Winterization cottonseed oil

Synonyms cas 8001-29-4 deodorized winterized cottonseed oil Coumarone-Indene Resin... 

CAS 8001-29-4 EINECS/ELINCS 232-280-7 Synonyms Aceite de Algodon Cotton oil Cottonseed oil Cottonseed oil, winterized Deodorized winterized cottonseed oil Gossypium Oleum Gossypii seminis... 

Deodorized winterized cottonseed oil. See Cottonseed (Gossypium) oil Deoiled lanolin. See Lanolin wax Deoxycholate sodium. See Sodium desoxycholate... 

Cloud Point. An empirical cloud point analysis is performed by stirring a sample of fat while it is being cooled until the oil has clouded enough to block a light beam of known intensity. Both cloud point and congeal point values are more closely related to consistency than melting points. A definite relationship exists between the cloud point results and the solid fat index values at 92°F or 33.3°C. Cottonseed oil that has not been winterized or hydrogenated will have a cloud point of 30°F to 38°F or —1.1°C to 3.3°C. Winterized cottonseed salad oil, with the hard fraction removed, will have a cloud point of approximately 22°F to 26°F or —5.6°C to -3.3°C. 

Winterization. When cottonseed oil is designed for use as salad oil, it must be winterized, that is, a considerable portion of the more saturated glycerides must be removed so that the material will remain clear when exposed to reduced temperatures, such as those likely to be encountered with refrigeration. If the saturated glycerides in cottonseed oil are not removed, it will solidify at temperatures encountered in a refrigerator 45 °F or 7.2 °C. The composition of the products resulting from winterization of cottonseed oil are presented in Table 17 (127). The solid-fat fraction that settles out is referred to as the stearine. 

Cottonseed Oil Product Unwinterized Cooking Oil Winterized Salad Oil Winterized Stearine... 

Salad Oil. An edible oil that is suitable for the production of a mayonnaise or salad dressing emulsion, which will remain liquid at refrigerated temperatures 40°F or 4.4°C. This requirement has been refined to require a minimum cold test of 5 and one-half hours this measurement requires that a sample of the oil remain clear and brilliant while submerged in an ice bath. Cottonseed oil must have a portion of the saturated triglycerides removed to meet the requirements of a salad oil winterization is the process normally used to produce a cottonseed salad oil. 

Some processors have employed solvent fractionation systems to produce salad oil, which has three major advantages over the product obtained by traditional winterization. These are (i) a considerably lower viscosity, which allows a faster crystal growth for more rapid stearin separation (ii) the salad oil produced has a better resistance to clouding at cool temperatures for longer cold tests and (iii) less liquid oil is trapped in the stearin component giving higher salad oil yields. An operational continuous solvent process was described by Cavanagh (1961) for winterization of cottonseed oil. 

The designation "winterizing" is a carryover from the days when cottonseed oil was left outside in the winter to allow the higher melting portion to solidify for subsequent removal by filtration. The liquid portion was used in the manufacture of salad dressing and mayonnaise. These products, which are oil-in-water emulsions, are usually stored in the refrigerator. If fat crystals... 

Cottonseed oil, winterized. See Cottonseed (Gossypium) oil Coumadin. See Warfarin 2-Coumarate. See o-Hydroxycinnamic acid Coumaric acid. See Coumarin 2-Coumaric acid o-Coumaric acid. See o-Hydroxycinnamic acid cis-o-Coumaric acid lactone. See Coumarin Coumarin... 

The disaturated triglycerides partially crystallize as the oil temperature is lowered to 5-10 °C. Cottonseed oil is for this reason dry-fractionated or winterized to produce oleins which remain liquid at lower temperatures and can be used as salad oils. 

Miscella refining (Cavanagh, 1976) is a special case of continuous caustic soda refining. The most favourable conditions for the process are those of the solvent extraction plant where it is also desired to refine the oil and perhaps further process it by winterization. For this reason cottonseed is the oil most usually processed in this manner. The miscella from the extraction plant is evaporated to the desired oil hexane proportion, approximately 65 35 in the case of cottonseed oil. The corrected miscella is then pretreated with phosphoric acid, neutralized and the soapstock centrifugally separated as for the normal 100% oil process. Soapstock separation is very efficient and therefore the miscella does not need to be washed. The solvent is evaporated from the refined oil and the oil is bleached and deodorized. The process is capable of giving higher yields of refined oil and improved colour of the bleached oil by comparison with non-miscella refined oils. 

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