CN109897731A - A method of utilizing preparing fatty acid by illegal cooking oil - Google Patents
A method of utilizing preparing fatty acid by illegal cooking oil Download PDFInfo
- Publication number
- CN109897731A CN109897731A CN201910283304.6A CN201910283304A CN109897731A CN 109897731 A CN109897731 A CN 109897731A CN 201910283304 A CN201910283304 A CN 201910283304A CN 109897731 A CN109897731 A CN 109897731A
- Authority
- CN
- China
- Prior art keywords
- fatty acid
- pumped
- hydrolysis
- pressure
- temperature
- Prior art date
- 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.)
- Pending
Links
Landscapes
- Fats And Perfumes (AREA)
Abstract
The present invention provides a kind of methods using preparing fatty acid by illegal cooking oil, comprising the following steps: (1) gutter oil pre-processes: gutter oil being pumped into pretreatment tank from head tank and is pre-processed, the gutter oil pre-processed is obtained；(2) pressure hydrolysis in: the gutter oil pre-processed in step (1) is pumped into hydrolysis tower, add the basic anhydride of 0.010~0.015wt%, it is then slowly heated pressurization, when temperature is raised to 220~250 DEG C, when pressure is to 2.5~3.0MPa, after keeping 6~8h of the pressure and temperature, the acidity of hydrolysate is measured；Acidity reaches in 180~195 ranges, slowly decompression cooling, the product after being hydrolyzed；(3) water-oil separating；(4) distillation under pressure: distillation obtains fatty acid.Method of the present invention using preparing fatty acid by illegal cooking oil, accelerates the hydrolysis of grease, reduces hydrolysising condition, shorten the reaction time, improves the yield of process units.
Description
Technical field
The present invention relates to trench oil recovery techniques fields, more particularly, to a kind of side using preparing fatty acid by illegal cooking oil
Method.
Background technique
Gutter oil refers to the oil separator recycling of kitchen castoff oiliness rubbish, city large-scale restaurant sewer in life
The grease by certain processing refining production such as frying oil of grease and restaurant's Reusability, is the custom of waste oils and fats
Claim.Edible gutter oil easily causes cancer, to the very harmful of human body.It, can be with but since gutter oil contains a large amount of aliphatic ester
Using different production methods, fatty acid and its series of products are produced.Fatty acid is essential industry raw material, can be used for butadiene-styrene rubber
Emulsifier and other surfactants in production etc..
Fatty acid is produced using gutter oil, can not only turn waste into wealth, can also find a way out for waste cooking oil, avoid flowing
Enter edible oil market to be detrimental to health, also avoids flowing directly into sewer pollution environment and still prepared currently with gutter oil
The yield of fatty acid is lower, and the reaction time is long.
Summary of the invention
In view of the above technical problems, the purpose of the present invention is to provide a kind of method using preparing fatty acid by illegal cooking oil,
Using hydrolysis separation method, fatty acid is produced using gutter oil, the yield of fatty acid is greatly increased, reduces the waste of gutter oil,
Increase economic benefit.
The technical solution adopted by the present invention is that:
A method of utilizing preparing fatty acid by illegal cooking oil, comprising the following steps:
(1) gutter oil pre-processes: gutter oil being pumped into pretreatment tank from head tank, 30~50 DEG C is heated to, then exists
0.01~0.03wt% of sodium chloride solution is added under stirring condition, then proceedes to 40~50min of stirring, after heat preservation stands 4~6h,
From the bottom blow-down mouth discharge moisture and solid impurity of the pretreatment tank, the gutter oil pre-processed is obtained；
(2) pressure hydrolysis in: the gutter oil pre-processed in step (1) is pumped into hydrolysis tower, and addition 0.010~
The basic anhydride of 0.015wt% are then slowly heated pressurization, when temperature is raised to 220~250 DEG C, pressure to 2.5~3.0MPa
When, after keeping 6~8h of the pressure and temperature, measure the acidity of hydrolysate；Acidity reaches in 180~195 ranges, slowly decompression drop
Temperature；When hydrolysis tower pressure drops to normal pressure, after 30 DEG C of temperature or less, the product after being hydrolyzed；
(3) water-oil separating: the product after hydrolysis in step (2) is pumped into after grease is sufficiently separated in knockout tower, is obtained
Croude fatty acids；
(4) distillation under pressure: after croude fatty acids described in step (3) are pumped into distillation still, distillation obtains fatty acid.
