CN104673490B - The method of refining of rice bran oil - Google Patents
The method of refining of rice bran oil Download PDFInfo
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Abstract
The invention belongs to grease processing technology field, and in particular to a kind of method of refining of rice bran oil.The method of refining of rice bran oil, including following steps：Rice bran crude oil is used into enzymatic degumming, then using enzyme process depickling, decolourizes, obtains finished product rice bran oil.The beneficial effects of the present invention are using the method for the present invention to refining of crude rice bran oil, digested to the fractions in hair oil extracted from rice husks using biology enzyme, improve the quality of rice bran oil, the oryzanol saved in oil product, the content of tocopherol isoreactivity material compared with limits.The method action condition of the present invention is gentle, handles, environment will not be polluted without to follow-up organic solvent.
Description
Technical field
The invention belongs to grease processing technology field, and in particular to a kind of method of refining of rice bran oil.
Background technology
Rice bran is the byproduct of cereal processing, rich in grease, protein, cellulose and multivitamin.Rice bran oil-containing 16-
22%, rice bran oil contains unrighted acid, oleic acid, linoleic acid, and contains abundant oryzanol.Oryzanol has reduction blood small
Plate cohesion, reduce hepatic cholesterol synthesis and reduce the effect such as cholesterol absorption.But for a long time, rice bran is only as extensive style
Forage feed livestock and poultry, its nutritive value and economy of resources is played and is utilized well, cause great waste, it is right
This, brainstrust is deeply felt gentle and cherished.According to oil and foodstuffs circle, expert points out, because oil content reaches 15%-20% in rice bran, so by existing
It is enough therefrom to refine out rice bran oil for technology.Rice bran oil not only possesses the excellent cooking and edible performance, and has solely
Special healthcare function, thus great exploitation potential and value.In fact, Ancient Times in China is among the people just going through for edible rice bran oil
History.According to《Compendium of Materia Medica》Middle load, rice bran oil acrid-sweet flavor is mild-natured, has unobstructed, lower gas, the work(of appetizing, cures mainly the diseases such as the cancer of the esophagus, tinea pedis；
《Chinese herbal cuisine voluminous dictionary》Middle load, contained Hi-Z can improve neuro vegetative dysfunction in rice bran oil, increase in liver
The content of glycogen；Especially, it should be noted that it can also be refined out from rice bran oil using modern means of science and technology a kind of effective anti-
Cancer material.Since the nineties, rice bran oil is as origin of heat and nutritional health food, by many developed countries in the world
Common concern.Its fragrant odour having, high temperature resistant frying, resistance to permanent the advantages that storing with the generation of almost unharmful substance,
Be any vegetable oil it is incomparable, rice bran oil has the advantages of its is unique, such as fragrant odour as oil for cooking, more
The frying of secondary high temperature is also non-discolouring and resistance to long time stored etc..The chemical constitution composition of rice bran oil is extremely excellent.According to detection, its fat
In fat acid, saturated fatty acid accounts for 15-20%, and unrighted acid accounts for 80-85%, if subdivision is got up, myristic acid accounts for 0.4-
1%, palmitic acid accounts for 12-18%, and stearic acid accounts for 1-3%, and C20-C22 saturated fatty acids account for 1%, and oleic acid accounts for 40-50%, linoleic acid
29-42% is accounted for, leukotrienes accounts for less than 1%, and palmitoleic acid accounts for 0.2-0.4%.Rice bran oil also contains vitamin E, squalene, activity
Lipase, sitosterol, campesterol, stigmasterol and three kinds of ferulic acid ester antioxidants and solid plant component etc., content accounts for 2%
~3% ferulic acid ester is a kind of excellent antioxidant, and three kinds of ferulic acid ester antioxidants are for rice bran oil antioxidative stabilizer
Important function is served, and itself also has the effect for adjusting human body brain function, to vascular headache, vegetative dystonia etc.
