CN1053930A

CN1053930A - Method with refinement of evening primrose oil with anti oxidant

Info

Publication number: CN1053930A
Application number: CN 91101140
Authority: CN
Inventors: 李景道
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-02-21
Filing date: 1991-02-21
Publication date: 1991-08-21

Abstract

The invention belongs to the method for the character refinement of evening primrose oil that utilizes tannic acid oxygen uptake, antioxygen and precipitating proteins.In untreated Oenothera oil, add tannic acid and weakly alkaline cold boiling water simultaneously, mix thereupon, standing demix, emit ponding, with the cold boiling water of neutrality Oenothera oil is washed 4～5 times repeatedly, till water lotion is neutrality, standing demix, emit ponding, with emulsion dislocation otherwise processed in another kind of container.Take out processed refinement of evening primrose oil at last.Its treatment process is simple, and cost is low, can reduce peroxide value of evening primrose oil.The refinement of evening primrose oil yield can reach 90～97%.

Description

Method with refinement of evening primrose oil with anti oxidant

The invention belongs in preparation Oenothera oil process and prevent the treatment process that Oenothera oil is oxidized.

No matter take cold-press or solvent method from evening primrose seed, to propose Oenothera oil, all have Oenothera oil oxidized shortcoming easily.Owing to contain unsaturated fatty acids in the Oenothera oil, particularly change PGE easily in vivo into ₁Gamma-linolenic acid (unsaturated fatty acids that contains three two keys), very easily oxidized, make it lose physiologically active.Evening primrose seed self also contains hydrolysate oil and the enzyme that can promote Fatty Acid Oxidation simultaneously, when condition is suitable, will play the katalysis of quickening lipid acid hydrolysis and promote the oxidation.Therefore, in preparation Oenothera oil technology, prevent Oenothera oil be hydrolyzed with oxidation be a difficult problem that needs to be resolved hurrily.Oxidized for preventing Oenothera oil both at home and abroad at present, adopt activated carbon and atlapulgite to carry out decoloration treatment method more; Or utilize method for washing to handle; Or the method for filling nitrogen is handled in packing tube, but the shortcoming that this method exists nitrogen to reveal easily; Or the method for dosing tocopherol (3～5%) handles, but its cost is too high.Therefore still there is not effective processing approach at present.To the greatest extent the quality of Oenothera oil can't be improved.

The object of the present invention is to provide two kinds of schemes.

First kind of scheme: at first, undressed Oenothera oil 200kg is placed 500 liters the enamel still that agitator is housed, add tannic acid 2Kg and pH value thereupon and be 60 liters in 8～9 cold boiling water.Stirred 1 hour with 60 rev/mins rotating speeds, standing demix is 0.5 hour then.Lower floor's ponding is emitted, add pH value thereupon again and be 60 liters in 7 cold boiling water, stirred 1 hour, treat that standing demix after 0.5 hour, emits lower floor's ponding again with 60 rev/mins rotating speeds.So repeatedly Oenothera oil is washed and handle 4～5 times, till water lotion is neutrality.With the emulsion dislocation in another container.Oenothera oil in the enamel still is reduced pressure under the condition of 70 ℃/50mmHg, remove the residual moisture content that looses, emit Oenothera oil at last.The Oenothera oil of being emitted can be decoloured with activated carbon in case of necessity, to obtain the refinement of evening primrose oil of low peroxide value.

Second kind of scheme: at first undressed Oenothera oil 100kg is placed 500 liters the enamel still that agitator is housed, put into 300 liters of normal hexanes (or sherwood oil) thereupon, after waiting to stir, add tannic acid 1kg and pH value again and be 30 liters in 8～9 cold boiling water, stirred 1 hour with 60 rev/mins rotating speeds, treat that standing demix after 0.5 hour, emits lower floor's ponding.In the enamel still, add pH value again and be 40 liters in 7 cold boiling water, stirred 1 hour, stopped to stir standing demix 0.5 hour, emit lower floor's ponding with 60 rev/mins of rotating speeds.Oenothera oil is washed 4～5 times so repeatedly, till water lotion is neutrality.At last with the emulsion dislocation in another container.The Oenothera oil in the enamel still under the condition of 70 ℃/50mmHg, reclaim under reduced pressure normal hexane (or sherwood oil) and part moisture content.Oenothera oil can be carried out the decolorizing with activated carbon processing in case of necessity, to obtain the refinement of evening primrose oil of low peroxide value.

The antioxidant tannic acid that is adopted among the present invention (hydrolyzable tannic acid or condensed tannins) belongs to the Polyphenols goods and materials.Have stronger oxygen uptake and antioxygenic activity.Tannic acid can combine with protein (comprising enzyme) again and form the insoluble mixture simultaneously.Contain more tannic acid in the root of Redsepal Eveningprimrose kind skin, so the tannic acid in the root of Redsepal Eveningprimrose oil cake can play antioxygenation, can combine with the enzyme (protein) in the evening primrose seed again and form mixture, to suppress its vigor, therefore the oxidized chance of the oil residues in the oil cake seldom, its peroxide value is also lower.Tannic acid is to have the very strong hydroaropic substance of polarity.Soluble in water, be insoluble in oil, easily separate fully in the aqueous solution with the finished product Oenothera oil.Therefore its treatment process is simple, grasps easily, and cost is low.Is practicable with tannic acid as the antioxidant of producing refinement of evening primrose oil.It can disposablely be removed impurity very easily oxidized in the Oenothera oil, also oxidized Oenothera oil and free oxygen can be disposed simultaneously.By first kind of processing scheme, can make peroxide value of evening primrose oil drop to 2meg/kg by 15meg/kg, yield can reach 90～93%.By second kind of processing scheme, can make peroxide value of evening primrose oil drop to 2meg/kg by 20meg/kg.Yield can reach 95～97%, and normal hexane consumes 15%.