Method of the present invention using preparing fatty acid by illegal cooking oil, wherein the following steps are included:
(1) gutter oil pre-processes: gutter oil being pumped into pretreatment tank from head tank, 30~50 DEG C is heated to, then exists
0.01~0.03wt% of sodium chloride solution is added under stirring condition, then proceedes to 40~50min of stirring, after heat preservation stands 4~6h,
From the bottom blow-down mouth discharge moisture and solid impurity of the pretreatment tank, the gutter oil pre-processed is obtained；
(2) pressure hydrolysis in: the gutter oil pre-processed in step (1) is pumped into hydrolysis tower, and addition 0.010~
The basic anhydride of 0.015wt% are then slowly heated pressurization, when temperature is raised to 220~250 DEG C, pressure to 2.5~3.0MPa
When, after keeping 8~10h of the pressure and temperature, measure the acidity of hydrolysate；Acidity reaches in 180~195 ranges, slowly depressurizes
Cooling；When hydrolysis tower pressure drops to normal pressure, after 30 DEG C of temperature or less, the product after being hydrolyzed；
(3) water-oil separating: the product after hydrolysis in step (2) is pumped into after grease is sufficiently separated in knockout tower, is obtained
Croude fatty acids；
(4) distillation under pressure: after croude fatty acids described in step (3) are pumped into distillation still, distillation obtains fatty acid；
(5) fatty acid treating: fatty acid described in step (4) is pumped into refining and distilling kettle, keep vacuum degree be-
0.1MPa intercepts 250~290 DEG C of distillages, obtains refined fat acid.
Method of the present invention using preparing fatty acid by illegal cooking oil, wherein basic anhydride described in step (2) are
Aluminum oxide.
Method of the present invention using preparing fatty acid by illegal cooking oil, wherein sodium chloride solution described in step (1) is
Saturated sodium-chloride water solution.
Method of the present invention using preparing fatty acid by illegal cooking oil, wherein water-oil separating described in step (3) is specific
Are as follows: the product after hydrolysis in step (2) is pumped into 3~6h of standing in knockout tower, after grease is sufficiently separated, from the knockout tower
Bottom discharge hydrolysis generate sewage, obtain croude fatty acids.
Method of the present invention using preparing fatty acid by illegal cooking oil, wherein distillation under pressure described in step (4) is specific
Are as follows: after croude fatty acids described in step (3) are pumped into distillation still, slowly decompression and heating, when temperature reaches 220 DEG C, vacuum
Degree reaches -0.08~-0.1MPa, starts to distill, and after temperature reaches 300 DEG C, stops heating, distillation obtains fatty acid.Vacuum
Degree is -0.08~-0.1MPa, can reduce material boiling point, sufficiently raising distillation efficiency.
The invention has the advantages that:
Method of the present invention using preparing fatty acid by illegal cooking oil, has introduced gutter oil pretreating process, has utilized chlorine
Change the impurity in sodium solution absorption grease, and screening is optimized to parameters such as method medium temperature degree and hydrolysis times, to remove ground
Ditch water content in oil and a small amount of solid refuse, improve the quality of product fatty acid；Added with alkaline oxygen in middle pressure hydrolytic process
Compound is aluminum oxide as hydrolytic accelerating agent, the basic anhydride, accelerates the hydrolysis of grease, reduces hydrolysis item
Part shortens the reaction time, improves reaction rate, shortens the production cycle, improves the yield of process units.
