CN1238376A

CN1238376A - Process for defoaming raw plant oil obtained by mechanical extrusion

Info

Publication number: CN1238376A
Application number: CN 99114777
Authority: CN
Inventors: 覃桂军
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-04-06
Filing date: 1999-04-06
Publication date: 1999-12-15
Anticipated expiration: 2019-04-06
Also published as: CN1073150C

Abstract

A process for defoaming the raw plant oil obtained by mechanical extraction includes such technological steps as direct separation of surficial foam layer from raw plant oil, adding water, heating, stirring, and deposition.

Description

A kind of method of defoaming raw plant oil obtained by mechanical extrusion

The present invention relates to a kind of elimination raw plant oil foamy method, belong to the category of the refining processing of edible oil.

In China rural area,, be that the oilseeds output of unit is little with the family, so comparatively universal as the oil pressing factory of 95 type class oil press zhai based on small-sized oil press zhai because land area is less per capita.Oilseeds are through curing, smash to pieces, the raw plant oil that squeezes out, and its surface is often floating a thick layer of oil whip, and is entrained with a large amount of impurity.Can eliminate the quality that this oil vacuole layer is directly connected to oil product.Though the past is extensively adopted the method that directly stirs crude oil, fail to solve the most foamy problem that disappears all the time.Though the mode that adopts filtered crude oil also can the part froth breaking, filter pore is easily stopped up, matting is complicated on the contrary, is difficult to promote.Present also someone adopts adding edible defoaming agent froth breaking, though this method is effective, component of antifoam agent can influence the processed oil quality, only deposits the sympathetic variation of deutostoma in January as the processed oil of gained after handling through this method, puckery lip reflex etc. occurs.

The purpose of this invention is to provide and a kind ofly can effectively eliminate raw plant oil foamy method, it is easy and simple to handle, can guarantee the processed oil quality.

Above-mentioned purpose is achieved in that the foam layer that will float on the raw plant oil surface and be entrained with a large amount of impurity directly separates, takes out from crude oil, and put into a container, add an amount of water (its amount of water can by the 2%-100% of pending oil whip weight) again in the container, under stirring condition, heat then, make container contents rise to boiling, and keep boiling state; When oil vacuole dissipates substantially, stop to stir and heating, allow its natural sedimentation or pour in the former crude oil, together staticly settle with crude oil, remove the precipitation oil foot that is deposited on the grease bottom at last and get final product.The ultimate principle of present method is, because oil whip is being carried the hydrophilic impurity of many genus secretly, as colloids such as phosphatide, protein, mucus, pigments, they can adsorb mutually, flocculate and sink naturally (also can adsorb other impurity sinks) combine (hydration) with water after; Add heat energy and reduce the oil vacuole surface tension, also be beneficial to the aggegation of colloid suction after, and the maintenance boiling state, both promoted combining of colloid and water, excessive moisture is evaporated as far as possible, thereby reduce the grease water content, the evaporation of moisture can also prevent that Heating temperature is too high simultaneously, avoids the grease coking and influences oil quality; Stirring operation can destroy the particularly avidity between phospholipid molecule (because of phosphatide also is a kind of emulsifying agent) and the grease molecule of colloid, improves the chance that combines of colloid molecule and water molecules; be convenient to the colloid aquation; coacervations etc. this shows, the above-mentioned effectively froth breaking of water, heating and stirring that adds; decon; after stirring stopped, if handled thing is refunded in the former crude oil, the flocculation granule of above-mentioned generation or agglomerate can also absorption be suspended in the impurity in the crude oil; promote impurity coacervation precipitation

As above-mentioned, the method that adopts in the present invention and the existing rural area is compared, and tangible positively effect is arranged.At first, can disappear most machine of the present invention presses foam in the raw plant oil, and realizes increasing hardly under the facility investment situation; Secondly, boiling state in the operating process and basic froth breaking state all are convenient to range estimation and control, so operation is simple and feasible, are beneficial to popularization; Have, adopt the processed oil of gained of the present invention best in quality, purely be yellow clearly, fragrance is strong, and preserve 3-5 not spoiled, never degenerate.

The invention will be further described below in conjunction with embodiment:

Embodiment 1, to pour in the cylinder through the vegetable seed crude oil that 95 type oil press zhai are squeezed out, and floating on crude oil top layer and the impure about 3.0kg taking-up of oil whip, put into an aluminum pot, in aluminum pot, put into 0.3kg hot water again, then aluminum pot is placed on the stove and heat, the limit heating edge stirs with little aluminium wooden dipper, be boiling state in the last pot, continue in the boiling to stir 6-7 minute, oil vacuole just basic (more than 95%) dissipates, and stops this moment heating and stirring, and handled thing in the aluminum pot is refunded in the former cylinder crude oil, stir a little with excellent class, promptly be the non-foam state, quiet then will the precipitation about 2 hours, the complete layering of grease and oil foot, remove the sub-cloud oil foot, just obtain pure clear, the high-quality processed oil of fragrance.

Embodiment 2, employing and embodiment 1 identical operations step only add the tap water of 0.6kg, about 10 minutes of ebuillition of heated in the oil vacuole of 3.0kg, just basic defoamer, all the other operations are identical with embodiment 1 mode, and energy froth breaking, decon obtain pure clear high-quality processed oil equally.

Embodiment 3, employing and embodiment 1 identical operations step, only the water of adding 2.7kg in the oil vacuole of 3.0kg seethes with excitement and stirs 15 minutes just froth breakings, finally equally also can obtain the high-quality processed oil.

Embodiment 4, employing and embodiment 1 identical operations step only are to add 0.1kg hot water in the 3.0kg oil vacuole, and the most oil vacuole that also can disappear obtains the high-quality processed oil.

In the above-described embodiments, the water yield size that [1] adds, the influence of envrionment temperature, oilseeds quality, the 2%-100% range computation that its adding water yield is pressed oil vacuole weight all can; If the initial water shortage that adds can make up water be regulated in the heated and stirred process; The optimum range that but adds the water yield should be the 8%-15% of pending oil vacuole weight; [2] water that no matter adds is tap water or hot water, does not all influence its result; [3] oil vacuole in the pot dissipates under heated and stirred, and it is staticly settled, treat grease and throw out layering after, pour in the former crude oil its upper strata grease good; [4] in specific operation process, also the mode that adds the water post-heating earlier can be changed into the water mode that in the heat temperature raising process, adds, promptly oil vacuole just adds entry after being heated to certain temperature (40-90 degree Celsius) earlier, and the effect of its final froth breaking decon is the same; [5] the present invention adopts the natural sedimentation mode that leaves standstill, and its precipitation required time was about 15 minutes-24 hours.

Claims

1, a kind of method of defoaming raw plant oil obtained by mechanical extrusion, it is characterized in that the foam layer that directly will float on the crude oil surface separates, takes out, and put into a container, again toward the interior water that adds by its oil whip weight 2%-100% of container, then under stirring condition, to the container heating, container contents is heated up be boiling state, till oil whip dissipates substantially; Stop heating and stirring subsequently,, remove the lower sediment thing through staticly settling.

2, want the method for art 1 described raw plant oil froth breaking as right, the optimal addn that it is characterized in that water is the 8%-15% of oil whip weight.