CN1884460A - Method for non-catalytic lanolin hydrolyzed preparation of lanolin acid and lanolin alcohol using in near critical water medium - Google Patents

Method for non-catalytic lanolin hydrolyzed preparation of lanolin acid and lanolin alcohol using in near critical water medium Download PDF

Info

Publication number
CN1884460A
CN1884460A CN 200610050876 CN200610050876A CN1884460A CN 1884460 A CN1884460 A CN 1884460A CN 200610050876 CN200610050876 CN 200610050876 CN 200610050876 A CN200610050876 A CN 200610050876A CN 1884460 A CN1884460 A CN 1884460A
Authority
CN
China
Prior art keywords
lanolin
acid
warming
wool wax
water
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.)
Granted
Application number
CN 200610050876
Other languages
Chinese (zh)
Other versions
CN100398633C (en
Inventor
吕秀阳
孙辉
任其龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University ZJU
Original Assignee
Zhejiang University ZJU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang University ZJU filed Critical Zhejiang University ZJU
Priority to CNB2006100508762A priority Critical patent/CN100398633C/en
Publication of CN1884460A publication Critical patent/CN1884460A/en
Application granted granted Critical
Publication of CN100398633C publication Critical patent/CN100398633C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Fats And Perfumes (AREA)
  • Cosmetics (AREA)

Abstract

The invention discloses the method of preparing adeps lanae acid and lanolin alcohol. The method comprises the following steps: 1 adding deionized water and adeps lanae, the ratio of them being 1:1-6:1, stirring, heating, opening the air outlet valve for 2-5min; 2 heating to 200-350Deg.C, hydrolyzing for 1-8 hour; 3 cooling, separating, adding calcii chloridum fat solution, stirring for 10-60min, heating to 70-80Deg.C, separating oil and water; 4 extracting with organic solvent, acidifying, getting adeps lanae acid product, thickening, crystallizing, and getting product. The invention has the advantages of non catalyst, solving pollution problem, simple technology and high productivity.

