CN106631698B - A kind of method of hyperpure isopropyl alcohol deodorization - Google Patents
A kind of method of hyperpure isopropyl alcohol deodorization Download PDFInfo
- Publication number
- CN106631698B CN106631698B CN201611271223.7A CN201611271223A CN106631698B CN 106631698 B CN106631698 B CN 106631698B CN 201611271223 A CN201611271223 A CN 201611271223A CN 106631698 B CN106631698 B CN 106631698B
- Authority
- CN
- China
- Prior art keywords
- isopropanol
- isopropyl alcohol
- organic matter
- preferential
- thoroughly
- 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.)
- Active
Links
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)
Abstract
The invention discloses a kind of methods of hyperpure isopropyl alcohol deodorization, comprising the following steps: (1) hyperpure isopropyl alcohol is sent into preferential organic matter film separator thoroughly；(2) it is vacuumized in the per-meate side of preferential organic matter film separator thoroughly, isopropanol, which selectively penetrates through preferential organic matter film separator thoroughly and vaporizes, becomes IPA vapor；(3) isopropanol penetrating fluid is obtained after condensing IPA vapor, isopropanol penetrating fluid is odorless isopropanol.The present invention is simple and effective, easy to operate, seek to fill that the deodorization demand for the isopropanol that market is 99.80% or more to purity, and this method is not only avoided using organic solvent or other third party's substances, realize green extraction process, effective list easy to operate, low energy consumption, safety and environmental protection, reduces cost while improving deodorizing effect.
Description
Technical field
The present invention relates to a kind of methods of hyperpure isopropyl alcohol deodorization.
Background technique
Isopropanol is a kind of important industrial chemicals and organic solvent, and purposes is very extensive, is mainly used for pharmacy, makeup
Product, plastics, fragrance, coating, surfactant, cleaning agent etc..Isopropanol also serves as the solvent of oil product and colloid, and is used for fish
In the manufacture of powder feed concentrate.It is to be contained in the food such as water fruits and vegetables, dairy products and drinks since isopropanol has special fragrance
One of natural component in product.In American-European countries using it for the products such as cold drink and candy reproduce fragrance and add use.
Japan has formulated the standard that isopropanol is utilized as fragrance for 2004, and specifying isopropanol is food fragrance.It at present can be according to most
Whole purposes supplies the isopropanol of different qualities, and the regular quality of anhydrous isopropyl alcohol is 99% or more, and private-use class isopropanol content
In 99.8% or more (for essence and drug).For producing acetone, diisopropyl ether, isopropyl acetate and thymol etc..
The main method of production isopropanol is propylene hydration method both at home and abroad, according to whether generating intermediate products, it can divide again
For two methods of propylene indirect hydration method and propylene direct hydration method.
Indirect hydration method, which exists, consumes that sulfuric acid amount is big, and equipment seriously corroded, the disadvantages of energy consumption is high limit its development
System, the technology have been eliminated.
Direct hydration method is a kind of catalyst using high activity, and the new technology being adapted with environmental protection.The method gram
The shortcomings that having taken indirect hydration method has many advantages, such as efficient, low consumption, short flow, is the Main way of current hydration development.Slightly
After aqueous isopropanol alkali process, is refined through de- ether tower, azeotrope column, dehydrating tower, light, heavies column, just obtain high-purity isopropyl
Alcohol.
Even if there are still make us uncomfortable stink however, up to 99.99% isopropanol currently on the market, it is generally recognized that
It may be from the impurity such as sulfide, ether, aldehyde.Therefore, domestic and international one period is deodorized isopropanol, concentrates on sulfide removal such as sulphur
In the research of alcohol.It is removed using PbO-NaOH, ZnO-NaOH and NaOH solution extracting removal mercaptan, or using CuX molecular sieve
Mercaptan finally uses activated carbon adsorption.These methods can be reduced to mercaptans content 1ppm or so, but not remove at all so far different
The stink of propyl alcohol.Even if sulfur content drops to ppb grades, still so.
Therefore, the method for the isopropanol deodorization carried out at present, focuses primarily upon extractive distillation process, using amberlite
The material absorbings such as rouge, active carbon, activated aluminum and sand, there are many deficiencies for these methods, such as complicated for operation, and energy consumption is high, absorption
Agent is not easy to regenerate, processing cost is higher, and there are secondary pollutions etc..
