CN106699514A - Method for purifying biodiesel byproduct crude glycerol - Google Patents
Method for purifying biodiesel byproduct crude glycerol Download PDFInfo
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- CN106699514A CN106699514A CN201611094652.1A CN201611094652A CN106699514A CN 106699514 A CN106699514 A CN 106699514A CN 201611094652 A CN201611094652 A CN 201611094652A CN 106699514 A CN106699514 A CN 106699514A
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- crude glycerine
- ceramic membrane
- diesel oil
- film
- glycerine
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- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 title claims abstract description 195
- 239000006227 byproduct Substances 0.000 title claims abstract description 28
- 239000003225 biodiesel Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title abstract description 31
- 239000012528 membrane Substances 0.000 claims abstract description 41
- 239000000919 ceramic Substances 0.000 claims abstract description 38
- 238000000926 separation method Methods 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 235000011187 glycerol Nutrition 0.000 claims description 87
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 33
- 239000002283 diesel fuel Substances 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 19
- 238000000746 purification Methods 0.000 claims description 19
- -1 iron ion Chemical class 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 11
- 238000002834 transmittance Methods 0.000 claims description 11
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 239000000049 pigment Substances 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000008929 regeneration Effects 0.000 abstract 1
- 238000011069 regeneration method Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000004821 distillation Methods 0.000 description 5
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 5
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 5
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 4
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 4
- 235000009508 confectionery Nutrition 0.000 description 4
- RXKJFZQQPQGTFL-UHFFFAOYSA-N dihydroxyacetone Chemical compound OCC(=O)CO RXKJFZQQPQGTFL-UHFFFAOYSA-N 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- 101100412856 Mus musculus Rhod gene Proteins 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229940120503 dihydroxyacetone Drugs 0.000 description 2
- 239000003456 ion exchange resin Substances 0.000 description 2
- 229920003303 ion-exchange polymer Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- ZGSOBQAJAUGRBK-UHFFFAOYSA-N propan-2-olate;zirconium(4+) Chemical compound [Zr+4].CC(C)[O-].CC(C)[O-].CC(C)[O-].CC(C)[O-] ZGSOBQAJAUGRBK-UHFFFAOYSA-N 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- KXCPAUWIRBMTET-SOFGYWHQSA-N (6e)-8-methyl-5-propan-2-ylnona-6,8-dien-2-ol Chemical compound CC(O)CCC(C(C)C)\C=C\C(C)=C KXCPAUWIRBMTET-SOFGYWHQSA-N 0.000 description 1
- OVSKIKFHRZPJSS-UHFFFAOYSA-N 2,4-D Chemical compound OC(=O)COC1=CC=C(Cl)C=C1Cl OVSKIKFHRZPJSS-UHFFFAOYSA-N 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 229910003158 γ-Al2O3 Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to a method for purifying crude glycerol, in particular to a method for purifying biodiesel byproduct crude glycerol, belonging to the technical field of chemistry. The invention adopts a membrane separation technology, in particular to a ceramic membrane separation technology to purify the biodiesel byproduct crude glycerol to remove impurities in the crude glycerol, and has the advantages that: the separation efficiency is high, the effect is good, compared with the prior art, the process flow is saved, the production cost is saved, the labor input is saved, and the ceramic membrane has the advantages of stable physicochemical property, easy regeneration, long service life and the like.
Description
Technical field
The present invention relates to a kind of purification process of crude glycerine, more particularly to a kind of purifying of biological diesel oil byproduct crude glycerine
Method, belongs to technical field of chemistry.
Background technology
Biodiesel refers to the fatty acid ester of short chain unitary alkanol.Biodiesel is the aliphatic acid from animal and plant fat
Methyl esters.The power of biodiesel, efficiency, towing force and climbing capacity are suitable with ordinary diesel oil, and both other performances are also close, and such as ten
Six alkane values, viscosity, the combustion heat, pour point etc..The characteristics of biodiesel has environment-friendly, be embodied in production, combustion process it is each
Individual aspect.The production of biodiesel can reduce the exploitation and consumption of fossil energy, the CO of its burning and exhausting2Far below plant growth
The CO that process absorbs2, in can be alleviate because of CO2The global warming that accumulation is caused；Biodiesel sulfur content is low, can make two
The discharge of sulfur oxide and sulfide reduces about 30%, and without the aromatic hydrocarbon of environmental pollution is caused, its waste gas discharge can meet Europe
The discharge standard of continent II, III.
Biodiesel shows that it has vast potential for future development in the advantage that all many-sides are showed.But, just at present
For having been put into the method for producing biodiesel of production, due to production technology defect in itself, the pretreatment of raw materials for production, life
The problems such as separate, purify and recycle cause biodiesel between biodiesel that output is come and its accessory substance
Production cost remains high；The abundance of raw materials for production and the stability of quality are that restriction biodiesel realizes extensive work
Industry factor of production, these problems all constrain the development of production of biodiesel industry.With the scarcity of traditional fossil resources,
The comprehensive utilization ratio for improving biodiesel product turns into an effective way for solving present problems.
