Process for extracting native products which are not water-soluble from native substance mixtures by centrifugal force

A process for obtaining native, organic substances in the form of oils, fats and waxes and their derivatives from native substance mixtures, comprising:

• finely comminuting a starting mateaial of the native substance mixtures;
• and
• working the finely comminuted native substance mixtures into an aqueous suspension with the addition to the mixtures of water, for mixtures having insufficient water, and at least one water-soluble organic solvent in a proportion to render the suspension separable in one step in a centrifugal field into (a) an aqueous phase containing solid components and substantially all of the solvent at least to a major part, and (b) a clean and emulsion-free liquid organic phase containing the substances.
• wherein the aqueous phase has a higher density than the organic phase,
• wherein acid-binding substances for binding free fatty acids are added, and the suspension is subjected to a centrifugal field, and
• wherein the starting material has a lower content of free fatty acids than the expected oil loss in the non-oil components separated by the centrifuging, and a member from the group consisting of free fatty acids and their salts is added before the centrifuging.

A process for obtaining native, organic substances in the form of oils, fats and waxes and their derivatives from native substance mixtures, comprising:

• finely comminuting a starting material of the native substance mixtures;
• and
• working the finely comminuted native substance mixture into an aqueous suspension with the addition to the mixtures of water, for mixtures having insufficient water, and at least one water-soluble organic solvent in a proportion to render the suspension separable in one step in a centrifugal field into (a) an aqueous phase containing solid components and substantially all of the solvent, and (b) a clean and emulsion-free liquid organic phase containing the substances to be obtained,
• wherein the aqueous phase has a higher density than the organic phase, and
• wherein the substance mixtures are dried oleaginous fruit, the organic solvent is an alcohol containing alcoholate, the alcoholate is an acid-binding substance for binding free fatty acids, and the alcoholate is a catalyst for transesterification of neutral oil present with the alcohol, and wherein the amounts of alcoholate and alcohol are increased for the additional catalyzing action and the transesterification, respectively, relative to the amounts of alcoholate and alcohol needed as the acid-binding substance and the water-soluble solvent.

A process for obtaining native, organic substances in the form of oils, fats and waxes and their derivatives from fish material, comprising:

• finely comminuting a starting material of the fish material;
• working the finely comminuted fish material, which has an unreduced original content of oil, fat and wax, into an aqueous suspension,
• said aqueous suspension being prepared with the addition of water, for fish material having insufficient water, and with the addition of at least one water-soluble organic solvent in an amount of 15% by weight to 50% by weight of the liquid in the aqueous suspension,
• the aqueous suspension being subjected to a one-step centrifugal action without any further addition of said water-soluble organic solvent prior to said subjection,
• wherein said amount of said water-soluble organic solvent is selected such that said one-step centrifugal action produces two liquid phases of different densities separated by a clear phase boundary, including an emulsion-free liquid organic phase containing the substances to be obtained and being substantially free of said water-soluble organic solvent and an aqueous phase containing separated solid components and substantially all of the water-soluble organic solvent, the emulsion-free liquid organic phase having a lower density than the aqueous phase;
• and removing said separated emulsion-free liquid organic phase from said aqueous phase to obtain said native, organic substances.

A process for obtaining native, organic substances in the form of oils, fats and waxes and their derivatives from native substance mixtures other than fish material, comprising:

• finely comminuting a starting material of the native substance mixtures;
• working the finely comminuted native substance mixtures, which have an unreduced original content of oil, fat and wax, into an aqueous suspension,
• said aqueous suspension being prepared with the addition of water, for native substance mixtures having insufficient water, and with the addition of at least one water-soluble organic solvent in an amount of 5% by weight to 75% by weight of the liquid in the aqueous suspension,
• the aqueous suspension being subjected to a one-step centrifugal action without any further addition of said water-soluble organic solvent prior to said subjection,
• wherein said amount of said water-soluble organic solvent is selected such that said one-step centrifugal action produces two liquid phases of different densities separated by a clear phase boundary, including an emulsion-free liquid organic phase containing the substances to be obtained and being substantially free of said water-soluble organic solvent and an aqueous phase containing separated solid components and substantially all of the water-soluble organic solvent, the emulsion-free liquid organic phase having a lower density than the aqueous phase;
• and removing said separated emulsion-free liquid organic phase from said aqueous phase to obtain said native, organic substances.