Abstract: The invention relates to a process for the manufacture of diesel range hydrocarbons wherein a feed is hydrotreated in a hydrotreating step and isomerised in an isomerisation step, and a feed comprising fresh feed containing more than 5 wt % of free fatty acids and at least one diluting agent is hydrotreated at a reaction temperature of 200-400° C., in a hydrotreating reactor in the presence of catalyst, and the ratio of the diluting agent/fresh feed is 5-30:1.

Abstract: A method of removing glycidyl esters from a vegetable oil comprises contacting the oil with at least 0.5% by weight of the oil of an acid-activated bleaching earth and deodorising the oil at a temperature of less than 200° C. for a time of at least 30 30 minutes.

Abstract: The present invention is directed to processes for preparing oil compositions having a high concentration of poly-unsaturated fatty acids and oil compositions having a low concentration of ?-linolenic acid. In addition, the present invention is directed to processes for preparing oil compositions having advantageous stability characteristics.

Abstract: A method for manufacturing a refined fat or oil, including: carrying out a first steam treatment of bringing a fat or oil into contact with water vapor; subsequently carrying out a treatment of bringing the fat or oil into contact with an adsorbent; and further carrying out a second steam treatment of bringing the fat or oil having a temperature lower by 10° C. or more than a temperature of the fat or oil in the first steam treatment into contact with water vapor.

Abstract: Provided is a method for manufacturing refined fats and oils with less by-products, good taste and flavor and hue, and reduced smoke generation. The method for manufacturing refined fats and oils includes: (1) carrying out an adsorption treatment of bringing fats and oils into contact with clay (A) and at least one kind of alkaline earth metal salt (B) selected from the group consisting of an oxide, a carbonate, and a silicate of an alkaline earth metal; and (2) subsequently carrying out a deodorization treatment of bringing the resultant fats and oils into contact with water vapor at 180° C. or less.

Abstract: [Problem] Provided are a combined product comprising an edible-oil purifying agent and a container, and a purification method of edible oil using the same. [Solution] The combined product comprises the edible-oil purifying agent and the container for enclosing the edible-oil purifying agent, the container including a non-woven fabric bag and a stainless steel casing, which accommodates the at least one bag, which has many pores, and which is provided with a stainless steel handle. The combined product is used by being placed into and taken out from the edible oil in an oil bath. In use, the enclosed edible-oil purifying agent is contacted with the heated edible oil in the oil bath.

Abstract: The present invention is directed to processes for preparing oil compositions having a high concentration of poly-unsaturated fatty acids and oil compositions having a low concentration of ?-linolenic acid. In addition, the present invention is directed to processes for preparing oil compositions having advantageous stability characteristics.

Abstract: Methods and systems for producing both purified triacylglycerides and fatty acid-monohydric alcohol esters from a feed material comprising vegetable oil or animal fat with elevated levels of free fatty acids is disclosed. Various embodiments include adsorptive techniques.

Abstract: A method of purifying a biodiesel fuel by contacting the biodiesel fuel with at least one adsorbent material, such as magnesium silicate. Such method removes impurities, such as soap, formed during the production of biodiesel fuels.

Abstract: The present invention relates to a process for the isolation of oryzanols from rice bran oil soap stock by (a) saponifying the oil present in soap stock with an alkali followed by neutralisation of the excess alkali, (b) converting the soap stock into anhydrous, porous soap noodles, (c) extracting the soap noodles with an organic solvent, (d) crystallising the crude unsaponifiable matter to remove impurities, (e) subjecting the residue to column chromatography to obtain an oryzanol rich fraction, and (f) recrystallising the oryzanol rich fraction using an organic solvent to obtain pure oryzanol.

Abstract: A process and composition for removing trace contaminants from glyceride oils utilizes a metal-substituted silica xerogel having a pH of at least 7.5 to adsorb at least a portion of the contaminants. The process of the invention includes contacting a glyceride oil with such an adsorbent and then separating the adsorbent from the contaminant-depleted glyceride oil, for example, by filtration. The composition of the present invention includes a metal-substituted silica xerogel having a pH of at least 7.5 and an organic acid blended with the xerogel. Preferably, the organic acid is citric acid. Contaminants which can be removed from glyceride oils during the refinement of such oils by the adsorbent include phospholipids, soaps, detrimental metals, and chlorophyll.

