CN101935592A - Process for preparing biodiesel by using low-acid-value waste oil - Google Patents
Process for preparing biodiesel by using low-acid-value waste oil Download PDFInfo
- Publication number
- CN101935592A CN101935592A CN201010292594XA CN201010292594A CN101935592A CN 101935592 A CN101935592 A CN 101935592A CN 201010292594X A CN201010292594X A CN 201010292594XA CN 201010292594 A CN201010292594 A CN 201010292594A CN 101935592 A CN101935592 A CN 101935592A
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- China
- Prior art keywords
- biofuel
- acid number
- low acid
- oil plant
- discarded
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- 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.)
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- 239000002253 acid Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title abstract description 10
- 239000002699 waste material Substances 0.000 title abstract description 9
- 239000003225 biodiesel Substances 0.000 title abstract description 5
- 238000005886 esterification reaction Methods 0.000 claims abstract description 18
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 11
- 235000011187 glycerol Nutrition 0.000 claims abstract description 7
- 238000004062 sedimentation Methods 0.000 claims abstract description 7
- 239000002551 biofuel Substances 0.000 claims description 33
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 24
- 230000032050 esterification Effects 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 238000005809 transesterification reaction Methods 0.000 claims description 14
- 239000012043 crude product Substances 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 4
- 238000005119 centrifugation Methods 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 239000010408 film Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002283 diesel fuel Substances 0.000 abstract description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000018044 dehydration Effects 0.000 abstract 1
- 238000006297 dehydration reaction Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- 230000002194 synthesizing effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 28
- 239000008162 cooking oil Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000010775 animal oil Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006353 environmental stress Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 235000019387 fatty acid methyl ester Nutrition 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000000192 social effect Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Classifications
-
- 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
Landscapes
- Liquid Carbonaceous Fuels (AREA)
Abstract
The invention discloses a process for preparing biodiesel by using low-acid-value waste oil. The procedures of dehydration, pre-esterification reaction, esterification reaction, slurry sedimentation, glycerin separation, and the like are carried out on the collected low-acid-value waste oil by introducing a plug flow reactor to obtain the biodiesel. By collecting low-acid-value waste oil generated in daily life of people and converting and synthesizing the collected low-acid-value waste oil into the biodiesel, the invention realizes waste recycling effect and is helpful to relieving the current predicament of diesel fuel shortage and atmospheric pollution pressure for diesel fuel combustion at the same time.
Description
Technical field
The present invention relates to a kind of preparation technology of biofuel, refer in particular to and utilize the discarded oil plant of low acid number to prepare the technology of biofuel.
Background technology
Biofuel is meant utilizes vegetables oil, animal oil and methyl alcohol to carry out the fatty acid methyl ester that transesterify is produced, and is a kind of biofuel of cleaning, also is referred to as " regeneration fuel oil ".Under our times energy starved overall background, the R and D biofuel is tried to be the first to substitute diesel oil in countries in the world, has the reply energy dilemma, and reduces the great strategic importance of environmental stress, control air environmental pollution.In China, there are a lot of units producing or selling biofuel in the market, but because the confidence level of its technology, the difficulty of raw material sources, and the reasons such as lack of standard of marketing channel, biofuel is not all accepted by market always.
In addition, domestic, the waste cooking oil, the trench wet goods oil-bearing crops that produce every day and collect are huge, a part is the discarded oil plant of low acid number in these waste cooking oils, the sewer oil, how to utilize the discarded oil plant manufacturing of low acid number in these waste cooking oils, the sewer oil can be the high quality biologic diesel oil that the public accepted, become the technical barrier that this area needs to be resolved hurrily.In addition, prior biological diesel oil preparation technology, methyl alcohol loss in esterification reaction process is big, production cost is high, and existing processes esterification and transesterification all are to carry out in reactor, because the general time of esterification is longer, and the general time of transesterification process is shorter, therefore, cause the production process of whole biofuel can not be successive, had a strong impact on the production efficiency and the production cost of biofuel.
Summary of the invention
The objective of the invention is in order to overcome the shortcoming and defect that prior art exists, and provide a kind of discarded oil plant of low acid number that utilizes the discarded oil plant of low acid number to prepare biofuel to prepare the technology of biofuel.
For achieving the above object, technical scheme of the present invention is may further comprise the steps
(1) processed is carried out processed with the discarded oil plant of the low acid number of collecting, and makes its moisture mass ratio less than 0.1%;
(2) pre-esterification reactor, to discard oil plant and methyl alcohol and the vitriol oil through the low acid number of processed joins in the reaction kettle of the esterification, controlled temperature is a 55-75 ℃ of esterification of carrying out 0.4-0.6 hour, wherein, the mass ratio of the discarded oil plant of the low acid number after the processed is 6.7-20.3%, and the consumption of the described vitriol oil adds by the 0.8-1.2% mass ratio that accounts for the discarded oil plant of low acid number;
(3) sedimentation is carried out sedimentation with the mixture behind the pre-esterification reactor and is removed the water and the vitriol oil;
(4) transesterification, the KOH and the 13-17% methyl alcohol that the ester class that obtains are added 0.6-1.4% in mixing kettle mix, and be added in the plug flow reactor, the reaction flow of control piston flow reactor is 5 tons/hour, temperature of reaction is 35-95 ℃, carry out transesterification, obtain the biofuel crude product;
(5) glycerine separates, and the biofuel crude product behind the transesterification is gone out glycerine and obtains the biofuel work in-process by centrifugation;
(6) the biofuel crude product is obtained biofuel through the thin-film evaporator evaporation process.