Summary of the invention
The object of the present invention is to provide a kind of methods of hyperpure isopropyl alcohol deodorization, suitable for the de- of hyperpure isopropyl alcohol stink
It removes, which simplify the requirements of Processes and apparatus, and for hyperpure isopropyl alcohol, deodorising effect is good, and low energy consumption, and deodorising process will not
Bring secondary pollution.
To achieve the above object, the technical solution adopted in the present invention is as follows:
A kind of method of hyperpure isopropyl alcohol deodorization, comprising the following steps:
(1) hyperpure isopropyl alcohol is sent into preferential organic matter film separator thoroughly；
(2) it is vacuumized in the per-meate side of the preferential organic matter film separator thoroughly, isopropanol selectively permeates logical
Crossing the preferential organic matter film separator thoroughly and vaporizing becomes IPA vapor；
(3) isopropanol penetrating fluid will be obtained after IPA vapor condensation, the isopropanol penetrating fluid is odorless isopropyl
Alcohol.
Preferably, the hyperpure isopropyl alcohol is the mixture that isopropanol content is greater than 99.80%.
Preferably, the preferential organic matter film thoroughly includes preferential saturating organic matter film, and the preferential organic matter film thoroughly is that have
The preferential particular functionality film for penetrating isopropanol.
Further, the material of the preferential organic matter film thoroughly includes organosilicon polymer, fluoropolymer, poly- amino first
Acid esters, Noryl, polyether amide block copolymer, cellulose acetate, hydrophobic nano-titanium dioxide, inorganic type molecular sieve or
One or more of inorganic ceramic is combined.
Further, the organosilicon polymer includes but is not limited to dimethyl silicone polymer, poly- trimethyl silicane propine, gathers
Vinyl trimethylsilane, two silicon of polyvinyl dimethylsilane, polymethylacrylic acid trimethyl silane methyl esters and poly- hexamethyl
One of oxygen alkane is a variety of.
Further, the fluoropolymer includes but is not limited to that polytetrafluoroethylene (PTFE), Kynoar, polyhexafluoropropylene are poly-
One of propylene, polysulfonate fluorovinyl ether and teflon-copolymers are a variety of.
Preferably, in the step (1), the hyperpure isopropyl alcohol is pumped into the preferential organic matter film point thoroughly by charging
From device, and the absolute pressure range of the feed pump is 200~500kPa.
Preferably, in the step (1), the gauge pressure of the preferential organic matter film separator feed side thoroughly is 0~
0.6MPa, feeding temperature are 20~60 DEG C, and crossflow velocity is 0.08~2m/s.Preferably, described preferential in the step (2)
The per-meate side of saturating organic matter film separator is vacuumized by vacuum pump, and the vacuum degree of per-meate side is 1000~10000Pa.
Preferably, the odorless isopropanol obtained in the step (3) is molten to can be used as the use of food level isopropanol, does not pass through institute
The seepage remaining liquid for stating preferential organic matter film separator thoroughly can be used as industrial level isopropanol and use.
A kind of method of hyperpure isopropyl alcohol deodorization proposed by the present invention, creatively uses preferential saturating organic matter film, due to
Preferential organic matter film thoroughly is to the difference of different material absorption selective penetrated property, and the preferential organic matter film specific aim in the present invention
Ground is using the particular functionality film for preferentially penetrating isopropanol.After the preferential processing of organic matter film thoroughly, in hyperpure isopropyl alcohol raw material
Isopropanol is through preferential organic matter film thoroughly and is enriched in the form of a vapor in the per-meate side of film, obtains after condenser condenses
Penetrating fluid, penetrating fluid can be used for the works such as food, essence, drug through stink organoleptic analysis without any stink for odorless isopropanol
Industry field；And the seepage remaining liquid being trapped, for the isopropanol comprising substances such as water, sulfide, carbonyl classes, this kind of isopropanol can be used for
Other insensitive industry are required stink.
The beneficial effects of the present invention are:
1. the present invention carries out the deodorization of hyperpure isopropyl alcohol, and preferential saturating organic matter by preferential organic matter film separator thoroughly
Membrane separation device is used with preferentially through the particular functionality film of isopropanol, which can effectively remove the smelly of hyperpure isopropyl alcohol
Taste, obtained odorless aqueous isopropanol, meets the requirement that food level isopropanol is odorless in the market；
2. the present invention uses novel membrane separation technique, not only avoid using organic solvent or other third party's substances, it is real
Green extraction process is showed, effective list easy to operate, low energy consumption, and safety and environmental protection reduces into while improving deodorizing effect
This.