There is certain preventive and therapeutic effect.Rice bran oil can be used as the raw material of medical industry after refined, be mainly used to do pharmaceutical base and steady
Determine agent.Unrighted acid is essential fatty acid, but human body itself can not synthesize, it is necessary to is absorbed from the external world.In rice bran oil
The very high linoleic acid of content can change cholesterol and be distributed in vivo, reduce cholesterol and excessively deposited on vascular wall, available for height
Blood fat disease and the preventing and treating of atherosclerosis.The vitamin E contained in rice bran oil, there is antisterility, protection muscle and preventing and treating
Alimentary anemia etc. acts on.It has strong anti-oxidation effect, unrighted acid can be protected not oxidized into fat brown pigment, so that
Safeguard the complete function of cell, this be other plant oil it is incomparable；Squalene is to high low blood pressure, anaemia, diabetes, liver
The diseases such as hardening, tuberculosis, rheumatism, neuralgia have certain preventive effect；Because it has a preferable infiltration, diffusion sterilization and anti-oxidant
Effect, turn into the excellent material of cosmetics；The cosmetics produced using rice bran oil, it is strong with the affinity of skin, and stability is good,
Not oxidizable and layering, it is excellent cosmetics fat.Because it is the precursor of several sterols needed by human, to cell membrane
There is special role, this just determines that rice bran oil turns into the certainty of brain tonic and intelligence development functions food.Sterol contained by rice bran oil with
People's hormone in vivo is relevant, can adjust organism metabolism, effective to muscular dystrophy, while it has anti-inflammatory again, antitoxin, Hemorrhagic shock and anti-
Allergy acts on；Solid plant component in rice bran oil mainly has phytic acid, and the anti-corrosive fresh-keeping of grease is played an important role, its raffinate
Phytic acid sodium salt and bismuth salt are can be made into for medical industry, for treating gastritis, duodenal ulcer and diarrhoea etc..
Rice bran oil has extraordinary antioxidative stabilizer, and this contains the natural anti-oxidation of complicated component mainly due to it
Agent.In oil in addition to containing natural tocopherol (average total tocopherol content be 400mg/kg oil), also containing squalene and a variety of Ah
Wei's acid esters, they both contribute to anti-oxidant.Rice bran needs timely liquefaction, and oil yield is high, and the acid number of grease is low, of light color.In rice bran
Containing more lipolytic enzyme, when rice bran is without departing from the grain of rice, as long as rice does not go mouldy, the now active very little of lipolytic enzyme will not
Rice bran is caused to go bad.When rice bran departed within brown rice a few houres, lipolytic enzyme just shows great activity, rapid to decompose in rice bran
Grease and the substantial amounts of aliphatic acid that dissociates, cause acid number to increase substantially.Hair oil extracted from rice husks must refine in time, miscellaneous to remove machinery
Matter, lipolytic enzyme, microorganism and free fatty etc..
The self-characteristic of hair rice bran oil determines refining of crude rice bran oil process distinction in other oil products.The acid number of hair rice bran oil
Higher, typically in 8-20mgKOH/g, some ageing rice bran oil acid numbers are up to 30 more than mgKOH/g, secondly higher containing wax, and one
As be 2-5%, color and luster is higher, decolourizes difficult.Traditional alkali-refining process alkali refining loss is big, and refining cost is high.
Refined rice bran oil pale yellow, contain more than 80% unrighted acid in oily, its mid-oleic is very high, therefore people
Body is higher to the digestibility of rice bran oil.Rice bran oil has the function of reducing human body blood fat；It is a kind of good edible oil and fat.
Because refining of crude rice bran oil cost is higher, oil yield is low, therefore rice bran oil can only be largely used at present to manufacture soap, lubrication
Oil, aliphatic acid.Using physical deacidification method refined rice bran oil, just actively promote.Contain about 6% wax, wax water in Rice bran crude oil
Triacontanol can be produced after solution（It is commonly called as " melissyl alcohol "）.Contain 10% triacontanol in chaff wax.Triacontanol is a kind of plant
Growth hormone, the 0.1-1.0PPm aqueous solution（1 gram " melissyl alcohol " sprayable 20-200 mus crops）Rice, wheat, jade can be made
The volume increase such as rice, tomato and duckweed 10%-40%.