Description

The lanolin non-catalysis hydrolyzation prepares the method for lanoceric acid and Wool wax alcohol in the near critical aqueous medium
Technical field
The present invention relates to the method that lanolin non-catalysis hydrolyzation in a kind of near critical aqueous medium prepares lanoceric acid and Wool wax alcohol.
Background technology
Lanolin is the oiliness secretory product of lamb skin adipose gland, attached to wool surface.Produce the organic waste water that contains lanolin in a large number in woollen mill's waste water from washing wool, lanolin is because saponification becomes the suspension emulsified state with emulsifying effect, and is highly muddy, if directly discharging is not only wasted resource but also can be produced severe contamination to environment.Therefore from waste water from washing wool, reclaim lanolin and develop related products and can reduce pollution greatly, have good economic worth again environment.
The derivative product that is developed by lanolin has had tens kinds, wherein most of products with lanoceric acid and Wool wax alcohol by means such as acetylize, epoxy alkylization, esterification in addition modification form.Therefore be a vital step by set out preparation lanoceric acid and Wool wax alcohol of lanolin to the development and use of lanolin.
Lanoceric acid not only can be directly as tensio-active agent, and can be used as the additive of the cosmetics of super quality.The emulsifying capacity of lanoceric acid, emulsifying stability and water-retentivity are all very strong, and skin is also had the effect of well moistening, and can promote the infiltration of water vapour to skin fat; Metallic soap and the soap analog derivative made by lanoceric acid are a kind of good oleophilic emulsifier and metal antirusting agent.
Contain a large amount of sterols materials in the Wool wax alcohol, as cholesterol, triterpene alcohol etc., can be used as nutrition agent and biologically active substance joins in the cosmetics of super quality, also can in the W/O cosmetic formulations, be used as emulsifying agent, co-emulsifier and reverse emulsive stablizer, skin is had good affinity and wettability.Wherein cholesterol is not only the important source material of liquid crystal industry; or the important intermediate of medicine industry; can be used for synthesis of vitamin d 3, artificial Calculus Bovis etc.; cholesterol can make nearly all steroid hormone medicine as a kind of natural steroid resource of steroid drugs by chemistry or microbial conversion process.The raw materials for production of China's steroid drugs still rely on resource so far and are on the brink of exhausted Chinese yam, so the sterol development of resources is extremely urgent.
At present, the method for hydrolysis of lanolin mainly contains the alkaline saponification method and changes esterification process.Saponification method mainly contains the alkali aqueous solution saponification method, alkali aqueous solution adds auxiliary agent saponification method and alkali alcoholic solution saponification method etc.; Changeing esterification process is that reactions such as lanolin and methyl alcohol are generated lanoceric acid methyl esters and Wool wax alcohol.At present domestic still based on alkali saponification method, there are problems such as lanoceric acid soap and Wool wax alcohol separation difficulty, complex process and process instability, quality product be relatively poor in this method.
(Near Critical Water NCW) typically refers to the compressed liquid water of temperature between 200~350 ℃ to near-critical water.Water has following three key properties in this zone:
1) depresses at saturated vapo(u)r, the ionization constant of NCW has a maximum value to be about 10-11 (mol/kg) 2 near 275 ℃, its value is 1000 times of normal temperature and pressure water, and ionization constant increases with the increase of pressure, [H3O+] among the NCW and [OH-] are near weak acid or weak base, therefore the function that self has acid catalysis and base catalysis can make some acid-base catalyzed reaction needn't add acid base catalysator, thereby avoid the neutralization of soda acid, the operations such as processing of salt;
2) depress at saturated vapo(u)r, the specific inductivity of 20 ℃ of water is 80.1, and has only 23.5 275 ℃ the time.Although the specific inductivity of NCW is still bigger, solubilized even ionized salts, but it is enough little with dissolved organic matter, the density that adds NCW is big, and (275 ℃ of saturated vapo(u)rs density of depressing water is 0.76g/cm3, the specific inductivity of NCW, density and acetone are close), therefore NCW has extraordinary solubility property, has the characteristic of energy while dissolved organic matter and inorganics.This can carry out the building-up reactions in many NCW media in homogeneous phase, thereby eliminates resistance to mass transfer, improves speed of response, and the reaction back only needs simple cooling just can realize separating of hydrolysate and water simultaneously, and water can be recycled;
3) physicochemical property such as the specific inductivity of near-critical water, ion-product constant, density, viscosity, spread coefficient, solubleness are adjustable continuously in the scope of broad with temperature, pressure, the rerum natura that is near-critical water has controllability, therefore as reaction medium, near-critical water has different solvent properties and reactivity worth at different states.
The present invention is applied to near-critical water on the non-catalysis hydrolyzation of lanolin as reaction medium, utilize the characteristic of near-critical water to realize no catalysis, efficient, the green hydrolysis of lanolin, and then utilize lanoceric acid to separate with the difference on the Wool wax alcohol rerum natura.
Summary of the invention
The purpose of this invention is to provide a kind of green, the lanolin non-catalysis hydrolyzation prepares the method for lanoceric acid and Wool wax alcohol in the near critical aqueous medium efficiently.
The step of method is as follows:
