CN104585359A - Method for preparing oil from whole grains of corns - Google Patents

Abstract

The invention discloses a method for preparing oil from the whole grains of corns. The corn oil is produced by the procedures of as the whole grains of the corns are used as materials, removing impurities, sieving for classification, roasting, squeezing, primarily filtering, carrying out heat treatment, separating, precisely filtering, cooling and storing. The method disclosed by the invention has the advantages that the freshness and the quality of the materials for preparing the corn oil are effectively guaranteed, the sections of extracting germs, pretreating the corn germs, deeply refining and the like in an existing corn-oil preparation technology are omitted, the production process of the corn oil is simplified, the investment for equipment and facilities is greatly reduced, the production process of the corn oil is shortened, and nutritional substances in the corn oil are retained as possible, so that the high-quality corn oil is obtained and the production cost and the energy consumption are reduced.

Description

The method of the full seed liquefaction of a kind of corn

Technical field

The present invention relates to fats and oils processing field, particularly the method for the full seed liquefaction of a kind of corn.

Background technology

Corn oil and maize germ oil, the oil produced by maize germ, golden yellow color, fragrant odour, corn oil is rich in the necessary unrighted acid of human body, unsaturated fatty acid content reaches more than 80%, be mainly linoleic plus oleic acid, its Linoleic acid accounts for more than 50% of grease total amount, oleic acid content is about 30%, the physiological activator such as phytosterol (content reaches 1.1%) and vitamin E (content reaches 0.99%) is also rich in corn oil, there is very high nutritive value, its absorptivity is up to 97%, it is the health-care edible oil of generally acknowledging both at home and abroad, its major function has reduction body's cholesterol, hypotensive, softening blood vessel, increase human muscle and heart, the function of cardiovascular system, prevent and improve artery sclerosis, reduce the effects such as cardiovascular and cerebrovascular disease generation.Along with expanding economy, corn oil will become the first-selected edible oil of family health care, also will lead trend that is high-end, fashional consumption.

At present, maize germ is the byproduct of corn alcohol industry and the processing of starch industry substantially, corn oil is produced and is generally comprised corn extraction plumule, liquefaction wool lubricant refining three process procedures of maize germ, the technical process that these three process procedures comprise is generally as follows: (1) extracts plumule technical process: corn extracts plumule alcohol industry many employings semidry method, starch industry many employings wet underwater welding, method all more complicated of these two kinds extraction plumules, technical process as semidry method is: corn → cleaning → profit water → fragmentation → screening → air draught separation → gravity classification → pressure embryo → screening → plumule.(2) oil-producing technique process: maize germ → drying → cleaning → softening → prick embryo → steaming to fry → squeezing (or leaching) → crude oil.(3) refinery processes: raw corn oil → come unstuck → depickling → washing → drying → decolouring → deodorization → refined maize's oil.The subject matter that the method that existing corn oil is produced exists has: the freshness of (1) maize germ is poor, can not obtain the corn oil of high-quality.Mainly due to byproduct that maize germ is corn processing, the plumule extracted needs after the accumulation of a period of time, reach certain quantity, just can carry out the operation of squeezing liquefaction, the maize germ resting period is long not only makes the loss of oil composition, also due to lipolytic enzyme hydrolysis, lipid generation hydrolysis in maize germ is become sour, cause oil yield low, therefore the crude oil poor quality obtained, darkening of corn oil, acid value increases, produce pungent and peculiar smell, must further could eat by intensive conch, cause the nutrient component damages of corn oil a lot, nutritive value is had a greatly reduced quality.In addition, easily produce go mouldy when maize germ water content height, the maize germ gone mouldy is likely containing aflatoxin, and the security of the corn oil obtained thus does not just ensure.(2) process route is long, process is complicated, and the quality that each process procedure production technology is grasped also directly has influence on the quality of corn oil, adds the cost of investment of equipment, production cost and energy consumption simultaneously.Therefore, the corn oil of high-quality be obtained, ensure that the freshness of squeezing raw material is produced new method with research corn oil and had important practical significance.

Summary of the invention

The object of this invention is to provide the method for the full seed liquefaction of a kind of corn, with the full seed of corn for raw material, simplify production technology, shorten production process, reduce production cost.

