{"id":633,"date":"2018-10-24T13:30:22","date_gmt":"2018-10-24T05:30:22","guid":{"rendered":"https:\/\/www.htoilmachine.com\/blog\/?p=633"},"modified":"2018-10-24T13:36:15","modified_gmt":"2018-10-24T05:36:15","slug":"refined-olive-pomace-oil","status":"publish","type":"post","link":"https:\/\/www.htoilmachine.com\/blog\/oil-refining\/refined-olive-pomace-oil\/","title":{"rendered":"Refined Olive Pomace Oil"},"content":{"rendered":"

Olive<\/a> pomace is the pulpy residue from olives after pressing.
\nThe total of olive weight, the pomace 70 \u2013 90 %, the stone 9-27% and the seed about 2-3%.
\nPomace contains about 2-8 % residual oil.
\nOlive pomace oils, obtained by refining of the oil extracted<\/a> from the olive pomace.
\nThe purpose of processing the remaining pulp from olive oil<\/a> production is to produce edible oil<\/a>.
\nOlive pomace should be delivered immediately to the extraction factory (on the same day it is produced) for drying in order to avoid any increases in acidity in the olive-pomace oil.
\nAfter drying, pomace extracted by hexane to yield raw olive-pomace oil
\nRaw olive-pomace oil must be refined to become edible.
\nThe edible product sold as olive-pomace oil is refined olive-pomace oil<\/p>\n

PROCESS STEPS
\n<\/strong>
\n1)DRYING THE POMACE
\n2)EXTRACTION
\n3)DISTILLATION
\n4)REFINING<\/p>\n

 <\/p>\n

FLOWCHART<\/strong><\/p>\n

DRYING<\/strong>
\nHalt the fermentation of the pomace.
\nCarried out by blowing hot air over the pomace in a drum screen.
\nLower the moisture content to around 5-6%
\nThe hot drying gases are used at high
\ntemperatures (400\u00b0C to 700\u00b0C).
\nFinal temperature of finished product not more than 70\u201380 \u00b0C.<\/p>\n

EXTRACTION<\/strong>
\nPreparation of the fatty pulp
\nExtraction with hexane
\nDesolventizing of the extracted pulp
\nTypes of Extractors
\nBatch Extractor
\nPulp placed in an upright reactor
\nand sprayed with the hexane.
\nCommonly used for extraction.
\nContinuous Extractor
\nPulp washed with hexane.<\/p>\n

DISTILLATION<\/strong>
\nDistillation of the oil-hexane mixture (miscella) in a distiller.
\nTry to remove the hexane from the oil as soon as possible at a temperature of around 100\u2013110 oC.
\nThe finished product to be lower than 150 ppm of hexane in oil.
\nWHY DOES IT NEED REFINING ?
\nBecause ;
\nThe crude pomace oil obtained is a high acidity (more than 3% as oleic acid)
\nDark green oil (high chlorophyll content)
\nHigh waxes content
\nUnpleasant odor and taste.<\/p>\n

REFINING<\/strong>
\nDegumming
\nNeutralization
\nBleaching
\nWinterization
\nDeodorization
\nDEGUMMING
\nAchieved by hydrating the gums using 0.1% concentrated phosphoric acid
\nReduction of phospholipid content.
\nPrecipitation with acids.
\nTo remove precipitate.<\/p>\n

NEUTRALIZATION<\/strong>
\nThe crude pomace oil obtained is a high acidity (more than 3% as oleic acid)
\nRemoves nearly all free-fatty acid by converting them into oil-insoluble soaps.
\nThe oil-insoluble soaps are separated by centrifuge in the batch neutralizers.
\nChemical reaction with caustic soda.
\nCaustic soda + Acid Soap + Water<\/p>\n

BLEACHING<\/strong>
\nRemove the unpleasant colors of the alkali neutralized pomace oil
\nThe oil is heated to 100\u2103.
\nStirred with the bleaching earth for 30 min under a vacuum (30-40 mmHg)
\nBleached oil removed from the activated earth and charcoal by filtration.<\/p>\n

WINTERIZATION<\/strong>
\nThe elimination of any compound that might cause the final product to appear cloudy
\nRemoves waxes and high melting triacylglycerols.
\nThe process is based on crystallization (5\u20138 \u2103).
\nIncrease the size of crystals.
\nThe crystals are separated with filtration.<\/p>\n

DEODORIZATION<\/strong>
\nFinal treatment step in the refining process.
\nTreatment of undesirable odours.
\n150 \u2103 to 260 \u2103.
\nSteam is used to better tastes and aromas
\nAbsolute vacuum between 0.2\u2013 0.4 mbar.<\/p>\n

IMPORTANT ANALYSIS<\/strong>
\n1)DETERMINATION of FATTY ACID CONTENTS
\n2)DETERMINATION of WAXES
\n3)DETERMINATION of FREE FATTY ACIDS (FREE ACIDITY)
\n4)DETERMINATION of PEROXIDE VALUE
\n5)DETERMINATION of STIGMASTADIENES
\n6)DETERMINATION of STEROL COMPOSITION
\nGENERIC CHEMICAL COMPOSITION PARAMETERS<\/p>\n","protected":false},"excerpt":{"rendered":"

Olive pomace is the pulpy residue from olives after pressing. The total of olive weight, the pomace 70 \u2013 90 %, the stone 9-27% and the seed about 2-3%. Pomace contains about 2-8 % residual oil. Olive pomace oils, obtained by refining of the oil extracted from the olive pomace. The purpose of processing the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[231,467],"yoast_head":"\nRefined Olive Pomace Oil - Edible Oil Expeller Machinery<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.htoilmachine.com\/blog\/oil-refining\/refined-olive-pomace-oil\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Refined Olive Pomace Oil - Edible Oil Expeller Machinery\" \/>\n<meta property=\"og:description\" content=\"Olive pomace is the pulpy residue from olives after pressing. The total of olive weight, the pomace 70 \u2013 90 %, the stone 9-27% and the seed about 2-3%. Pomace contains about 2-8 % residual oil. 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