1) add deionized water and lanolin in autoclave, deionized water and lanolin mass ratio are 1: 1~6: 1, open stirring, are warming up to boiling under the normal pressure, open vent valve 2~5min;
2) continue to be warming up to 200~350 ℃ of hydrolysis 1~8h;
3) hydrolysate cooling back solid-liquid separation adds the calcium chloride saturated aqueous solution in the solid phase, stirs 10~60min, is warming up to 70~80 ℃, static back oily water separation;
4) oil reservoir is used organic solvent extraction after washing, and extracting phase is a lanoceric acid calcium, after acidifying the lanoceric acid product, extraction phase through concentrate, must the Wool wax alcohol product after the crystallization.
The purpose that " is warming up to 100 ℃, opened vent valve 2~5 minutes " in the step 1) of the present invention is to utilize water vapour to take away the interior oxygen of still, to reduce the generation of side reaction, improves the yield of product.The consumption of calcium chloride saturated aqueous solution is advisable with 1.1~1.3 times of theoretical consumption in the step 4).
The present invention need not add any catalyzer in reaction process, self acid-base catalysis characteristic of utilizing near-critical water makes lanolin hydrolysis in near-critical water generate lanoceric acid and Wool wax alcohol with characteristic that can dissolved organic matter, solved the pollution problem of existing method serious environmental, reaction process is simple, product yield is higher, and has realized the greenization of production process.
Description of drawings
Accompanying drawing is the process flow diagram that the lanolin non-catalysis hydrolyzation prepares lanoceric acid and Wool wax alcohol in the near critical aqueous medium.
Embodiment
Embodiment 1
In 500mL intermittent type autoclave, add 200g deionized water and 200g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 2min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 200 ℃ of hydrolysis 8h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 60min, is warming up to 70 ℃, static back oily water separation; Oil reservoir is used methanol extraction after washing, extracting phase is a lanoceric acid calcium, behind sulfuric acid acidation lanoceric acid 60.2g, extraction phase through concentrate, must Wool wax alcohol 50.7g after the crystallization.
Embodiment 2
In 500mL intermittent type autoclave, add 260g deionized water and 130g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 3min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 240 ℃ of hydrolysis 6h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 50min, is warming up to 72 ℃, static back oily water separation; Oil reservoir is used alcohol extraction after washing, extracting phase is a lanoceric acid calcium, behind hcl acidifying lanoceric acid 43.1g, extraction phase through concentrate, must Wool wax alcohol 35.6g after the crystallization.
Embodiment 3
In 500mL intermittent type autoclave, add 300g deionized water and 100g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 4min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 260 ℃ of hydrolysis 4h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 40min, is warming up to 74 ℃, static back oily water separation; With Virahol extraction, extracting phase is a lanoceric acid calcium to oil reservoir after washing, behind sulfuric acid acidation lanoceric acid 35.0g, extraction phase through concentrate, must Wool wax alcohol 29.1g after the crystallization.
Embodiment 4
In 500mL intermittent type autoclave, add 300g deionized water and 75g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 5min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 280 ℃ of hydrolysis 3h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 30min, is warming up to 76 ℃, static back oily water separation; Oil reservoir is used methanol extraction after washing, extracting phase is a lanoceric acid calcium, behind hcl acidifying lanoceric acid 31.6g, extraction phase through concentrate, must Wool wax alcohol 26.5g after the crystallization.
Embodiment 5
In 500mL intermittent type autoclave, add 300g deionized water and 60g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 2min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 300 ℃ of hydrolysis 2h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 20min, is warming up to 78 ℃, static back oily water separation; Oil reservoir is used alcohol extraction after washing, extracting phase is a lanoceric acid calcium, behind sulfuric acid acidation lanoceric acid 25.5g, extraction phase through concentrate, must Wool wax alcohol 21.3g after the crystallization.
Embodiment 6
In 500mL intermittent type autoclave, add 300g deionized water and 50g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 3min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 350 ℃ of hydrolysis 1h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 10min, is warming up to 80 ℃, static back oily water separation; With Virahol extraction, extracting phase is a lanoceric acid calcium to oil reservoir after washing, behind hcl acidifying lanoceric acid 20.5g, extraction phase through concentrate, must Wool wax alcohol 15.8g after the crystallization.
Embodiment 7
In 500mL intermittent type autoclave, add 260g deionized water and 130g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 4min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 290 ℃ of hydrolysis 2h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 10min, is warming up to 80 ℃, static back oily water separation; Oil reservoir is used methanol extraction after washing, extracting phase is a lanoceric acid calcium, behind sulfuric acid acidation lanoceric acid 49.4g, extraction phase through concentrate, must Wool wax alcohol 40.1g after the crystallization.
Embodiment 8
In 500mL intermittent type autoclave, add 260g deionized water and 130g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 5min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 280 ℃ of hydrolysis 2.5h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 20min, is warming up to 78 ℃, static back oily water separation; Oil reservoir is used alcohol extraction after washing, extracting phase is a lanoceric acid calcium, behind hcl acidifying lanoceric acid 50.1g, extraction phase through concentrate, must Wool wax alcohol 42.6g after the crystallization.
