel that aforesaid method generated:
China does not still have unified biofuel national standard at present, so with reference to German DIN51606:1997 biofuel standard.
The biofuel product quality indicator that reaches:
| Sequence number | Index name | CN | GM |
| 01 | Density in the time of 15 ℃ (g/ml) | min.0.880 max.0.900 | min.0.875 max.0.900 |
| 02 | Kinetic viscosity (mm in the time of 40 ℃ 2/s) | min.3.5 max.5.3 | min.3.5 max.5.0 |
| 03 | Flash-point P.M (℃) | min.112 | min.110 |
| 04 | Cold filter clogging temperature (℃) | max.-5 | max.-20 |
| 05 | Sulphur content (w, %) | max.0.01 | max.0.01 |
| 06 | Carbon residue (w, %) | max.0.08 | max.0.05 |
| 07 | Cetane value | min.46 | min.49 |
| 08 | Ash oontent (w, %) | max.0.05 | max.0.03 |
| 09 | Moisture content (mg/kg) | max.350 | max.300 |
| 10 | Total impurities content (mg/kg) | max.50 | max.20 |
| 11 | Neutralization value (mg KOH/g) | max.0.6 | max.0.5 |
| 12 | Methanol content (w, %) | max.0.4 | max.0.3 |
| 13 | Mono-glycerides (w, %) | max.0.8 | max.0.8 |
| 14 | Two sweet esters (w, %) | max.0.5 | max.0.4 |
| 15 | Triglyceride (w, %) | max.0.5 | max.0.4 |
| 15 | Free glycerol (w, %) | max.0.02 | max.0.02 |
| 16 | Total glycerine (w, %) | max.0.3 | max.0.25 |
| 17 | Iodine number (g iodine/100g) | max.115 | max.115 |
| 18 | Phosphorus content (mg/kg) | max.30 | max.10 |
| 19 | Alkali metal content (mg/kg) | max.20 | max.3 |
Annotate: CN represents the biofuel quality standard that the present invention reaches in the table; GM represents German DIN51606:1997 biofuel standard.
Claims (4)
1. the method for a preparing biologic diesel oil from cottonseeds directly, it is characterized in that: be raw material with the cottonseed, through peel off, give birth to embryo expanded after, adopting ethanol and methyl alcohol mixed liquor is that solvent leaches gossypol, hair cotton oil in leacher, obtains the wet dregs of rice of removing cotton phenol and solvent hair cotton oil mixed solution; Solvent hair cotton oil mixed solution can directly enter reaction kettle of the esterification, adds solid catalyst, and resultant of reaction is biofuel.
2. the method for preparing biologic diesel oil from cottonseeds directly according to claim 1, it is characterized in that: described leacher temperature is 50-55 ℃, and be 100-160 minute running period, and going into to soak the material temperature is 50-55 ℃, and solvent methanol and alcoholic acid mass ratio are 7: 3.
3. the method for preparing biologic diesel oil from cottonseeds directly according to claim 1 and 2 is characterized in that: with the dry ageing method of precipitation of shwoot formula steam flow exsolution drying, to the wet dregs of rice precipitation drying of removing cotton phenol, obtain the removing cotton phenol dregs of rice of slaking.
4. the method for preparing biologic diesel oil from cottonseeds directly according to claim 1, it is characterized in that: described solid catalyst is the iron(ic) chloride of 0.01-0.2%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104489259A (en) * | 2014-12-31 | 2015-04-08 | 石勇 | Method for preparing feed by cotton stalks |
-
2007
- 2007-05-09 CN CNA2007100155144A patent/CN101050374A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104489259A (en) * | 2014-12-31 | 2015-04-08 | 石勇 | Method for preparing feed by cotton stalks |
| CN104489259B (en) * | 2014-12-31 | 2017-06-30 | 新疆弘瑞达纤维有限公司 | A kind of method of cotton stalk Fodder making |
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