CN104745647A - Method for enzymic-method esterification processing of grease and grease prepared by using same - Google Patents

Abstract

The invention provides a method for enzymic-method esterification processing of grease and grease prepared by using the same. By using the method provided by the invention, the esterification efficiency of the grease can be improved.

Description

Grease prepared by a kind of method of enzyme process esterification treatment grease and use the method

Technical field

The invention belongs to fats and oils processing field, specifically, a kind of method relating to enzyme process esterification treatment grease and the grease using the method to prepare.

Background technology

Lipid acid composition in Rice pollard oil (Rice oil) rationally, oleic acid and linolic acid ratio close to the World Health Organization (WHO) recommend 1: 1 ratio, and containing abundant nutritive substance in Rice pollard oil, as thiaminogen, squalene, tocotrienols etc., be the rational edible vegetable oil of a kind of nutrition.But owing to containing very active lipase in rice bran, contained fat splitting in rice bran can be made under proper condition at short notice to become lipid acid, make rice bran and Rice pollard oil due to transport between manufacturing enterprise and deposit, causing the Rice bran crude oil acid number of production very high.Meanwhile, due to through refining treatment, particularly after depickling process, the content of the thiaminogen in Rice oil and total sterol etc. reduces obviously, have impact on the edibleness of Rice oil.

Alkali-refining deacidification conventional in oil prodution industry and physical deacidification method are used for peracid value rice bran oil and all there is the too high problem of loss, chemical refining also can cause a large amount of losses of the nutritive ingredient such as thiaminogen in grease, to a large amount of organic waste water be produced, contaminate environment in addition.Study more chemical catalysis esterification Rice pollard oil depickling at present and then deposit the problem that temperature is too high in operation.Enzyme process depickling is a kind of new meter oil extracted from rice husks acid stripping method.This method utilizes the free fatty acids (FFA) of specific lipase under certain condition in catalysis grease and glycerine generation esterification, makes most of FFA change into glyceryl ester, thus reduces the content of FFA in Rice pollard oil.

For enzyme process deacidifying process, many scientific research personnel are studied and deliver and achieve suitable achievement, such as:

The people such as D.K.Bhattacharyya (D.K.Bhattacharyya.Deacidification of high-acid rice bran oil byreesterification with monoglycerides [J] .Journal of the American Oil Chemists ' Society.1999.76 (10): 1243-1246) report under temperature of reaction 210 DEG C and vacuum condition 10mm Hg, can by Rice oil Free Fat acid content by 9.5-35.0%(w/w by controlling mono-glycerides addition) drop to 0.5 ± 0.10 to 3.5 ± 0.19%(w/w).But there is a large amount of Tegin 55Gs in the grease after using the method to transform, easily spume during use.

The people such as Sengupta (Sengupta R, Bhattacharyya D K.Effect of monoglycerides on enzymaticdeacidification of rice bran oil [J] .Journal-Oil technologists association of India, 1996,28:125-130.) utilizing the free fatty acids in lipase (M.meihei) catalysis Rice oil and mono-glycerides to react, Rice oil Free Fat acid content can be dropped to 2% ~ 4% by 8.6% ~ 16.9% by controlling mono-glycerides addition.But need to add the content that a certain amount of Tegin 55G could reduce free fatty acids.

The people such as Li Guihua (Li Guihua etc., the research [J] of high-acid value rice bran oil esterification depickling. Zhengzhou Engineering College's journal, 2002 (1): 36-38.) report the method that chemical esterification reduces Rice oil acid value.But owing to using chemical esterification, cause the method to need hot conditions and catalyzer easily remains.

The people such as Wang Shirang (Wang Shirang etc. the research [J] of high-acid value grease esterification deacidification novel process. foodstuffs industry science and technology .2010 (3): 252-255.) in the reactor that 2MPa fills nitrogen, pre-esterification process is carried out to peracid value rice bran oil, pre-esterification temperature 180 DEG C, time 4h, the FFA of Rice pollard oil drops to 13.8% from 20.5% with this understanding; Then show that 2MPa fills the optimal conditions of immobilized lipase enzyme process esterification deacidification reaction under nitrogen condition: esterification temperature 55 DEG C, glycerine addition is 0.31g, esterification time 8h, immobilized lipase addition is that oil weighs 5%, siccative addition is that oil weighs 1.5%, and the FFA of Rice pollard oil is down to 2.12% by 13.18% with this understanding.The document provides a kind of pretreatment technology of raw material, but the method is realized by high-temperature pressurizing, and pretreatment condition requires high, and efficiency is on the low side.

US4698186 discloses a kind of method reducing grease Free Fat acid content.The method reduces the free fatty acid content in grease with acid cation-exchanger catalysis.But the method use methyl alcohol, the subsidiary material such as Zeo-karb, be not suitable for fats and oils processing and suitability for industrialized production.

WO2004/043894A1 discloses a kind of method of enzyme law catalysis esterification fish oil.The method by carry out after enzyme process esterification fish oil molecule arrange be separated to being rich in EPA(C20:5) and DHA(from C22:6) method of ester.But sweet for fish oil three esters directly destroy and obtain ethyl ester by the method, do not have using value to Rice oil enzyme process esterification technique.

CN101319167A discloses a kind of technique of high-acid value rice bran oil esterification depickling.The method, mainly through the grease that comes unstuck, decolours is carried out esterification under the catalysis of zinc oxide or zinc, obtains the low acid value Rice pollard oil that acid number is 5-7mgKOH/g.But the method temperature of reaction is high, and there is the risk of metallic pollution.

CN101824364A discloses a kind of enzyme process method for acid stripping and refining of peracid value fish oil.Fish oil free fatty acid, by adding methyl alcohol, ethanol etc. by immobilization packed bed enzyme reactor in peracid value fish oil, is changed into ethyl ester, then carries out the technique of alkali refining washing and drying by the method.But the easy inactivation of the zymin of this technique, and ethyl ester can lose in follow-up refining process, needs individual curing.

Although have the technique some patents disclosing chemical esterification depickling and enzyme process esterification deacidification at present, these methods are that the exploration of high acid value grease raising yield serves positive effect.But these methods are as comparatively large on oil quality impact in chemical method, and enzyme process is then still confined to testing laboratory's rank, there is long reaction time, the problems such as low conversion rate.

Summary of the invention

First aspect of the present invention is a kind of method providing enzyme process esterification treatment grease, wherein, described enzyme process esterification treatment grease is the mixture using lipase treatment grease and glycerine, and described method is the one or more steps before enzyme process esterification or in comprising the following steps in enzyme process esterification process:

A) the particle diameter <15 micron of described mixture is controlled, preferred <1000 nanometer; Preferably, described mixture through high speed shear process, preferably, described high speed shear for be not less than 10m/s, mixture described in the VELOCITY SHEAR being preferably not less than 20m/s;

B) mixture described in alcohol wash, preferably, use ethanol, methyl alcohol, Virahol or above-mentioned alcohol-water solution to wash described mixture, preferably, the determining alcohol of described alcohol-water solution is 20% ~ 80%;

C) in described mixture, add silicone oil, preferred silicone oil is polydimethylsiloxane, cyclomethicone and/or siloxanes ether copolymers, preferably, with the weighing scale of described mixture, described silicone oil is 0.1ppm ~ 500ppm, preferred 0.1-50ppm, more preferably 1-30ppm;

D) before enzyme process esterification treatment or in treating processes, the alcohol that carbonatoms is C1-C4 and/or low boiling point organic solvent is added in described mixture, preferred alcohol is ethanol, methyl alcohol and/or propyl alcohol, preferred low boiling point organic solvent is normal hexane, hexanaphthene, iso-pentane, Skellysolve A, pentamethylene, sherwood oil, ether, propyl ether, benzene, chloroform, acetone and/or ethyl acetate, preferably, with the weighing scale of described mixture, described alcohol is 4-10%, is preferably 7-8%; Preferably, with the weighing scale of described mixture, described low boiling point organic solvent is 50-500%, is preferably 200-400%;

E) in enzyme process esterification treatment process, be filled with in the reaction system of described mixture and enzyme not with or the gas that substantially do not react with the component of reaction system, and control reaction system in vacuum reaction, preferred described vacuum reaction is in vacuum tightness <500mbar, preferred vacuum tightness <50mbar reaction, preferably, described gas is nitrogen or rare gas element;

Described lipase is preferably CALB, Lipozyme RM IM, Lipozyme TL IM, Novo435, Lipase AP15, LipasePS, Lipase AK, Lipase A6, Lipase F, Lipase AY30, Lipase G80 and/or Lipase M-10.

In one embodiment of the invention, the mixture of described enzyme process esterification treatment grease and glycerine is the mixture using lipase treatment grease and glycerine, be preferably the lipase using immobilized lipase or mix with silica gel, be more preferably the mixture of immobilized lipase ferment treatment grease and the glycerine mixed with silica gel; Described lipase is preferably CALB, Lipozyme RM IM, Lipozyme TL IM, Novo435, Lipase AP15, Lipase PS, Lipase AK, Lipase A6, Lipase F, Lipase AY30, Lipase G80 and/or Lipase M-10.

Second aspect of the present invention is a kind of method providing enzyme process esterification treatment grease, wherein, described enzyme process esterification treatment grease is the mixture using lipase and Phospholipid hydrolase process grease and glycerine, preferably, in described mixture, water-content is lower than 10%, and preferably, in described mixture, moisture content is lower than 6%, preferred, in described reaction system, moisture content is 0.51%-5.01%;

Described lipase is preferably CALB, Lipozyme RM IM, Lipozyme TL IM, Novo435, Lipase AP15, LipasePS, Lipase AK, Lipase A6, Lipase F, Lipase AY30, Lipase G80 and/or Lipase M-10; Described Phospholipid hydrolase is preferably phospholipase A1, Phospholipase A2, Phospholipase C and/or Phospholipid hydrolase enzyme D.

In one embodiment of the invention, use in the process of the mixture of lipase treatment grease and glycerine, in described mixture, add Phospholipid hydrolase, described Phospholipid hydrolase is preferably phospholipase A1, Phospholipase A2, Phospholipase C and/or Phospholipid hydrolase enzyme D.

In an embodiment in first of the present invention or in second, described mixture carries out enzyme process esterification in the equipment for enzyme process esterification treatment grease, preferably, described equipment comprises the lipase mixed with silica gel, is preferably immobilized lipase;

Preferably, the described lipase mixed with silica gel is positioned in stacked filter screen, and preferably, in described stacked filter screen, the thickness of every layer of described lipase is 15-25mm;

Preferably, described stacked filter screen is provided with screen cloth to tackle immobilized enzyme particle, and preferably, described screen cloth can tackle 90%, and preferably 95%, more preferably 98%, the more preferably immobilized enzyme particle of more than 99%; Preferred mesh size is not less than 1mm, is more preferably not less than 0.075mm;

Preferably, described screen bottom is cross or rice font ruggedized construction;

Preferably, described stacked filter screen is arranged in enzyme process reactor c;

In an embodiment in first of the present invention or in second, described equipment comprises:

Stock and adjunct opening for feed a: the introducing port comprising grease and/or Auxiliary Liquid Material, introducing port is provided with spray dispersing head, and so that mixed raw material and auxiliary material are sent into enzyme process reactor c, preferably, described spray dispersing head is positioned at the top of enzyme process reactor c; Preferably, described stock and adjunct opening for feed a is connected with heating unit, so that the mixed raw material and auxiliary material of sending into enzyme process reactor c are heated to suitable temperature;

Enzyme process reactor c: be placed with the above-mentioned lipase mixed with silica gel in described enzyme process reactor c; Preferably, described enzyme process reactor c is connected with temperature regulating device, to control the temperature of reaction of oil sample; Described enzyme process reactor c is connected with dewatering system d;

Dewatering system d, preferably, described dewatering system d is the filling system with spray: the top of the described filling system with spray is packing layer, and described packing layer preferably adopts Raschig ring, Stainless Steel Cloth or Pall ring; The bottom of the described filling system with spray is furnished with pump, dehydration cycle is carried out so that the oil sample entering bottom is sprayed to top packing layer, preferably, described pump is recycle pump, impeller pump, peristaltic pump, preferably, also heating unit is furnished with, with reacting by heating oil sample in the bottom of the filling system with spray; With

Vacuum system g: described vacuum system g is connected with described enzyme process reactor c, described dewatering system d respectively, and to provide vacuum environment, preferably, described vacuum system g is 1 grade or multi-stage vacuum system;

Preferably, described equipment also comprises shears dispersion system e: described shearing dispersion system e for oil sample being carried out shearing dispersion, preferably, described shearing dispersion system e is frequency conversion high shear force tubular type shearing device, end dress formula high-shearing dispersion emulsifying machine or clarifixator; Preferably, described shearing dispersion system e is respectively equipped with oil outlet and thief hole, is respectively used to fuel-displaced and sampling; Preferably, described shearing dispersion system e is provided with heat sink, to reduce oil sample temperature; Preferably, described vacuum system g is connected with described shearing dispersion system e, to provide vacuum environment;

Preferably, described dewatering system d is provided with buffer tank, to store the grease through processed.