Detailed description of the invention
Fig. 1 is a kind of process flow chart of the method for hyperpure isopropyl alcohol deodorization in the present invention；
Wherein: 1: head tank, 2: feed pump, 3: preferential organic matter film separator thoroughly, 4: condenser, 5: vacuum pump, A:
Hyperpure isopropyl alcohol raw material, B: seepage remaining liquid, C: isopropanol penetrating fluid.
Specific embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
A kind of equipment of hyperpure isopropyl alcohol deodorization, including sequentially connected head tank 1, feed pump 2, preferential saturating organic matter film
Separator 3, condenser 4 and vacuum pump 5, preferential organic matter film separator thoroughly include membrane module, and membrane module by single or
Multiple preferential organic matter film unit series, parallel thoroughly or mixed connection composition.Membrane module includes preferential saturating organic matter film, preferential thoroughly organic
Object film is with the preferential particular functionality film for penetrating isopropanol.Specifically, the material of preferential organic matter film thoroughly includes organosilicon
It is polymer, fluoropolymer, polyurethanes, Noryl, polyether amide block copolymer, cellulose acetate, hydrophobic
One or more of nano-titanium dioxide, inorganic type molecular sieve or inorganic ceramic are combined.Wherein, organosilicon polymer packet
Include but be not limited to dimethyl silicone polymer, poly- trimethyl silicane propine, polyvinyl trimethyl silane, polyvinyl dimethyl-silicon
One of alkane, polymethylacrylic acid trimethyl silane methyl esters and poly- hexamethyldisiloxane are a variety of.Fluoropolymer includes
But it is total to be not limited to polytetrafluoroethylene (PTFE), Kynoar, polyhexafluoropropylene polypropylene, polysulfonate fluorovinyl ether and polytetrafluoroethylene (PTFE)
One of polymers is a variety of.
Preferential organic matter film thoroughly uses ceramics/organosilicon polymer composite membrane in the present embodiment, specific to select nine to think company
The tubular ceramic of production/dimethyl silicone polymer composite membrane.
A kind of method of hyperpure isopropyl alcohol deodorization, specific as follows:
Firstly, hyperpure isopropyl alcohol A is sent into preferential organic matter film separator 3 thoroughly.
The hyperpure isopropyl alcohol A that isopropanol content in head tank 1 is 99.850% is sent into through feed pump 2 preferential thoroughly organic
Object membrane separation device 3,2 absolute pressure of feed pump are 200kPa, and preferential organic matter film separator feed side gauge pressure thoroughly is 0MPa, operation
Temperature is 20 DEG C, crossflow velocity 0.08m/s.Preferential organic matter film thoroughly is with the preferential particular functionality for penetrating isopropanol
Film selects the nine tubular ceramic/dimethyl silicone polymer composite membranes for thinking company's production, uses aperture for 20nm Al2O3Ceramic filtering
Film is basement membrane, is prepared by the dimethyl silicone polymer being modified by mineral crystal for cortical material.
Then, it is vacuumized in the per-meate side of preferential organic matter film separator 3 thoroughly, isopropanol selectively penetrates through
Preferential organic matter film separator 3 thoroughly is simultaneously vaporized as IPA vapor.
The per-meate side of membrane separation device is equipped with vacuum pump 5, opens vacuum pump and vacuumizes, vacuum degree 1000Pa, isopropanol
Selectively infiltration evaporation becomes vapor permeable through film.
Finally, obtaining isopropanol penetrating fluid C after IPA vapor is condensed, isopropanol penetrating fluid C is odorless isopropanol.
Vapor permeable obtains penetrating fluid C after the condensation of condenser 4, does not obtain seepage remaining liquid B in retentate side through the liquid of film.
Penetrating fluid C is odorless isopropanol, can be used for the industrial circles such as food, essence, drug；And the seepage remaining liquid being trapped, for comprising water,
The isopropanol of the substances such as sulfide, carbonyl class, this kind of isopropanol can be used for other industry insensitive to stink requirement.By reason
Change analysis and stink organoleptic analysis, specific experiment testing result is shown in Table 1.
