The decarboxylation of unsaturated fatty acids leads to hydrogenated products. J prasetyo, adiarso, s d s murti, s p senda, s m rfdh, y e prada, e oktariani. The primary objective of this work was to study the pyrolytic conversion of mono unsaturated fatty acids to hydrocarbon products for use as renewable chemicals and fuels. Wear self contained breathing apparatus and protective clothing to prevent contact with skin and eyes. Stearic acid is most commonly used in the manufacture of soap, detergent, shampoo, shaving cream and other cosmetic products. Both are saturated fatty acids but stearic acid c 18 has more molecular weight than palmitic acid c 16 hence more melting point. Molecular weight increases with number of carbons and hence chain length of the fatty acid. Batch pyrolysis of stearic acid was conducted over a range of temperatures. Only select registry of toxic effects of chemical substances rtecs data is presented here. Distillation of natural fatty acids and their chemical derivatives. Stearic acid noctadecanoic acid was chosen as a model compound for the free fatty acids liberated through the hydrolysis of beef tallow. Alkyl ketene dimers akds are a family of organic compounds based on the 4 membered ring.
In contrast, the colonyforming ability of rat fibroblasts was not inhibited and that of human foetal lung fibroblasts was inhibited at a higher dose than that required to inhibit human tumour cell lines. Keeping that in mind, we investigated the role of stearic acid on physicchemical properties of oleogel. Stearic acid is a saturated fatty acid with an 18carbon chain widely used as lubricants, softening and release agents in food production. Pirojshanagar, eastern express highway, vikhroli, mumbai 400 079. Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Decarboxylation and decarbonylation of stearic acid download. In ketonic decarboxylation carboxylic acids are converted to ketones. Rimpex rubber supplies stearic acid with grade 1800, 1802, 1840, 1850.
Production of hydrocarbons by catalytic cracking of stearic acid. Stearic acid ethoxylates are generally used as emulsifiers in oilinwater type creams and lotions. Pdf continuous hydrothermal decarboxylation of fatty acids and. Alkyl ketene dimers akds are a family of organic compounds based on the 4membered ring. Heterogeneous catalytic deoxygenation of stearic acid for. Msds sections changed since last revision of document include. Acme hardesty chemicals msds of stearic acid disclaimer the information presented here is believed to be accurate and pertains only to the product when stored in a sealed.
Pyrolytic decarboxylation and cracking of stearic acid industrial. It is employed in the manufacture of candles, cosmetics. Myristic acid investigated as a mutagen, natural product, and primary irritant. In addition, there are small players involved in the manufacturing of stearic acid spread across various geographies. Pyrolytic decarboxylation and cracking of stearic acid. Continuous hydrothermal decarboxylation of fatty acids and their. Commercial stearic acid is a mixture of approximately equal amounts of stearic and palmitic acids and small amounts of oleic acid. Magnesium stearate, which is a salt that contains magnesium and stearic acid, is used as a flow agent in supplements. Stearic acid inhibited the colonyforming ability of 4 out of 5 rat and two human tumour continuous cell lines in vitro. In this situation it is mostly used to form a stable base, which helps to bind and thicken the products. Primary functions of stearic acid in cell culture systems. Chemistry and physics of lipids 142 2006 2332 stearic acid solubility and cubic phase volume walter f. It also has a high melting temperature, which means it wont run when left on the body for. This indicates that the moal2o3 catalyst led to some cracking of.
Canada whmis classifications of substances d2a revision number. Reeves iii animal and natural resources institute, beltsville agricultural research center, ars, usda, beltsville, md 20705, united states. Pdf pyrolytic decarboxylation and cracking of stearic. Stearic acid, also called octadecanoic acid, one of the most common longchain fatty acids, found in combined form in natural animal and vegetable fats. Ca1043 stearic acid safety data sheet chemical associates.
The salts and esters of stearic acid are called stearates. Stearic acid is a naturallyocurring saturatedfatty acid used as an emulsifier and emollient. Stearic acid is a c 18 fatty acid and palmitic acid is c 16 fatty acid. Solubility of stearic acid in various organic solvents and. The hazard fields include special hazard alerts air and water reactions, fire hazards, health hazards, a reactivity profile, and details about reactive groups assignments and potentially incompatible absorbents. Stearic acid and its derivatives have been used as gelators in food and pharmaceutical gel formulations. Wear selfcontained breathing apparatus and protective clothing to prevent contact with skin and eyes. However, the data is provided without any warranty, expressed or. As a lubricant, stearic acid can be used in a wide variety of industries including. Continuous low pressure decarboxylation of fatty acids to. Co being produced via decarbonylation or thermal cracking of the fatty acids. After strong heating organic crack products can be generated.