Embodiment 9
In 500mL intermittent type autoclave, add 300g deionized water and 100g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 2min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 270 ℃ of hydrolysis 3h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 30min, is warming up to 76 ℃, static back oily water separation; With Virahol extraction, extracting phase is a lanoceric acid calcium to oil reservoir after washing, behind sulfuric acid acidation lanoceric acid 36.2g, extraction phase through concentrate, must Wool wax alcohol 30.5g after the crystallization.
Embodiment 10
In 500mL intermittent type autoclave, add 300g deionized water and 100g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 3min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 260 ℃ of hydrolysis 4h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 40min, is warming up to 74 ℃, static back oily water separation; Oil reservoir is used methanol extraction after washing, extracting phase is a lanoceric acid calcium, behind hcl acidifying lanoceric acid 35.1g, extraction phase through concentrate, must Wool wax alcohol 29.8g after the crystallization.
Embodiment 11
In 500mL intermittent type autoclave, add 300g deionized water and 75g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 4min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 250 ℃ of hydrolysis 5h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 50min, is warming up to 72 ℃, static back oily water separation; Oil reservoir is used alcohol extraction after washing, extracting phase is a lanoceric acid calcium, behind sulfuric acid acidation lanoceric acid 30.5g, extraction phase through concentrate, must Wool wax alcohol 25.4g after the crystallization.
Embodiment 12
In 500mL intermittent type autoclave, add 300g deionized water and 75g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 5min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 240 ℃ of hydrolysis 6h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 60min, is warming up to 70 ℃, static back oily water separation; With Virahol extraction, extracting phase is a lanoceric acid calcium to oil reservoir after washing, behind hcl acidifying lanoceric acid 29.8g, extraction phase through concentrate, must Wool wax alcohol 24.7g after the crystallization.
Embodiment 13
In 500mL intermittent type autoclave, add 260g deionized water and 130g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 2min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 235 ℃ of hydrolysis 8h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 20min, is warming up to 70 ℃, static back oily water separation; Oil reservoir is used methanol extraction after washing, extracting phase is a lanoceric acid calcium, behind sulfuric acid acidation lanoceric acid 41.6g, extraction phase through concentrate, must Wool wax alcohol 33.9g after the crystallization.
Embodiment 14
In 500mL intermittent type autoclave, add 260g deionized water and 130g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 3min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 245 ℃ of hydrolysis 7h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 30min, is warming up to 72 ℃, static back oily water separation; Oil reservoir is used alcohol extraction after washing, extracting phase is a lanoceric acid calcium, behind hcl acidifying lanoceric acid 43.7g, extraction phase through concentrate, must Wool wax alcohol 35.1g after the crystallization.
Embodiment 15
In 500mL intermittent type autoclave, add 300g deionized water and 100g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 4min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 255 ℃ of hydrolysis 6h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 40min, is warming up to 74 ℃, static back oily water separation; With Virahol extraction, extracting phase is a lanoceric acid calcium to oil reservoir after washing, behind sulfuric acid acidation lanoceric acid 34.8g, extraction phase through concentrate, must Wool wax alcohol 28.5g after the crystallization.
Embodiment 16
In 500mL intermittent type autoclave, add 300g deionized water and 100g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 5min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 265 ℃ of hydrolysis 5h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 20min, is warming up to 76 ℃, static back oily water separation; Oil reservoir is used methanol extraction after washing, extracting phase is a lanoceric acid calcium, behind hcl acidifying lanoceric acid 36.1g, extraction phase through concentrate, must Wool wax alcohol 30.2g after the crystallization.
Embodiment 17
In 500mL intermittent type autoclave, add 300g deionized water and 75g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 3min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 275 ℃ of hydrolysis 4h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 30min, is warming up to 78 ℃, static back oily water separation; Oil reservoir is used alcohol extraction after washing, extracting phase is a lanoceric acid calcium, behind sulfuric acid acidation lanoceric acid 32.0g, extraction phase through concentrate, must Wool wax alcohol 27.1g after the crystallization.
Embodiment 18
In 500mL intermittent type autoclave, add 300g deionized water and 75g lanolin, open stirring, be warming up to boiling under the normal pressure, open vent valve 4min, utilize water vapour to get rid of the interior air of still; Continue to be warming up to 285 ℃ of hydrolysis 3h; Hydrolysate cooling back solid-liquid separation, water recycles, and adds the calcium chloride saturated aqueous solution in the solid phase, stirs 40min, is warming up to 80 ℃, static back oily water separation; With Virahol extraction, extracting phase is a lanoceric acid calcium to oil reservoir after washing, behind hcl acidifying lanoceric acid 31.5g, extraction phase through concentrate, must Wool wax alcohol 26.9g after the crystallization.

