CN105462679A

CN105462679A - Technology for preparing highly pure crude rice bran oil

Info

Publication number: CN105462679A
Application number: CN201410411636.5A
Authority: CN
Inventors: 李勃
Original assignee: JIANGSU KANG ZHI YUAN GRAIN AND OIL CO Ltd
Current assignee: JIANGSU KANG ZHI YUAN GRAIN AND OIL CO Ltd
Priority date: 2014-08-21
Filing date: 2014-08-21
Publication date: 2016-04-06

Abstract

The invention discloses a technology for preparing highly pure crude rice bran oil. The technology comprises the steps of extraction, purification, acid hydration degumming, dewaxing and depickling, wherein depickling is characterized in that an esterification reaction of alcohols and fatty acids is carried out at 55-65DEG C under normal pressure by using an acidic catalyst, such as benzene sulfonic acid, p-toluenesulfonic acid, solid super acid, and highly acidic resin to remove fatty acids in grease and fatty acids in rice bran oil. The technology for preparing highly pure crude rice bran oil reserves glycerate and other beneficial components in the rice bran oil, and brings a wide development space for realizing optimal reasonable utilization of agriculture resources, maximized rural economic benefits and highest peasant income as an agriculture economy growth point.

Description

A kind of technique preparing high purity Rice bran crude oil

Technical field

The present invention relates to processing of agriculture product field, particularly a kind of technique preparing high purity Rice bran crude oil.

Background technology

Rice bran is byproduct important in the rice course of processing, containing abundant fat in rice bran, account for 18% ~ 25%, Rice pollard oil main component is fatty acid glycerine fat, in lipid acid composition palmitinic acid account for 12% ~ 20%, oleic acid 40% ~ 50%, linolic acid 29% ~ 42%, also containing compositions such as VITAMIN; Due to lipid acid composition in Rice pollard oil and containing some special composition, thus make Rice pollard oil have high nutritive value and pharmaceutical use, be day by day subject to people's attention; Traditional method is that rice bran is regarded feed feeding livestock and poultry, greatly reduces its nutritive value and resource value, causes resource serious waste, or regard fuel or abandon, to environment.

Rice bran to prepare oil has three productions technique: one is mechanical expression method, and two is solvent extraction methods, and three is supercritical extractions; The benefits such as these three kinds of methods respectively have feature: have oil quality with the Rice pollard oil that traditional mechanical milling process squeezes good, color is good-looking, edible pure, but oil yield is lower; Solvent extraction method can improve oil yield greatly, easy scale operation, but residing oily color is comparatively dark and more containing non-oily material in crude oil; The oil product of the residing oil of supercritical extraction is better, but requires that technology is high, equipment is expensive, now can not scale operation.

Summary of the invention

Technical problem to be solved by this invention is, overcome the shortcoming of prior art, a kind of technique preparing high purity Rice bran crude oil is provided, retain glycerate and other beneficiating ingredients in Rice pollard oil, can as rural economy growth point, to realizing agricultural resource Appropriate application optimization, rural economy maximizing the benefits, farmers' income maximum bring wide development space.

In order to solve above technical problem, the invention provides a kind of technique preparing high purity Rice bran crude oil, comprising following concrete steps:

(1) through rice bran degree of grinding 50 order, the water content 7% of wet method puffing, add leaching solvent Virahol by solid-liquid ratio 1: 5 (W/V), pH value is 6.4-6.6; Add the papoid that quality is rice bran 0.1-0.12%, the water of 10-12 times amount, stirs simultaneously; Extraction time is 4-8h;

(2) refining: alkali refining initial temperature 45 DEG C, KOH concentration 18.5%, excess alkali quantity 0.4%, and filter, in the Rice bran crude oil obtained after filtration, foreign matter content controls below 0.2%;

(3) sour hydration degum: sour water method for degumming mainly utilizes the dilute solution of strong acid in phosphoric acid, citric acid, oxalic acid, tartrate etc., to mix with Rice bran crude oil at 80 DEG C and to leave standstill after stirring, major part phosphatide and part wax precipitation are removed, and repeatedly come unstuck and thoroughly can remove phosphatide and most rice bran wax several times;

(4) dewax: grease is heated to 80-90 DEG C, under agitation progressively cools to 15-20 DEG C, more than slaking 4h, the refining oil containing wax is at cryopreservation, and centrifugation, can obtain dewaxing Rice pollard oil;

(5) depickling: Rice pollard oil free fatty acid, wax and unsaponifiable matter content are high, acid catalyzed esterification method depickling 55 ~ 65 DEG C at ambient pressure, utilize an acidic catalyst as the esterification of the catalytic alcohol such as Phenylsulfonic acid, tosic acid, solid super-strong acid, highly acidic resin and lipid acid, remove lipid acid in grease, also the characteristic of lipid acid and glycerine synthetic glycerine three acid esters can be made with the lipase of some microorganism secretions, the lipid acid in removing Rice pollard oil.

