CN104479884A - Method for preparing diesel from illegal cooking oil - Google Patents
Method for preparing diesel from illegal cooking oil Download PDFInfo
- Publication number
- CN104479884A CN104479884A CN201410718228.4A CN201410718228A CN104479884A CN 104479884 A CN104479884 A CN 104479884A CN 201410718228 A CN201410718228 A CN 201410718228A CN 104479884 A CN104479884 A CN 104479884A
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- China
- Prior art keywords
- oil
- sewer oil
- sewer
- refining
- described step
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
- C11C3/00—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom
- C11C3/04—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom by esterification of fats or fatty oils
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/02—Liquid carbonaceous fuels essentially based on components consisting of carbon, hydrogen, and oxygen only
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/02—Refining fats or fatty oils by chemical reaction
- C11B3/04—Refining fats or fatty oils by chemical reaction with acids
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/10—Refining fats or fatty oils by adsorption
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/12—Refining fats or fatty oils by distillation
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
- C11C3/00—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom
- C11C3/04—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom by esterification of fats or fatty oils
- C11C3/10—Ester interchange
-
- 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
Abstract
The invention discloses a method for preparing diesel from illegal cooking oil, which comprises the following steps: pretreatment, refinement, pre-esterification treatment, ester exchange treatment, and refinement. The method effectively solves the problem of reutilization of illegal cooking oil, and prevents the lawbreakers from recovering and processing the illegal cooking oil into edible oil for selling. The illegal cooking oil is subjected to ester exchange treatment by using glycerol as an ester exchange agent, and subsequent refinement is performed to recover the glycerol; the recovered glycerol content is greater than 95%, and the recovery rate of glycerol is 90% above; and the recovered glycerol can be recovered as the ester exchange agent. The prepared diesel has favorable properties, especially has high flash point, and thus, is safe for production, storage and transportation; the method has the advantages of wide raw material sources, lower cost, simple preparation process, mild conditions and simple after-treatment process; the whole process does not generate any wastewater or waste gas, thereby maximally protecting the natural environment; and thus, the method has significant social value and favorable popularization value.
Description
Technical field
The present invention relates to chemical field, specifically a kind of sewer oil prepares the method for diesel oil.
Background technology
Sewer oil is people's general designations for all kinds of poor quality oil in life, generally comprises the waste grease etc. of hogwash fat, the generation of frying waste oil, food and relevant enterprise.Sewer oil is divided three classes: one is the sewer oil of narrow sense, by the greasy floating matter in water drain or the oil that the leftovers of hotel, restaurant, leftovers extracted through simple processing; Two is pork inferior, haslet, pigskin processing and the oil of output after refining; Three is after exceeding specified requirement for the oily access times of fried food product, then is recycled or toward the oil used after wherein adding some fresh oils.
All the time, China has the malignant event sewer oil through simple processing being flowed back to dining table every year.Sewer oil returns dining table has become a very thorny but ubiquitous food-safety problem, and one of long-standing major reason of this problem is exactly that sewer oil lacks reasonable outlet.Although the important chemical composition of sewer oil can make many available Chemicals, have purposes more widely, but experienced by very long discarded and collection process due to sewer oil, its composition becomes very complicated and uncertain, when making Chemicals, in most cases quality is difficult to ensure.
The domestic recycling of the disposal to sewer oil approach is more single at present, and mainly by preliminary working or simple deep processing, the product made has: stearic acid raw material, fodder additives, soap, mechanical workout oil, demoulding wet goods.Risen the industry utilizing sewer oil biofuel in recent years, but due to production cost higher, marketing channel is smooth in addition, makes most enterprise hard to carry on.
Summary of the invention
The object of the present invention is to provide a kind of sewer oil to prepare the method for diesel oil, stopped lawless person and sewer oil is reclaimed processing as food oil sale, brought harm to the health of people.