9kg biodiesel is often produced, the glycerin by-products of 1kg are about obtained.Current China biodiesel scope of the enterprise is small,
By-product glycerin majority is resell to refinery, and it is common glycerine or medical glycerine to refine, and deep processing and utilization is not carried out.It is pure
Glycerine be a kind of colourless pleasantly sweet thick liquid, be important industrial chemicals.Glycerine can be used as GC stationary liquid,
Can be used as solvent, gas gauge and hydraulic press shock absorber fluid, softening agent, antibiotic fermentation nutritional agents, drier etc., after refining not only
Can be used as medical, moreover it is possible to prepare the organic intermediates such as 1,3-PD, dihydroxyacetone (DHA), in Polymer Synthesizing (such as cosmetics,
Resin etc.) there is important application.China's glycerine is constantly in the situation that supply falls short of demand, especially high-purity glycerol (99.5%)
Almost all relies on import.The application number that such as applicant retrieves：200810210495.5, applicant：Rhom and Hass,
Applying date 2008.8.14, title " method purified to the glycerine from production of biodiesel ", disclose crude glycerine and
Acid mixing, the method that reprocessing glycerin layer is purified.Applicant：Rhodia Poliamida E. Especialida, application number：
200980122493.3 applyings date：2009-05-18, title " method of purifying crude glycerol " is disclosed crude glycerine and ketone and aldehyde
The specific organic compound reaction of type, the method for being purified.Below it is the purification process carried out by chemical reaction, lacks
Point is to add substantial amounts of chemical reagent to be chemically reacted, and the chemical reagent of introducing causes PROCESS FOR TREATMENT complicated, chemical reaction
Accessory substance is more intractable etc..Applicant further retrieves applicant：Rhom and Hass, application number：200710300523.8
The applying date：2007-12-20, title " method of purification of glycerol " discloses a kind of without chemical reaction, acid using gel-type
The method of ion-exchange resin bead grain fractionation of fatty hydrochlorate and inorganic salts from crude glycerine.Applicant：Healthy and free from worry plastic cement section of Tianzhang City
Skill Co., Ltd, application number：201410136925.9 applyings date：2014-04-04, a kind of title " the purifying production work of glycerine
Skill ", disclosing the step of being condensed by many redistillations to crude glycerine filter the method for being purified, and above-mentioned this kind of method is not
Needs carry out purification of glycerol by chemical reaction, have the disadvantage that ion exchange resin short life, many redistillations condensation power consumption are big, and this leads
Cause above-mentioned process economy not strong.Therefore, while biodiesel is developed, coproduction its high added value product high-purity glycerol,
The comprehensive utilization ratio and economy of product in production biodiesel process can be not only improved, and coming for glycerine can be increased
Source, alleviates the short supply state of China's glycerol market.
The content of the invention
The purpose of the present invention is directed to the defect of prior art presence, proposes a kind of the pure of biological diesel oil byproduct crude glycerine
Change method, simple to operate, energy consumption is low, and equipment requirement is low, and product purity is high.
The present invention solves technical problem by the following technical programs：A kind of purifying side of biological diesel oil byproduct crude glycerine
Method, comprises the following steps：
Step one, prepare ceramic membrane for purifying biological biodiesel by-product crude glycerine；
Step 2, biological diesel oil byproduct crude glycerine is processed using the separator containing the ceramic membrane, obtained
Film trapped fluid to the film penetrating fluid for removing impurity in crude glycerine and containing impurity in crude glycerine；
Step 3, the film trapped fluid is entered back into ceramic membrane separation device purifying obtain film penetrating fluid；
Step 4, by film penetrating fluid after purification by sample pH measure, the measure of methanol content, pigment absorption ripple
Measure, the measure of iron ion content of long and light transmittance, directly as the next step raw material of industry after meeting the requirements.
In the step one of above method, the molecular cut off of prepared ceramic membrane is 200-5000Da, ceramic membrane
Material be at least one in aluminum oxide, titanium oxide and zirconium oxide.
In the step 2, the membrane module of ceramic membrane separation device is hollow-fibre membrane, board-like film, rolled film and tubular membrane
In one kind.
The operation temperature of the ceramic membrane separation device is 65-95 DEG C；Operating pressure 2-20bar；Crossflow velocity is in 1-6m/
s。
It is biological diesel oil byproduct crude glycerine, pH value 3-11, methanol content into the material liquid before ceramic membrane separation device
10-20%, light transmittance 1-10%, iron ion content 40-100mg/L.