Specific embodiment
Embodiment 1
A method of utilizing preparing fatty acid by illegal cooking oil, comprising the following steps:
(1) gutter oil pre-processes: gutter oil being pumped into pretreatment tank from head tank, 30~50 DEG C is heated to, then exists
Sodium chloride solution 0.01wt% is added under stirring condition, stirring 50min is then proceeded to, after heat preservation stands 4h, from the pretreatment
The bottom blow-down mouth discharge moisture and solid impurity of tank, obtain the gutter oil pre-processed, and the sodium chloride solution is saturation chlorine
Change sodium water solution；
(2) pressure hydrolysis in: the gutter oil pre-processed in step (1) is pumped into hydrolysis tower, adds 0.015wt%'s
Basic anhydride are then slowly heated pressurization, when temperature is raised to 220~250 DEG C, when pressure is to 2.5~3.0MPa, keep the pressure
After power and temperature 6.5h, the acidity of hydrolysate is measured；Acidity reaches in 180~195 ranges, slowly decompression cooling；Work as hydrolysis tower
Pressure drops to normal pressure, after 30 DEG C of temperature or less, the product after being hydrolyzed；The basic anhydride are aluminum oxide
(Al2O3)；Hydrolysis temperature high energy promotes hydrolysis but temperature too high-energy source consumption is big, increases production cost；Hydrolysis time is long, can be with
It is fully hydrolyzed, but hydrolysis time is too long, influences enterprise production and production scale；
(3) water-oil separating: the product after hydrolysis in step (2) is pumped into knockout tower and stands 3h, grease is sufficiently separated
Afterwards, the sewage that hydrolysis generates is discharged from the bottom of the knockout tower, obtains croude fatty acids；
(4) distillation under pressure: after croude fatty acids described in step (3) are pumped into distillation still, slowly decompression and heating, work as temperature
Degree reaches 220 DEG C, and vacuum degree reaches -0.08~-0.1MPa, starts to distill, and after temperature reaches 300 DEG C, stops heating, distillation
Fatty acid out.
Embodiment 2
A method of utilizing preparing fatty acid by illegal cooking oil, comprising the following steps:
(1) gutter oil pre-processes: gutter oil being pumped into pretreatment tank from head tank, 30~50 DEG C is heated to, then exists
Sodium chloride solution 0.03wt% is added under stirring condition, stirring 40min is then proceeded to, after heat preservation stands 6h, from the pretreatment
The bottom blow-down mouth discharge moisture and solid impurity of tank, obtain the gutter oil pre-processed, and the sodium chloride solution is saturation chlorine
Change sodium water solution；
(2) pressure hydrolysis in: the gutter oil pre-processed in step (1) is pumped into hydrolysis tower, adds 0.01wt%'s
Basic anhydride are then slowly heated pressurization, when temperature is raised to 220~250 DEG C, when pressure is to 2.5~3.0MPa, keep the pressure
After power and temperature 6.5h, the acidity of hydrolysate is measured；Acidity reaches in 180~195 ranges, slowly decompression cooling；Work as hydrolysis tower
Pressure drops to normal pressure, after 30 DEG C of temperature or less, the product after being hydrolyzed；The basic anhydride are aluminum oxide
(Al2O3)；
(3) water-oil separating: the product after hydrolysis in step (2) is pumped into knockout tower and stands 6h, grease is sufficiently separated
Afterwards, the sewage that hydrolysis generates is discharged from the bottom of the knockout tower, obtains croude fatty acids；
(4) distillation under pressure: after croude fatty acids described in step (3) are pumped into distillation still, slowly decompression and heating, work as temperature
Degree reaches 220 DEG C, and vacuum degree reaches -0.08~-0.1MPa, starts to distill, and after temperature reaches 300 DEG C, stops heating, distillation
Fatty acid out.
Embodiment 3
A method of utilizing preparing fatty acid by illegal cooking oil, comprising the following steps:
(1) gutter oil pre-processes: gutter oil being pumped into pretreatment tank from head tank, 30~50 DEG C is heated to, then exists
Sodium chloride solution 0.01wt% is added under stirring condition, stirring 50min is then proceeded to, after heat preservation stands 4h, from the pretreatment
The bottom blow-down mouth discharge moisture and solid impurity of tank, obtain the gutter oil pre-processed, and the sodium chloride solution is saturation chlorine
Change sodium water solution；
(2) pressure hydrolysis in: the gutter oil pre-processed in step (1) is pumped into hydrolysis tower, adds 0.015wt%'s
Basic anhydride are then slowly heated pressurization, when temperature is raised to 220~250 DEG C, when pressure is to 2.5~3.0MPa, keep the pressure
After power and temperature 6.5h, the acidity of hydrolysate is measured；Acidity reaches in 180~195 ranges, slowly decompression cooling；Work as hydrolysis tower
Pressure drops to normal pressure, after 30 DEG C of temperature or less, the product after being hydrolyzed；The basic anhydride are aluminum oxide
(Al2O3)；Hydrolysis temperature high energy promotes hydrolysis but temperature too high-energy source consumption is big, increases production cost.Hydrolysis time is long, can be with
It is fully hydrolyzed, but hydrolysis time is too long, influences enterprise production and production scale；
(3) water-oil separating: the product after hydrolysis in step (2) is pumped into knockout tower and stands 3h, grease is sufficiently separated
Afterwards, the sewage that hydrolysis generates is discharged from the bottom of the knockout tower, obtains croude fatty acids；
(4) distillation under pressure: after croude fatty acids described in step (3) are pumped into distillation still, slowly decompression and heating, work as temperature
Degree reaches 220 DEG C, and vacuum degree reaches -0.08~-0.1MPa, starts to distill, and after temperature reaches 300 DEG C, stops heating, distillation
Fatty acid out；
(5) fatty acid treating: when need fatty acid quality it is higher when, need further to refine fatty acid；By step
(4) fatty acid described in is pumped into refining and distilling kettle, and holding vacuum degree is -0.1MPa, intercepts 260~290 DEG C of distillages,
Obtain refined fat acid.