For achieving the above object, the invention provides following technical scheme:
Sewer oil prepares a method for diesel oil, comprises the following steps:
1) pre-treatment: first sewer oil is precipitated in settling tank, after removing impurity, again sewer oil is put into heating stirrer, to its stirring that fills oxygen while heating, until after temperature rises to 60 ~ 85 DEG C, insulation 0.5-2h, stops filling oxygen stirring, then sewer oil is lowered the temperature and discharge water removal of impurities and centrifuging process, obtain pretreated sewer oil;
2) refining: the 0.1-1%, the concentration that add its quality in pretreated sewer oil are the phosphoric acid of 75-85%, stir 18-25min at normal temperatures and pressures, filters and obtains the sewer oil that comes unstuck; Add the discoloring agent of the 1-5% of sewer oil quality of coming unstuck, stir 10-20min, obtain the sewer oil that decolours; Decolouring sewer oil is heated between 95-140 DEG C and removes moisture, until its biodiversity percentage composition lower than 0.1% time, obtain refining sewer oil;
3) pre-esterification process: use glycerine to carry out pre-esterification process as catalyzer to refining sewer oil as esterifying agent, the vitriol oil, the consumption of the vitriol oil is the 0.05-2% of refining trench oil quality, pre-esterification reactor temperature is 200-240 DEG C, and the pre-esterification reactor time is 1.5-4h;
4) ester interchange treatment: the ester exchange agent of the 0.8-1.5% adding its quality in the sewer oil of pre-esterification process is carried out transesterification reaction, transesterification reaction temperature is 50-75 DEG C, and the reaction times is 1.5-3h;
5) refining: under 60-90 DEG C of temperature ,-0.02-0.05MPa pressure, to carry out dealcoholysis; Then under 160-260 DEG C of temperature ,-0.05-0.07MPa pressure, carry out rectifying to the sewer oil of dealcoholysis, reclaim glycerine, remaining liquid phase is the diesel oil of preparation.
As the further scheme of the present invention: described step 2) in, discoloring agent is the one in atlapulgite, diatomite, silicon-dioxide, titanium dioxide.
As the further scheme of the present invention: described step 3) in, the consumption of the vitriol oil is 0.3% of refining trench oil quality.
As the further scheme of the present invention: described step 3) in, pre-esterification reactor temperature is 220-230 DEG C.
As the further scheme of the present invention: described step 3) in, the pre-esterification reactor time is 1.5-2h.
As the further scheme of the present invention: described step 3) in, the mol ratio of glycerine and the vitriol oil is 1.28.
As the further scheme of the present invention: described step 3) in, the vitriol oil is tetrabutyl titanate, a kind of in trifluoromethane sulfonic acid scandium, trifluoromethyl cerous iodate or candiyeast lipid acid is replaced.
As the further scheme of the present invention: described step 4) in, ester exchange agent is the one in sodium hydroxide, potassium hydroxide, sulfuric acid, sulfonic acid.
As the further scheme of the present invention: described step 5) in, glycerol content > 95% in the glycerine of recovery, yield of glycerin > 90%.
Compared with prior art, the invention has the beneficial effects as follows: the present invention efficiently solves the problem of sewer oil recycling, not only achieve the use value playing sewer oil to greatest extent, also stopped lawless person and sewer oil is reclaimed processing as food oil sale, brought harm to the health of people.The present invention carries out ester interchange treatment as ester exchange agent to sewer oil by glycerine, reclaim through follow-up refining step and obtain glycerine, reclaim the glycerol content obtained and be greater than 95%, compared with the glycerine needed for ester interchange treatment, the rate of recovery of glycerine reaches more than 90%, the glycerine that this recovery obtains can be reused by as ester exchange agent, has effectively saved resource.The various aspects of performance of diesel oil prepared by the present invention is better; especially diesel-fuel flash point is high; produce storing and transporting security, do not belong to inflammable explosive article, and raw material sources are extensive; cost is lower; preparation flow is simple, mild condition, and last handling process is simple, and whole flow process produces without waste water, waste gas; protect physical environment to greatest extent, there is great social value and good application and popularization value.
Embodiment
Below in conjunction with the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In the embodiment of the present invention, a kind of sewer oil prepares the method for diesel oil, comprises the following steps:
1) pre-treatment: first sewer oil is precipitated in settling tank, after removing impurity, again sewer oil is put into heating stirrer, to its stirring that fills oxygen while heating, until after temperature rises to 60 ~ 85 DEG C, insulation 0.5-2h, stops filling oxygen stirring, then sewer oil is lowered the temperature and discharge water removal of impurities and centrifuging process, obtain pretreated sewer oil;
2) refining: the 0.1-1%, the concentration that add its quality in pretreated sewer oil are the phosphoric acid of 75-85%, stir 18-25min at normal temperatures and pressures, filters and obtains the sewer oil that comes unstuck; Add the discoloring agent of the 1-5% of sewer oil quality of coming unstuck, stir 10-20min, obtain the sewer oil that decolours; Decolouring sewer oil is heated between 95-140 DEG C and removes moisture, until its biodiversity percentage composition lower than 0.1% time, obtain refining sewer oil;
3) pre-esterification process: use glycerine to carry out pre-esterification process as catalyzer to refining sewer oil as esterifying agent, the vitriol oil, the consumption of the vitriol oil is the 0.05-2% of refining trench oil quality, pre-esterification reactor temperature is 200-240 DEG C, and the pre-esterification reactor time is 1.5-4h;
4) ester interchange treatment: the ester exchange agent of the 0.8-1.5% adding its quality in the sewer oil of pre-esterification process is carried out transesterification reaction, transesterification reaction temperature is 50-75 DEG C, and the reaction times is 1.5-3h;
5) refining: under 60-90 DEG C of temperature ,-0.02-0.05MPa pressure, to carry out dealcoholysis; Then under 160-260 DEG C of temperature ,-0.05-0.07MPa pressure, carry out rectifying to the sewer oil of dealcoholysis, reclaim glycerine, remaining liquid phase is the diesel oil of preparation.