Oryzanol is primarily present in mao oil extracted from rice husks and its oil foot, and the content of the oryzanol in rice bran layer is 0.3-0.5%, rice
Chaff oryzanol when heating squeezing is dissolved in oil, and the content of oryzanol is about 2-3% in general hair oil extracted from rice husks, according to current production paddy
The technical merit of dimension element is the recyclable 1 ton of oryzanol of 100 tons of hair oils extracted from rice husks.The combination fat of oryzanol system forulic acid and phytosterol,
It can be extracted from the cereal grease such as rice bran oil, embryo oil, and its outward appearance is white to off-white color crystalline powder, tasteless, there is spy
An unusually sweet smell taste, various greases are dissolved under heating, it is not soluble in water.
Refining for rice bran oil, mainly consider to obtain quality high refined oil and acid byproduct fatty, compared with limits
The oryzanol retained contained by it, the content of the material such as tocopherol.
The content of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of method of refining of rice bran oil, method of the invention
It is gentleer relative to chemical method using enzyme to the degumming of hair oil extracted from rice husks and depickling, and environmental pollution will not be brought,.
The present invention is realized by following technical schemes：
A kind of method of refining of rice bran oil, including following steps：
Rice bran crude oil is used into enzymatic degumming, then using enzyme process depickling, decolourizes, obtains finished product rice bran oil.
The enzyme used in above-mentioned degumming step is amylase, phosphatidase.
The enzyme used in above-mentioned depickling step is lipase.
The method of refining of rice bran oil specifically includes following steps：
Degumming：Rice bran crude oil is inputted into reactor, is preheated to 40-50 DEG C, adds 40-50 DEG C of water, above-mentioned rice bran
The weight of crude oil and water ratio is 1：0.2-2.0；Add amylase enzymolysis 0.5-2h；The addition of above-mentioned amylase accounts for Rice bran crude oil
The 0.01-0.04% of weight；
Add phosphatidase enzymolysis 0.5-2h；The addition of above-mentioned amylase accounts for the 0.01-0.02% of Rice bran crude oil weight；
Temperature is added to be 90-95 DEG C, account for oil mass 6-10% water with 20-40rmp rotating speed stirring 10-20 r/min, standing
Centrifuged after 10-15min, the rotating speed of above-mentioned centrifugation is 200-1500r/min；
Depickling：The supernatant liquid of centrifugation is taken out, adds glycerine, above-mentioned glycerine accounts for the 0.2- of upper liquid body weight
4%, 40-50 DEG C is heated to, adds lipase hydrolysis, the addition of above-mentioned lipase is the 0.01-0.04% of upper liquid body weight；
Digest 0.5-2h；Add temperature to be 90-95 DEG C, account for supernatant liquid weight 6-10% water, stirred with 20-40rmp rotating speed
10-20 r/min, centrifuged after standing 10-15min, the rotating speed of above-mentioned centrifugation is 200-1500r/min；
Decolourize：Through the oil product for crossing depickling processing is carried out into decolorization.
In above-mentioned decolorization process, using carclazyte, it is comprised the concrete steps that, the oil product after depickling is handled is heated to
70-110 DEG C, into bleaching tower, oil product mixes with carclazyte, and the vacuum adjusted in bleaching tower is 0.09Mpa, and bleaching time is
0.4-1h。
Oil product is handled by deodorization again after above-mentioned decolorization process, in above-mentioned deodorising step, oil product is delivered to de-
Smelly tower, it is 15-20min to keep flowing time of the oil in deodorizing tower, and 230-260 DEG C of deodorization temperature, direct vapour dosage is oil product
The 1-3% of weight, vacuum absolute pressure are less than 200Pa, and deodorised oil is extracted out through oil-oil heat exchanger, last condenser cooling from tower bottom
To 35-40 DEG C.