Claims (5)

1. the lanolin non-catalysis hydrolyzation prepares the method for lanoceric acid and Wool wax alcohol in the near critical aqueous medium, it is characterized in that the step of method is as follows:
1) add deionized water and lanolin in autoclave, deionized water and lanolin mass ratio are 1: 1~6: 1, open stirring, are warming up to boiling under the normal pressure, open vent valve 2~5min;
2) continue to be warming up to 200~350 ℃ of hydrolysis 1~8h;
3) hydrolysate cooling back solid-liquid separation adds the calcium chloride saturated aqueous solution in the solid phase, stirs 10~60min, is warming up to 70~80 ℃, static back oily water separation;
4) oil reservoir is used organic solvent extraction after washing, and extracting phase is a lanoceric acid calcium, after acidifying the lanoceric acid product, extraction phase through concentrate, must the Wool wax alcohol product after the crystallization.
2. the lanolin non-catalysis hydrolyzation prepares the method for lanoceric acid and Wool wax alcohol in a kind of near critical aqueous medium according to claim 1, it is characterized in that described deionized water and lanolin mass ratio are 2: 1~4: 1.
3. the lanolin non-catalysis hydrolyzation prepares the method for lanoceric acid and Wool wax alcohol in a kind of near critical aqueous medium according to claim 1, it is characterized in that described hydrolysis temperature is 240~290 ℃.
4. the lanolin non-catalysis hydrolyzation prepares the method for lanoceric acid and Wool wax alcohol in a kind of near critical aqueous medium according to claim 1, it is characterized in that the organic solvent described in the step 4) is methyl alcohol, ethanol or Virahol.
5. the lanolin non-catalysis hydrolyzation prepares the method for lanoceric acid and Wool wax alcohol in a kind of near critical aqueous medium according to claim 1, it is characterized in that the acid that the acidization described in the step 4) adopts is sulfuric acid or hydrochloric acid.
CNB2006100508762A 2006-05-19 2006-05-19 Method for non-catalytic lanolin hydrolyzed preparation of lanolin acid and lanolin alcohol using in near critical water medium Expired - Fee Related CN100398633C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2006100508762A CN100398633C (en) 2006-05-19 2006-05-19 Method for non-catalytic lanolin hydrolyzed preparation of lanolin acid and lanolin alcohol using in near critical water medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2006100508762A CN100398633C (en) 2006-05-19 2006-05-19 Method for non-catalytic lanolin hydrolyzed preparation of lanolin acid and lanolin alcohol using in near critical water medium

Publications (2)

Publication Number Publication Date
CN1884460A true CN1884460A (en) 2006-12-27
CN100398633C CN100398633C (en) 2008-07-02