Abstract: A method of refining and manufacturing a fat and oil containing polyunsaturated fatty acids which prevents production of peculiar fishy smells when such a fat and oil is added to food materials and while it is stored by preventing oxidation of PUFA's and restraining conversion of odor-emanating precursors into odor-emanating substances. A fat and oil, such as a marine animal oil, containing polyunsaturated fatty acids with 18 or more carbon atoms and three or more double bonds such as EPA and DHA is alkali refined and bleached. The thus alkali refined and bleached fat and oil is refined by bringing 100 parts by weight of it into contact for 10 minutes or more at 5.degree.-80.degree. C. with not less than 0.1 part by weight of powdered or granulated diatomaceous earth formed by calcining with a flux added such as sodium carbonate or sodium chloride. The fat and oil thus obtained is filtered and deodorized by steam distillation under vacuum.

Abstract: The invention relates to a method of refining glyceride oil comprising the step of degumming said glyceride oil, wherein said degumming step is followed by a separation step in which undissolved and non-centrifugable particles are removed from said degummed oil. Preferably said degumming step is followed by a step of holding the degummed oil for such a period of time and under such temperature conditions as to cause agglomeration of said undissolved particles, and for an agent promoting the formation of undissolved particles and/or promoting the agglomeration of the undissolved particles is added to the oil.

Abstract: A process for removing chlorophyll color impurities from vegetable oils, the process comprises:i) dispersing a source of phosphoric acid in vegetable oil to form a mixture having a moisture content of less than 0.1% by weight which mixture is maintained at a temperature in the range of 70.degree. C. to 160.degree. C. until a precipitate containing chlorophyll color impurities is formed; andii) at any time thereafter during conventional oil processing up to and including the removal of bleaching clay from the oil, separating the precipitated material from the oil to remove the chlorophyll color impurities with the precipitated material.

Abstract: A modified physical adsorption process is described in which small quantities of caustic are added to glyceride oils, fatty chemicals or wax esters having an FFA level sufficient to create about 20 to 3,000 ppm soaps. The soaps, together with impurities, are removed by adsorption onto amorphous silica.

Abstract: The invention relates to a method of refining glyceride oil comprising the step of degumming said glyceride oil, wherein said degumming step is followed by a separation step in which undissolved and non-centrifugable particles are removed from said degummed oil. Preferably said degumming step is followed by a step of holding the degummed oil for such a period of time and under such temperature conditions as to cause agglomeration of said undissolved particles, and for an agent promoting the formation of undissolved particles and/or promoting the agglomeration of the undissolved particles is added to the oil.

Abstract: Adsorbents are provided which are suitable for use in the removal of contaminants selected from the group consisting of free fatty acids, soaps, phosphorus, metal ions and color bodies. The adsorbents comprise inorganic porous supports selected from the group consisting of substantially amorphous alumina, diatomaceous earth, clays, magnesium silicates, aluminum silicates and amorphous silica, treated with a base in such a manner that at least a portion of said base is retained in at least some of the pores of the support to yield base-treated inorganic porous adsorbents. Processes for removing free fatty acids, etc., from glyceride oils using these adsorbents are also provided.

Abstract: The invention relates to a method for refining glyceride oil, comprising the steps of:i) acidifying the oil with an acid;ii) partially neutralizing the acidified oil with alkali;iii) contacting the partially neutralized oil with an amorphous silica; andiv) removing solids from the glyceride oil.Preferably, water is removed from the mixture comprising the glyceride oil and the amorphous silica before any solids are removed.

Abstract: Adsorbents comprising amorphous silicas with effective average pore diameters of up to about 5000 Angstroms are useful in processes for the removal of soaps and phospholipids (along with associated metal ions) from caustic treated, primary centrifuged, water-wash centrifuged or caustic refined glyceride oils.