Above-mentioned method also include deodorising step after hydrodewaxing step, in this step, deodorised oil through plate type heat exchanger with
Freezing liquid exchanges heat, and oil temperature is pumped into crystallizing tank after being down to 15 DEG C, oil product is stirred, and the rotating speed of stirring is 20-50 r/min, oil
Product are slowly dropped to 8 DEG C in the presence of freezing liquid and crystallized, and crystallization time is 2-4 hours, and crystal oil is pressed into maturator,
Growing the grain 3 hours, filters under 0.6Mpa air pressure, obtains dewaxed oil under the conditions of 8 DEG C of constant temperature.
Above-mentioned amylase is alpha-amylase.
Preferably, the method for refining of rice bran oil includes following steps：
Degumming：Rice bran crude oil is inputted into reactor, is preheated to 45 DEG C, adds 45 DEG C of water, above-mentioned Rice bran crude oil with
The weight ratio of water is 1：0.4；Add amylase enzymolysis 0.6h；The addition of above-mentioned amylase accounts for the 0.02% of Rice bran crude oil weight；
Add phosphatidase enzymolysis 0.6h；The addition of above-mentioned amylase accounts for the 0.015% of Rice bran crude oil weight；
Add temperature to be 92 DEG C, account for the water of oil mass 8% and stir 15 r/min with 30rmp rotating speed, centrifuged after standing 12min
Separation, the rotating speed of above-mentioned centrifugation is 300r/min；
Depickling：The supernatant liquid of centrifugation is taken out, adds glycerine, above-mentioned glycerine accounts for the 0.3% of upper liquid body weight,
45 DEG C are heated to, adds lipase hydrolysis, the addition of above-mentioned lipase is the 0.02% of upper liquid body weight；Digest 0.8h；Again
Add temperature to be 92 DEG C, account for the water of supernatant liquid weight 8%, 15 r/min are stirred with 30rmp rotating speed, centrifuged after standing 12min
Separation, the rotating speed of above-mentioned centrifugation is 300r/min；
Decolourize：Oil product through that will cross depickling processing carries out decolorization, and in above-mentioned decolorization process, using carclazyte, it has
Body step is that the oil product after depickling is handled is heated into 85 DEG C, and into bleaching tower, oil product mixes with carclazyte, and regulation is decolourized
Vacuum in tower is 0.09Mpa, bleaching time 0.6h.
Deodorization：Oil product is handled by deodorization again after decolorization process, and oil product is delivered into deodorizing tower, keeps oil in deodorizing tower
Interior flowing time is 18min, and 230-260 DEG C of deodorization temperature, direct vapour dosage is the 2% of oil product weight, and vacuum absolute pressure is less than
200Pa, extract deodorised oil out from tower bottom and be cooled to 37 DEG C through oil-oil heat exchanger, last condenser.
Dewaxing：In this step, deodorised oil exchanges heat through plate type heat exchanger and freezing liquid, and oil temperature is pumped into crystallization after being down to 15 DEG C
Tank, oil product is stirred, the rotating speed of stirring is 30 r/min, and oil product is slowly dropped to 8 DEG C in the presence of freezing liquid and tied
Crystalline substance, crystallization time are 3 hours, and crystal oil is pressed into maturator, growing the grain 3 hours under the conditions of 8 DEG C of constant temperature, in 0.6Mpa air pressure
Filtered under power, obtain dewaxed oil.
The beneficial effects of the present invention are using the method for the present invention to refining of crude rice bran oil, using biology enzyme to hair oil extracted from rice husks
In fractions enzymolysis, improve the quality of rice bran oil, the oryzanol saved in oil product, tocopherol isoreactivity compared with limits
The content of material.The method action condition of the present invention is gentle, handles, environment will not be caused without to follow-up organic solvent
Pollution.
Embodiment
The present invention is further described with reference to specific embodiment, so that those skilled in the art knows more about
The present invention, but and it is not so limited the present invention.