Family

ID=37582767

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2006100508762A Expired - Fee Related CN100398633C (en) 2006-05-19 2006-05-19 Method for non-catalytic lanolin hydrolyzed preparation of lanolin acid and lanolin alcohol using in near critical water medium

Country Status (1)

Country Link
CN (1) CN100398633C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102127178A (en) * 2010-11-30 2011-07-20 浙江大学 Method for preparing vinyl methyl ether/vinyl alcohol copolymer through hydrolysis of poly(vinyl methyl ether) in nearcritical water

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3815755A1 (en) * 1988-05-09 1989-11-23 Henkel Kgaa METHOD FOR CATALYTIC HYDRATING LANOLIN
CN1256412C (en) * 2003-11-27 2006-05-17 陈天晓 Method for low-pressure continuous hydrolysis preparation of fatty acid
CN1304545C (en) * 2005-05-16 2007-03-14 浙江大学 Method for preparing fatty acid through continuous hydrolyzing grease without catalysis in near critical aqueous medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102127178A (en) * 2010-11-30 2011-07-20 浙江大学 Method for preparing vinyl methyl ether/vinyl alcohol copolymer through hydrolysis of poly(vinyl methyl ether) in nearcritical water
CN102127178B (en) * 2010-11-30 2012-05-30 浙江大学 Method for preparing vinyl methyl ether/vinyl alcohol copolymer through hydrolysis of poly(vinyl methyl ether) in nearcritical water

Also Published As

Publication number Publication date
CN100398633C (en) 2008-07-02

Similar Documents

Publication Publication Date Title
CN101067091B (en) Solid catalysis process of preparing biodiesel oil continuously with high acid value material
AU2010261615B2 (en) Process for production of sugars and alcohols from a cellulosic material
US7667060B2 (en) Method of producing biodiesel
CN102659590B (en) Alcoholysis recovery method of waster polylactic acid in ionic liquid environment
CN109721471B (en) Method for purifying glycerin from by-product of biodiesel production
CN103189518B (en) Method of preparing alkyl butyrate from fermented liquid using microorganisms
CN1304545C (en) Method for preparing fatty acid through continuous hydrolyzing grease without catalysis in near critical aqueous medium
CN105132189B (en) A kind of fine separation method of C18 series and C20~C22 series fatty acid methyl esters
CN113072444A (en) Method for separating and extracting R-3-hydroxy methyl butyrate
CN1844319A (en) Process for preparing bio- diesel oil by conversion of subcritical - supercritical fluid
CN101289630A (en) Method for preparing biodiesel from chinaberry seed oil
CN1884460A (en) Method for non-catalytic lanolin hydrolyzed preparation of lanolin acid and lanolin alcohol using in near critical water medium
CN101074389A (en) Production of biological diesel oil
CN113717796B (en) Method for converting fatty acid by ultrasonic-assisted nigre pressurized hydrolysis in one step
CN101045878A (en) Two-step solid acid and solid alkali catalyzing process for producing biodiesel oil
CN103588639B (en) A kind of alcoholysis recovery method of useless poly 3-hydroxy butyrate material
CN1911881A (en) Method of separating wool acid and lanonol from wool grease
CN101812700A (en) Bipolar membrane electrolysis method for ester-type hydrolysis
CN111018665A (en) Method for recycling trichloropropane in epichlorohydrin heavy component
CN100586914C (en) Method for preparing Alpha-terpineol by turpentine catalysis-free hydration in near criticality aqueous medium
CN110038547B (en) Preparation method of tin-loaded aluminum oxide nanosheet
CN1834080A (en) Process of preparing benzaldehyde through continuous hydrolysis of ammonia spirit catalytic of cinnamaldehyde in near critical water
CN105037085A (en) Method for efficiently preparing policosanol from Chinese wax by two-stage process
JP2008266418A (en) Method for producing fatty acid alkyl ester and/or glycerin
CN1323086C (en) Method for synthesizing fatty ester of maltose

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20080702

Termination date: 20110519