CN86105538A

CN86105538A - A kind of method for refining raw food oil

Info

Publication number: CN86105538A
Application number: CN 86105538
Authority: CN
Inventors: 豆新春
Original assignee: OIL-FAT FACTORY PING-XIANG COUNTY FOOD DEPARTMENT
Current assignee: OIL-FAT FACTORY PING-XIANG COUNTY FOOD DEPARTMENT
Priority date: 1986-07-25
Filing date: 1986-07-25
Publication date: 1988-02-24

Abstract

The invention provides a kind of with the peanut that squeezes out.The crude oil of vegetable seed and beans is refined into the processing technology of edible oil.Be characterized in water mixing in the crude oil, stir, make the phosphatide in the crude oil combine precipitation with water, with separating of oil must table oil.In refining process, strict control watering quantity, oil temperature, water temperature and stirrer rotating speed.

This purifying method improves essential oil rate 7-17% than the alkali refining method, and cost descends 7.6-19%.

Description

The present invention relates to the refining techniques of edible oils such as a vegetable oil processing technology, particularly peanut oil, rapeseed oil, soya-bean oil.

At oil processing industry, crude oil is meant the thick oil that contains impurity such as phosphatide that oil press zhai is squeezed out.The method of general at present employing precipitation press filtration or alkali refining is an edible oil with the crude oil refining.

Usually the technical process of the alkali refining method that adopts is: chilled crude oil is warmed to 50-60 ℃, mixes the caustic soda solution of 18 degree, the caustic lye consumption is 8 percent to ten of a crude oil weight.Simultaneously, the speed of changeing with per minute 50 to 60 stirs, and quiescent setting was isolated the dregs of fat more than ten hours then, obtained refining oil.The method of this alkali refining treated oil needs to use caustic soda (Ke Xingjia), and cost is higher, and the essential oil pick-up rate is low, and oil is relatively poor.

The objective of the invention is to provide a kind of any chemical substance of not adding, also do not consume heat energy, can make the method for refining of high-quality edible oil.

The present invention is achieved in that according to the phosphatide possess hydrophilic property, suction back volumetric expansion, and proportion increases, and makes phosphatide transfer to water from oil phase, can precipitate from crude oil, isolating principle.In crude oil, mix an amount of water, reasonably control oil temperature, water temperature and stirring velocity simultaneously, make phosphatide and water combination, transfer to water, be floss and precipitate gradually,, obtain refining oil with separating of oil by oil phase.

A kind of technical process of the present invention is as follows: the crude oil of the heat that oil press zhai is squeezed out, sieve with 140 purpose screen clothes, and send into fining pot while hot, the stirrer that changes with per minute 60-70 stirs.Churning time is no less than ten minutes.For shortening temperature fall time, available cycles water cooling.When treating that oily temperature drops to 38-45 ℃, the stirrer rotating speed becomes per minute 30-40 and changes.Simultaneously, 33-40 ℃ warm fire is sprinkled upon on the pasta gently, equably, mixes in the oil.Watering quantity is the 0.5-3% of crude oil weight, and the water mixing time was controlled between five to 15 minutes.After the water mixing, the stirrer rotating speed becomes per minute 60-70 again to be changeed, and continues to stir 15 to 30 minutes, treat to occur in the oil floss and sinking, stop immediately stirring, staticly settle more than ten hours, can isolate the sedimentary dregs of fat, essential oil is sent into storage tanker or barrelling.

Be the warm therapy refining more than, also have a kind of cold process refining.When being water mixing, the crude oil temperature is reduced to 20-25 ℃, and the water temp that mixes is 15-20 ℃.All the other processing requirements and warm therapy are identical, more than the visual weather of two methods and condition select for use.

The advantage of this edible oil purifying method: the one, can significantly improve essential oil rate, essential oil quality height, refine peanut oil, rapeseed oil and soya-bean oil, the essential oil rate is more than 95%, improves 7-17% than general alkali refining method.Refining oil is through the test of Shanghai City grain and oil test center, and acid value is a 1.12mgkoH/g oil; Moisture is 0.196%; Assorted matter is 0.02%; Aflatoxin B1 does not detect PPb; Arsenide, mercuride does not all detect.Quality is better than national secondary oil standard.Oil is heated to 280 ℃, and oil colours is constant, and no precipitate meets hygienic standard.The 2nd, do not add any chemical substance, heat dissipation not, reduced investment, cost is low.Refined rapeseed oil, peanut oil and soya-bean oil in this way, per ton cost reduces by 230 yuan, 460 yuan and 560 yuan respectively than the alkali refining method, and reduced rate is 7.6-19%.

Below be to adopt embodiment of warm therapy purified.Behind the oil press zhai of oil-fat plant, be provided with one ton of a volume, in the fining pot of water-cooled tube and stirrer is arranged.With the peanut oil crude oil of screw oil expeller expressed heat, after 140 purpose screen clothes sieve, import fining pot.Behind the canful, start stirrer, the speed of changeing with per minute 70 stirs, the cooling of water flowing simultaneously.Churning time should be no less than 10 minutes.Treat oily temperature drop to 40 ℃, close water-cooled tube, the stirrer rotating speed becomes 35 and changes, and simultaneously, 35 ℃ warm water is sprinkled upon on the pasta for 16 kilograms gently, equably, mixes in the oil.The water mixing time is about 10 minutes.After having mixed water, the stirrer rotating speed becomes per minute 70 again to be changeed, and continues to stir, and notes observing pasta.After about 10 minutes, occur tiny floss and slowly sinking in the oil, turn off stirrer immediately.After staticly settling 12 hours, bleed off the sedimentary dregs of fat at the bottom of jar, promptly obtain 950 kilograms of peanut oil after the refining, after tested, quality is better than national two-grade peanut oil standard.

Claims

1, remove the method for refining raw food oil of the phosphatide in the crude oil in the processing of a kind of edible oil, it is characterized in that it being water mixing and stirring in the crude oil, phosphatide combines with water, is the floss postprecipitation.Isolating method.

2, by the described method of claim 1, it is characterized in that watering quantity is the 0.5-3% of crude oil weight, the water mixing mode is gently, is sprinkled upon equably on the pasta, and the water mixing time is five to 15 minutes.

3, by claim 1 or 2 described methods, the oil temperature is 38-45 ℃ when it is characterized in that water mixing, and the water temp that mixes is 33-40 ℃.

4, by claim 1 or 2 described methods, the oil temperature is 20-25 ℃ when it is characterized in that water mixing, and the water temp that mixes is 15-20 ℃.

5, by claim 1 or 2 described methods, it is characterized in that before the water mixing with water mixing after stirring velocity be that per minute 60 to 70 changes, the stirring velocity during water mixing is that per minute 30-40 changes.

6, by the described method of claim 3, it is characterized in that before the water mixing with water mixing after stirring velocity be that per minute 60 to 70 changes, the stirring velocity during water mixing is that per minute 30-40 changes.

7, by the described method of claim 4, it is characterized in that before the water mixing with water mixing after stirring velocity be that per minute 60-70 changes, the stirring velocity during water mixing is that per minute 30 to 40 changes.