Embodiment 1
The method of refining of rice bran oil includes following steps：
Degumming：Rice bran crude oil is inputted into reactor, is preheated to 45 DEG C, adds 45 DEG C of water, above-mentioned Rice bran crude oil with
The weight ratio of water is 1：0.4；Add amylase enzymolysis 0.6h；The addition of above-mentioned alpha-amylase accounts for the 0.02% of Rice bran crude oil weight；
The acid value of Rice bran crude oil is 7.6KOHmg/g；
Add phosphatidase enzymolysis 0.6h；The addition of above-mentioned alpha-amylase accounts for the 0.015% of Rice bran crude oil weight；
Add temperature to be 92 DEG C, account for the water of oil mass 8% and stir 15 r/min with 30rmp rotating speed, centrifuged after standing 12min
Separation, the rotating speed of above-mentioned centrifugation is 300r/min；
Depickling：The supernatant liquid of centrifugation is taken out, adds glycerine, above-mentioned glycerine accounts for the 0.3% of upper liquid body weight,
45 DEG C are heated to, adds lipase hydrolysis, the addition of above-mentioned lipase is the 0.02% of upper liquid body weight；Digest 0.8h；Again
Add temperature to be 92 DEG C, account for the water of supernatant liquid weight 8%, 15 r/min are stirred with 30rmp rotating speed, centrifuged after standing 12min
Separation, the rotating speed of above-mentioned centrifugation is 300r/min；
Decolourize：Oil product through that will cross depickling processing carries out decolorization, and in above-mentioned decolorization process, using carclazyte, it has
Body step is that the oil product after depickling is handled is heated into 85 DEG C, and into bleaching tower, oil product mixes with carclazyte, and regulation is decolourized
Vacuum in tower is 0.09Mpa, bleaching time 0.6h.
Deodorization：Oil product is handled by deodorization again after decolorization process, and oil product is delivered into deodorizing tower, keeps oil in deodorizing tower
Interior flowing time is 18min, and 240 DEG C or so of deodorization temperature, direct vapour dosage is the 2% of oil product weight, and vacuum absolute pressure is less than
200Pa, extract deodorised oil out from tower bottom and be cooled to 37 DEG C through oil-oil heat exchanger, last condenser.
Dewaxing：In this step, deodorised oil exchanges heat through plate type heat exchanger and freezing liquid, and oil temperature is pumped into crystallization after being down to 15 DEG C
Tank, oil product is stirred, the rotating speed of stirring is 30 r/min, and oil product is slowly dropped to 8 DEG C in the presence of freezing liquid and tied
Crystalline substance, crystallization time are 3 hours, and crystal oil is pressed into maturator, growing the grain 3 hours under the conditions of 8 DEG C of constant temperature, in 0.6Mpa air pressure
Filtered under power, obtain dewaxed oil.
After testing, the acid value of rice bran oil made from the above method is 1.3KOHmg/g, and oryzanol content is 15200ppm.
Embodiment 2
The method of refining of rice bran oil includes following steps：
Degumming：Rice bran crude oil is inputted into reactor, is preheated to 40 DEG C, adds 40 DEG C of water, above-mentioned Rice bran crude oil with
The weight ratio of water is 1：0.3；Add amylase enzymolysis 0.5h；The addition of above-mentioned alpha-amylase accounts for the 0.01% of Rice bran crude oil weight；
The acid value of Rice bran crude oil is 7.4KOHmg/g；
Add phosphatidase enzymolysis 0.5h；The addition of above-mentioned alpha-amylase accounts for the 0.01% of Rice bran crude oil weight；
Add temperature to be 92 DEG C, account for the water of oil mass 8% and stir 15 r/min with 30rmp rotating speed, centrifuged after standing 12min
Separation, the rotating speed of above-mentioned centrifugation is 200r/min；
Depickling：The supernatant liquid of centrifugation is taken out, adds glycerine, above-mentioned glycerine accounts for the 0.2% of upper liquid body weight,
45 DEG C are heated to, adds lipase hydrolysis, the addition of above-mentioned lipase is the 0.01% of upper liquid body weight；Digest 0.8h；Again
Add temperature to be 92 DEG C, account for the water of supernatant liquid weight 6%, 10r/min is stirred with 20rmp rotating speed, centrifuged after standing 10min
Separation, the rotating speed of above-mentioned centrifugation is 200r/min；
Decolourize：Oil product through that will cross depickling processing carries out decolorization, and in above-mentioned decolorization process, using carclazyte, it has
Body step is that the oil product after depickling is handled is heated into 85 DEG C, and into bleaching tower, oil product mixes with carclazyte, and regulation is decolourized
Vacuum in tower is 0.09Mpa, bleaching time 0.5h.