In an embodiment in first of the present invention or in second, described grease is animal grease and/or Vegetable oil lipoprotein, preferred Vegetable oil lipoprotein is Rice oil, sunflower seed oil, plam oil, palm-kernel oil, peanut oil, rapeseed oil, soybean oil, linseed oil, Oleum Gossypii semen, safflower oil, Purple Perilla Seed Oil, tea-seed oil, Castor oil, jojoba oil, sweet oil, oleum theobromatis, tallowseed oil, almond oil, Prunus amygdalus oil, bancoul nuts oil, rubber seed oil, maize germ, wheat germ oil, sesame seed oil, seed of Radix Oenotherae erythrosepalae oil, hazelnut oil, Semen Cucurbitae oil, Walnut oil., raisin seed oil, linseed oil, borage seed oil, Seabuckthorm Seed Oil, tomato seed oil, macadimia nut oil, one or more in Oleum Cocois, preferred animal grease is tallow, lard, sheep oil, chicken fat, fish oil, seal oil, whale oil, porpoise oil, oyster sauce, one or more in lanolin.

3rd aspect of the present invention is to provide the polished fat using the above-mentioned method stated to prepare.

In one embodiment of the invention, described polished fat is also through decolouring and/or deodorization process, and preferably, described polished fat is also through alkali refining process.

Accompanying drawing explanation

Fig. 1 shows the schematic diagram of a preferred version of sequential enzyme method esterification of the present invention or transesterify device structure.

Fig. 2 shows the schematic diagram of another preferred version of sequential enzyme method esterification of the present invention or transesterify device structure.

Embodiment

Below in conjunction with specific embodiment, the invention will be further described.Should be understood that following examples only for illustration of the present invention but not for limiting scope of the present invention.

In the present invention, if do not illustrated especially, percentage ratio (%) or part all refer to weight percentage relative to composition or weight part.

In the present invention, term " Rice oil " and " Rice pollard oil " can be used alternatingly, and refer to the grease produced by rice bran.In the present invention, the Rice oil that can be used for enzyme process esterification includes but not limited to: rice bran crude oil, the Rice pollard oil that comes unstuck, dewaxing Rice pollard oil, the dewaxing dry rice oil extracted from rice husks that comes unstuck, alkali refining Rice pollard oil, decolouring Rice pollard oil, deodorization Rice pollard oil.Wherein, " enzyme process esterification " refers to: under the effect of catalyzer enzyme, lipid acid and acyl acceptor (including but not limited to glycerine, Tegin 55G, triglyceride) is reacted and changes into glyceryl ester.In the present invention, enzyme for " enzyme process esterification " is generally esterase or lipase, specifically, CALB, LipozymeRM IM, Lipozyme TL IM, Novo435, Lipase AP15, Lipase PS, Lipase AK, Lipase A6, Lipase F, Lipase AY30, Lipase G80, Lipase M-10 can be included but not limited to, described enzyme can be immobilized enzyme or liquid enzymes, is preferably immobilized enzyme.The enzyme added is generally the 0.01-20% of grease weight, preferred 0.5-10%.

" come unstuck " and refer to: Applied Physics, chemistry or biological method remove the process of peptized impurities in grease; " dewaxing " refers to: apply the process that certain technique means deviates from wax in grease." drying " refers to: adopt certain technique means to deviate from the process of moisture in grease." alkali refining " refers to: adopt the method for chemistry, biology or physics remove or partly deviate from the process of lipid acid." decolouring " refers to: adopt the method for absorption to remove the process of pigment in grease." deodorization " refers to: adopt certain method to deviate from the process of stink in grease.The process of described " coming unstuck ", " dewaxing ", " drying ", " alkali refining ", " deodorization ", " decolouring " is known by those skilled in the art, and its concrete grammar and parameter can adopt the ordinary method of this area to carry out." come unstuck " and can be, but not limited to adopt the method that hydration degum, enzymatic degumming, alkali refining come unstuck to carry out, " dewaxing " can be, but not limited to adopt the method for ordinary method, solvent method, tensio-active agent to carry out, and " drying " can be, but not limited to adopt vacuum drying method to carry out." alkali refining " can be, but not limited to the method for liquid-liquid extraction, alkali refining method." decolouring " can be, but not limited to the method adopting absorption." deodorization " can be, but not limited to adopt the method for wet distillation to carry out.When carrying out above-mentioned process, those skilled in the art also can adjust according to actual carrying out and change, and the method for adjustment is known by those skilled in the art.

In the present invention, " alcohol wash " refers to: after being mixed with alcohols by grease, then removes the technique of alcohol phase.The alcohol that can be used for " alcohol wash " is the alcohol of carbonatoms 1 ~ 4 or the mixing solutions of alcohol and water, include but not limited to: the methyl alcohol of the ethanol of 20-80%, the Virahol of 20-80%, 20-80%, the alcohol that the mutual solubility of preferred use and grease is less, such as, solubleness is adopted to be less than 10%, preferably be less than 5%, be more preferably less than 2%, be most preferably less than the alcoholic solvent of 1%.In one embodiment of the invention, the mixing solutions of alcohol or alcohol and water and the volume ratio of Rice oil to be washed are 0.1-10:1, are preferably 1-3:1.In one embodiment of the invention, " alcohol wash " temperature is 10-50 DEG C, preferred 20-30 DEG C.

In the present invention, " alcohol wash " comprises and alcohol or alcohol being mixed with Rice oil to be washed with the mixing solutions of water, and mixture separation is obtained the step of Rice oil after alcohol wash, further comprises the step of Rice oil after dry alcohol wash.Wherein, alcohol or alcohol and water mixing solutions and Rice oil to be washed by but be not limited to stir, shear and mix.The mixture obtained by but be not limited to natural subsidence, centrifugal settling is separated.After alcohol wash Rice oil by but be not limited to vacuum-drying, air lift carries out drying.The actual conditions of aforesaid method is for those skilled in the art is known or adjusted by limited experimentation.

In the present invention, " silicone oil " refers to: the siloxane bond combined by Siliciumatom and Sauerstoffatom is main framing, Siliciumatom is connected with the polymkeric substance of the organic radicals such as methyl, " silicone oil " used in the present invention includes but not limited to as polydimethylsiloxane (such as viscosity is the polydimethylsiloxane of 50cSt ~ 1000cSt) and derivative thereof, cyclomethicone and derivative thereof, siloxanes ether copolymers.In the present invention, the silicone oil be added in Rice oil is 0.1-500ppm, preferred 0.1-50ppm.Add silicone oil in Rice oil after, by but be not limited to the method process such as shearing, homogeneous, stirring, fully mix with silicone oil to make Rice oil.

In the present invention, " vacuum " refers to: in given space, and pressure is lower than the gaseous phase of 101325 pascals (Pa), and " vacuum tightness " refers to: the subatmospheric degree of pressure in system, generally represents with Pa.In the present invention, vacuum pump evacuation refers to dry screw vacuum pump, water-ring pump, reciprocation pump, slide valve pump, sliding vane rotary pump, lobe pump and diffusion pump etc. makes the pounds per square inch absolute (psia) of reaction system be 1-500mbar, preferred 1-50mbar, more preferably 1-10mbar.

In the present invention, before enzyme process esterification or the organic solvent being added to Rice oil in enzyme process esterification reaction process include but not limited to: the alcohol (including but not limited to ethanol, methyl alcohol, propyl alcohol) of normal hexane, C1-C4, hexanaphthene, iso-pentane, Skellysolve A, pentamethylene, sherwood oil, ether, propyl ether, benzene, chloroform, acetone, ethyl acetate etc.Described organic solvent can disposablely add, add in batches or add continuously (such as dripping), in Rice oil, preferably adds in batches or adds continuously, is more preferably added drop-wise in Rice oil.With Rice oil volumeter, the organic solvent added is 50-500%, is preferably 200-400%.In one embodiment of the invention, the speed that organic solvent is added to Rice oil is 0.1-2ml/min/100g Rice oil, is preferably 0.56-1.12ml/min/100g Rice oil.

In the present invention, before adding enzyme, Rice pollard oil and glycerol mixture can be sheared, with obtain dispersion particle diameter be less than 30 microns, be preferably less than 15 microns, be more preferably less than 1000nm, Rice pollard oil and glycerol mixture.Preferably carry out mega-shear.In the present invention, described mega-shear is the linear velocity > 10m/s sheared, preferred > 20m/s, more preferably > 25m/s.In the present invention, the mega-shear time is 0-30min, is preferably 10-15min.

In one embodiment of the invention, at maintenance vacuum tightness < 500mbar, while preferred < 50mbar, be filled with in reactant not with or substantially not aitiogenic with the material in reaction system gas.In one embodiment of the invention, described gas includes but not limited to nitrogen and the rare gas element such as helium, argon gas.In one embodiment of the invention, described gas adds by bottom reactant.

In one embodiment of the invention, add lipase and Phospholipid hydrolase carries out catalysis in Rice oil, preferably, in described reaction system, moisture content is 0-10% simultaneously, is preferably 0.51-5.01%.In one embodiment of the invention, discuss the lipase mentioned before the lipase of use can include but not limited to, described enzyme can be immobilized enzyme or liquid enzymes, preferably immobilized enzyme.The enzyme added is generally the 0-20% of grease weight, preferred 0.01-10%.In one embodiment of the invention, the Phospholipid hydrolase of use can include but not limited to phospholipase A1, Phospholipase A2, Phospholipase C and/or Phospholipid hydrolase enzyme D, and described enzyme can be immobilized enzyme or liquid enzymes, is preferably liquid enzymes.The enzyme added is generally the 0-10% of grease weight, preferred 0.01-5%.In the present invention, can by alcohol wash, add silicone oil, mega-shear, be filled with not with or substantially not with the aitiogenic gas of the material in reaction system (such as but not limited to nitrogen and/or rare gas element) with add organic solvent (such as but not limited to normal hexane, ethanol) etc. method combine, such as adopt 2 kinds wherein simultaneously, 3 kinds, 4 kinds or 5 kinds, specifically, such as can carry out following operation: alcohol wash and interpolation silicone oil simultaneously, or alcohol wash and mega-shear, or alcohol wash and be filled with not with or substantially not aitiogenic with the material in reaction system gas, or alcohol wash and interpolation organic solvent, or add silicone oil and mega-shear, or add silicone oil and be filled with not with or substantially not aitiogenic with the material in reaction system gas, or add silicone oil interpolation organic solvent, or mega-shear and be filled with not with or substantially not aitiogenic with the material in reaction system gas, or mega-shear and interpolation organic solvent, be filled with not with or substantially not with the aitiogenic gas of the material in reaction system and add organic solvent, or alcohol wash, add silicone oil and mega-shear, or alcohol wash, add silicone oil and be filled with not with or substantially not aitiogenic with the material in reaction system gas, or alcohol wash, add silicone oil and add organic solvent, or alcohol wash, mega-shear and be filled with not with or substantially not aitiogenic with the material in reaction system gas, or alcohol wash, mega-shear and interpolation organic solvent, or alcohol wash, be filled with not with or substantially not with the aitiogenic gas of the material in reaction system and add organic solvent, or interpolation silicone oil, mega-shear and be filled with not with or substantially not aitiogenic with the material in reaction system gas, or interpolation silicone oil, mega-shear and interpolation organic solvent, or interpolation silicone oil, be filled with not with or substantially not with the aitiogenic gas of the material in reaction system and add organic solvent, or mega-shear, be filled with not with or substantially not with the aitiogenic gas of the material in reaction system and add organic solvent, or interpolation silicone oil, mega-shear, be filled with not with or substantially not with the aitiogenic gas of the material in reaction system and add organic solvent, or alcohol wash, mega-shear, be filled with not with or substantially not with the aitiogenic gas of the material in reaction system and add organic solvent, or alcohol wash, add silicone oil, be filled with not with or substantially not with the aitiogenic gas of the material in reaction system and add organic solvent, or alcohol wash, add silicone oil, mega-shear, with interpolation organic solvent, or alcohol wash, add silicone oil, mega-shear, with be filled with not with or substantially not aitiogenic with the material in reaction system gas, or alcohol wash, interpolation silicone oil, mega-shear, be filled with not with or substantially not with the aitiogenic gas of the material in reaction system with add organic solvent.In the present invention, alcohol wash, add silicone oil, mega-shear, be filled with not with or substantially can also not react in sequential enzyme method esterification or transesterify equipment alone or in combination with the aitiogenic gas of the material in reaction system (such as but not limited to nitrogen or rare gas element) and the method for adding organic solvent (such as but not limited to normal hexane, ethanol).In the present invention, when using aforesaid method to carry out enzyme process esterification, can be used alone lipase or use lipase and Phospholipid hydrolase simultaneously, the lipase of use includes but not limited to: CALB, Lipozyme RM IM, Lipozyme TL IM, Novo435, Lipase AP15, Lipase PS, Lipase AK, Lipase A6, Lipase F, Lipase AY30, Lipase G80, Lipase M-10; The Phospholipid hydrolase used includes but not limited to: phospholipase A1, Phospholipase A2, Phospholipase C, Phospholipase D.

