CN105296138A

CN105296138A - Squeezing method for edible high-nutrition rice bran oil

Info

Publication number: CN105296138A
Application number: CN201510699597.8A
Authority: CN
Inventors: 尹成飞
Original assignee: Quanjiao County Yin Shi Oils And Fats Co Ltd
Current assignee: Quanjiao County Yin Shi Oils And Fats Co Ltd
Priority date: 2015-10-26
Filing date: 2015-10-26
Publication date: 2016-02-03

Abstract

The invention relates to the technical field of edible oil processing, in particular to a squeezing method for rice bran oil. The squeezing method includes the steps that rice bran is broken, water is added, the pH value is adjusted to be 5, papain and cellulase are added for enzymolysis, the obtained enzymolysis product is screened through 60-mesh screen cloth, enzymolysis residues are reserved and are dried until the water content is lower than 10%, and the enzymolysis residues are kept for 30-32 min on the condition with the microwave power of 22-25 W/g and the pressure of 0.135-0.15 MPa; the pressure is immediately reduced to a vacuum state, the enzymolysis residues are kept in the vacuum state for 10-15 min and are repeatedly squeezed to obtain crude oil and squeezed residues; the squeezed residues are introduced into a steam generator and are distilled at the steam temperature of 110 DEG C-115 DEG C and the pressure of 0.085-0.090 MPa, and distilling is stopped when no obvious oil droplets flow out of effluent to obtain distilled oil liquid; the crude oil and the distilled oil liquid are mixed, introduced into the steam generator and distilled at the steam temperature of 110 DEG C-120 DEG C and the pressure of 0.065-0.07 MPa, and distilling is stopped when no obvious oil droplets flow out of effluent.

Description

A kind of pressing method of edible high Nutritive Rice oil extracted from rice husks

Technical field

The present invention relates to edible oil processing technique field, be specifically related to a kind of pressing method of edible high Nutritive Rice oil extracted from rice husks.

Background technology

Rice pollard oil has very high nutritive value, in developed countries such as American-European Korean and Japaneses, it is a kind of health-nutrition equally celebrated for their achievements with sweet oil oil, dark in hyperlipidemia, cardio-cerebrovascular disorder crowd like, and become the routine health edible oil of west family already, China's Rice pollard oil raw material resources are enriched, but the production and consumption of Rice pollard oil is also in the starting stage, annual production is less than 120,000 tons, current Rice pollard oil complete processing is divided into physical squeezing method and Chemical Leaching method, physical squeezing method is a kind of simple, healthy working method, but it is low to there is oil yield, the shortcoming that impurity is high, although Chemical Leaching method improves oil yield, but easily retain chemical extraction material in grease, unfavorable to HUMAN HEALTH.

Summary of the invention

The object of the present invention is to provide a kind of pressing method of edible high Nutritive Rice oil extracted from rice husks.

The technical solution used in the present invention is, a kind of pressing method of edible high Nutritive Rice oil extracted from rice husks, comprises the following steps:

Rice bran is crushed to 200-220 order, adds water by the volume ratio of 1:3, regulate PH to 5, add papoid, cellulase at 30-35 DEG C after enzymolysis 30-35min, continue enzymolysis 40-45min at 50-55 DEG C, the zymolyte obtained crosses 60 eye mesh screens, retains enzymolysis residue;

Enzymolysis residue is dried to water content lower than 10% at 60-80 DEG C;

By enzymolysis residue microwave power be 22-25W/g, pressure keeps 30-32 minute under being 0.135-0.15MPa, keeps 10-15 minute under being down to vacuum state instantaneously;

By enzymolysis residue temperature be 60-67 DEG C, pressure squeezes 20-30min under being 70-75MPa repeatedly, obtains thick oil and press residue;

Press residue is passed in vapour generator, the vapor temperature of 100-115 DEG C, distill under pressure is 0.085-0.090MPa, when flowing out without obvious oil droplet to effluent liquid, stop distillation, obtain distilling fluid;

Thick oil is mixed with distillation fluid, passes in vapour generator, the vapor temperature of 110-120 DEG C, distill under pressure is 0.065-0.07MPa, when flowing out without obvious oil droplet to effluent liquid, stop distillation.