Deodorization：Oil product is handled by deodorization again after decolorization process, and oil product is delivered into deodorizing tower, keeps oil in deodorizing tower
Interior flowing time is 18min, and 230 DEG C or so of deodorization temperature, direct vapour dosage is the 2% of oil product weight, and vacuum absolute pressure is less than
200Pa, extract deodorised oil out from tower bottom and be cooled to 37 DEG C through oil-oil heat exchanger, last condenser.
Dewaxing：In this step, deodorised oil exchanges heat through plate type heat exchanger and freezing liquid, and oil temperature is pumped into crystallization after being down to 15 DEG C
Tank, oil product is stirred, the rotating speed of stirring is 30 r/min, and oil product is slowly dropped to 8 DEG C in the presence of freezing liquid and tied
Crystalline substance, crystallization time are 3 hours, and crystal oil is pressed into maturator, growing the grain 3 hours under the conditions of 8 DEG C of constant temperature, in 0.6Mpa air pressure
Filtered under power, obtain dewaxed oil.
After testing, the acid value of rice bran oil made from the above method is 1.5KOHmg/g, and oryzanol content is 14900ppm.
Embodiment 3
The method of refining of rice bran oil includes following steps：
Degumming：Rice bran crude oil is inputted into reactor, is preheated to 50 DEG C, adds 50 DEG C of water, above-mentioned Rice bran crude oil with
The weight ratio of water is 1：0.5；Add amylase enzymolysis 0.8h；The addition of above-mentioned alpha-amylase accounts for the 0.02% of Rice bran crude oil weight；
The acid value of Rice bran crude oil is 7.5KOHmg/g；
Add phosphatidase enzymolysis 0.8h；The addition of above-mentioned alpha-amylase accounts for the 0.015% of Rice bran crude oil weight；
Add temperature to be 92 DEG C, account for the water of oil mass 8% and stir 15 r/min with 30rmp rotating speed, centrifuged after standing 12min
Separation, the rotating speed of above-mentioned centrifugation is 300r/min；
Depickling：The supernatant liquid of centrifugation is taken out, adds glycerine, above-mentioned glycerine accounts for the 0.3% of upper liquid body weight,
45 DEG C are heated to, adds lipase hydrolysis, the addition of above-mentioned lipase is the 0.02% of upper liquid body weight；Digest 0.8h；Again
Add temperature to be 92 DEG C, account for the water of supernatant liquid weight 8%, 15 r/min are stirred with 30rmp rotating speed, centrifuged after standing 12min
Separation, the rotating speed of above-mentioned centrifugation is 400r/min；
Decolourize：Oil product through that will cross depickling processing carries out decolorization, and in above-mentioned decolorization process, using carclazyte, it has
Body step is that the oil product after depickling is handled is heated into 90 DEG C, and into bleaching tower, oil product mixes with carclazyte, and regulation is decolourized
Vacuum in tower is 0.09Mpa, bleaching time 0.8h.
Deodorization：Oil product is handled by deodorization again after decolorization process, and oil product is delivered into deodorizing tower, keeps oil in deodorizing tower
Interior flowing time is 18min, and 260 DEG C or so of deodorization temperature, direct vapour dosage is the 2% of oil product weight, and vacuum absolute pressure is less than
200Pa, extract deodorised oil out from tower bottom and be cooled to 37 DEG C through oil-oil heat exchanger, last condenser.