Table 1
Embodiment 2
The equipment of the deodorization of hyperpure isopropyl alcohol used by the present embodiment is similar with equipment employed in embodiment 1.And this
Preferential organic matter film employed in embodiment is that organosilicon polymer-fluoropolymer-hydrophobic nano-titanium dioxide is compound
Film, organosilicon polymer are specially dimethyl silicone polymer, and fluoropolymer is specially polytetrafluoroethylene (PTFE).
The method of the deodorization of hyperpure isopropyl alcohol used by the present embodiment is similar to Example 1, specific as follows:
The hyperpure isopropyl alcohol A that isopropanol content in head tank 1 is 99.850% is sent into through feed pump 2 preferential thoroughly organic
Object membrane separation device 3,2 absolute pressure of feed pump are 500kPa.Preferential organic matter film separator feed side gauge pressure thoroughly is 0.6MPa, behaviour
Making temperature is 30 DEG C, crossflow velocity 0.5m/s.Preferential organic matter film thoroughly is with the preferential particular functionality for penetrating isopropanol
Film selects dimethyl silicone polymer-polytetrafluoroethylene (PTFE)-hydrophobic nano-titanium dioxide composite membrane.The per-meate side of membrane separation device is set
There is vacuum pump 5, opens vacuum pump and vacuumize, vacuum degree 10000Pa, selectively infiltration evaporation becomes isopropanol through film
Vapor permeable, vapor permeable obtain penetrating fluid C after the condensation of condenser 4, do not obtain seepage remaining liquid in retentate side through the liquid of film
B.Penetrating fluid C is odorless isopropanol, can be used for the industrial circles such as food, essence, drug；And the seepage remaining liquid being trapped, for comprising
The isopropanol of the substances such as water, sulfide, carbonyl class, this kind of isopropanol can be used for other industry insensitive to stink requirement.Through
Physico-chemical analysis and stink organoleptic analysis are crossed, specific experiment testing result is shown in Table 2.
Table 2
Embodiment 3
The equipment of the deodorization of hyperpure isopropyl alcohol used by the present embodiment is similar with equipment employed in embodiment 1.And this
Preferential organic matter film employed in embodiment is that dimethyl silicone polymer-polyether amide block copolymer-inorganic ceramic is multiple
Close film.
The method of the deodorization of hyperpure isopropyl alcohol used by the present embodiment is similar to Example 1, specific as follows:
The hyperpure isopropyl alcohol A that isopropanol content in head tank 1 is 99.900% is sent into through feed pump 2 preferential thoroughly organic
Object membrane separation device 3,2 absolute pressure of feed pump are 400kPa, and preferential organic matter film separator feed side gauge pressure thoroughly is 0.1MPa, behaviour
Making temperature is 60 DEG C, crossflow velocity 2m/s.Preferential organic matter film thoroughly is that have the preferential particular functionality film for penetrating isopropanol,
Select dimethyl silicone polymer-polyether amide block copolymer-inorganic ceramic composite membrane.The per-meate side of membrane separation device is equipped with true
Sky pump 5 is opened vacuum pump and is vacuumized, vacuum degree 5000Pa, and selectively infiltration evaporation penetrates film as infiltration to isopropanol
Steam, vapor permeable obtain penetrating fluid C after the condensation of condenser 4, do not obtain seepage remaining liquid B in retentate side through the liquid of film.It seeps
Transparent liquid C is odorless isopropanol, can be used for the industrial circles such as food, essence, drug；And the seepage remaining liquid being trapped, to include water, sulphur
The isopropanol of the substances such as compound, carbonyl class, this kind of isopropanol can be used for other industry insensitive to stink requirement.By physics and chemistry
Analysis and stink organoleptic analysis, specific experiment testing result are shown in Table 3.
Table 3
Embodiment 4
The equipment of the deodorization of hyperpure isopropyl alcohol used by the present embodiment is similar with equipment employed in embodiment 1.And this
Preferential organic matter film employed in embodiment is modified dimethyl silicone polymer-Noryl-inorganic type molecular sieve
Composite membrane.