In the present invention, " low boiling point organic solvent " refers to: under 101kPa pressure, and boiling point is lower than the organic solvent of 100 DEG C.Specifically, " low boiling point organic solvent " includes but not limited to: normal hexane, hexanaphthene, iso-pentane, Skellysolve A, pentamethylene, sherwood oil, ether, propyl ether, benzene, chloroform, acetone, ethyl acetate, methyl alcohol, ethanol, propyl alcohol etc.

The rice bran crude oil (hair Rice oil) used in following embodiment of the present invention, Rice oil of coming unstuck, dewaxing Rice oil of coming unstuck, come unstuck dewaxing drying of rice rice bran oil: all purchased from Qinhuangdao Jinhai Grain & Oil Industry Co., Ltd..PLA1 enzyme (phospholipase A1) is purchased from letter China Investment Ltd. of Novi.

In following embodiment of the present invention, the detection method of employing is:

Phosphorus content: GB/T5537-2008 " mensuration of grain and oil detection phospholipids content "

Acid number: GB/T5530-2005 " animal-plant oil acid number and acid test "

DAG content: AOCS Official Method Cd11d-96

Esterification yield: in following embodiment of the present invention, esterification yield method of calculation are:

AVOIAVI

Esterification yield × 100%

Wherein, AV0 is AV before esterification; AV1 is AV after esterification.

Thiaminogen content: CODEX STAN210-1999.5.20Determination of gamma oryzanol content.

Total sterol content: ISO12228 (1999) Animal and vegetable fats and oils-Determination of individual andtotal sterols contents – Gas chromatographic method, ISO standard.

In following embodiment of the present invention, the mega-shear equipment of use is: fluko mega-shear suite of equipment, model FISCO-1.5L, purchased from: Shanghai Fu Luke company limited.

In following embodiment of the present invention, Novozym435 is a kind of lipase obtained by lipase B Candida antarctic, purchased from Xin Zhong Co., Ltd of Novi.

As shown in Figure 1, the sequential enzyme method esterification used in embodiments of the invention 30 ~ embodiment 37 or transesterify device structure comprise:

1, stock and adjunct opening for feed a: the introducing port comprising grease and/or Auxiliary Liquid Material (both can use same introducing port to import grease and auxiliary material, also different introducing port can be adopted to import grease and auxiliary material respectively), introducing port is provided with spray dispersing head, so that mixed raw material and auxiliary material are sent into enzyme process reactor c, preferably, described spray dispersing head is positioned at the top of enzyme process reactor c; Preferably, described stock and adjunct opening for feed a is connected with heating unit, so that the mixed raw material and auxiliary material of sending into enzyme process reactor c are heated to suitable temperature;

2, enzyme process reactor c: placed layer stacked filter screen in enzyme process reactor c.Enzyme is placed in stacked filter net device, and the interpolation thickness of every layer of enzyme is preferably 15-25mm.The stacked filter screen of immobilized enzyme having screen cloth to tackle in enzyme process reactor c, preferably, described screen cloth can tackle 90%, preferably 95%, more preferably 98%, the more preferably immobilized enzyme particle of more than 99%, preferred mesh size is not less than 1mm, more preferably be not less than 0.075mm, screen bottom is preferably cross or rice font ruggedized construction; Enzyme process reactor c is connected with the filling system d sprayed; Preferably, enzyme process reactor c is connected with temperature regulating device, to control the temperature of oil sample reaction;

3, with the filling system d of spray: top is packing layer, packing layer adopts Raschig ring or Stainless Steel Cloth or Pall ring; Bottom is furnished with pump, carry out dehydration cycle so that the oil sample entering bottom is sprayed to top packing layer, the pump wherein used can be, but not limited to as recycle pump, impeller pump, peristaltic pump, preferably, also heating unit is furnished with, with reacting by heating oil sample in the bottom of filling system d; Oil sample through the filling system d process with spray is sent into and is sheared dispersion system e;

4, shearing dispersion system e: for oil sample being carried out shearing dispersion, preferably, frequency conversion high shear force tubular type shearing device, end dress formula high-shearing dispersion emulsifying machine or clarifixator can be adopted; Shear dispersion system e and be respectively equipped with oil outlet and thief hole, be respectively used to fuel-displaced and sampling; Preferably, shear dispersion system e and be provided with heat sink, to reduce oil sample temperature;

5, vacuum system g: respectively with enzyme process reactor c, with the filling system d of spray, be connected with buffer tank f, to provide vacuum environment, preferably, 1 grade or multi-stage vacuum system is used, such as 2 grades of vacuum systems, when use 2 grades of vacuum systems, first step vacuum system can be, but not limited to use water ring vacuum pump, ejector vacuum pump or vacuum diaphragm pump, and the 2nd grade of vacuum system can be, but not limited to use mechanical scraping blade pump, lobe pump or diffusion pump.

In sequential enzyme method esterification or transesterify equipment, the equipment that interchanger connects needs cooling respectively and heats up can be used, to carry out heat exchange, thus to oil sample heating or cooling, such as, interchanger b can be used to connect stock and adjunct opening for feed a and enzyme process reactor c, interchanger b also can be used to connect with the filling system d sprayed and shear dispersion system e.The interchanger used can be, but not limited to as plate-type heat exchanger, shell and tube heat exchanger, spiral-plate exchanger.

In sequential enzyme method esterification or transesterify equipment, can using enzyme process reactor c, with spray filling system d, shear dispersion system e as subsystem UNIT1, access in sequential enzyme method esterification or transesterify equipment, for the further enzyme process esterification of grease or transesterification reaction; Also shearing dispersion system e can be connected with enzyme process reactor c, the reaction grease through shearing dispersion system e process be entered in enzyme process reactor c again and reacts.

As shown in Figure 2, in sequential enzyme method esterification or transesterify equipment, also can add buffer tank f, buffer tank f respectively with the filling system d sprayed with shear dispersion system e and be connected, for storing the oil plant after the filling system d process with spray, and by the oil plant of surge tank f, enter shearing dispersion system e and carry out shearing dispersion.Now, can using enzyme process reactor c, with spray filling system d, buffer tank f, shear dispersion system e as subsystem UNIT2, in access sequential enzyme method esterification or transesterify equipment, for the further enzyme process esterification of grease or transesterification reaction; Maybe will shear dispersion system e to be connected with enzyme process reactor c, and the reaction grease through shearing dispersion system e process be entered in enzyme process reactor c again and reacts.

In sequential enzyme method esterification or transesterify equipment, can carry out connecting or side by side by subsystem UNIT1 and/or subsystem UNIT2, for enzyme process esterification or the transesterification reaction of grease.

Embodiment 1, the Rice oil of dispersion particle diameter below 1000 nanometers and glycerol mixture enzyme process esterification

Get 1000g to come unstuck Rice oil and the mixing of 20g glycerine, carry out shear-mixed 20min, controlling shear line speed is 25m/s.Get 50 grams of samples, leave standstill after 24 hours, detect glycerine particle diameter by polarizing microscope, result is as shown in table 1.

Rice oil of coming unstuck after pre-treatment being sheared is heated to 70 DEG C, adds 47.5g immobilized enzyme preparation NOVOZYM435, in 75 DEG C of reaction 8h, in reaction process, uses vacuum system to vacuumize, to maintain vacuum tightness < 10mbar.Sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collect upper oil phase and survey acid number, detect the acid number of the different sampling spot samples obtained, result is as shown in table 1.

Embodiment 2 disperses particle diameter in the Rice oil of 5-15 micron and glycerol mixture enzyme process esterification

Rice oil of being come unstuck by 1000g and the mixing of 20g glycerine, carry out shear-mixed 5min, controlling shear line speed is 20m/s, obtains the Rice oil sample that comes unstuck after pre-treatment shearing.Get 50 grams of samples, leave standstill after 24 hours, detect glycerine particle diameter by polarizing microscope, result is as shown in table 1.

The Rice oil sample that comes unstuck after pre-treatment being sheared is heated to 70 DEG C, adds 47.5g immobilized enzyme preparation NOVOZYM435, in 75 DEG C of reaction 8h, time in reaction process, uses vacuum system vacuum, to maintain vacuum tightness < 10mbar.Sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collect upper oil phase and survey acid number, detect the acid number of the different sampling spot samples obtained, result is as shown in table 1.

Comparative example 1, common shear-mixed

Take 1000g to come unstuck Rice oil sample, add 20g glycerine, shear 3min, get 50 grams of samples in 10000rpm, leave standstill after 24 hours, detect glycerine particle diameter by polarizing microscope, result is as shown in table 1;

Add 47.5g immobilized enzyme preparation NOVOZYM435, in 75 DEG C of reaction 8h, when reacting, use vacuum pump evacuation, to maintain vacuum tightness < 10mbar, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collect upper oil phase and survey acid number, detect the acid number of the different sampling spot samples obtained, result is as shown in table 1.

Table 1, different degree of scatter are on the impact of enzyme process esterification yield

According to table 1 result, after grease and glycerine fully disperse pre-treatment, particle diameter diminishes, and the reaction times of esterification deacidification can effectively shorten.Particularly as particle diameter <1000nm, the reaction times of esterification deacidification shortens obviously.

Embodiment 3, fill and add the impact of nitrogen on Rice oil esterification yield

Take 1000g to come unstuck Rice oil sample, be heated to 75 DEG C, add 20g glycerine, shear 3min in 10000rpm; Add 50g immobilized enzyme preparation NovoZYM435, in 75 DEG C of reaction 8h.In reaction process, be filled with nitrogen by bottom reactant, and regulate its flow velocity, use vacuum pump evacuation simultaneously, to maintain vacuum tightness < 10mbar.Sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collect upper oil phase and survey acid number, DAG content, and calculate esterification yield, result is as shown in table 2.

Embodiment 4, fill nitrogen technique to reaction enzymes preparation access times

Take 1000g to come unstuck Rice oil sample, be heated to 75 DEG C, add 20g glycerine, shear 3min in 10000rpm; Add 50g immobilized enzyme preparation NovoZYM435, in 75 DEG C of reaction 8h.In reaction process, be filled with nitrogen by bottom reactant, and regulate its flow velocity, use vacuum pump evacuation simultaneously, to maintain vacuum tightness < 10mbar.After reaction terminates, suction filtration obtains oil sample and NOVOZYM435 zymin, and oil sample is used for measuring AV, and after zymin gathers, continue reaction 8h according to aforesaid operations method, so repeat, test-results is as shown in table 3.