Further be provided with is that described processed is that the discarded oil passing climbing-film evaporator of low acid number that will collect dewaters.
The invention has the advantages that: by collecting the discarded oil plant of low acid number that people are produced in living often, and its conversion synthesized biofuel, realize the effect of refuse reclamation, also help simultaneously to alleviate the quagmire of current diesel oil shortage and diesel combustion to the pressure of topsoil, have very high social effect and economic worth.
Simultaneously, transesterification in the production of biodiesel process is incorporated in the plug flow reactor carries out, because the reaction in the plug flow reactor is the fluidization reaction, no matter therefore whether the transesterification or the esterification of preorder are finished fully, the ester class that part is finished can be passed into and carry out transesterification in the plug flow reactor, make the production front and back of whole biofuel link up the production efficiency height.
Below in conjunction with embodiment the present invention is done further introduction.
Embodiment
Below by embodiment the present invention is carried out concrete description; only be used for the present invention is further specified; can not be interpreted as the qualification to protection domain of the present invention, the technician in this field can make some nonessential improvement and adjustment to the present invention according to the content of foregoing invention.
The discarded oil plant of the low acid number of collecting is obtained biofuel through following step.
(1) processed is carried out processed with the discarded oil plant of the low acid number of collecting, and makes its moisture mass ratio less than 0.1%; The described processed of this step is that the discarded oil passing climbing-film evaporator of low acid number that will collect dewaters.
(2) pre-esterification reactor, to discard oil plant and methyl alcohol and the vitriol oil through the low acid number of processed joins in the reaction kettle of the esterification, controlled temperature is a 55-75 ℃ of esterification of carrying out 0.4-0.6 hour, wherein, the mass ratio of the discarded oil plant of the low acid number after the processed is 6.7-20.3%, and the consumption of the described vitriol oil adds by the 0.8-1.2% mass ratio that accounts for the discarded oil plant of low acid number;
The reaction equation of this step is
(3) sedimentation is carried out sedimentation with the mixture behind the pre-esterification reactor and is removed the water and the vitriol oil;
(4) transesterification, the KOH and the 13-17% methyl alcohol that the ester class that obtains are added 0.6-1.4% in mixing kettle mix, and be added in the plug flow reactor, the reaction flow of control piston flow reactor is 5 tons/hour, temperature of reaction is 35-95 ℃, carry out transesterification, obtain the biofuel crude product; The reaction equation of this step is
(5) glycerine separates, and the biofuel crude product behind the transesterification is gone out glycerine and obtains the biofuel work in-process by centrifugation; This step preferably adopts in the disk centrifugal separator carries out.
(6) the biofuel crude product is obtained biofuel through the thin-film evaporator evaporation process.
Below by tabular form, list each embodiment under each process control condition of the present invention.
By the various embodiments described above, its product yield of prepared biofuel of the present invention is more than at least 83%, and the product acid number is lower than below 1.8.
Claims (2)
1. a low acid number is discarded the technology that oil plant prepares biofuel, it is characterized in that including following steps:
(1) processed is carried out processed with the discarded oil plant of the low acid number of collecting, and makes its moisture mass ratio less than 0.1%;
(2) pre-esterification reactor, to discard oil plant and methyl alcohol and the vitriol oil through the low acid number of processed joins in the reaction kettle of the esterification, controlled temperature is a 55-75 ℃ of esterification of carrying out 0.4-0.6 hour, wherein, the mass ratio of the discarded oil plant of the low acid number after the processed is 6.7-20.3%, and the consumption of the described vitriol oil adds by the 0.8-1.2% mass ratio that accounts for the discarded oil plant of low acid number;
Sedimentation is carried out sedimentation with the mixture behind the pre-esterification reactor and is removed the water and the vitriol oil;
Transesterification, the KOH and the 13-17% methyl alcohol that the ester class that obtains are added 0.6-1.4% in mixing kettle mix, and be added in the plug flow reactor, the reaction flow of control piston flow reactor is 5 tons/hour, temperature of reaction is 35-95 ℃, carry out transesterification, obtain the biofuel crude product;
Glycerine separates, and the biofuel crude product behind the transesterification is gone out glycerine and obtains the biofuel work in-process by centrifugation;
The biofuel crude product is obtained biofuel through the thin-film evaporator evaporation process.