Embodiment 4
A method of utilizing preparing fatty acid by illegal cooking oil, comprising the following steps:
(1) gutter oil pre-processes: gutter oil being pumped into pretreatment tank from head tank, 30~50 DEG C is heated to, then exists
Sodium chloride solution 0.03wt% is added under stirring condition, stirring 40min is then proceeded to, after heat preservation stands 6h, from the pretreatment
The bottom blow-down mouth discharge moisture and solid impurity of tank, obtain the gutter oil pre-processed, and the sodium chloride solution is saturation chlorine
Change sodium water solution；
(2) pressure hydrolysis in: the gutter oil pre-processed in step (1) is pumped into hydrolysis tower, adds 0.01wt%'s
Basic anhydride are then slowly heated pressurization, when temperature is raised to 220~250 DEG C, when pressure is to 2.5~3.0MPa, keep the pressure
After power and temperature 6.5h, the acidity of hydrolysate is measured；Acidity reaches in 180~195 ranges, slowly decompression cooling；Work as hydrolysis tower
Pressure drops to normal pressure, after 30 DEG C of temperature or less, the product after being hydrolyzed；The basic anhydride are aluminum oxide
(Al2O3)；
(3) water-oil separating: the product after hydrolysis in step (2) is pumped into knockout tower and stands 6h, grease is sufficiently separated
Afterwards, the sewage that hydrolysis generates is discharged from the bottom of the knockout tower, obtains croude fatty acids；
(4) distillation under pressure: after croude fatty acids described in step (3) are pumped into distillation still, slowly decompression and heating, work as temperature
Degree reaches 220 DEG C, and vacuum degree reaches -0.08~-0.1MPa, starts to distill, and after temperature reaches 300 DEG C, stops heating, distillation
Fatty acid out；
(5) fatty acid treating: when need fatty acid quality it is higher when, need further to refine fatty acid；By step
(4) fatty acid described in is pumped into refining and distilling kettle, and holding vacuum degree is -0.1MPa, intercepts 250~280 DEG C of distillages,
Obtain refined fat acid.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.
Claims (6)
1. a kind of method using preparing fatty acid by illegal cooking oil, it is characterised in that: the following steps are included:
(1) gutter oil pre-processes: gutter oil being pumped into pretreatment tank from head tank, 30~50 DEG C is heated to, is then stirring
Under the conditions of 0.01~0.03wt% of sodium chloride solution is added, 40~50min of stirring is then proceeded to, after heat preservation stands 4~6h, from institute
The bottom blow-down mouth discharge moisture and solid impurity for stating pretreatment tank, obtain the gutter oil pre-processed；
(2) pressure hydrolysis in: the gutter oil pre-processed in step (1) is pumped into hydrolysis tower, and addition 0.010~
The basic anhydride of 0.015wt% are then slowly heated pressurization, when temperature is raised to 220~250 DEG C, pressure to 2.5~3.0MPa
When, after keeping 6~8h of the pressure and temperature, measure the acidity of hydrolysate；Acidity reaches in 180~195 ranges, slowly decompression drop
Temperature；When hydrolysis tower pressure drops to normal pressure, after 30 DEG C of temperature or less, the product after being hydrolyzed；
(3) water-oil separating: the product after hydrolysis in step (2) is pumped into after grease is sufficiently separated in knockout tower, thick rouge is obtained
Fat acid；
(4) distillation under pressure: after croude fatty acids described in step (3) are pumped into distillation still, distillation obtains fatty acid.