Technical scheme of the present invention is: the method for the full seed liquefaction of a kind of corn, comprises the steps:

With the full seed of corn for raw material, by removal of impurities, sieving and grading, roast, squeeze, initial filter, heat treatment, separation, secondary filter, cooling, storage operation produce corn oil, concrete controlled condition is:

(1) removal of impurities, sieving and grading: the screen cloth of use different pore size and different wind-force remove earth, sandstone, broken stem stalk, broken maize leaves, these field trashes of dust in iblet, and iblet is divided into full, secondary full, not full rank;

(2) roast: temperature control roasts 0.5 ~ 1.5h at 80 ~ 120 DEG C, seed moisture 4 ~ 10%;

(3) squeeze: squeezing temperature control is 80 ~ 130 DEG C, pressure 30 ~ 50MPa;

(4) initial filter: carry out dregs of fat separation with 100 ~ 200 object stainless steel mesh, then by slag with iblet according to slag: the ratio of iblet=1:5 ~ 10 mixes squeezes again, and oil reservoir enters subsequent processing;

(5) heat treatment: mixing speed is 30 ~ 90r/min, makes oil be heated to 80 ~ 120 DEG C, enters subsequent processing after insulation 0.5h;

(6) be separated: to be separated after oily stratification or with filter-cloth filtering;

(7) essence filter: adopt 400 ~ 600 order filter clothes to carry out secondary filter to oil;

(8) cool: corn oil is cooled to normal temperature;

(9) preserve: corn oil is placed in ventilations, environment lucifuge that drying, sanitary condition are good preserves.

Unless otherwise indicated, percentage of the present invention is mass percent, and each constituent content percentage sum is 100%.

Outstanding advantages of the present invention is:

(1) directly with the full seed of corn for waste corn oil, ensure that the freshness and quality of producing corn oil raw material, for the corn oil producing high-quality provides precondition;

(2) with the full seed of corn for raw material, the pretreating process process of plumule, maize germ is extracted without the need to corn, without the need to raw corn oil intensive conch process, simplify production technology, decrease corn degerminating, the pretreatment of maize germ and the installations and facilities needed for intensive conch and technological operation, not only reduce investment and reduce production cost, also decreasing the adverse effect to grease as far as possible;

(3) pure physical squeezing, physical treatment crude oil technique is adopted, affect the material of oil quality in removal crude oil while, to the grease accompaniment that health is highly profitable in effective reservation corn oil, as phytosterol, various liposoluble vitamins etc., make high-end edible health-care oil.The corn oil product produced is up to state standards the requirement of " corn oil ".

Accompanying drawing explanation

Fig. 1 is the process chart of the method for the full seed liquefaction of corn of the present invention.

Detailed description of the invention

Below by way of drawings and Examples, technical scheme of the present invention is described further.

Embodiment 1

An example of the method for the full seed liquefaction of corn of the present invention, comprises the steps:

The full iblet screened is roasted 1.4h under 90 DEG C of conditions, seed moisture 7.2%; Temperature is 90 DEG C to the iblet roasted, pressure squeezes under being the condition of 45MPa entering to squeeze; The oily juice of squeezing out 150 object stainless steel mesh carry out dregs of fat separation, mixs and squeeze, the oil that separation obtains being heated to being separated the slag that obtains and iblet 90 DEG C with mixing speed 60r/min, being incubated 0.5h in the ratio of 1:8; After stratification, oil is separated, then carry out secondary filter with 500 order filter clothes, the corn oil after secondary filter is cooled to normal temperature, be placed in ventilation, environment lucifuge storage that drying, sanitary condition are good.Obtained corn oil the key technical indexes is as follows:

Color and luster (lovibond test groove 25.4mm): Y=30, R=4.9; Acid number (KOH, mg/g): 2.5; Peroxide value (mg/kg): 5.0; Dissolvent residual: do not detect; BaP: do not detect.