Major equipment used in the present invention is the enamel still.Top at the enamel still is provided with agitator, in the lower end of enamel still glass is housed and looks pipe.The tannic acid that is adopted can be selected gallotannic acid (gallotannic acid) for use.Solvent can be selected normal hexane (sherwood oil) for use.

Embodiment 1:

At first untreated Oenothera oil 200kg is placed 500 liters enamel still to add tannic acid 2kg and pH value is 60 liters in 8～9 cold boiling water thereupon, stirs 1 hour with 60 rev/mins of rotating speeds, and standing demix is 0.5 hour then.Lower floor's ponding is emitted.Add pH value thereupon again and be 60 liters in 7 cold boiling water, stirred 1 hour with 60 rev/mins rotating speeds, wait to leave standstill 0.5 hour after, emit lower floor's ponding again.So repeat Oenothera oil is washed 4～5 times, till water lotion is neutrality.Emulsion is emitted and dislocation (pending) in another container.The Oenothera oil that will contain moisture content, under the condition of 70 ℃/50mmHg, the residual moisture content that looses is removed in decompression, emits Oenothera oil.In pending emulsion, add 3 times of normal hexanes (sherwood oil) simultaneously to emulsion.Stirred standing demix 0.5 hour 0.5 hour.Emit ponding, reclaim under reduced pressure normal hexane (or sherwood oil) solution is incorporated in the Oenothera oil that is extracted in the treated Oenothera oil again.The processing of decolouring of available in case of necessity activated carbon.To obtain the refinement of evening primrose oil of low peroxide value.

Embodiment 2:

At first the Oenothera oil 100kg with unprocessed mistake places 500 liters enamel still to put into normal hexane 300(or sherwood oil thereupon) litre, after waiting to stir, add tannic acid 1kg and pH value again and be 30 liters in 8～9 cold boiling water.Stirred 1 hour with 60 rev/mins rotating speeds, treat that standing demix after 0.5 hour, emits lower floor's ponding, in the enamel still, add pH value again and be 40 liters in 7 cold boiling water.Stirred 1 hour with 60 rev/mins of rotating speeds, stop to stir, standing demix 0.5 hour is emitted lower floor's ponding.Oenothera oil is washed 4～5 times so repeatedly, till water lotion is neutrality.Emulsion is emitted and dislocation (pending) in another container.The Oenothera oil that will contain normal hexane, under the condition of 70 ℃/50mmHg, solvent and residual moisture content are reclaimed in decompression, emit refinement of evening primrose oil.Add 3 times of normal hexanes to emulsion (or sherwood oil) simultaneously in pending emulsion, stirred 0.5 hour, standing demix 0.5 hour is emitted ponding.Reclaim under reduced pressure normal hexane (or sherwood oil) solution.The Oenothera oil that is extracted is incorporated in the treated refinement of evening primrose oil.The processing of decolouring of available in case of necessity activated carbon is to obtain the refinement of evening primrose oil of low peroxide value.

Claims

1, uses the method for refinement of evening primrose oil with anti oxidant.It is characterized in that at first undressed Oenothera oil 200kg being placed 500 liters the enamel still that agitator is housed, add tannic acid 2kg and pH value thereupon and be 60 liters in 8～9 cold boiling water.Stirred 1 hour, standing demix is 0.5 hour then.Emit lower layer of water, add pH value thereupon again and be 60 liters in 7 cold boiling water.Agitator stirred 1 hour with 60 rev/mins rotating speed, treated that standing demix emits lower floor's ponding again after 0.5 hour, so repeatedly Oenothera oil was washed and handled 4～5 times, and until washing, liquid is till the neutrality.Simultaneously with the emulsion dislocation in another container with pending.Oenothera oil in the enamel still is deducted diffusing, residual moisture content and emits Oenothera oil under the condition of 70 ℃/50mmHg.The processing of decolouring of available in case of necessity activated carbon is to obtain the refinement of evening primrose oil of low peroxide value.

2, the method for seeing leather oil with the refining moon of antioxidant.It is characterized in that, at first undressed Oenothera oil 100kg is placed 500 kilograms the enamel still that agitator is housed.Put into 300 liters of normal hexanes (or sherwood oil) thereupon, after stand-by agitator stirs, add tannic acid 1kg and pH value again and be 30 liters in 8～9 cold boiling water, agitator stirred 1 hour with 60 rev/mins rotating speed, treat that standing demix after 0.5 hour, emits lower floor's ponding.Add pH value again and be 40 liters in 7 cold boiling water in the enamel still, agitator stirred 1 hour with 60 rev/mins of rotating speeds, standing demix 0.5 hour.Emit lower floor's ponding, Oenothera oil is washed 4～5 times so repeatedly, till water lotion is neutrality.With the emulsion dislocation in another container with pending.The Oenothera oil in the enamel still under the condition of 70 ℃/50mmHg, reclaim under reduced pressure normal hexane (or sherwood oil) and part moisture content, and emit Oenothera oil.The processing of decolouring of available in case of necessity activated carbon is to obtain the refinement of evening primrose oil of low peroxide value.

3, according to claim 1 and 2 described methods with refinement of evening primrose oil with anti oxidant, it is characterized in that adding in pending emulsion 3 times of normal hexanes to emulsion (or sherwood oil) utilizes agitator to stir 0.5 hour, standing demix, emit ponding, reclaim under reduced pressure normal hexane (sherwood oil) solution.The Oenothera oil of extracting is incorporated in the treated refinement of evening primrose oil.