Dewaxing：In this step, deodorised oil exchanges heat through plate type heat exchanger and freezing liquid, and oil temperature is pumped into crystallization after being down to 15 DEG C
Tank, oil product is stirred, the rotating speed of stirring is 30 r/min, and oil product is slowly dropped to 8 DEG C in the presence of freezing liquid and tied
Crystalline substance, crystallization time are 3 hours, and crystal oil is pressed into maturator, growing the grain 3 hours under the conditions of 8 DEG C of constant temperature, in 0.6Mpa air pressure
Filtered under power, obtain dewaxed oil.
After testing, the acid value of rice bran oil made from the above method is 1.4KOHmg/g, and oryzanol content is 15100ppm.
Claims (3)
1. the method for refining of rice bran oil, including following steps：
Degumming：Rice bran crude oil is inputted into reactor, is preheated to 45 DEG C, adds 45 DEG C of water, above-mentioned Rice bran crude oil and water
Weight ratio is 1：0.4；Add enzymolyzing alpha-amylase 0.6h；The addition of above-mentioned alpha-amylase accounts for the 0.02% of Rice bran crude oil weight；
Add phosphatidase enzymolysis 0.6h；The addition of above-mentioned phosphatidase accounts for the 0.015% of Rice bran crude oil weight；
Add temperature to be 92 DEG C, account for the water of weight of oil 8% and stir 15 min with 30rmp rotating speed, centrifuged after standing 12min,
The rotating speed of above-mentioned centrifugation is 300r/min；
Depickling：The supernatant liquid of centrifugation is taken out, adds glycerine, above-mentioned glycerine accounts for the 0.3% of upper liquid body weight, heats
To 45 DEG C, lipase hydrolysis are added, the addition of above-mentioned lipase is the 0.02% of upper liquid body weight；Digest 0.8h；
Add temperature to be 92 DEG C, account for the water of supernatant liquid weight 8%, 15 min are stirred with 30rmp rotating speed, after standing 12min
Centrifuge, the rotating speed of above-mentioned centrifugation is 300r/min；
Decolourize：Through the oil product for crossing depickling processing is carried out into decolorization.
2. the method for refining of rice bran oil as claimed in claim 1, it is characterised in that：
In decolorization process, using carclazyte, it is comprised the concrete steps that, the oil product after depickling is handled is heated into 85 DEG C, into de-
Color tower, oil product mix with carclazyte, and the vacuum adjusted in bleaching tower is 0.09Mpa, bleaching time 0.6h.
3. the method for refining of rice bran oil as claimed in claim 2, in addition to：
Deodorization：Oil product is handled by deodorization again after decolorization process, and oil product is delivered into deodorizing tower, keeps oil in deodorizing tower
Flowing time is 18min, and 240 DEG C of deodorization temperature, direct vapour dosage is the 2% of oil product weight, and vacuum absolute pressure is less than 200Pa, from
Tower bottom extracts deodorised oil out and is cooled to 37 DEG C through oil-oil heat exchanger, last condenser；
Dewaxing：In this step, deodorised oil exchanges heat through plate type heat exchanger and freezing liquid, and oil temperature is pumped into crystallizing tank after being down to 15 DEG C,
Oil product is stirred, the rotating speed of stirring is 30 r/min, and oil product is slowly dropped to 8 DEG C in the presence of freezing liquid and crystallized,
Crystallization time is 3 hours, and crystal oil is pressed into maturator, growing the grain 3 hours under the conditions of 8 DEG C of constant temperature, in 0.6Mpa air pressure
Lower filtering, obtains dewaxed oil.
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| CN105154219A (en) * | 2015-07-31 | 2015-12-16 | 崇州市白头甘泉工业油脂厂 | Rice bran oil refining technology |
| CN105132150A (en) * | 2015-07-31 | 2015-12-09 | 崇州市白头甘泉工业油脂厂 | Refining technology of rice bran oil |
| CN105419937A (en) * | 2015-11-20 | 2016-03-23 | 齐鲁工业大学 | Enzymic deacidification method for wheatgerm oil |
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