Embodiment 2

Another example of the method for the full seed liquefaction of corn of the present invention, comprises the steps:

The full iblet screened is roasted 1.2h under 100 DEG C of conditions, seed moisture 7.0%; Temperature is 100 DEG C to the iblet roasted, pressure squeezes under being the condition of 40MPa entering to squeeze; The oily juice of squeezing out 160 object stainless steel mesh carry out dregs of fat separation, mixs and squeeze, the oil that separation obtains being heated to being separated the slag that obtains and iblet 100 DEG C with mixing speed 60r/min, being incubated 0.5h in the ratio of 1:7; After stratification, oil is separated, then carry out secondary filter with 500 order filter clothes, the corn oil after secondary filter is cooled to normal temperature, be placed in ventilation, environment lucifuge storage that drying, sanitary condition are good.Obtained corn oil the key technical indexes is as follows:

Color and luster (lovibond test groove 25.4mm): Y=30, R=5.0; Acid number (KOH, mg/g): 2.7; Peroxide value (mg/kg): 5.2; Dissolvent residual: do not detect; BaP: do not detect.

Embodiment 3

Another example of the method for the full seed liquefaction of corn of the present invention, comprises the steps:

The full iblet screened is roasted 1.1h under 110 DEG C of conditions, seed moisture 6.6%; Temperature is 110 DEG C to the iblet roasted, pressure squeezes under being the condition of 45MPa entering to squeeze; The oily juice of squeezing out 180 object stainless steel mesh carry out dregs of fat separation, mixs and squeeze, the oil that separation obtains being heated to being separated the slag that obtains and iblet 110 DEG C with mixing speed 50r/min, being incubated 0.5h in the ratio of 1:9; After stratification, oil is separated, then carry out secondary filter with 450 order filter clothes, the corn oil after secondary filter is cooled to normal temperature, be placed in ventilation, environment lucifuge storage that drying, sanitary condition are good.Obtained corn oil the key technical indexes is as follows:

Color and luster (lovibond test groove 25.4mm): Y=30, R=5.0; Acid number (KOH, mg/g): 2.7; Peroxide value (mg/kg): 5.3; Dissolvent residual: do not detect; BaP: do not detect.

Embodiment 4

4th example of the method for the full seed liquefaction of corn of the present invention, comprises the steps:

The full iblet screened is roasted 0.9h under 120 DEG C of conditions, seed moisture 7.3%; Temperature is 120 DEG C to the iblet roasted, pressure squeezes under being the condition of 50MPa entering to squeeze; The oily juice of squeezing out 200 object stainless steel mesh carry out dregs of fat separation, mixs and squeeze, the oil that separation obtains being heated to being separated the slag that obtains and iblet 100 DEG C with mixing speed 70r/min, being incubated 0.5h in the ratio of 1:7; After stratification, oil is separated, then carry out secondary filter with 450 order filter clothes, the corn oil after secondary filter is cooled to normal temperature, be placed in ventilation, environment lucifuge storage that drying, sanitary condition are good.Obtained corn oil the key technical indexes is as follows:

Color and luster (lovibond test groove 25.4mm): Y=30, R=5.1; Acid number (KOH, mg/g): 2.6; Peroxide value (mg/kg): 5.1; Dissolvent residual: do not detect; BaP: do not detect.

Claims (1)

1. a method for the full seed liquefaction of corn, is characterized in that, comprise the steps:

With the full seed of corn for raw material, by removal of impurities, sieving and grading, roast, squeeze, initial filter, heat treatment, separation, secondary filter, cooling, storage operation produce corn oil, concrete controlled condition is:

(1) removal of impurities, sieving and grading: the screen cloth of use different pore size and different wind-force remove earth, sandstone, broken stem stalk, broken maize leaves, these field trashes of dust in iblet, and iblet is divided into full, secondary full, not full grade;

(2) roast: temperature control roasts 0.5 ~ 1.5h at 80 ~ 120 DEG C, seed moisture 4 ~ 10%;

(3) squeeze: squeezing temperature control is 80 ~ 130 DEG C, pressure 30 ~ 50MPa;

(4) initial filter: carry out dregs of fat separation with 100 ~ 200 object stainless steel mesh, then by slag with iblet according to slag: the ratio of iblet=1:5 ~ 10 mixes squeezes again, and oil reservoir enters subsequent processing;

(5) heat treatment: mixing speed is 30 ~ 90r/min, makes oil be heated to 80 ~ 120 DEG C, enters subsequent processing after insulation 0.5h;

(6) be separated: to be separated after oily stratification or with filter-cloth filtering;

(7) essence filter: adopt 400 ~ 600 order filter clothes to carry out secondary filter to oil;

(8) cool: corn oil is cooled to normal temperature;

(9) preserve: corn oil is placed in ventilations, environment lucifuge that drying, sanitary condition are good preserves.