Comparative example 2, do not fill and add nitrogen reaction enzymes preparation access times

According to the test method sustained reaction 8h of comparative example 1, after reaction terminates, suction filtration obtains oil sample and NOVOZYM435 zymin, oil sample is used for measuring AV, by the zymin of collecting, continues reaction 8h according to aforesaid operations method, reaction repeated 3 times, experimental result is in table 3.

Comparative example 3,

Take 1000g to come unstuck Rice oil sample, be heated to 75 DEG C, add 20g glycerine, shear 3min in 10000rpm; Add 50g immobilized enzyme preparation NovoZYM435, in 75 DEG C of reaction 8h.In reaction process, be filled with nitrogen by bottom reactant, and maintain normal pressure (>1atom).Sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collect upper oil phase and survey acid number, DAG content, and calculate esterification yield, result is as shown in table 4.

Table 2, fill nitrogen embodiment and do not fill nitrogen comparative example esterification yield and contrast

	Embodiment 3	Comparative example 1
			Nitrogen	Fill and add nitrogen	Do not fill and add nitrogen
Grease	To come unstuck Rice oil	To come unstuck Rice oil
			% enzyme	2%NOVOZYM435	2%NOVOZYM435
% glycerine	2	2
			Temperature	75	75
Vacuum	＜10mbar	＜10mbar
			Acid number (mgKOH/g)
0h	28.34	28.31
			2h	7.10	17.45
4h	3.84	14.93
			6h	2.58	9.12
Esterification yield % during 8h	90.09	67.79
			8h reacts DAG content %	13.26	16.24

Table 3, fill nitrogen and do not fill nitrogen technological test number of times and compare

	Embodiment 4	Comparative example 2
			Nitrogen	Fill and add nitrogen	Do not fill and add nitrogen
Grease	To come unstuck Rice oil	To come unstuck Rice oil
			% enzyme	5%NOVOZYM435	5%NOVOZYM435
% glycerine	2	2
			Temperature	75	75
Vacuum	＜10mbar	＜10mbar

Access times
			Initial AV	28.31	28.31
1 stThe AV of 8h	3.11	9.12
			2 ndThe AV of 8h	5.01	11.72
3 rdThe AV of 8h	4.33	14.07

Table 4,

	Embodiment 3	Comparative example 3
			Nitrogen	Fill and add nitrogen	Fill and add nitrogen
Grease	To come unstuck Rice oil	To come unstuck Rice oil
			% enzyme	5%NOVOZYM435	5%NOVOZYM435
% glycerine	2	2
			Temperature	75	75
Vacuum	＜10mbar	>1atom
			Acid number (mgKOH/g)
0h	28.34	28.34
			2h	7.10	25.00
4h	3.84	24.76
			6h	2.58	24.95
Esterification yield % during 6h	90.09	11.96

According to the result of table 2-4, fill from bottom while esterification vacuumizes and add nitrogen, can esterifying efficiency be improved, and the access times of zymin can be increased and reduce the last DAG generated.

Comparative example 4 is come unstuck, the Rice pollard oil that dewaxes is for enzyme process esterification

Take come unstuck, dewax, dry after Rice pollard oil 40g, add 0.60g glycerine, 10000rpm shears 3min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, vacuum tightness < 10mbar, reaction 6h, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collect upper oil phase and measure AV change, and calculate esterification yield, result is as shown in table 5.

Table 5

Reaction times	AV	Esterification yield
			0h	27.46	---
2h	10.19	62.89%
			4h	6.99	74.54%
6h	4.98	81.86%

Rice pollard oil after the washing of embodiment 5,60% aqueous ethanolic solution is used for enzyme process esterification

Get come unstuck, dewax after Rice pollard oil oil sample 60g, add 60g aqueous ethanolic solution (60%), vibration 3min; In the centrifugal 2min of 3000g, collect oil phase; In 105 DEG C, 50mbar, dry 3min, obtain the Rice pollard oil after alcohol wash.

Detect the acid number (AV) of the Rice pollard oil after alcohol wash, peroxide value (PV) and anisidine value (PAV), result is as shown in table 6.

Rice pollard oil quality after table 6, alcohol wash

Sample	AV/mg/g	PV/meq/kg	PAV
				Rice pollard oil after alcohol wash	26.90	5.0	53.5

Get Rice pollard oil 40g after alcohol wash, add 0.60g glycerine, 10000rpm shears 3min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, vacuum tightness 1mbar, reaction 6h, every sampling in 2 hours 1 time, measure AV change, and calculate esterification yield, result is as shown in table 7.

Table 7 esterification time is on the impact of fat A V and composition thereof

Reaction times	AV	Esterification yield
			0h	26.90	---
2h	6.73	74.98%
			4h	3.32	87.66%
6h	2.03	92.45%

Embodiment 6 different concentration ethanol solution washing is on the impact of fat A V

Use 20%, 40%, 60%, 80%, 100% aqueous ethanolic solution alcohol wash to come unstuck respectively, dewax after Rice pollard oil sample, obtain 20% alcohol wash sample, 40% alcohol wash sample, 60% alcohol wash sample, 80% alcohol wash sample, 100% alcohol wash sample, detailed process is as follows:

Get come unstuck, dewax after each 60g of Rice pollard oil oil sample, add the above-mentioned aqueous ethanolic solution of 60g respectively, vibration 3min; 3000g, centrifugal 2min, collect oil sample; In 105 DEG C, vacuum tightness 50mbar, dry 3min.

Detect the AV value of each alcohol wash sample, result is as shown in table 8.

Table 8 alcohol concn affects the AV of grease after alcohol wash

Sample	Before alcohol wash	20% alcohol wash	40% alcohol wash	60% alcohol wash	80% alcohol wash	100% alcohol wash
							AV mg/g	28.62	28.25	27.64	26.90	21.98	18.00

According to the result of table 8, the AV impact of alcohol concn on grease after washing is larger.Wherein with absolute ethanol washing 1 time, FFA loss is AV after AV-alcohol wash before 36.31%((alcohol wash) AV before/alcohol wash), and the loss of FFA can affect follow-up enzyme process esterification yield.Therefore, alcohol concn selects 20% ~ 60% to be advisable.

The enzyme process deacidification effect difference of embodiment 7 different concns alcohol wash sample

The Rice pollard oil sample of Rice pollard oil sample and non-alcohol wash after the alcohol wash that embodiment 6 is obtained, carry out enzyme process esterification experiment respectively, process is as follows:

Get each 40g of Rice pollard oil sample after alcohol wash, add 0.60g glycerine, 10000rpm shears 3min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, 1mbar, reaction 6h, every sampling in 2 hours 1 time, measure AV change, and calculate esterification yield, result is as shown in table 9.

The esterification yield difference of table 9, different concns alcohol wash sample

According to the result of table 9, the alcohol wash sample of each concentration ethanol all can significantly improve enzyme process esterification efficiency, and wherein the esterifying efficiency of 60% washing with alcohol sample is best, and after 6h esterification, esterification yield can reach 92.45%.In conjunction with the impact of washing with alcohol on FFA.Aqueous ethanolic solution concentration should be chosen as 20% ~ 80%.

Embodiment 8, enzyme process reaction time of esterification are on the impact of esterification yield

Get come unstuck, dewax, dry after Rice pollard oil 40g, add 0.60g glycerine, 10000rpm shears 3min; Add the lipase Novozym435 that oil weighs 5%; In 75 DEG C, vacuum tightness 1mbar, reaction 24h, respectively at sampling in 2,4,6,12,18 and 24 hours, measure AV change, and calculate esterification yield, result was as shown in table 10;

Table 10, enzymolysis time are on the impact of esterification yield

Enzymolysis time (h)	0	2	4	6	12	18	24
								Esterification yield (%)		65.06	75.49	82.56	88.01	90.44	94.58

According to the result of table 10, along with the prolongation in reaction times, esterification yield is in rising trend.Wherein front 6h enzyme process esterification is rapid, and after 6 hours, esterification rate obviously declines.The production efficiency considered and the impact of production cost, the preferred reaction time is 2h ~ 12h.

Embodiment 9 enzyme addition is on the impact of deacidification effect

Get come unstuck, dewax, dry after Rice pollard oil 280g, add 4.27g glycerine, 10000rpm shears 3min; Be divided into 7 parts, add the lipase NOVOZYM435 that oil weighs 0.1%, 0.5%, 1%, 2%, 3%, 4%, 5% respectively; In 75 DEG C, vacuum tightness 1mbar, reaction 6h, measure AV change, result is as shown in table 11;

Table 11, enzyme concentration are on the impact of AV

Enzyme concentration

0.1%

0.5%

1%

2%

3%

4%

5%

AV（mg/g）

15.53

6.84

5.82

5.49

4.65

4.47

4.37

According to the result of table 11, along with the increase of enzyme concentration, the fat A V continuous decrease after depickling.After enzyme concentration > 3%, the AV range of decrease eases up, the cost of the lipase of consideration, and preferred enzyme concentration is 0.5% ~ 5%.

20ppm polydimethylsiloxane is added for enzyme process esterification in embodiment 10, Rice pollard oil

Get come unstuck, dewax, dried Rice pollard oil 40g, add 20ppm polydimethylsiloxane (100cSt), 10000rpm shears 3min: add 0.55g glycerine, and 10000rpm shears 3min; Add the lipase NOVOZYM 435 that oil weighs 5%; In 75 DEG C, vacuum tightness 1mbar, reaction 6h, every sampling in 2 hours 1 time, measure AV change, and calculate esterification yield, result is as shown in table 12;

Table 12, esterification time are on the impact of fat A V and esterification yield

Reaction times	AV	Esterification yield
			0h	25.11	---
2h	8.89	64.60%
			4h	4.86	80.65%
6h	3.09	87.69%

The addition of embodiment 11, polydimethylsiloxane is on the impact of esterification yield

Get respectively 6 parts come unstuck, dewax, each 40g of dried Rice pollard oil, add 0.1ppm, 1ppm, 10ppm, 20ppm, 30ppm, 50ppm polydimethylsiloxane (100cSt) respectively; 10000rpm shears each 3min of above-mentioned sample: add 0.55g glycerine respectively in above-mentioned oil sample, and 10000rpm shears 3min; Add the lipase NOVOZYM 435 that oil weighs 5%; In 75 DEG C, vacuum tightness 1mbar, reaction 6h, every sampling in 2 hours 1 time, measure AV change, and calculate esterification yield, use do not add the coming unstuck of polydimethylsiloxane, dewax, dried Rice pollard oil repeats above-mentioned use, in contrast, result is as shown in table 13.

Table 13 polydimethylsiloxane addition is on the impact of esterification yield

According to the result of table 13, adding polydimethylsiloxane can significantly improve esterifying efficiency, and its addition has certain promoter action when 0.1ppm ~ 50ppm to esterifying efficiency, and preferred addition is 1ppm ~ 30ppm.When wherein adding 10ppm, esterification yield is the highest.

Embodiment 12 different viscosity (polymerization degree) polydimethylsiloxane is on the impact of esterification yield

Get 5 parts come unstuck, dewax, each 40g of dried Rice pollard oil, add the polydimethylsiloxane that viscosity (polymerization degree) is respectively 50cSt, 100cSt, 350cSt, 500cSt, 1000cSt respectively, 10000rpm shears each 3min of above-mentioned sample: add 0.55g glycerine respectively, and 10000rpm shears 3min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, 1mbar, reaction 4h, every sampling in 2 hours 1 time, measure AV change, and calculate esterification yield, not adding the coming unstuck of polydimethylsiloxane, dewax, dried Rice pollard oil for contrasting, result is as shown in table 14;

Table 14, different viscosity polydimethylsiloxane are on the impact of esterification yield

According to the result of table 14, viscosity all can improve the reaction efficiency of enzyme process esterification at the polydimethylsiloxane of 50cSt ~ 1000cSt.