In the step 4, the pH value 3-11 of film penetrating fluid after purification, methanol content 0.5%-1%, light transmittance 60%-
90%, iron ion content is in 5%-10%.
The use membrane separation technique of novelty of the present invention, specifically Ceramic Membranes Separating Technique is thick to biological diesel oil byproduct
Glycerine carries out purification process, removes the impurity in crude glycerine, and beneficial effect is：Separative efficiency is high, effect is good, than existing process section
Save technological process, saving production cost, save human input, and ceramic membrane has the physicochemical property of stabilization, easily regenerates, uses the longevity
The advantages of ordering long.
Specific embodiment
A kind of ceramic membrane purifying process of biological diesel oil byproduct crude glycerine, it is included：1st, prepare for purifying biological bavin
The ceramic membrane of oily accessory substance crude glycerine；2nd, it is slightly sweet to biological diesel oil byproduct using described ceramic membrane and ceramic membrane separation device
Oil is processed, and removes the impurity in crude glycerine；3rd, it is pure that the crude glycerine film trapped fluid after processing enters back into ceramic membrane separation device
Change；4th, by ceramic membrane film penetrating fluid (refined glycerine) after purification directly as the next step raw material of industry；5th, examined using pH meter
Survey the pH value of crude glycerine and refined glycerine；6th, the methanol content of crude glycerine and refined glycerine is determined using the way of distillation；7th, make
The maximum absorption wavelength of pigment in the glycerine is determined with ultraviolet-visible spectrophotometer, at this wavelength determine crude glycerine with
And the light transmittance of refined glycerine；8th, the iron ion in crude glycerine and refined glycerine is determined using micro-wave digestion-ICP-MS methods to contain
Amount.
Embodiment 1
By zirconium iso-propoxide, isopropanol and acetylacetone,2,4-pentanedione in molar ratio 1:25:1.3 ratio is mixed and stirred for, and is placed in ice
In bath；It is 5 to be added thereto to again with zirconium iso-propoxide mol ratio：1 deionized water, is mixed and stirred for；Most this solution is placed at last
Temperature is to carry out reaction 5h in 60 DEG C of water bath with thermostatic control, obtains the ZrO of appearance transparent2Polymerization colloidal sol.
By above-mentioned colloidal sol and isopropanol by volume 1:6 dilution proportion is configured to preparation liquid, by preparation liquid in γ-Al2O3
Carrier surface film.
The carrier drying of preparation liquid will be coated, be warming up to Temperature fall after 450 DEG C of inside holding 5h, be obtained for biodiesel
The ceramic membrane of the ceramic membrane purifying process of accessory substance crude glycerine.
Biological diesel oil byproduct crude glycerine is taken, detects that crude glycerine pH value is 3.8, determines thick sweet using the way of distillation using pH meter
Oily methanol content is 18.9%, the maximum absorption wavelength of pigment in glycerine is determined using ultraviolet-visible spectrophotometer, in this ripple
The lower light transmittance for determining crude glycerine long is 6%, is using iron ion content in micro-wave digestion-ICP-MS methods measure crude glycerine
86mg/L；Use 1000Da, the zirconia ceramics film of 61 passage tubular types and ceramic film device opposite thing biodiesel by-product crude glycerine
Processed, the operation temperature of ceramic film device is 90 DEG C, operating pressure is that 15bar, crossflow velocity are 4m/s, removes crude glycerine
In impurity；Crude glycerine film trapped fluid after treatment enters back into ceramic membrane separation device purifying；By ceramic membrane film after purification
Penetrating fluid (refined glycerine) detects that the pH value of refined glycerine is 3.8, the methyl alcohol of refined glycerine is determined using the way of distillation using pH meter
Content is 0.8%, the maximum absorption wavelength of pigment in glycerine is determined using ultraviolet-visible spectrophotometer, surveyed at this wavelength
It is 8mg/ to determine iron ion content during the light transmittance of refined glycerine determines refined glycerine for 83%, using micro-wave digestion-ICP-MS methods
L, can be used as the next step raw material of industry.
Embodiment 2
The method that ceramic membrane is prepared in the present embodiment is same as Example 1, repeats no more.