The method of the deodorization of hyperpure isopropyl alcohol used by the present embodiment is similar to Example 1, specific as follows:
The hyperpure isopropyl alcohol A that isopropanol content in head tank 1 is 99.980% is sent into through feed pump 2 preferential thoroughly organic
Object membrane separation device 3,2 absolute pressure of feed pump are 300kPa, and preferential organic matter film separator feed side gauge pressure thoroughly is 0.2MPa, behaviour
Making temperature is 50 DEG C, crossflow velocity 1.5m/s.Preferential organic matter film thoroughly is with the preferential particular functionality for penetrating isopropanol
Film selects modified dimethyl silicone polymer-Noryl-inorganic type Zeolite composite film.The per-meate side of membrane separation device
Equipped with vacuum pump 5, open vacuum pump and vacuumize, vacuum degree 4000Pa, isopropanol selectively infiltration evaporation through film at
For vapor permeable, vapor permeable obtains penetrating fluid C after the condensation of condenser 4, does not obtain more than infiltration through the liquid of film in retentate side
Liquid B.Penetrating fluid C is odorless isopropanol, can be used for the industrial circles such as food, essence, drug；And the seepage remaining liquid being trapped, for packet
The isopropanol of the substances such as aqueous, sulfide, carbonyl class, this kind of isopropanol can be used for other industry insensitive to stink requirement.
By physico-chemical analysis and stink organoleptic analysis, specific experiment testing result is shown in Table 4.
Table 4
Certainly the above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow be familiar with technique
People can understand the content of the present invention and implement it accordingly, it is not intended to limit the scope of the present invention.It is all according to this hair
The equivalent transformation or modification that the Spirit Essence of bright main technical schemes is done, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of method of hyperpure isopropyl alcohol deodorization, it is characterised in that: itself the following steps are included:
(1) hyperpure isopropyl alcohol is sent into preferential organic matter film separator thoroughly；
(2) it is vacuumized in the per-meate side of the preferential organic matter film separator thoroughly, isopropanol selectively penetrates through institute
Stating preferential organic matter film separator thoroughly and vaporizing becomes IPA vapor；The preferential organic matter film separator thoroughly includes excellent
First saturating organic matter film, the preferential organic matter film thoroughly is with the preferential particular functionality film for penetrating isopropanol；
(3) isopropanol penetrating fluid will be obtained after IPA vapor condensation, the isopropanol penetrating fluid is odorless isopropanol；
The hyperpure isopropyl alcohol is the mixture that isopropanol content is greater than 99.80%.
2. a kind of method of hyperpure isopropyl alcohol deodorization according to claim 1, it is characterised in that: the preferential saturating organic matter
The material of film includes organosilicon polymer, fluoropolymer, polyurethanes, Noryl, polyether amide block copolymerization
One or more of object, cellulose acetate, hydrophobic nano-titanium dioxide, inorganic type molecular sieve or inorganic ceramic are combined.
3. a kind of method of hyperpure isopropyl alcohol deodorization according to claim 2, it is characterised in that: the organosilicon polymer
Including dimethyl silicone polymer, poly- trimethyl silicane propine, polyvinyl trimethyl silane, polyvinyl dimethylsilane, poly- first
One of base acrylic acid trimethylsilyl methyl esters and poly- hexamethyldisiloxane are a variety of.
4. a kind of method of hyperpure isopropyl alcohol deodorization according to claim 2, it is characterised in that: the fluoropolymer packet
It includes in polytetrafluoroethylene (PTFE), Kynoar, polyhexafluoropropylene polypropylene, polysulfonate fluorovinyl ether and teflon-copolymers
It is one or more.
5. a kind of method of hyperpure isopropyl alcohol deodorization according to claim 1, it is characterised in that: in the step (1), institute
It states hyperpure isopropyl alcohol and the preferential organic matter film separator thoroughly is pumped by charging, and the absolute pressure range of the feed pump is
200~500kPa.
6. a kind of method of hyperpure isopropyl alcohol deodorization according to claim 1, it is characterised in that: in the step (1), institute
The gauge pressure for stating preferential organic matter film separator feed side thoroughly is 0~0.6MPa, and feeding temperature is 20~60 DEG C, and crossflow velocity is
0.08~2m/s.