Described step 2) in, discoloring agent is the one in atlapulgite, diatomite, silicon-dioxide, titanium dioxide.
Described step 3) in, the consumption of the vitriol oil is 0.3% of refining trench oil quality.
Described step 3) in, pre-esterification reactor temperature is 220-230 DEG C.
Described step 3) in, the pre-esterification reactor time is 1.5-2h.
Described step 3) in, the mol ratio of glycerine and the vitriol oil is 1.28.
Described step 3) in, the vitriol oil is tetrabutyl titanate, a kind of in trifluoromethane sulfonic acid scandium, trifluoromethyl cerous iodate or candiyeast lipid acid is replaced.
Described step 4) in, ester exchange agent is the one in sodium hydroxide, potassium hydroxide, sulfuric acid, sulfonic acid.
Described step 5) in, glycerol content > 95% in the glycerine of recovery, yield of glycerin > 90%.
Embodiment 1
In the embodiment of the present invention, a kind of sewer oil prepares the method for diesel oil, comprises the following steps:
1) pre-treatment: first sewer oil is precipitated in settling tank, after removing impurity, again sewer oil is put into heating stirrer, to its stirring that fills oxygen while heating, until after temperature rises to 85 DEG C, insulation 0.5h, stops filling oxygen stirring, then sewer oil is lowered the temperature and discharge water removal of impurities and centrifuging process, obtain pretreated sewer oil;
2) refining: add 0.2% of its quality in pretreated sewer oil, concentration is the phosphoric acid of 85%, stir 20min at normal temperatures and pressures, filter and obtain the sewer oil that comes unstuck; Add the discoloring agent of 1% of sewer oil quality of coming unstuck, stir 20min, obtain the sewer oil that decolours; Decolouring sewer oil is heated to 95-140 DEG C and removes moisture, until its biodiversity percentage composition lower than 0.1% time, obtain refining sewer oil;
3) pre-esterification process: use glycerine to carry out pre-esterification process as catalyzer to refining sewer oil as esterifying agent, the vitriol oil, the consumption of the vitriol oil is 0.2% of refining trench oil quality, and pre-esterification reactor temperature is 240 DEG C, and the pre-esterification reactor time is 4h;
4) ester interchange treatment: the sulfonic acid of add its quality in the sewer oil of pre-esterification process 1.5% is carried out transesterification reaction, transesterification reaction temperature is 60 DEG C, and the reaction times is 2h;
5) refining: under 60-90 DEG C of temperature ,-0.02-0.05MPa pressure, to carry out dealcoholysis; Then under 160-260 DEG C of temperature ,-0.05-0.07MPa pressure, carry out rectifying to the sewer oil of dealcoholysis, reclaim glycerine, remaining liquid phase is the diesel oil of preparation.
Embodiment 2
Sewer oil prepares a method for diesel oil, comprises the following steps:
1) pre-treatment: first sewer oil is precipitated in settling tank, after removing impurity, again sewer oil is put into heating stirrer, to its stirring that fills oxygen while heating, until after temperature rises to 75 DEG C, insulation 1.2h, stops filling oxygen stirring, then sewer oil is lowered the temperature and discharge water removal of impurities and centrifuging process, obtain pretreated sewer oil;
2) refining: add 0.5% of its quality in pretreated sewer oil, concentration is the phosphoric acid of 75%, stir 18min at normal temperatures and pressures, filter and obtain the sewer oil that comes unstuck; Add the discoloring agent of 3% of sewer oil quality of coming unstuck, stir 10min, obtain the sewer oil that decolours; Decolouring sewer oil is heated between 95-140 DEG C and removes moisture, until its biodiversity percentage composition lower than 0.1% time, obtain refining sewer oil;
3) pre-esterification process: use glycerine to carry out pre-esterification process as catalyzer to refining sewer oil as esterifying agent, tetrabutyl titanate, the consumption of tetrabutyl titanate is 0.5% of refining trench oil quality, pre-esterification reactor temperature is 220 DEG C, and the pre-esterification reactor time is 2.5h;
4) ester interchange treatment: the potassium hydroxide of add its quality in the sewer oil of pre-esterification process 1.2% is carried out transesterification reaction, transesterification reaction temperature is 75 DEG C, and the reaction times is 2h;
5) refining: under 60-90 DEG C of temperature ,-0.02-0.05MPa pressure, to carry out dealcoholysis; Then under 160-260 DEG C of temperature ,-0.05-0.07MPa pressure, carry out rectifying to the sewer oil of dealcoholysis, reclaim glycerine, remaining liquid phase is the diesel oil of preparation.