The dissimilar oil phase defoamer of embodiment 13 is on the impact of esterification yield

Get come unstuck, dewax, each 40g of dried Rice pollard oil, add silicone oil (100 cSt polydimethylsiloxanes, addition 20ppm) or mineral oil (whiteruss, addition 0.5wt%) respectively; 10000rpm shears each 3min of above-mentioned sample: add 0.55g glycerine respectively, and 10000rpm shears 3min; Add the lipase NOVOZYM 435 that oil weighs 5%; 75 DEG C, 1mbar, reaction 6h, every sampling in 2 hours 1 time, measure AV change, calculate esterification yield, not adding the coming unstuck of defoamer, dewax, dried Rice pollard oil (blank) is contrast, result is as shown in Table 15.

Table 15, dissimilar oil phase defoamer are on the impact of esterification yield

According to the result of table 15, silicone oil type defoamer has significant promoter action to enzyme process esterification, and mineral oil type antifoaming agent then can reduce the reaction efficiency of enzyme process esterification.

Comparative example 5

Get 50g to come unstuck dewaxing drying of rice rice bran oil, add 0.69g glycerine, under 10000-15000rpm, stir homogeneous 3min, material is mixed completely, then adds 100ml normal hexane, be warming up to 60 DEG C, add 2.5g immobilized lipase Novozym435,6h is reacted at ambient pressure, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm under stirring, 60 DEG C of conditions, collect upper oil phase and survey acid number, detect the acid number of the different sampling spot samples obtained, and calculate esterification yield, result is shown in table 16.

The acid value of table 16, different time points and esterification yield

Time (h)	0	2	4	6	8
						Acid value (mgKOH/g)	28.62	28.07	26.33	25.23	24.60
Esterification yield (%)	0.00	1.92	8.00	11.84	14.05

Embodiment 14

Get 50g to come unstuck dewaxing drying of rice rice bran oil, add 0.69g glycerine, under 10000-15000rpm, stir homogeneous 3min, material is mixed completely, then add the normal hexane of 100ml, add 2.5g immobilized lipase NOVOZYM435 after being warming up to 75 DEG C, react at vacuum tightness < 10mbar, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collects upper oil phase and surveys acid number, detect the acid number of the different sampling spot samples obtained, and calculating esterification yield, result is shown in table 17.

Table 17,

Time (h)	0	2	4	6
					Acid value (mgKOH/g)	28.62	14.68	11.18	8.01
Esterification yield (%)	0	48.71	68.97	74.98

Embodiment 15

Get 50g to come unstuck dewaxing drying of rice rice bran oil, add 0.69g glycerine, under 10000-15000rpm, stir homogeneous 3min, material is mixed completely.Be warming up to 75 DEG C, add 2.5g immobilized lipase Novozym435, speed with 0.56ml/min under vacuum tightness < 10mbar slowly adds normal hexane, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collects upper oil phase and surveys acid number, detect the acid number of the different sampling spot samples obtained, and calculating esterification yield, result is shown in table 18.

Table 18,

Time (h)	0	2	4	6
					Acid value (mgKOH/g)	28.62	13.40	10.69	6.38
Esterification yield (%)	0	53.18	62.65	77.68

Embodiment 16

Get 50g to come unstuck dewaxing drying of rice rice bran oil, add 0.69g glycerine, under 10000-15000rpm, stir homogeneous 3min material is mixed completely.Be warming up to 75 DEG C, add 2.5g immobilized lipase Novozym435, speed with 1.12ml/min under vacuum tightness < 10mbar slowly adds normal hexane, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collects upper oil phase and surveys acid number, detect the acid number of the different sampling spot samples obtained, and calculating esterification yield, result is shown in table 19.

Table 19,

Time (h)	0	2	4	6
					Acid value (mgKOH/g)	28.62	10.65	7.90	4.72
Esterification yield (%)	0.00	62.79	72.40	83.51

Embodiment 17

Get 50g to come unstuck dewaxing drying of rice rice bran oil, add 0.69g glycerine, under 10000-15000rpm, stir homogeneous 3min material is mixed completely.Be warming up to 75 DEG C, add 2.5g immobilized lipase Novozym435, sherwood oil (30-60) is slowly added with the speed of 1.12ml/min100g under vacuum tightness < 10mbar, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collects upper oil phase and surveys acid number, detect the acid number of the different sampling spot samples obtained, and calculating esterification yield, result is shown in table 20.

Table 20,

Time (h)	0	2	4	6
					Acid value (mgKOH/g)	28.62	9.32	6.47	4.09
Esterification yield (%)	0.00	64.55	77.47	85.76

Embodiment 18

Get 50g to come unstuck dewaxing drying of rice rice bran oil, add 0.69g glycerine, under 10000-15000rpm, stir homogeneous 3min material is mixed completely.Be warming up to 75 DEG C, add 2.5g immobilized lipase Novozym435, speed with 1.12ml/min100g under vacuum tightness is < 10mbar slowly adds acetone, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collects upper oil phase and surveys acid number, detect the acid number of the different sampling spot samples obtained, and calculating esterification yield, result is shown in table 21.

Table 21, different time points acid value and esterification yield

Time (h)	0	2	4	6
					Acid value (mgKOH/g)	28.62	10.65	7.90	4.72
Esterification yield (%)	0.00	62.79	72.40	83.51

Embodiment 19

Get 50g to come unstuck dewaxing drying of rice rice bran oil, add 0.69g glycerine, under 10000-15000rpm, stir homogeneous 3min material is mixed completely.Be warming up to 75 DEG C, add 2.5g immobilized lipase Novozym435, speed with 2ml/min100g under vacuum tightness < 10mbar slowly adds acetone, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collects upper oil phase and surveys acid number, detect the acid number of the different sampling spot samples obtained, and calculating esterification yield, result is shown in table 22.

Table 22, different time points acid value and esterification yield

Time (h)	0	2	4	6
					Acid value (mgKOH/g)	28.62	10.99	8.37	5.06
Esterification yield (%)	0.00	61.60	70.75	82.32

Comparative example 6

Get 50g to come unstuck dewaxing drying of rice rice bran oil, the amount being 2:1 according to free fatty acids (free fatty acids molar weight=acid value/2/282) and glycerine mol ratio adds glycerine, stirs homogeneous 3min, material is mixed completely under 10000-15000rpm.Be warming up to 75 DEG C, add 2.5g immobilized lipase NOVOZYM435, react under vacuum tightness < 10mbar, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collects upper oil phase, detect acid value and DAG content, and calculate esterification yield, result is shown in table 22.

Table 22, different time points esterification yield and DAG content

Time (h)	2	4	6
				Esterification yield (%)	46.47	71.77	76.34
DAG content (%)	24.82	23.45	23.23

Comparative example 7

Get 50g to come unstuck dewaxing drying of rice rice bran oil, the amount being 2:1 according to free fatty acids and glycerine mol ratio adds glycerine, stirs homogeneous 3min under 10000-15000rpm, and material is mixed completely.Be warming up to 75 DEG C, add 2.5g immobilized lipase NOVOZYM435 and 7.5ml ethanol, react under vacuum tightness < 10mbar, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collects upper oil phase, detects acid value and DAG content, and calculating esterification yield, result is shown in table 23.

Table 23, different time points esterification yield and DAG content

Time (h)	2	4	6
				Esterification yield (%)	24.35	30.99	46.78
DAG content (%)	15.63	14.99	13.07

Comparative example 8

Get 50g to come unstuck dewaxing drying of rice rice bran oil, the amount being 3:1 according to free fatty acids and glycerine mol ratio adds glycerine, stirs homogeneous 3min under 10000-15000rpm, and material is mixed completely.Be warming up to 75 DEG C, add 2.5g immobilized lipase NOVOZYM435, react under vacuum tightness < 10mbar, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collects upper oil phase, detect acid value and DAG content, and calculate esterification yield, result is shown in table 24.

Table 24, different time points esterification yield and DAG content

Time (h)	2	4	6
				Esterification yield (%)	49.28	63.16	71.26

DAG content (%)

25.50

25.41

24.74

Comparative example 9

Get 50g to come unstuck dewaxing drying of rice rice bran oil, the amount being 3:1 according to free fatty acids and glycerine mol ratio adds glycerine, stirs homogeneous 3min under 10000-15000rpm, and material is mixed completely.Add the 100ml trimethyl carbinol and 5g3A molecular sieve, be warming up to 60 DEG C, add 2.5g immobilized lipase NOVOZYM435, vacuum tightness < 10mbar reacts, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collect upper oil phase, detect acid value and DAG content, and calculate esterification yield, result is as shown in Table 25.

Table 25, different time points esterification yield and DAG content

Time (h)	2	4	6
				Esterification yield (%)	5.48	10.85	16.92

Embodiment 20

Get 50g to come unstuck dewaxing drying of rice rice bran oil, the amount being 1.5:1 according to free fatty acids and glycerine mol ratio adds glycerine, stirs homogeneous 3min under 10000-15000rpm, and material is mixed completely.Be warming up to 75 DEG C, add 2.5g immobilized lipase NOVOZYM435, react under vacuum tightness vacuum tightness < 10mbar, flow pump is adopted to regulate the flow velocity dripping flow control ethanol to be that 1.75ml/h slowly adds in reactant in 2h before simultaneously after reaction starts, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collect upper oil phase, detect acid value and DAG content, and calculate esterification yield, result is shown in table 26.

Table 26, different time points esterification yield and DAG content

Time (h)	2	4	6
				Esterification yield (%)	67.27	74.27	79.97
DAG content (%)	32.47	30.92	28.80

Embodiment 21

Get 50g to come unstuck dewaxing drying of rice rice bran oil, the amount being 2:1 according to free fatty acids and glycerine mol ratio adds glycerine, stirs homogeneous 3min under 10000-15000rpm, and material is mixed completely.Be warming up to 75 DEG C, add 2.5g immobilized lipase NOVOZYM435, react under vacuum tightness < 10mbar, the flow velocity controlling ethanol before simultaneously after reaction starts in 2h is that 1.75ml/h slowly adds in reactant, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collect upper oil phase, detect acid value and DAG content, and calculate esterification yield, result is shown in table 27.

Table 27, different time points esterification yield and DAG content

Time (h)	2	4	6
				Esterification yield (%)	70.75	84.10	86.06
DAG content (%)	27.76	27.45	26.87

Embodiment 22

Get 50g to come unstuck dewaxing drying of rice rice bran oil, the amount being 3:1 according to free fatty acids and glycerine mol ratio adds glycerine, stirs homogeneous 3min under 10000-15000rpm, and material is mixed completely.Be warming up to 75 DEG C, add 2.5g immobilized lipase NOVOZYM435, react under vacuum tightness < 10mbar, the flow velocity controlling ethanol before simultaneously after reaction starts in 2h is that 1.75ml/h slowly adds in reactant, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collect upper oil phase, detect acid value and DAG content, and calculate esterification yield, result is shown in table 28.

Table 28, different time points esterification yield and DAG content

Time (h)	2	4	6
				Esterification yield (%)	62.47	67.28	70.29
DAG content (%)	22.42	20.58	19.66

Embodiment 23

Get 50g to come unstuck dewaxing drying of rice rice bran oil, the amount being 1:1 according to free fatty acids and glycerine mol ratio adds glycerine, stirs homogeneous 3min under 10000-15000rpm, and material is mixed completely.Be warming up to 75 DEG C, add 2.5g immobilized lipase NOVOZYM435, react under vacuum tightness < 10mbar, the flow velocity controlling ethanol before simultaneously after reaction starts in 2h is that 1.75ml/h slowly adds in reactant, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collect upper oil phase, detect acid value and DAG content, and calculate esterification yield, result is shown in table 29.

Table 29, different time points esterification yield and DAG content

Time (h)	2	4	6
				Esterification yield (%)	75.64	75.76	76.09
DAG content (%)	29.09	29.82	29.15

Embodiment 24

Get 50g to come unstuck dewaxing drying of rice rice bran oil, the amount being 1.5:1 according to free fatty acids and glycerine mol ratio adds glycerine, stirs homogeneous 3min under 10000-15000rpm, and material is mixed completely.Be warming up to 75 DEG C, add 2.5g immobilized lipase NOVOZYM435, react under vacuum tightness < 10mbar, the flow velocity controlling ethanol before simultaneously after reaction starts in 2h is that 1ml/h adopts flow pump coutroi velocity slowly to add in reactant, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collect upper oil phase, detect acid value and DAG content, and calculate esterification yield, result is shown in table 30.

