CN102757863A

CN102757863A - De-waxing and refining production process of corn germ oil

Info

Publication number: CN102757863A
Application number: CN2012100605202A
Authority: CN
Inventors: 关宪峰
Original assignee: HARBIN TIANTONG AGRICULTURAL SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: HARBIN TIANTONG AGRICULTURAL SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2012-03-09
Filing date: 2012-03-09
Publication date: 2012-10-31

Abstract

The invention provides a de-waxing and refining production process of corn germ oil. The production process sequentially comprises the following steps of: 1, dissolution stage, to be specific, heating oil to be de-waxed to 45 DEG C and fully dissolving wax in the oil; 2, crystallization stage, wherein the temperature range from 35 DEG C to 28 DEG C is the main precipitation period of wax, the wax is separated out at 35 DEG C to 33 DEG C for 280 min, the wax is separated out at 33 DEG C to 30 DEG C for 200 min, and the wax is separated out at 30 DEG C to 28 DEG C for 280 min; and 3, crystal growing stage, wherein the temperature range from 25 DEG C to 12 DEG C is the main crystal growing time; the crystals are grown at 25 DEG C to 22 DEG C for 180 min, the crystals are grown at 22 DEG C to 18 DEG C for 180 min, and the crystals are grown at 18 DEG C to 15 DEG C for 160 min. Meanwhile, the stirring speed is reduced to 8-10 rpm. According to the production process, disclosed by the invention, parameters of the three key procedures including dissolution, crystallization and crystal growing and main technical indexes of the corn oil are formulated, crystallization rate is improved, corn oil quality is improved favorably and the quality of the corn oil is enabled to reach the first level of national standard.

Description

A kind of maize germ oil dewaxing purification preparation technique

Technical field:

The present invention relates to a kind of maize germ oil dewaxing purification preparation technique, belonged to food vegetable oil products field.

Background technology:

Maize germ is claimed Semen Maydis oil again, is the oil that from maize, extracts.The Semen Maydis oil golden yellow color is transparent, and A sweety scent assails the nostrils, and light taste does not have beany flavor, and is oily but not greasy, both can keep the color and luster of vegetables and food, original mouthfeel and local flavor, does not lose nutritive value again, is well suited for cooking fast frying and frying oil.

Semen Maydis oil is absorbed by the body easily, and specific absorption can be up to more than 98%.For most of people, it is a kind of ideal edible and healthy oil that Digestive tract has the people of pathology, particularly the elderly.It is in the history in existing more than 100 year of developed countries such as America and Europe, and at western developed country, Semen Maydis oil has become the main flow oil of household consumption and planted.In addition in Japan, the Middle East extensively receives human consumer's favor, so it is as a kind of table oil and extensively edible, enjoys laudatory titles such as " healthy oil ", " relieved oil ", " long life oil ".

China is corn planting and processing big country, and the quantity of sub product plumule is huge, and the condition of producing Semen Maydis oil is richly endowed by nature.Semen Maydis oil is saturated even with the unsaturated fatty acids proportioning, and essential amino acid content is abundant, is the higher Vegetable oil lipoprotein of a kind of nutritive value, and it develops vast market prospect abrim.

Owing to contain wax in the Semen Maydis oil, below 20 ℃, be flocculence and in oil, separate out, badly influence its impression, when edible simultaneously a kind of peculiar smell is arranged, have influence on its mouthfeel.Therefore, must carry out dewaxing treatment as commodity corn oil.But traditional Semen Maydis oil dewaxing technique causes the wax in the oil not remove fully because there is certain drawback in crystallization growing the grain operation, and can't reach freezing experiment does not have the requirement of separating out.The wax that removes out simultaneously is not in good state, and influences its comprehensive utilization, contains Chuck Steak in the wax, increases the grease production cost.