Embodiment 3
Sewer oil prepares a method for diesel oil, comprises the following steps:
1) pre-treatment: first sewer oil is precipitated in settling tank, after removing impurity, again sewer oil is put into heating stirrer, to its stirring that fills oxygen while heating, until after temperature rises to 60 DEG C, insulation 2h, stops filling oxygen stirring, then sewer oil is lowered the temperature and discharge water removal of impurities and centrifuging process, obtain pretreated sewer oil;
2) refining: add 1% of its quality in pretreated sewer oil, concentration is the phosphoric acid of 75%, stir 18min at normal temperatures and pressures, filter and obtain the sewer oil that comes unstuck; Add the discoloring agent of 5% of sewer oil quality of coming unstuck, stir 10min, obtain the sewer oil that decolours; Decolouring sewer oil is heated between 95-140 DEG C and removes moisture, until its biodiversity percentage composition lower than 0.1% time, obtain refining sewer oil;
3) pre-esterification process: use glycerine to carry out pre-esterification process as catalyzer to refining sewer oil as esterifying agent, candiyeast lipid acid, the consumption of candiyeast lipid acid is 1.2% of refining trench oil quality, pre-esterification reactor temperature is 200 DEG C, and the pre-esterification reactor time is 1.5h;
4) ester interchange treatment: the sodium hydroxide of add its quality in the sewer oil of pre-esterification process 1.5% is carried out transesterification reaction, transesterification reaction temperature is 75 DEG C, and the reaction times is 3h;
5) refining: under 60-90 DEG C of temperature ,-0.02-0.05MPa pressure, to carry out dealcoholysis; Then under 160-260 DEG C of temperature ,-0.05-0.07MPa pressure, carry out rectifying to the sewer oil of dealcoholysis, reclaim glycerine, remaining liquid phase is the diesel oil of preparation.
Detected by the salient features of the diesel oil prepared above embodiment, detected result is as following table: as seen from table, and the properties of diesel oil prepared by the present invention is all better, and especially flash-point is high, and therefore the aspect such as storages, transportation safety does not need worry.
| Performance title | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Density (kg/m 3) | 861 | 883 | 854 |
| Viscosity (mm 2/s) | 5.12 | 5.36 | 5.29 |
| Close flash point (DEG C) | 138 | 153 | 143 |
| Colourity (number) | 5.4 | 3.6 | 4.7 |
| The combustion heat (MJ/kg) | 47.5 | 50.8 | 46.9 |
| Free glycerol mass fraction (%) | ≤0.02 | ≤0.016 | ≤0.018 |
| Cetane value | 59 | 66 | 62 |
| 10% steams excess carbon residue mass fraction (%) | ≤0.29 | ≤0.24 | ≤0.28 |
The present invention efficiently solves the problem of sewer oil recycling, not only achieves the use value playing sewer oil to greatest extent, has also stopped lawless person and sewer oil is reclaimed processing as food oil sale, brought harm to the health of people.The present invention carries out ester interchange treatment as ester exchange agent to sewer oil by glycerine, reclaim through follow-up refining step and obtain glycerine, reclaim the glycerol content obtained and be greater than 95%, compared with the glycerine needed for ester interchange treatment, the rate of recovery of glycerine reaches more than 90%, the glycerine that this recovery obtains can be reused by as ester exchange agent, has effectively saved resource.The various aspects of performance of diesel oil prepared by the present invention is better; especially diesel-fuel flash point is high; produce storing and transporting security, do not belong to inflammable explosive article, and raw material sources are extensive; cost is lower; preparation flow is simple, mild condition, and last handling process is simple, and whole flow process produces without waste water, waste gas; protect physical environment to greatest extent, there is great social value and good application and popularization value.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.