Table 30, different time points esterification yield and DAG content

Time (h)	2	4	6
				Esterification yield (%)	60.21	70.87	75.66
DAG content (%)	29.47	26.92	25.80

Embodiment 25

Get 50g to come unstuck dewaxing drying of rice rice bran oil, the amount being 1.5:1 according to free fatty acids and glycerine mol ratio adds glycerine, stirs homogeneous 3min under 10000-15000rpm, and material is mixed completely.Be warming up to 75 DEG C, add 2.5g immobilized lipase NOVOZYM435, react under vacuum tightness < 10mbar, the flow velocity controlling ethanol before simultaneously after reaction starts in 2h is that 2.5ml/h adopts flow pump coutroi velocity slowly to add in reactant, sampling inspection in every 2 hours, the centrifugal 5min of 10000rpm, collect upper oil phase, detect acid value and DAG content, and calculate esterification yield, result is shown in table 31.

Table 31, different time points esterification yield and DAG content

Time (h)	2	4	6
				Esterification yield (%)	69.21	75.87	78.66
DAG content (%)	29.66	27.09	26.01

According to the above results, in reaction process, in the mixture of Rice oil and glycerine, add ethanol (such as, with 2-5ml/h100g Rice oil), content and the esterification yield of DAG can be improved.

Embodiment 26

Take 100g hair Rice oil, be heated to 75 DEG C; Add 50% citric acid solution 0.39g, shear 3min in 10000rpm; 30min is incubated at 70 DEG C; Continue afterwards in system, to add 16%NaOH solution 0.375g, 50%PLA1 enzyme liquid 1.5g and 2% glycerine; Regulate the moisture content of whole reaction system to be 0.51% and shear 3min in 10000rpm; Add 5% immobilized enzyme NOVOZYM435, in 65 DEG C, vacuum pump evacuation, reacts 6h under maintaining < 10mbar vacuum; The centrifugal 10min of sampling 10000rpm, collect oil phase, and detect phosphorus content and acid number, result is shown in table 32.

Embodiment 27

Take 100g hair Rice oil, be heated to 75 DEG C; Add 50% citric acid solution 0.39g, shear 3min in 10000rpm; 30min is incubated at 70 DEG C; Continue afterwards in system, to add 16%NaOH solution 0.375g, 50%PLA1 enzyme liquid 1.5g and 2% glycerine; Regulate the moisture content of whole reaction system to be 1.26% and shear 3min in 10000rpm; Add 5% immobilized enzyme NOVOZYM435, in 65 DEG C, vacuum pump evacuation, reacts 6h under maintaining < 10mbar vacuum; The centrifugal 10min of sampling 10000rpm, collect oil phase, and detect phosphorus content and acid number, result is shown in table 32.

Embodiment 28

Take 100g hair Rice oil, be heated to 75 DEG C; Add 50% citric acid solution 0.39g, shear 3min in 10000rpm; 30min is incubated at 70 DEG C; Continue afterwards in system, to add 16%NaOH solution 0.375g, 50%PLA1 enzyme liquid 1.5g and 2% glycerine; Regulate the moisture content of whole reaction system to be 3.76% and shear 3min in 10000rpm; Add 5% immobilized enzyme NOVOZYM435, in 65 DEG C, vacuum pump evacuation, reacts 6h under maintaining < 10mbar vacuum; The centrifugal 10min of sampling 10000rpm, collect oil phase, and detect phosphorus content and acid number, result is shown in table 32.

Embodiment 29

Take 100g hair Rice oil, be heated to 75 DEG C; Add 50% citric acid solution 0.39g, shear 3min in 10000rpm; 30min is incubated at 70 DEG C; Continue afterwards in system, to add 16%NaOH solution 0.375g, 50%PLA1 enzyme liquid 1.5g and 2% glycerine; Regulate the moisture content of whole reaction system to be 5.01% and shear 3min in 10000rpm; Add 5% immobilized enzyme NOVOZYM435, in 65 DEG C, vacuum pump evacuation, reacts 6h under maintaining < 10mbar vacuum; The centrifugal 10min of sampling 10000rpm, collect oil phase, and detect phosphorus content and acid number, result is shown in table 32.

Comparative example 10, waterless degelatinizing

By 100g hair Rice oil, be heated to 70 DEG C; Add 50% citric acid solution 0.39g, shear 3min in 10000rpm; 30min is incubated at 70 DEG C; Add 16%NaOH solution 0.375g, 50%PLA1 enzyme liquid 1.5g; 3min is sheared in 10000rpm; At 65 DEG C of reaction 6h; The centrifugal 10min of 10000rpm, collect oil phase, and detect phosphorus content and acid number, result is shown in table 32.

Comparative example 11, moisturely to come unstuck

By 100g hair Rice oil, be heated to 70 DEG C; Add 50% citric acid solution 0.39g, shear 3min in 10000rpm; 30min is incubated at 70 DEG C; Add 16%NaOH solution 0.375g, 50%PLA1 enzyme liquid 1.5g; Add 7.15g deionized water; 3min is sheared in 10000rpm; At 65 DEG C of reaction 6h; The centrifugal 10min of 10000rpm, collect oil phase, and detect phosphorus content and acid number, result is shown in table 32.

Comparative example 12, crude oil esterification

Take 100g hair Rice oil, add 2% glycerine; 3min is sheared in 10000rpm; Add 5% immobilized enzyme NOVOZYM435, in 65 DEG C, vacuum tightness < 10mbar, reaction 6h; In the centrifugal 10min of 10000rpm, collect oil phase, and detect phosphorus content and acid number, result is shown in table 32.

Table 32,

According to the result of table 32, add lipase and Phospholipid hydrolase in grease simultaneously and the moisture content controlling whole grease system when 0.51-5.01%, there is good degumming effect and esterifying efficiency.

In the following embodiments, the enzyme used in enzyme process reactor c is take weight ratio as the immobilized enzyme preparation Novozym435 of 1:1 mixing and the mixture of silica gel.

Embodiment 30, Rice oil sequential enzyme method esterification test

The glycerine of come unstuck dewaxing drying of rice rice bran oil and the 23.5g of 1500g is mixed at stock and adjunct entrance a; Mixed grease through heat exchange to 75 DEG C; Grease after heating, is delivered to enzyme process reactor c.Grease contacts with immobilized enzyme, and flows through every metafiltration net by overflow manner.This system temperature controls at 75 DEG C, and vacuum control is within 1mbar.

Grease after enzyme process esterification, overflow carries out vacuum hydro-extraction to the filling system d with spray.Control bottoms level about 50%, open discharge valve after exceeding liquid level, enter buffer tank f.

The oil plant of surge tank is cooled to 75 DEG C carrying out heat exchange, enters to shear dispersion system e and carry out shearings and disperse, and shear line speed is 25m/s, every 0.5h sampling, in the centrifugal 5min of 10000rpm, collects upper oil phase, detect acid number, and calculate esterification yield, result is shown in table 33.

Grease after shear-mixed is sent into enzyme process reactor c, carries out successive reaction, until acid value to be down to about 2mg/g fuel-displaced.

Embodiment 31, the esterification of Rice oil enzyme process

Mixed by the glycerine of come unstuck Rice oil and the 15.5g of 1000g, velocity of shear 15m/s shears 1.5min.Rice oil of coming unstuck after pre-treatment being sheared is heated to 70 DEG C; Add the immobilized enzyme preparation NOVOZYM435 of 50g, in 75 DEG C of reaction 3.5h(vacuum pump evacuation, vacuum tightness < 10mbar); Every sampling in 0.5 hour, in the centrifugal 5min of 10000rpm, collect upper oil phase, detect acid number, and calculate esterification yield, result is shown in table 33.

Table 33,

Embodiment 32 Rice oil different steps shear-mixed is tested

A, take the Rice oil sample that comes unstuck of 1000g, be heated to 70 DEG C; Add 15.5g glycerine, add the immobilized enzyme preparation NOVOZYM435 of 50g, in 75 DEG C of reactions, stirring velocity 500rpm, vacuum < 10mbar, every sampling in 2 hours, detects acid number, result is shown in table 34, after reaction 6hr, is separated immobilized enzyme.

B, take the Rice oil of coming unstuck of 1000g, be heated to 70 DEG C; Add 15.5g glycerine, and mix 15min by high speed shear (shear line speed 25m/s); Add the immobilized enzyme preparation NOVOZYM435 of 50g, after 75 DEG C of reaction 2hr, be separated immobilized enzyme.

Being divided into 2 parts by isolating the ferment treatment Rice oil after immobilized enzyme, being handled as follows respectively:

(b1) add the immobilized enzyme of 50% separation, 75 DEG C, stirring velocity 500rpm, vacuum tightness < 10mbar reacts, and every sampling in 2 hours, detect acid number, result was shown in table 34, or

(b2), high speed shear (shear line speed 25m/s) 15min, add the immobilized enzyme of 50% separation, in 75 DEG C, stirring velocity 500rpm, vacuum tightness < 10mbar, every 2 hours sampling, detect acid number, result is shown in table 34.

Enzyme-deactivating 30min under 80-85 DEG C of water-bath respectively; The centrifugal 5min of 10000rpm, collects oil sample.

Table 34, different cut mode contrast Rice oil enzyme process deacidification effect

Table 34 result shows, and after the process of high speed shear process, the reaction times of esterification deacidification can effectively shorten.

Embodiment 33, Rice oil vaccum dewatering effect are to a batch enzyme process esterification test effect contrast

Take the Rice oil sample that comes unstuck of 1000g, be heated to 70 DEG C; Add 15.5g glycerine, and shear 3min in 10000rpm; Add the immobilized enzyme preparation NOVOZYM435 of 50g, in 75 DEG C of vacuum reaction 6h, adopt respectively and maintain vacuum with the following method:

A () water ring vacuum pump vacuumizes, maintain vacuum < 10mbar.

B () scraping blade pump vacuumizes, maintain vacuum < 1mbar.

C () uses scraping blade pump to vacuumize, vacuum maintains < 1mbar, and makes grease through filler (Pall ring, model DG16, specification 16 × 16 × 0.5mm) Sprayer Circulation.

Every sampling in 2 hours, the centrifugal 5min of 10000rpm, collected upper oil phase, and detect acid number, result is shown in table 35.

Table 35, different vaccum dewatering mode are on the impact of enzyme process esterification

Embodiment 34, Rice oil vaccum dewatering are on the impact of continuous shear stress enzyme process esterification technique

The glycerine of come unstuck Rice oil sample and the 23.5g of 1500g is mixed at stock and adjunct entrance a.

Grease after combination treatment, is delivered to enzyme process reactor c.Grease directly contacts with immobilized enzyme, and flows through every metafiltration net by overflow manner.This system temperature controls at 75 DEG C, and vacuum control is within 1mbar.

Grease after enzyme process esterification, direct overflow carries out vacuum hydro-extraction to the filling system d with spray: dewatering type is as follows respectively:

A () uses first step vacuum pump (water ring vacuum pump) to vacuumize, maintain vacuum tightness < 10mbar, but do not use filter screen and the recycle system;

B () uses 2 grades of vacuum pumps (water ring vacuum pump and scraping blade pump) to vacuumize, maintain vacuum tightness < 1mbar, but do not use filter screen and the recycle system;

C () uses 2 grades of vacuum pumps (water ring vacuum pump and scraping blade pump) to vacuumize, maintain vacuum tightness < 1mbar, retains filter screen, and by grease through filler Sprayer Circulation, but do not open heating unit;

D () uses 2 grades of vacuum pumps (water ring vacuum pump and scraping blade pump) to vacuumize, maintain vacuum tightness < 1mbar, and by grease by heating system heats to 95 DEG C, through filler Sprayer Circulation, but do not use filter screen, and be cooled to 70 DEG C before removing shearing device after dewatering.