Summary of the invention:

The present invention is directed in the present dewaxing technique dewaxing not thoroughly, to contain innage, wax in the wax good and propose.Secondly the Heating temperature of treating pressed oil of to the effect that at first controlling of the present invention is the temperature and time of crystallization control and growing the grain process, and the 3rd is the stirring velocity in control growing the grain stage.Treat that pressed oil is heated to 45 ℃, the wax in the oil is fully dissolved, but want the strict controlled temperature can not be too high in the heat-processed, prevent oily overheated color reversion.Because wax is mainly separated out in 35 ℃～28 ℃ temperature range, this time interval will be grown.Even in order to guarantee the wax crystallization particulate, this interval is divided into three time periods accomplishes, 35 ℃～33 ℃ 280 minutes times spent of fs wherein, 33 ℃～30 ℃ 200 minutes times spent of subordinate phase, 30 ℃～28 ℃ 280 minutes times spent of phase III.25 ℃～12 ℃ is the rearing crystal time interval that the wax crystallization particle is grown up; In order to guarantee that the wax crystallization particle is big, be prone to filtration, state is good; This interval also is divided into three time periods completion, wherein: 25 ℃～22 ℃ 180 minutes times spent of fs, 22 ℃～18 ℃ 180 minutes times spent of subordinate phase; 18 ℃～15 ℃ 160 minutes times spent of phase III, can obtain best growing the grain effect.The wax crystallization particle can run foul of each other and merge growth in the oil in order to make, and will stir oil in the dewaxing process, changes but will be reduced to PM 8～10 in growing the grain stage stirring velocity, prevents to destroy wax article form.

The Wax particles that the present invention crystallizes out is superior to traditional dewaxing technique in effect aspect hardness, size and the oil-containing, and wax is filtered easily, and gatch is solid sheet state good hardness, and the processed oil freezing experiment is qualified.

Embodiment:

The pressed oil of treating in the oil tank is passed through the pump extraction, and through the under meter metering, through the plate-type heat exchanger heat exchange, this plate-type heat exchanger comes attemperation through automatic control.With the temperature regulation of treating pressed oil is 45 ℃.Oil after the heat exchange will directly be sent in the prilling tower, this prilling tower be furnished with the speed change whipping appts and in establish the heat-eliminating medium heat transfer tube.At first open whipping appts, rotating speed is made as 20～30 rev/mins, begin oil-feed after the temperature of heat transfer tube internal cooling medium is set at 35 ℃.After treating that oil is full of in the tower, keep 35 ℃～33 ℃ of oil temperature and kept 280 minutes.Then the temperature through regulating heat-eliminating medium to about 33 ℃, is kept oily temperature drop 33 ℃～30 ℃ of oil temperature and was kept 200 minutes.Temperature through regulating heat-eliminating medium to about 30 ℃, is kept oily temperature drop 30 ℃～28 ℃ of oil temperature and was kept 200 minutes at last.So far, the crystallisation process of treating pressed oil is accomplished.In order to guarantee that the brilliant form of wax is not destroyed, the oil in the prilling tower will gently be pressed in the growing the grain tower through compressed-air actuated pressure, this tower be furnished with the speed change whipping appts and in establish the heat-eliminating medium heat transfer tube.At first open whipping appts, rotating speed is made as 8～12 rev/mins, begin oil-feed after the temperature of heat transfer tube internal cooling medium is set at 25 ℃.After treating that oil is full of in the tower, keep 25 ℃～22 ℃ of oil temperature and kept 180 minutes.Then the temperature through regulating heat-eliminating medium to about 22 ℃, is kept oily temperature drop 22 ℃～18 ℃ of oil temperature and was kept 180 minutes.Temperature through regulating heat-eliminating medium to about 18 ℃, is kept oily temperature drop 18 ℃～15 ℃ of oil temperature and was kept 160 minutes at last.So far, treat that the growing the grain process of pressed oil is accomplished, the crystal grain of wax is in good condition in the oil, can be pressed into filter and accomplish the filtering work of wax in the oil.

Claims

1. maize germ oil dewaxing purification preparation technique, in turn include the following steps: dissolution-crystallization-growing the grain is characterized in that: in dissolution process, will treat that pressed oil adds 45 ℃ of thermics, fully dissolves the wax in the oil, but does not produce color reversion; Crystallisation process divides three phases to accomplish, wherein: 35 ℃～33 ℃ 280 minutes times spent of fs, 33 ℃～30 ℃ 200 minutes times spent of subordinate phase, 30 ℃～28 ℃ 280 minutes times spent of phase III, can obtain best crystallization effect; The growing the grain process divides three phases to accomplish, wherein: 25 ℃～22 ℃ 180 minutes times spent of fs, 22 ℃～18 ℃ 180 minutes times spent of subordinate phase, 18 ℃～15 ℃ 160 minutes times spent of phase III, can obtain best growing the grain effect.

2. a kind of maize germ oil dewaxing purification preparation technique according to claim 1 is characterized in that the stirring velocity of growing the grain process is controlled to be PM 8～10 commentaries on classics.