In addition, be to be understood that, although this specification sheets is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of specification sheets is only for clarity sake, those skilled in the art should by specification sheets integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (9)
1. sewer oil prepares a method for diesel oil, it is characterized in that, comprises the following steps:
1) pre-treatment: first sewer oil is precipitated in settling tank, after removing impurity, again sewer oil is put into heating stirrer, to its stirring that fills oxygen while heating, until after temperature rises to 60 ~ 85 DEG C, insulation 0.5-2h, stops filling oxygen stirring, then sewer oil is lowered the temperature and discharge water removal of impurities and centrifuging process, obtain pretreated sewer oil;
2) refining: the 0.1-1%, the concentration that add its quality in pretreated sewer oil are the phosphoric acid of 75-85%, stir 18-25min at normal temperatures and pressures, filters and obtains the sewer oil that comes unstuck; Add the discoloring agent of the 1-5% of sewer oil quality of coming unstuck, stir 10-20min, obtain the sewer oil that decolours; Decolouring sewer oil is heated between 95-140 DEG C and removes moisture, until its biodiversity percentage composition lower than 0.1% time, obtain refining sewer oil;
3) pre-esterification process: use glycerine to carry out pre-esterification process as catalyzer to refining sewer oil as esterifying agent, the vitriol oil, the consumption of the vitriol oil is the 0.05-2% of refining trench oil quality, pre-esterification reactor temperature is 200-240 DEG C, and the pre-esterification reactor time is 1.5-4h;
4) ester interchange treatment: the ester exchange agent of the 0.8-1.5% adding its quality in the sewer oil of pre-esterification process is carried out transesterification reaction, transesterification reaction temperature is 50-75 DEG C, and the reaction times is 1.5-3h;
5) refining: under 60-90 DEG C of temperature ,-0.02-0.05MPa pressure, to carry out dealcoholysis; Then under 160-260 DEG C of temperature ,-0.05-0.07MPa pressure, carry out rectifying to the sewer oil of dealcoholysis, reclaim glycerine, remaining liquid phase is the diesel oil of preparation.
2. sewer oil according to claim 1 prepares the method for diesel oil, it is characterized in that, described step 2) in, discoloring agent is the one in atlapulgite, diatomite, silicon-dioxide, titanium dioxide.
3. sewer oil according to claim 1 prepares the method for diesel oil, it is characterized in that, described step 3) in, the consumption of the vitriol oil is 0.3% of refining trench oil quality.
4. sewer oil according to claim 1 prepares the method for diesel oil, it is characterized in that, described step 3) in, pre-esterification reactor temperature is 220-230 DEG C.
5. sewer oil according to claim 1 prepares the method for diesel oil, it is characterized in that, described step 3) in, the pre-esterification reactor time is 1.5-2h.
6. sewer oil according to claim 1 prepares the method for diesel oil, it is characterized in that, described step 3) in, the mol ratio of glycerine and the vitriol oil is 1.28.
7. prepare the method for diesel oil according to the arbitrary described sewer oil of claim 1 and 6, it is characterized in that, described step 3) in, the vitriol oil is tetrabutyl titanate, a kind of in trifluoromethane sulfonic acid scandium, trifluoromethyl cerous iodate or candiyeast lipid acid is replaced.
8. sewer oil according to claim 1 prepares the method for diesel oil, it is characterized in that, described step 4) in, ester exchange agent is the one in sodium hydroxide, potassium hydroxide, sulfuric acid, sulfonic acid.
9. sewer oil according to claim 1 prepares the method for diesel oil, it is characterized in that, described step 5) in, glycerol content > 95% in the glycerine of recovery, yield of glycerin > 90%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410718228.4A CN104479884A (en) | 2014-12-01 | 2014-12-01 | Method for preparing diesel from illegal cooking oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410718228.4A CN104479884A (en) | 2014-12-01 | 2014-12-01 | Method for preparing diesel from illegal cooking oil |
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| Publication Number | Publication Date |
|---|---|
| CN104479884A true CN104479884A (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410718228.4A Withdrawn CN104479884A (en) | 2014-12-01 | 2014-12-01 | Method for preparing diesel from illegal cooking oil |
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| CN (1) | CN104479884A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245377A (en) * | 2017-07-31 | 2017-10-13 | 安庆华威油脂科技有限公司 | A kind of trench oil recovery method |
| CN107418726A (en) * | 2017-07-31 | 2017-12-01 | 安庆华威油脂科技有限公司 | A kind of process for purification for reclaiming gutter oil |
-
2014
- 2014-12-01 CN CN201410718228.4A patent/CN104479884A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245377A (en) * | 2017-07-31 | 2017-10-13 | 安庆华威油脂科技有限公司 | A kind of trench oil recovery method |
| CN107418726A (en) * | 2017-07-31 | 2017-12-01 | 安庆华威油脂科技有限公司 | A kind of process for purification for reclaiming gutter oil |
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Application publication date: 20150401 |