2. the method according to claim 1 using preparing fatty acid by illegal cooking oil, it is characterised in that: the following steps are included:
(1) gutter oil pre-processes: gutter oil being pumped into pretreatment tank from head tank, 30~50 DEG C is heated to, is then stirring
Under the conditions of 0.01~0.03wt% of sodium chloride solution is added, 40~50min of stirring is then proceeded to, after heat preservation stands 4~6h, from institute
The bottom blow-down mouth discharge moisture and solid impurity for stating pretreatment tank, obtain the gutter oil pre-processed；
(2) pressure hydrolysis in: the gutter oil pre-processed in step (1) is pumped into hydrolysis tower, and addition 0.010~
The basic anhydride of 0.015wt% are then slowly heated pressurization, when temperature is raised to 220~250 DEG C, pressure to 2.5~3.0MPa
When, after keeping 6~8h of the pressure and temperature, measure the acidity of hydrolysate；Acidity reaches in 180~195 ranges, slowly decompression drop
Temperature；When hydrolysis tower pressure drops to normal pressure, after 30 DEG C of temperature or less, the product after being hydrolyzed；
(3) water-oil separating: the product after hydrolysis in step (2) is pumped into after grease is sufficiently separated in knockout tower, thick rouge is obtained
Fat acid；
(4) distillation under pressure: after croude fatty acids described in step (3) are pumped into distillation still, distillation obtains fatty acid；
(5) fatty acid treating: fatty acid described in step (4) is pumped into refining and distilling kettle, keep vacuum degree be-
0.1MPa intercepts 250~290 DEG C of distillages, obtains refined fat acid.
3. the method according to claim 1 or 2 using preparing fatty acid by illegal cooking oil, it is characterised in that: institute in step (2)
Stating basic anhydride is aluminum oxide.
4. the method according to claim 1 or 2 using preparing fatty acid by illegal cooking oil, it is characterised in that: institute in step (1)
Stating sodium chloride solution is saturated sodium-chloride water solution.
5. the method according to claim 1 or 2 using preparing fatty acid by illegal cooking oil, it is characterised in that: institute in step (3)
State water-oil separating specifically: the product after hydrolysis in step (2) is pumped into 3~6h of standing, grease in knockout tower and is sufficiently separated
Afterwards, the sewage that hydrolysis generates is discharged from the bottom of the knockout tower, obtains croude fatty acids.
6. the method according to claim 1 or 2 using preparing fatty acid by illegal cooking oil, it is characterised in that: institute in step (4)
State distillation under pressure specifically: after croude fatty acids described in step (3) are pumped into distillation still, slowly decompression and heating, work as temperature
Reach 220 DEG C, vacuum degree reaches -0.08~-0.1MPa, starts to distill, and after temperature reaches 300 DEG C, stops heating, distills
To fatty acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910283304.6A CN109897731A (en) | 2019-04-10 | 2019-04-10 | A method of utilizing preparing fatty acid by illegal cooking oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910283304.6A CN109897731A (en) | 2019-04-10 | 2019-04-10 | A method of utilizing preparing fatty acid by illegal cooking oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109897731A true CN109897731A (en) | 2019-06-18 |
Family
ID=66955496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910283304.6A Pending CN109897731A (en) | 2019-04-10 | 2019-04-10 | A method of utilizing preparing fatty acid by illegal cooking oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109897731A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1931963A (en) * | 2006-09-29 | 2007-03-21 | 叶正尧 | Pre-treating process for preparing biological diesel oil with waste animal and vegetable oil |
| CN101928644A (en) * | 2010-09-07 | 2010-12-29 | 昆明理工大学 | Method for preparing fatty acid by illegal cooking oil |
| CN102504959A (en) * | 2011-11-17 | 2012-06-20 | 苏州新区星火环境净化有限公司 | Method for producing mixed higher fatty acids by utilizing drainage oil |
