Method for preparing edible oil
First Claim
1. A process of extracting oil from vegetable seeds comprising the steps ofmechanically expelling crude oil from the vegetable seeds to produce vegetable seed cakes and mechanically expelled crude oil,separating the mechanically expelled crude oil from the cakes,passing the separated mechanically expelled crude oil through a layer of the separated cakes produced in the expelling step to filter sediment from the mechanically expelled crude oil, andchemically extracting crude oil from the cakes after said passing step is performed by flowing a solvent through the layer of cakes.
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Abstract
Oil is extracted from vegetable material, such as cottonseed, rapeseed, safflower seed, sunflower seed, and linseed, by mechanically expelling crude oil from the vegetable material and then chemically extracting crude oil from the pulp cakes produced in the expelling step by using a suitable solvent. After the expelling step the oil is separated from the cakes and, thereafter, the mechanically expelled crude oil is passed through a layer of the cakes prior to at least a portion of chemical extraction to filter fine sediment from the expelled oil and thus eliminate separate fine sediment filtering steps of the mechanically expelled crude oil.
26 Citations
6 Claims
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1. A process of extracting oil from vegetable seeds comprising the steps of
mechanically expelling crude oil from the vegetable seeds to produce vegetable seed cakes and mechanically expelled crude oil, separating the mechanically expelled crude oil from the cakes, passing the separated mechanically expelled crude oil through a layer of the separated cakes produced in the expelling step to filter sediment from the mechanically expelled crude oil, and chemically extracting crude oil from the cakes after said passing step is performed by flowing a solvent through the layer of cakes.
Specification