The technical scheme that the present invention limits further is:

Further, the technique of aforesaid preparation high purity Rice bran crude oil, leaching solvent Virahol in step (1), pH value is 6.5, and add the papoid that quality is rice bran 0.1-0.12%, the water of 11 times amount, stirs; Extraction time is 6h.

The technique of aforesaid preparation high purity Rice bran crude oil, grease is heated to 85 DEG C in (4) by step, under agitation progressively cools to 18 DEG C.

The technique of aforesaid preparation high purity Rice bran crude oil, in step (5), Rice pollard oil free fatty acid, wax and unsaponifiable matter content are high, acid catalyzed esterification method depickling 60 DEG C at ambient pressure.

The invention has the beneficial effects as follows: a kind of designed by the present invention prepares that the explained hereafter process energy consumption of high purity Rice bran crude oil is low, oil yield is high, and the Rice pollard oil of good decolorizing effect, Rice pollard oil are at production process row impurity treatment, the content of further reduction well cuts, improves the quality of oil.

Embodiment

embodiment 1

A kind of technique preparing high purity Rice bran crude oil that the present embodiment provides, comprises following concrete steps:

(1) through rice bran degree of grinding 50 order, the water content 7% of wet method puffing, add leaching solvent Virahol by solid-liquid ratio 1: 5 (W/V), pH value is 6.4; Add the papoid that quality is rice bran 0.1%, the water of 10 times amount, stirs simultaneously; Extraction time is 4h;

(4) dewax: grease is heated to 80 DEG C, under agitation progressively cools to 15 DEG C, more than slaking 4h, the refining oil containing wax is at cryopreservation, and centrifugation, can obtain dewaxing Rice pollard oil;

(5) depickling: Rice pollard oil free fatty acid, wax and unsaponifiable matter content are high, acid catalyzed esterification method depickling 65 DEG C at ambient pressure, utilize an acidic catalyst as the esterification of the catalytic alcohol such as Phenylsulfonic acid, tosic acid, solid super-strong acid, highly acidic resin and lipid acid, remove lipid acid in grease, also the characteristic of lipid acid and glycerine synthetic glycerine three acid esters can be made with the lipase of some microorganism secretions, the lipid acid in removing Rice pollard oil.

embodiment 2

The invention provides a kind of technique preparing high purity Rice bran crude oil, comprise following concrete steps:

(1) through rice bran degree of grinding 50 order, the water content 7% of wet method puffing, add leaching solvent Virahol by solid-liquid ratio 1: 5 (W/V), pH value is 6.5; Add the papoid that quality is rice bran 0.11%, the water of 11 times amount, stirs simultaneously; Extraction time is 6h;

(4) dewax: grease is heated to 85 DEG C, under agitation progressively cools to 18 DEG C, more than slaking 4h, the refining oil containing wax is at cryopreservation, and centrifugation, can obtain dewaxing Rice pollard oil;

(5) depickling: Rice pollard oil free fatty acid, wax and unsaponifiable matter content are high, acid catalyzed esterification method depickling 60 DEG C at ambient pressure, utilize an acidic catalyst as the esterification of the catalytic alcohol such as Phenylsulfonic acid, tosic acid, solid super-strong acid, highly acidic resin and lipid acid, remove lipid acid in grease, also the characteristic of lipid acid and glycerine synthetic glycerine three acid esters can be made with the lipase of some microorganism secretions, the lipid acid in removing Rice pollard oil.

Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.

Claims

1. prepare a technique for high purity Rice bran crude oil, it is characterized in that, comprise following concrete steps:

2. the technique of preparation high purity Rice bran crude oil according to claim 1, is characterized in that, leaching solvent Virahol in step (1), and pH value is 6.5, and add the papoid that quality is rice bran 0.1-0.12%, the water of 11 times amount, stirs; Extraction time is 6h.

3. the technique of the preparation high purity Rice bran crude oil according to right 1, is characterized in that, grease is heated to 85 DEG C in (4) by step, under agitation progressively cools to 18 DEG C.

4. according to the technique of the preparation high purity Rice bran crude oil in right 1 to 3 described in any one claim, it is characterized in that, in step (5), Rice pollard oil free fatty acid, wax and unsaponifiable matter content are high, acid catalyzed esterification method depickling 60 DEG C at ambient pressure.