The present invention carries out enzymolysis processing to rice bran before squeezing, carry out expanded to enzymolysis residue after enzymolysis, squeezing oil yield can be significantly improved, repeatedly after squeezing, squeezing oil yield can reach 15.58%, by the process of dry blowing method, grease residual in residue is obtained further to press residue, two kinds for the treatment of processs combine, total oil yield of rice bran fruit stone can reach 18.35%, slightly again will pass through the process of dry blowing method after mixing with distillate by oil, can play lipin deacidifying, deodorization and the effect of purifying further, refining yield can reach 72.07%, acid value is 42, the grease obtained is limpid bright, color and luster is yellowish, grease two-story valley dimension cellulose content is up to 2.3739%, phosphorus content is up to 583.5mg/Kg.

Embodiment

The pressing method of embodiment 1, a kind of edible high Nutritive Rice oil extracted from rice husks, comprises the following steps:

Rice bran is crushed to 200 orders, adding water by the volume ratio of 1:3 regulates PH to 5, and add papoid, cellulase at 30 DEG C after enzymolysis 30min, continue enzymolysis 40min at 50 DEG C, the zymolyte obtained crosses 60 eye mesh screens, retains enzymolysis residue;

Enzymolysis residue is dried to water content lower than 10% at 60 DEG C;

By enzymolysis residue microwave power be 22W/g, pressure keeps 30 minutes under being 0.135MPa, be down to instantaneously under vacuum state and keep 10 minutes;

By enzymolysis residue temperature be 60 DEG C, pressure squeezes 20min under being 70MPa repeatedly, obtains thick oil and press residue;

Press residue is passed in vapour generator, the vapor temperature of 100 DEG C, distill under pressure is 0.085MPa, when flowing out without obvious oil droplet to effluent liquid, stop distillation, obtain distilling fluid;

Thick oil is mixed with distillation fluid, passes in vapour generator, the vapor temperature of 110 DEG C, distill under pressure is 0.065MPa, when flowing out without obvious oil droplet to effluent liquid, stop distillation.

The pressing method of embodiment 2, a kind of edible high Nutritive Rice oil extracted from rice husks, comprises the following steps:

Rice bran is crushed to 220 orders, adds water by the volume ratio of 1:3, regulate PH to 5, add papoid, cellulase at 35 DEG C after enzymolysis 35min, continue enzymolysis 45min at 55 DEG C, the zymolyte obtained crosses 60 eye mesh screens, retains enzymolysis residue;

Enzymolysis residue is dried to water content lower than 10% at 80 DEG C;

By enzymolysis residue microwave power be 25W/g, pressure keeps 32 minutes under being 0.15MPa, be down to instantaneously under vacuum state and keep 15 minutes;

By enzymolysis residue temperature be 67 DEG C, pressure squeezes 30min under being 75MPa repeatedly, obtains thick oil and press residue;

Press residue is passed in vapour generator, the vapor temperature of 115 DEG C, distill under pressure is 0.090MPa, when flowing out without obvious oil droplet to effluent liquid, stop distillation, obtain distilling fluid;

Thick oil is mixed with distillation fluid, passes in vapour generator, the vapor temperature of 120 DEG C, distill under pressure is 0.07MPa, when flowing out without obvious oil droplet to effluent liquid, stop distillation.

Claims

1. a pressing method for edible high Nutritive Rice oil extracted from rice husks, it is characterized in that, it comprises the following steps:

A, rice bran is crushed to 200-220 order, adds water by the volume ratio of 1:3, regulate PH to 5, add papoid, cellulase at 30-35 DEG C after enzymolysis 30-35min, continue enzymolysis 40-45min at 50-55 DEG C, the zymolyte obtained crosses 60 eye mesh screens, retains enzymolysis residue;

B, enzymolysis residue to be dried to water content lower than 10% at 60-80 DEG C;

C, by enzymolysis residue microwave power be 22-25W/g, pressure keeps 30-32 minute under being 0.135-0.15MPa, keeps 10-15 minute under being down to vacuum state instantaneously;

D, by enzymolysis residue temperature be 60-67 DEG C, pressure squeezes 20-30min under being 70-75MPa repeatedly, obtains thick oil and press residue;

E, press residue is passed in vapour generator, under the vapor temperature of 100-115 DEG C, distill under pressure is 0.085-0.090MPa, when flowing out without obvious oil droplet to effluent liquid, stop distillation, obtain distilling fluid;

F, mix with distillation fluid by thick oil, pass in vapour generator, under the vapor temperature of 110-120 DEG C, distill under pressure is 0.065-0.07MPa, when flowing out to effluent liquid without obvious oil droplet, stopping is distilled.