Vegetable oils sources

Rating Inherent Oxidative Stability Vegetable Oil Source Calculated Iodine Value Total Double Bonds... 

The USPNF 23 describes lecithin as a complex mixture of acetone-insoluble phosphatides that consists chiefly of phosphatidylcholine, phosphatidylethanolamine, phosphatidylser-ine, and phosphatidylinositol, combined with various amounts of other substances such as triglycerides, fatty acids, and carbohydrates as separated from a crude vegetable oil source. 

Much of the current interest in biodiesel production comes from vegetable oil sources such as soybean (in the USA), canola oil (in Canada) and rapeseed oil (in Europe) because the vegetable oil producers are faced with excess production capacity, product surpluses, and declining prices. 

In temperate regions, oilseed rape (Brassica napus L.) and turnip rape (Brassica campestris L.) predominate, while in the semitropics of Asia B. campestris and Indian mustard [Brassica juncea (L.) Czern.] are major vegetable oil sources. The English word rape, as it applies to the oilseed forms of B. campestris and B. napus, has arisen from the Latin word rapum, meaning turnip. The word mustard was derived from the European practice of mixing the sweet "must" of old wine with crushed seeds of black mustard [Brassica nigra (L.) Koch.] to form a hot paste, "hot must" or "mustum ardens", hence the modern term mustard (Hemingway, 1976). 

Figure 3.14 Schematic diagram of conventionai chemical processing of vegetable oils. Source [22],...

Vegetable oils were eventually replaced by petroleum-based hydrocarbons. More recently, diesel fuel has been developed from vegetable oil sources that are derivatives of the fatty acids in the oils. Vegetable oils from soybeans and other biological sources are used to make biodiesel fuel as discussed in the following paragraph. 

A few fatty acids with trans double bonds (trans fatty acids) occur naturally but the major source of trans fats comes from partial hydrogenation of vegetable oils m for example the preparation of margarine However the same catalysts that catalyze the... 

Industrial lecithins from a variety of sources ate utilized (Tables 2 and 3). The main sources include vegetable oils (eg, soy bean, cottonseed, corn, sunflower, tapeseed) and animal tissues (egg and bovine brain). However, egg lecithin and in particular soy lecithin (Table 4) ate by fat the most important in terms of quantities produced. So much so that the term soy lecithin and commercial lecithin ate often used synonymously. 

A primary source of environmental pollution from printing ink comes from the metal-based pigments used, as well as various resins, waxes, and drying agents that are also part of the inks. These materials are added to inks regardless of the source of the oil. As a result, petroleum inks are just as suitable for landfill disposal under U.S. EPA regulations as are vegetable oil inks. 

Fats and oils are treated as commodities in the open market and are purchased in bulk. As commodities, their prices fluctuate with supply and demand. Furthermore, fats and oils come in different grades that reflect different levels of processing and have industry-standardized specifications such as the American Fats and Oil Association. In the manufacture of soap in the United States, the source of animal fats is domestic whereas the vegetable oils are frequently obtained from Southeast Asia, primarily Malaysia and the Philippines. 

Unesterified tocopherols are found in a variety of foods however, concentration and isomer distribution of tocopherols vary gready with source. Typically, meat, fish, and dairy contain <40 mg/100 g of total tocopherols. Almost all (>75%) of this is a-tocopherol for most sources in this group. The variation in the content of meat and dairy products can be related to the content of the food ingested by the animal. A strong seasonal variation can also be observed. Vegetable oils contain significant levels of y-, P-, and 5-tocopherol, along with a-tocopherol (Table 3). 

Although vegetable oils and animals fats were commonly used in ancient times, most higher acids were not known until the beginning of the nineteenth century. Then the nature of the naturally occurring 18-carbon fatty acids was estabHshed, and hundreds of long-chain fatty acids have been isolated from natural sources and characterized. 

Many similar hydrocarbon duids such as kerosene and other paraffinic and naphthenic mineral oils and vegetable oils such as linseed oil [8001-26-17, com oil, soybean oil [8001-22-7] peanut oil, tall oil [8000-26-4] and castor oil are used as defoamers. Liquid fatty alcohols, acids and esters from other sources and poly(alkylene oxide) derivatives of oils such as ethoxylated rosin oil [68140-17-0] are also used. Organic phosphates (6), such as tributyl phosphate, are valuable defoamers and have particular utiHty in latex paint appHcations. Another important class of hydrocarbon-based defoamer is the acetylenic glycols (7), such as 2,4,7,9-tetramethyl-5-decyne-4,7-diol which are widely used in water-based coatings, agricultural chemicals, and other areas where excellent wetting is needed. 

Lubricants are not generally regarded as being corrosive, and in order to appreciate how corrosion can occur in lubricant systems it is necessary to understand something of the nature of lubricants. Once, lubricants were almost exclusively animal or vegetable oils or fats, but modern requirements in the way of volume and special properties have made petroleum the main source of supply. In volume, lubricants now represent about 2% of all petroleum products in value, considerably more. 

Chemicals from animal and vegetable oils are known as fatty acid products. Obviously, a renewable source. 

Small amounts of trans-unsamrated fatty acids are found in ruminant fat (eg, butter fat has 2-7%), where they arise from the action of microorganisms in the rumen, but the main source in the human diet is from partially hydrogenated vegetable oils (eg, margarine). Trans fatty acids compete with essential fatty acids and may exacerbate essential fatty acid deficiency. Moreover, they are strucmrally similar to samrated fatty acids (Chapter 14) and have comparable effects in the promotion of hypercholesterolemia and atherosclerosis (Chapter 26). 

Use of renewable feedstocks is most likely where they can compete economically with petrochemically derived materials. This already happens in many areas, and it is sometimes forgotten that even in a world that seems to be dominated by chemicals and materials from fossil carbon and other non-renewable sources, industry already uses annually 19.8 MT of vegetable oils, 22.5 MT starch, 28.4 MT of plant fibres and 42.5 MT of wood pulp. These all compete on price and performance with synthetic alternatives. 

Development of Alternate Fuels for Transportation, Electrical Power Generation and various Industrial Processes (e.g., biodiesel from renewable sources such as vegetable oils). 

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