E () uses 2 grades of vacuum pumps (water ring vacuum pump and scraping blade pump) to vacuumize, maintain vacuum tightness < 1mbar, and by grease by heating system heats to 95 DEG C, through filler Sprayer Circulation, use filter screen simultaneously, and be cooled to 70 DEG C before removing shearing device after dewatering;

By grease after vacuum hydro-extraction, shear dispersion through shearing dispersion system e, carry out circulating reaction 6h(and carry out circulating reaction 6h by grease feeding subsystem UNIT2 after shearing dispersion system e shearing dispersion).

Every sampling in 2 hours, the centrifugal 5min of 10000rpm, collected upper oil phase, and detect acid number, result is shown in table 36.

Table 36, different vaccum dewatering effect are on the impact of continuous shear stress enzyme process esterification

Under high-speed and continuous shearing condition, because esterification self generates water, moisture by continuous shear stress dispersion thoroughly, generally only has vacuum condition to be difficult to reaction is carried out to positive dirction fast simultaneously.And sprayed in conjunction with temperature varying system in conjunction with filler by continuous shear stress, given full play to the advantage that continuous high speed is sheared, enzyme process esterifying efficiency significantly promotes.

The effect comparison of the different sorbent treatment of embodiment 35, Rice oil

Take the Rice oil sample that comes unstuck of 1000g, be heated to 75 DEG C; Add 15.5g glycerine, shear 3min in 10000rpm; Add immobilized enzyme preparation NOVOZYM435 (a) of 50g, or add immobilized enzyme preparation NOVOZYM435 and 50g carclazyte (b) of 50g, or the immobilized enzyme preparation NOVOZYM435 of 50g and 50g Calcium Chloride Powder Anhydrous (c), or the immobilized enzyme preparation NOVOZYM435 of 50g and 50g discolour silica gel (d), in 75 DEG C of reaction 4h(vacuum pump evacuation, maintain vacuum < 10mbar,), sample when reaction 0,0.5,2 and 4h respectively, the centrifugal 5min of 10000rpm, collect upper oil phase, detect acid number, result is shown in table 37.

Table 37, different sorbent treatment are to esterification deacidification influential effect

Embodiment 36, Rice oil silica gel absorber add the effect comparison of different positions

Take the Rice oil sample that comes unstuck of 1000g, be heated to 75 DEG C; Add 15.5g glycerine, shear 3min in 10000rpm;

Add immobilized enzyme preparation NOVOZYM435 (a) of 50g, or the mixture of the immobilized enzyme preparation NOVOZYM435 of (c) 50g silica gel and 50g, in 75 DEG C of reaction 4h, wherein, use

Vacuum pump evacuation, maintains vacuum < 10mbar.Sample when reaction 0,0.5,2 and 4h respectively, the centrifugal 5min of 10000rpm, collect upper oil phase, detect acid number, result is shown in table 38.

Enzyme-deactivating 30min under 80-85 DEG C of water-bath.

Rice oil of coming unstuck, under 75 DEG C of conditions, crosses unmodified packed column, and will collect the method process of oil sample by scheme (a) of acquisition, as scheme (b), acid number detected result is shown in table 38.

Table 38, sorbent material addition manner are to esterification deacidification influential effect

Table 38 result shows, and silica gel treatment is all improved than the enzyme process esterifying efficiency of blank sample.But silica gel and enzyme hybrid mode esterifying efficiency promote amplitude higher than silica gel pre-treatment suction type.

Embodiment 37

A, by the glycerine of come unstuck Rice oil and the 15.5g of 1000g mix, in 10000rpm shear 1.5min.3min is heated to 70 DEG C; Add the immobilized enzyme preparation NOVOZYM435 of 50g, react 6h in 75 DEG C of vacuum (vacuum pump evacuation maintains < 10mbar).

The centrifugal 5min of 10000rpm/min, collects zymin and grease, and the grease be separated is detected acid value, and calculate esterification yield, result is as shown in table 7; Repeat above-mentioned experiment 4 times by being separated the zymin obtained, test every batch of acid value of lipids, calculate esterification yield, result is as shown in table 7.

B, the continuous reaction apparatus successive reaction 5 times (reaction conditions is identical with scheme a) selected in the present invention, test every batch of acid value of lipids, and calculate esterification yield, result is as shown in table 7, and the immobilized enzyme wherein used is NOVOZYM435.

Table 39,

By continuous reaction apparatus of the present invention, the reusing of enzyme is increased dramatically.

The present invention adopts aqueous ethanolic solution to wash grease, add the preprocessing means such as polydimethylsiloxane, mega-shear, when enzyme process depickling, adopts inflated with nitrogen, drips the means raising enzyme process esterification efficiency such as normal hexane, Reaction time shorten.For integrated survey alcohol wash, add the process means such as polydimethylsiloxane, mega-shear, inflated with nitrogen and dropping normal hexane to the impact of enzyme process esterification efficiency, contriver adopts mathematical statistics method, carries out composite test to above-mentioned factor, specific as follows:

Embodiment 38 grease alcohol wash, carries out enzyme process esterification after adding polydimethylsiloxane

Get come unstuck, dewax after Rice pollard oil oil sample 60g, add 60g aqueous ethanolic solution (80%), vibration 3min; In 3000g, centrifugal 2min, collects oil sample, in 105 DEG C, and 50mbar, dry 3min, Rice pollard oil after acquisition alcohol wash;

Get Rice pollard oil 50g after alcohol wash, add 20ppm polydimethylsiloxane, 10000rpm shears 3min; Add 0.78g glycerine, 10000rpm shears 3min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, < 10mbar, reaction 6h, sampling inspection, the centrifugal 5min of 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield, and result shows, and the esterification yield after reaction 6h is 87%.

Embodiment 39 grease alcohol wash, carries out enzyme process esterification after mega-shear

Get Rice pollard oil 50g after the alcohol wash prepared by the method for embodiment 38, add 0.78g glycerine, mega-shear (linear velocity > 15m/s) 20min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, < 10mbar, reaction 6h sampling inspection, the centrifugal 5min of 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield, and measure AV change, and calculate esterification yield, result shows, and the esterification yield after reaction 6h is 89%.

Embodiment 40 grease alcohol wash, carries out enzyme process esterification under dripping normal hexane condition

Get Rice pollard oil 50g after the alcohol wash prepared by the method for embodiment 38, add 0.78g glycerine, 10000rpm shears 3min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, < 10mbar, reaction 6h, and in reaction process, drip normal hexane 200ml, reaction terminates the centrifugal 5min of rear sampling 10000rpm, collects upper oil phase, detects AV, and calculating esterification yield, result shows, and the esterification yield after reaction 6h is 88%.

Embodiment 41 carries out enzyme process esterification after adding polydimethylsiloxane, mega-shear

Get come unstuck, dewax, dry rice oil extracted from rice husks 50g, add polydimethylsiloxane 20ppm; Add 0.78g glycerine, carry out mega-shear (linear velocity > 15m/s) 20min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, < 10mbar, reaction 6h, reaction terminates the centrifugal 5min of rear sampling 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield.Result shows, and the esterification yield after reaction 6h is 88%.

Embodiment 42 adds polydimethylsiloxane, fill nitrogen condition under carry out enzyme process esterification

Get come unstuck, dewax, dry rice oil extracted from rice husks 40g, add polydimethylsiloxane 20ppm; Add 0.78g glycerine, 10000rpm shears 3min; Add the lipase NOVOZYM435 that oil weighs 5%; < 10mbar, reaction 6h, wherein, fill nitrogen in reaction process and carry out, nitrogen is filled with by bottom reactant;

Reaction terminates the centrifugal 5min of rear sampling 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield, and result shows, and the esterification yield after reaction 6h is 84%.

Embodiment 43 carries out enzyme process esterification under adding polydimethylsiloxane, dropping normal hexane condition

Get come unstuck, dewax, dry rice oil extracted from rice husks 50g, add polydimethylsiloxane 20ppm; Add 0.78g glycerine, 10000rpm shears 3min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, < 10mbar, reaction 6h, meanwhile, drips normal hexane 200ml in reaction process;

Reaction terminates rear sampling, the centrifugal 5min of 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield, and result shows, and the esterification yield after reaction 6h is 78%.

Embodiment 44 mega-shear, carries out enzyme process esterification under filling nitrogen condition

Get come unstuck, dewax, dry rice oil extracted from rice husks 50g, add 0.78g glycerine, carry out mega-shear (linear velocity > 15m/s) 20min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, < 10mbar, reaction 6h, fill nitrogen in reaction process and carry out, nitrogen is filled with by bottom reactant;

Reaction terminates rear sample, the centrifugal 5min of 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield, and result shows, and the esterification yield after reaction 6h is 86%.

Embodiment 45 carries out enzyme process esterification under filling nitrogen, dropping normal hexane condition

Get come unstuck, dewax, dry rice oil extracted from rice husks 50g, add 0.78g glycerine, 10000rpm shears 3min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, < 10mbar, reaction 6h, fill nitrogen in reaction process and carry out, nitrogen is filled with by bottom reactant, drips normal hexane 200ml simultaneously.

Reaction terminates rear sampling, the centrifugal 5min of 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield, and result shows, and the esterification yield after reaction 6h is 88%.

Embodiment 46 grease alcohol wash, adds polydimethylsiloxane, carries out enzyme process esterification under dripping normal hexane condition

Get Rice pollard oil 50g after the alcohol wash prepared by the method for embodiment 38, add 20ppm polydimethylsiloxane, 10000rpm shears 3min; Add 0.78g glycerine, 10000rpm shears 3min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, < 10mbar, reaction 6h, and in reaction process, drip normal hexane 200ml.

Reaction terminates rear sampling, the centrifugal 5min of 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield, and result shows, and the esterification yield after reaction 6h is 91%.

Enzyme process esterification is carried out under embodiment 47 alcohol wash, mega-shear, dropping normal hexane condition

Get come unstuck, dewax after Rice pollard oil oil sample 60g, add 60g aqueous ethanolic solution (80%), vibration 3min; In 3000g, centrifugal 2min, collects oil sample, in 105 DEG C, and 50mbar, dry 3min, Rice pollard oil after acquisition alcohol wash;

Get alcohol wash Rice pollard oil 50g, add 0.78g glycerine, carry out mega-shear (linear velocity > 15m/s) 20min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, < 10mbar, reaction 6h, and fill nitrogen in reaction process and carry out, nitrogen is filled with by bottom reactant, meanwhile, drips normal hexane 200ml in reaction process.

Reaction terminates rear sampling, the centrifugal 5min of 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield, and result shows, and the esterification yield after reaction 6h is 93%.

Embodiment 48 defoamer, mega-shear, carry out enzyme process esterification under filling nitrogen condition

Get Rice pollard oil 50g after the alcohol wash prepared by the method for embodiment 38, add 20ppm polydimethylsiloxane, 10000rpm shears 3min, adds 0.78g glycerine, mega-shear (linear velocity > 15m/s) 20min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, < 10mbar, reaction 6h, and fill nitrogen in reaction process and carry out, nitrogen is filled with by bottom reactant, meanwhile, drips normal hexane 200ml in reaction process.

Reaction terminates rear sampling, the centrifugal 5min of 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield, and result shows, and the esterification yield after reaction 6h is 86%.

Embodiment 49 mega-shear, carries out enzyme process esterification under filling nitrogen, dropping normal hexane condition

Get come unstuck, dewax, dry rice oil extracted from rice husks 50g, add 0.78g glycerine, carry out mega-shear (linear velocity > 15m/s) 20min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, 1mbar, reaction 6h, and fill nitrogen in reaction process and carry out (nitrogen is filled with by bottom reactant), in reaction process, drip normal hexane 200ml simultaneously.

Reaction terminates rear sampling, the centrifugal 5min of 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield, and result shows, and the esterification yield after reaction 6h is 93%.

Embodiment 50 grease alcohol wash, adds polydimethylsiloxane, mega-shear, and carries out enzyme process esterification under the condition of dropping normal hexane

Get Rice pollard oil 50g after the alcohol wash prepared by the method for embodiment 38, add 20ppm polydimethylsiloxane, 10000rpm shears 3min; Add 0.78g glycerine, mega-shear (linear velocity > 15m/s) 20min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, 1mbar, reaction 6h, and in reaction process, drip normal hexane 200ml.