Biological diesel oil byproduct crude glycerine is taken, detects that crude glycerine pH value is 7.5, determines thick sweet using the way of distillation using pH meter
Oily methanol content is 15.3%, the maximum absorption wavelength of pigment in glycerine is determined using ultraviolet-visible spectrophotometer, in this ripple
The lower light transmittance for determining crude glycerine long is 8%, is using iron ion content in micro-wave digestion-ICP-MS methods measure crude glycerine
73mg/L；Use 3000Da, the titanium oxide ceramics film of 37 passage tubular types and ceramic film device opposite thing biodiesel by-product crude glycerine
Processed, the operation temperature of ceramic film device is 85 DEG C, operating pressure is that 10bar, crossflow velocity are 5m/s, removes crude glycerine
In impurity；Crude glycerine film trapped fluid after treatment enters back into ceramic membrane separation device purifying；By ceramic membrane film after purification
Penetrating fluid (refined glycerine) detects that the pH value of refined glycerine is 7.5, the methyl alcohol of refined glycerine is determined using the way of distillation using pH meter
Content is 0.9%, the maximum absorption wavelength of pigment in glycerine is determined using ultraviolet-visible spectrophotometer, surveyed at this wavelength
It is 10mg/ to determine iron ion content during the light transmittance of refined glycerine determines refined glycerine for 67%, using micro-wave digestion-ICP-MS methods
L, can be used as the next step raw material of industry.
In addition to above-mentioned implementation, the present invention can also have other embodiment.All use equivalents or equivalent transformation are formed
Technical scheme, all fall within the protection domain of application claims.
Claims (6)
1. a kind of purification process of biological diesel oil byproduct crude glycerine, comprises the following steps：
Step one, prepare ceramic membrane for purifying biological biodiesel by-product crude glycerine；
Step 2, biological diesel oil byproduct crude glycerine is processed using the separator containing the ceramic membrane, removed
Remove the film penetrating fluid and the film trapped fluid containing impurity in crude glycerine of impurity in crude glycerine；
Step 3, the film trapped fluid is entered back into ceramic membrane separation device purifying obtain film penetrating fluid；
Step 4, by film penetrating fluid after purification by the measure of sample pH, the measure of methanol content, pigment absorption wavelength with
And measure, the measure of iron ion content of light transmittance, directly as the next step raw material of industry after meeting the requirements.
2. the purification process of biological diesel oil byproduct crude glycerine according to claim 1, it is characterised in that：The step one
In, the molecular cut off of the ceramic membrane of preparation is 200-5000Da, and the material of ceramic membrane is in aluminum oxide, titanium oxide and zirconium oxide
At least one.
3. the purification process of biological diesel oil byproduct crude glycerine according to claim 1, it is characterised in that：The second step
In, the membrane module of ceramic membrane separation device is the one kind in hollow-fibre membrane, board-like film, rolled film and tubular membrane.
4. the purification process of biological diesel oil byproduct crude glycerine according to claim 3, it is characterised in that：The ceramic membrane point
It it is 65-95 DEG C from the operation temperature of device；Operating pressure 2-20bar；Crossflow velocity is in 1-6m/s.
5. the purification process of biological diesel oil byproduct crude glycerine according to claim 1, it is characterised in that：Into ceramic membrane point
Material liquid before device is biological diesel oil byproduct crude glycerine, pH value 3-11, methanol content 10-20%, light transmittance 1-10%,
Iron ion content 40-100mg/L.
6. the purification process of biological diesel oil byproduct crude glycerine according to claim 1, it is characterised in that：The step 3
In, the pH value 3-11 of film penetrating fluid after purification, methanol content 0.5%-1%, light transmittance 60%-90%, iron ion content exists
5%-10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611094652.1A CN106699514A (en) | 2016-12-02 | 2016-12-02 | Method for purifying biodiesel byproduct crude glycerol |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611094652.1A CN106699514A (en) | 2016-12-02 | 2016-12-02 | Method for purifying biodiesel byproduct crude glycerol |
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| CN106699514A true CN106699514A (en) | 2017-05-24 |
Family
ID=58935538
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012392A (en) * | 2007-01-22 | 2007-08-08 | 暨南大学 | Method of removing soap and dissociative glycerin in biological diesel oil |
| CN102260597A (en) * | 2010-05-27 | 2011-11-30 | 中国石油化工股份有限公司 | Preparation method of high purity biodiesel |
| CN102941021A (en) * | 2012-11-06 | 2013-02-27 | 南京工业大学 | Low molecular weight cut-off ZrO2Preparation method of nanofiltration membrane |
| CN104263528A (en) * | 2014-10-08 | 2015-01-07 | 佛山市天晟隆油脂化工有限公司 | Preparation method of biodiesel |
-
2016
- 2016-12-02 CN CN201611094652.1A patent/CN106699514A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012392A (en) * | 2007-01-22 | 2007-08-08 | 暨南大学 | Method of removing soap and dissociative glycerin in biological diesel oil |
| CN102260597A (en) * | 2010-05-27 | 2011-11-30 | 中国石油化工股份有限公司 | Preparation method of high purity biodiesel |
| CN102941021A (en) * | 2012-11-06 | 2013-02-27 | 南京工业大学 | Low molecular weight cut-off ZrO2Preparation method of nanofiltration membrane |
| CN104263528A (en) * | 2014-10-08 | 2015-01-07 | 佛山市天晟隆油脂化工有限公司 | Preparation method of biodiesel |
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