7. a kind of method of hyperpure isopropyl alcohol deodorization according to claim 1, it is characterised in that: in the step (2), institute
The per-meate side for stating preferential organic matter film separator thoroughly is vacuumized by vacuum pump, and the vacuum degree of per-meate side be 1000~
10000Pa。
8. a kind of method of hyperpure isopropyl alcohol deodorization according to claim 1, it is characterised in that: obtained in the step (3)
The odorless isopropanol obtained can be used as the use of food level isopropanol, not can be used as industrial level isopropanol through the seepage remaining liquid of film and uses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611271223.7A CN106631698B (en) | 2016-12-30 | 2016-12-30 | A kind of method of hyperpure isopropyl alcohol deodorization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611271223.7A CN106631698B (en) | 2016-12-30 | 2016-12-30 | A kind of method of hyperpure isopropyl alcohol deodorization |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106631698A CN106631698A (en) | 2017-05-10 |
| CN106631698B true CN106631698B (en) | 2019-09-03 |
Family
ID=58838598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611271223.7A Active CN106631698B (en) | 2016-12-30 | 2016-12-30 | A kind of method of hyperpure isopropyl alcohol deodorization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106631698B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107837682B (en) * | 2017-12-25 | 2024-04-12 | 江苏久膜高科技股份有限公司 | Device and method for extracting medicine products in organic solution by double-membrane method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102159528A (en) * | 2008-09-19 | 2011-08-17 | 日挥株式会社 | Method for producing alcohol, method for producing hydrogen or synthetic gas using method for producing alcohol, and alcohol |
-
2016
- 2016-12-30 CN CN201611271223.7A patent/CN106631698B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102159528A (en) * | 2008-09-19 | 2011-08-17 | 日挥株式会社 | Method for producing alcohol, method for producing hydrogen or synthetic gas using method for producing alcohol, and alcohol |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106631698A (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9200238B2 (en) | Pomelo peel essential oil extraction method by peel icing and breaking | |
| CN104312881B (en) | A kind of method that during liquor production, yellow water recycles entirely | |
| CN101735648B (en) | Method for separating and purifying beet red pigment by two aqueous phase extraction system | |
| CN103340767B (en) | Rose water concentrated liquor processing method | |
| CN103305391A (en) | Method for improving liquor grade | |
| CN103627528A (en) | Method for extracting lavender essential oil | |
| CN101570484A (en) | Method for preparing pesticide residue grade chromatographic ethyl acetate | |
| CN1634914A (en) | Method for producing high pure tea polyphenol with low caffeine | |
| CN103289810B (en) | Separation and extraction method of garlic oil | |
| CN104774182A8 (en) | The extraction of erythrothioneine and purification process | |
| CN102408140A (en) | Method for removing and recycling volatile alcohol organic matters in water | |
| CN106631698B (en) | A kind of method of hyperpure isopropyl alcohol deodorization | |
| CN103333056B (en) | Method and device for deeply removing sulfide in MTBE | |
| CN1301252C (en) | Production method of high purity tea polyphenol and caffeine | |
| CN106148013A (en) | A kind of plant perfume low-temperature extraction technology | |
| CN104945249A (en) | Method and device for producing ethyl formate through reactive distillation and steam osmosis membrane coupling | |
| CN104207083B (en) | A kind of natural rose spends the extracting method of effective fragrance component | |
| CN108424350A (en) | A kind of technique of purification medicinal ethyl alcohol | |
| CN103173342A (en) | Device and method for removing fusel oil out of fruit wine | |
| CN106221985A (en) | Wine distillation fractional distillation and anhydrous allocating technology | |
| CN102516112B (en) | Preparation method for chromatographic grade N,N-dimethyl formamide | |
| CN105712897A (en) | Tea polyphenol extracting and recycling method | |
| CN106398873B (en) | preparation method of tea tree flower essential oil | |
| CN205925041U (en) | 3, 3' dichloro 4, 4' diamino diphenyl methane device of purifing | |
| CN108410582A (en) | A kind of extracting method of Rosa Damascana |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201030 Address after: No.1, yanchuang garden, Nanjing area, China (Jiangsu) pilot Free Trade Zone, Nanjing, Jiangsu Province, 211800 Patentee after: Jiangsu jiumo Hi Tech Co., Ltd Address before: 211800 No. 8 Fenghuang Road, Pukou Economic Development Zone, Nanjing, Jiangsu Patentee before: NANJING JIUSI HIGH-TECH Co.,Ltd. |