Reaction terminates rear sampling, the centrifugal 5min of 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield, and result shows, and the esterification yield after reaction 6h is 88%.

Embodiment 51 grease alcohol wash, adds polydimethylsiloxane, under the condition of filling nitrogen, dropping normal hexane, carry out enzyme process esterification

Get Rice pollard oil 50g after the alcohol wash prepared by the method for embodiment 38, add 20ppm polydimethylsiloxane, 10000rpm shears 3min, adds 0.78g glycerine, and 10000rpm shears 3min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, 1mbar, reaction 6h, and fill nitrogen in reaction process and carry out, nitrogen is filled with by bottom reactant, meanwhile, drips normal hexane 200ml in reaction process.

Reaction terminates rear sampling, the centrifugal 5min of 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield, and result shows, and the esterification yield after reaction 6h is 90%.

Embodiment 52 grease alcohol wash, carries out mega-shear, under the condition of filling nitrogen, dropping normal hexane, carry out enzyme process esterification

Get Rice pollard oil 50g after the alcohol wash prepared by the method for embodiment 38, add 0.78g glycerine, mega-shear (linear velocity > 15m/s) 20min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, 1mbar, reaction 6h, and fill nitrogen in reaction process and carry out, nitrogen is filled with by bottom reactant, drips normal hexane 200ml in reaction process simultaneously.

Reaction terminates rear sampling, the centrifugal 5min of 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield, and result shows, and the esterification yield after reaction 6h is 90%.

Embodiment 53 adds polydimethylsiloxane, carries out mega-shear, under the condition of filling nitrogen, dropping normal hexane, carry out enzyme process esterification

Get come unstuck, dewax, dried Rice pollard oil oil sample 50g, add 20ppm polydimethylsiloxane, 10000rpm shears 3min; Add 0.78g glycerine, mega-shear (linear velocity > 15m/s) 20min; Add the lipase NOVOZYM435 that oil weighs 5%; In 75 DEG C, 1mbar, reaction 6h, and fill nitrogen in reaction process and carry out, nitrogen is filled with by bottom reactant, meanwhile, drips normal hexane 200ml in reaction process.

Reaction terminates rear sampling, the centrifugal 5min of 10000rpm, collects upper oil phase, detects AV, and calculates esterification yield, and result shows, and the esterification yield after reaction 6h is 87%.

Quality after the refining of embodiment 54 enzyme process esterification Rice oil

Get the enzyme process esterification Rice oil in table 40 respectively, carry out decolouring, deodorization process or alkali refining, decolouring, deodorization process (specifically in table 40), obtain enzyme process esterification refining Rice oil, concrete steps are as follows:

1. alkali refining: adopt the 10%NaOH aqueous solution, add 20% excess alkali, 80 DEG C, alkali refining 30min.Centrifugation obtains alkali refining oil;

2. decolour: add the atlapulgite of 2.5%, 105 DEG C, 100mbar, decolouring 30min.Filtration obtains bleached oil;

3. deodorization: 240 DEG C, 1mbar, nitrogen air lift 2h, obtain the refining oil after deodorization.

Detect the color of the refining oil that deodorization obtains, AV, thiaminogen content and total sterol content, result is shown in table 40.

Table 40,

The refining oil color obtained is for being not more than 5.4R, and such as 2.4R-5.4R, AV are 0.15 ~ 0.51mgKOH/g, thiaminogen content >14000ppm, such as 14247-18898ppm, total sterol content >12000ppm, such as 12165-15251ppm.

According to the above results, enzyme process esterification refining Rice oil can preserve the beneficiating ingredient in Rice oil well, as thiaminogen, total sterol.Color, AV reach national refined rice bran oil standard simultaneously.

According to the above results, use technique means of the present invention or its combination, can esterifying efficiency be improved, and/or improve DAG content.The Rice oil using aforesaid method to prepare, can preserve the beneficiating ingredient in Rice oil well, as thiaminogen, total sterol.Color, AV reach national refined rice bran oil standard simultaneously.

Claims (9)

1. the method for an enzyme process esterification treatment grease, it is characterized in that, described enzyme process esterification treatment grease is the mixture using lipase treatment grease and glycerine, and described method is the one or more steps before enzyme process esterification or in comprising the following steps in enzyme process esterification process:

A) the particle diameter <15 micron of described mixture is controlled, preferred <1000 nanometer; Preferably, described mixture through high speed shear process, preferably, described high speed shear for be not less than 10m/s, mixture described in the VELOCITY SHEAR being preferably not less than 20m/s;

B) mixture described in alcohol wash, preferably, use ethanol, methyl alcohol, Virahol or above-mentioned alcohol-water solution to wash described mixture, preferably, the determining alcohol of described alcohol-water solution is 20% ~ 80%;

C) in described mixture, add silicone oil, preferred silicone oil is polydimethylsiloxane, cyclomethicone and/or siloxanes ether copolymers, preferably, with the weighing scale of described mixture, described silicone oil is 0.1ppm ~ 500ppm, preferred 0.1-50ppm, more preferably 1-30ppm;

D) before enzyme process esterification treatment or in treating processes, the alcohol that carbonatoms is C1-C4 and/or low boiling point organic solvent is added in described mixture, preferred alcohol is ethanol, methyl alcohol and/or propyl alcohol, preferred low boiling point organic solvent is normal hexane, hexanaphthene, iso-pentane, Skellysolve A, pentamethylene, sherwood oil, ether, propyl ether, benzene, chloroform, acetone and/or ethyl acetate, preferably, with the weighing scale of described mixture, described alcohol is 4-10%, is preferably 7-8%; Preferably, with the weighing scale of described mixture, described low boiling point organic solvent is 50-500%, is preferably 200-400%;

E) in enzyme process esterification treatment process, be filled with in the reaction system of described mixture and enzyme not with or the gas that substantially do not react with the component of reaction system, and control reaction system in vacuum reaction, preferred described vacuum reaction is in vacuum tightness <500mbar, preferred vacuum tightness <50mbar reaction, preferably, described gas is nitrogen or rare gas element;

Described lipase is preferably CALB, Lipozyme RM IM, Lipozyme TL IM, Novo435, Lipase AP15, Lipase PS, Lipase AK, Lipase A6, Lipase F, Lipase AY30, Lipase G80 and/or Lipase M-10.

2. the method for an enzyme process esterification treatment grease, it is characterized in that, described enzyme process esterification treatment grease is the mixture using lipase and Phospholipid hydrolase process grease and glycerine, preferably, in described mixture, water-content is lower than 10%, and preferably, in described mixture, moisture content is lower than 6%, preferred, in described reaction system, moisture content is 0.51%-5.01%;

Described lipase is preferably CALB, Lipozyme RM IM, Lipozyme TL IM, Novo435, Lipase AP15, Lipase PS, Lipase AK, Lipase A6, Lipase F, Lipase AY30, Lipase G80 and/or Lipase M-10; Described Phospholipid hydrolase is preferably phospholipase A1, Phospholipase A2, Phospholipase C and/or Phospholipid hydrolase enzyme D.

3. the method for claim 1, it is characterized in that, the mixture of described enzyme process esterification treatment grease and glycerine is the mixture using lipase treatment grease and glycerine, be preferably the lipase using immobilized lipase or mix with silica gel, be more preferably the mixture of immobilized lipase ferment treatment grease and the glycerine mixed with silica gel; Described lipase is preferably CALB, Lipozyme RM IM, Lipozyme TL IM, Novo435, Lipase AP15, Lipase PS, Lipase AK, Lipase A6, Lipase F, Lipase AY30, Lipase G80 and/or Lipase M-10.

4. method as claimed in claim 1 or 2, it is characterized in that, described mixture carries out enzyme process esterification in the equipment for enzyme process esterification treatment grease, and preferably, described equipment comprises the lipase mixed with silica gel, is preferably immobilized lipase;

Preferably, the described lipase mixed with silica gel is positioned in stacked filter screen, and preferably, in described stacked filter screen, the thickness of every layer of described lipase is 15-25mm;

Preferably, described stacked filter screen is provided with screen cloth to tackle immobilized enzyme particle, and preferably, described screen cloth can tackle 90%, and preferably 95%, more preferably 98%, the more preferably immobilized enzyme particle of more than 99%; Preferred mesh size is not less than 1mm, is more preferably not less than 0.075mm;

Preferably, described screen bottom is cross or rice font ruggedized construction;

Preferably, described stacked filter screen is arranged in enzyme process reactor c.

5. method as claimed in claim 4, it is characterized in that, described equipment comprises:

Stock and adjunct opening for feed a: the introducing port comprising grease and/or Auxiliary Liquid Material, introducing port is provided with spray dispersing head, and so that mixed raw material and auxiliary material are sent into enzyme process reactor c, preferably, described spray dispersing head is positioned at the top of enzyme process reactor c; Preferably, described stock and adjunct opening for feed a is connected with heating unit, so that the mixed raw material and auxiliary material of sending into enzyme process reactor c are heated to suitable temperature;

Enzyme process reactor c: be placed with the lipase mixed with silica gel in claim 3 in described enzyme process reactor c; Preferably, described enzyme process reactor c is connected with temperature regulating device, to control the temperature of reaction of oil sample; Described enzyme process reactor c is connected with dewatering system d;

Dewatering system d, preferably, described dewatering system d is the filling system with spray: the top of the described filling system with spray is packing layer, and described packing layer preferably adopts Raschig ring, Stainless Steel Cloth or Pall ring; The bottom of the described filling system with spray is furnished with pump, dehydration cycle is carried out so that the oil sample entering bottom is sprayed to top packing layer, preferably, described pump is recycle pump, impeller pump, peristaltic pump, preferably, also heating unit is furnished with, with reacting by heating oil sample in the bottom of the filling system with spray; With

Vacuum system g: described vacuum system g is connected with described enzyme process reactor c, described dewatering system d respectively, and to provide vacuum environment, preferably, described vacuum system g is 1 grade or multi-stage vacuum system;

Preferably, described equipment also comprises shears dispersion system e: described shearing dispersion system e for oil sample being carried out shearing dispersion, preferably, described shearing dispersion system e is frequency conversion high shear force tubular type shearing device, end dress formula high-shearing dispersion emulsifying machine or clarifixator; Preferably, described shearing dispersion system e is respectively equipped with oil outlet and thief hole, is respectively used to fuel-displaced and sampling; Preferably, described shearing dispersion system e is provided with heat sink, to reduce oil sample temperature; Preferably, described vacuum system g is connected with described shearing dispersion system e, to provide vacuum environment;

Preferably, described dewatering system d is provided with buffer tank, to store the grease through processed.

6. the method for claim 1, it is characterized in that, use in the process of the mixture of lipase treatment grease and glycerine, in described mixture, add Phospholipid hydrolase, described Phospholipid hydrolase is preferably phospholipase A1, Phospholipase A2, Phospholipase C and/or Phospholipid hydrolase enzyme D.

7. the method according to any one of claim 1-6, it is characterized in that, described grease is animal grease and/or Vegetable oil lipoprotein, preferred Vegetable oil lipoprotein is Rice oil, sunflower seed oil, plam oil, palm-kernel oil, peanut oil, rapeseed oil, soybean oil, linseed oil, Oleum Gossypii semen, safflower oil, Purple Perilla Seed Oil, tea-seed oil, Castor oil, jojoba oil, sweet oil, oleum theobromatis, tallowseed oil, almond oil, Prunus amygdalus oil, bancoul nuts oil, rubber seed oil, maize germ, wheat germ oil, sesame seed oil, seed of Radix Oenotherae erythrosepalae oil, hazelnut oil, Semen Cucurbitae oil, Walnut oil., raisin seed oil, linseed oil, borage seed oil, Seabuckthorm Seed Oil, tomato seed oil, macadimia nut oil, one or more in Oleum Cocois, preferred animal grease is tallow, lard, sheep oil, chicken fat, fish oil, seal oil, whale oil, porpoise oil, oyster sauce, one or more in lanolin.

8. polished fat prepared by the method according to any one of claim 1-7.

9. polished fat as claimed in claim 7, is characterized in that, described polished fat is also through decolouring and/or deodorization process, and preferably, described polished fat is also through alkali refining process.