2. the discarded oil plant of a kind of low acid number according to claim 1 prepares the technology of biofuel, it is characterized in that: described processed is that the discarded oil passing climbing-film evaporator of low acid number that will collect dewaters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010292594XA CN101935592A (en) | 2010-09-27 | 2010-09-27 | Process for preparing biodiesel by using low-acid-value waste oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010292594XA CN101935592A (en) | 2010-09-27 | 2010-09-27 | Process for preparing biodiesel by using low-acid-value waste oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101935592A true CN101935592A (en) | 2011-01-05 |
Family
ID=43389163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010292594XA Pending CN101935592A (en) | 2010-09-27 | 2010-09-27 | Process for preparing biodiesel by using low-acid-value waste oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101935592A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103173281A (en) * | 2011-12-21 | 2013-06-26 | 中国石油化工股份有限公司 | Method for reducing acid value of biodiesel crude product and preparation method of biodiesel |
| ES2438442A1 (en) * | 2012-07-11 | 2014-01-16 | Juan RODRIGUEZ GARCIA | Process of biodiesel production from vegetable oils obtained from such effect or from recycled frits (Machine-translation by Google Translate, not legally binding) |
| CN104232319A (en) * | 2014-10-08 | 2014-12-24 | 佛山市天晟隆油脂化工有限公司 | Vegetable oil spent bleaching clay recovery process |
| CN104232317A (en) * | 2014-10-08 | 2014-12-24 | 佛山市天晟隆油脂化工有限公司 | Vegetable oil spent bleaching clay recovery process |
| CN104232316A (en) * | 2014-10-08 | 2014-12-24 | 佛山市天晟隆油脂化工有限公司 | Vegetable oil spent bleaching clay recovery process |
| CN104403802A (en) * | 2014-10-08 | 2015-03-11 | 佛山市天晟隆油脂化工有限公司 | Plant oil waste white clay recovery technology |
| CN104450206A (en) * | 2014-10-08 | 2015-03-25 | 佛山市天晟隆油脂化工有限公司 | Process for recovering vegetable oil spent bleaching clay |
| CN104450205A (en) * | 2014-10-08 | 2015-03-25 | 佛山市天晟隆油脂化工有限公司 | Process for recovering vegetable oil spent bleaching clay |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1900223A (en) * | 2006-07-10 | 2007-01-24 | 中国科学院广州能源研究所 | Method for conitinuously producing biological diesel oil using solid acid catalyst and piston flow reactor |
| CN1986739A (en) * | 2006-12-20 | 2007-06-27 | 西北农林科技大学 | Process of preparing biodiesel oil with pricklyash seed oil in high acid value |
| CN101696372A (en) * | 2009-11-03 | 2010-04-21 | 合肥工业大学 | Method for preparing biodiesel by solid acid-base two-step method |
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2010
- 2010-09-27 CN CN201010292594XA patent/CN101935592A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1900223A (en) * | 2006-07-10 | 2007-01-24 | 中国科学院广州能源研究所 | Method for conitinuously producing biological diesel oil using solid acid catalyst and piston flow reactor |
| CN1986739A (en) * | 2006-12-20 | 2007-06-27 | 西北农林科技大学 | Process of preparing biodiesel oil with pricklyash seed oil in high acid value |
| CN101696372A (en) * | 2009-11-03 | 2010-04-21 | 合肥工业大学 | Method for preparing biodiesel by solid acid-base two-step method |
Non-Patent Citations (2)
| Title |
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| 《中国油脂》 20081231 张勇 利用地沟油制备生物柴油 48-50 1 第33卷, 第11期 2 * |
| 《可再生能源》 20070228 孟祥梅等 废油脂制取生物柴油的工艺优化及其品质提升 36-39 1 第25卷, 第1期 2 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103173281A (en) * | 2011-12-21 | 2013-06-26 | 中国石油化工股份有限公司 | Method for reducing acid value of biodiesel crude product and preparation method of biodiesel |
| CN103173281B (en) * | 2011-12-21 | 2014-12-31 | 中国石油化工股份有限公司 | Method for reducing acid value of biodiesel crude product and preparation method of biodiesel |
| ES2438442A1 (en) * | 2012-07-11 | 2014-01-16 | Juan RODRIGUEZ GARCIA | Process of biodiesel production from vegetable oils obtained from such effect or from recycled frits (Machine-translation by Google Translate, not legally binding) |
| CN104232319A (en) * | 2014-10-08 | 2014-12-24 | 佛山市天晟隆油脂化工有限公司 | Vegetable oil spent bleaching clay recovery process |
| CN104232317A (en) * | 2014-10-08 | 2014-12-24 | 佛山市天晟隆油脂化工有限公司 | Vegetable oil spent bleaching clay recovery process |
| CN104232316A (en) * | 2014-10-08 | 2014-12-24 | 佛山市天晟隆油脂化工有限公司 | Vegetable oil spent bleaching clay recovery process |
| CN104403802A (en) * | 2014-10-08 | 2015-03-11 | 佛山市天晟隆油脂化工有限公司 | Plant oil waste white clay recovery technology |
| CN104450206A (en) * | 2014-10-08 | 2015-03-25 | 佛山市天晟隆油脂化工有限公司 | Process for recovering vegetable oil spent bleaching clay |
| CN104450205A (en) * | 2014-10-08 | 2015-03-25 | 佛山市天晟隆油脂化工有限公司 | Process for recovering vegetable oil spent bleaching clay |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20110105 |