| CN103194255A (en) * | 2013-04-18 | 2013-07-10 | 方建华 | Method for producing clean fuels by catalyzing and cracking animal and vegetable oil |
| CN105670800A (en) * | 2016-04-05 | 2016-06-15 | 浙江宇翔生物科技有限公司 | Method for preparing fatty acid by utilizing illegal cooking oil |
| CN106398875A (en) * | 2016-11-11 | 2017-02-15 | 禄丰云瑞油脂科技有限公司 | Method for producing stearic acid by using swill-cooked dirty oil |
-
2019
- 2019-04-10 CN CN201910283304.6A patent/CN109897731A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1931963A (en) * | 2006-09-29 | 2007-03-21 | 叶正尧 | Pre-treating process for preparing biological diesel oil with waste animal and vegetable oil |
| CN101928644A (en) * | 2010-09-07 | 2010-12-29 | 昆明理工大学 | Method for preparing fatty acid by illegal cooking oil |
| CN102504959A (en) * | 2011-11-17 | 2012-06-20 | 苏州新区星火环境净化有限公司 | Method for producing mixed higher fatty acids by utilizing drainage oil |
| CN103194255A (en) * | 2013-04-18 | 2013-07-10 | 方建华 | Method for producing clean fuels by catalyzing and cracking animal and vegetable oil |
| CN105670800A (en) * | 2016-04-05 | 2016-06-15 | 浙江宇翔生物科技有限公司 | Method for preparing fatty acid by utilizing illegal cooking oil |
| CN106398875A (en) * | 2016-11-11 | 2017-02-15 | 禄丰云瑞油脂科技有限公司 | Method for producing stearic acid by using swill-cooked dirty oil |
Non-Patent Citations (2)
| Title |
|---|
| 刘玉兰: "大豆油脚生产脂肪酸的工艺研究及经济效益评价", 《中国粮油学报》 * |
| 宋建国: "用地沟油生产精制混合脂肪酸", 《牡丹江大学学报》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101638361A (en) | Method for extracting and refining docosahexaenoic acid from schizochytrium | |
| Hang et al. | Solid state fermentation of apple pomace for citric acid production | |
| US10138501B2 (en) | Method for preparing diglyceride using bubble column reactor | |
| CN1310903C (en) | Method for extracting natural vitamin E from vegetable oil and fat refining and deodorizing distillate | |
| CN102246979A (en) | Method for extracting fish oil from waste sleeve-fish liver | |
| CN106755151B (en) | Method for producing ARA by utilizing microbial fermentation | |
| CN110894516A (en) | Method for preparing functional beef tallow by biological method | |
| CN204022786U (en) | A kind of high-temperature reflux hydrolysate oil is separated the device preparing lipid acid | |
| CN102776074A (en) | Method for producing fatty acid from plant oil scraps | |
| CN105670764A (en) | Method for extracting squid oil | |
| CN107057858A (en) | Reduce the supercritical carbon dioxide method for extracting and device of extract acid value | |
| CN105542948A (en) | Method for preparing concentrated fish oil by virtue of squid waste | |
| CN103734361B (en) | Structure lipid prepared from modified cottonseed oil fractionation product and preparation method thereof | |
| CN109897731A (en) | A method of utilizing preparing fatty acid by illegal cooking oil | |
| CN107022407A (en) | A kind of preparation method of cottonseed oil | |
| CN101550078A (en) | Method of supercritical extraction of unsaturated fatty acid of schizochytrium limacinum | |
| CN105273851B (en) | A method of preparing aliphatic ester | |
| CN110791376B (en) | Supercritical CO 2 Method for removing free fatty acid in camellia seed oil by microemulsion | |
| CN205653423U (en) | Vegetable oil integration refining equipment | |
| CN1896204A (en) | Continuous oil fat refining process | |
| CN105483169A (en) | Method for producing aliphatic acid through utilization of gutter cooking oil in enzymic method | |
| CN110862862A (en) | Method for simultaneously preparing xanthoceras sorbifolia Bunge oil and xanthoceras sorbifolia Bunge protein by aqueous enzymatic method | |
| CN1775728A (en) | Method for extracting omega 6 polyunsaturated fatty acid from plant seeds | |
| CN114032259B (en) | High-density fermentation and hexadecenoic acid extraction method of saccharomycetes | |
| CN109536269A (en) | A method of fish oil is extracted using fish head and fish-skin |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190618 |
|
| RJ01 | Rejection of invention patent application after publication |