It is synthesized by the hydrolysis of animal fat or from hydrogenation of cottonseed or vegetable oil. How to prepare the solution of palmitic acid or stearic acid. Its created by treating oil with water at high temperatures, going through the hydrogenation process. The information in cameo chemicals comes from a variety of data sources. Oleic acid cis9octadecenoic acid was selected as a model mono unsaturated compound. Pyrolysis of lard was performed to produce a diesellike liquid and a high heating. Fatty acids, tallow, hydrogenated, stearic acid fraction.
Catalytic deoxygenation of fatty acids and their derivatives. Catalytic cracking of stearic acid ffa was carried out at atmospheric pressure to obtain short chain hydrocarbons for petrochemical. Undecylenic acid is produced by cracking of castor oil under pressure. But shape is only one of the properties that stearic acid adds to cleansers such as bar soaps and body washes. Stearic acid stearic acid functions as an anionic oilinwater emulsifier. This material, like most materials in powder form is capable of creating a dust explosion.
A surfactant is a compound that helps reduce waters surface tension, allowing it to mix with oils and dirt on the surface of your skin. Distillation of natural fatty acids and their chemical. The model compound stearic acid is deoxygenated to heptadecane, originating from th. We would like to show you a description here but the site wont allow us. This ketene is generated by pyrolysis of stearoyl chloride. Stearic acid diethanolamide chemical information, properties, structures, articles, patents and more chemical data. Stearic acid conversion in supercritical water with and without additives. As well as in the diet, it is used in hardening soaps, softening plastics and in making co smetics, candles and plastics. Stearic acid revision 1 revision date 08042015 h315 causes skin irritation. Decarboxylation is simply the removal of co 2 from a fatty acid chain, normally with the assistance of a catalyst. In a pyrolytic study of decarboxylation and cracking of stearic acid, maher et al. Stearic acid is triple pressed, kosher and food grade, the fatty acids from vegetable source is an excellent thickener and emulsion stabilizer for lotions and creams where stearic acid also improves the silkiness and glide of emulsions.
Controlled products regulations and the msds contains all the information required by the controlled products regulations. Brief information on the uses and side effects of stearic acid. Fatty acids are esterified to a glycerol backbone to form a group of compounds known as mono, di and tri glycerides neutral fats. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Extreme high moderate low section 1 chemical product and company identification product name stearoyl ethanolamide statement of hazardous nature considered a hazardous substance according to osha 29 cfr 1910. Why stearic acid has more melting point than oleic acid. Bdo is a mixture of simple aldehydes, alcohols, and acids. This combination often results in considerable decarboxylation and polymerization with. Ca1030 triple pressed stearic acid safety data sheet. Depending on the reaction media and type of catalyst used 15, 16, 17, decarboxylation can potentially produce in situ hydrogen, although the mechanism is unclear. It is widely used in personal care products such as soaps, creams, lotions. Stearic acid market global industry analysis, size and.
Their hydrophilicity or lipophilicity depends on the number of ethylene oxide units present. These small pastilles are ideal as an emulsifying agent in creams, lotions, deodorants, and most natural body care recipes. If ingested, seek medical advice immediately and show the container or. The primary objective of this work was to study the pyrolytic conversion of fatty acids to produce deoxygenated, liquid hydrocarbon products for. The information in stearic acid msds was obtained from current and reliable sources. It has also been used as an emulsifying agent in intravenous infusions.
Itsfound in many saturated oils like palmand coconut. Cracking of the allylic c c bond is preferred due to lower bond dissociation energy as a result of the double bond compare to the c c bond adjacent to the carboxyl group. Likewise, the pd nanoparticles dispersed over the zeolitic support favored the conversion of light olefins formed by endchain cracking reactions into gasoline. However, the mechanism pertaining to the stearic acid based gelation has not been deciphered yet.
As a surfactant, stearic acid is a powerful cleanser source. Stearic acid emulsifying thickener with softening effect. Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. The primary objective of this work was to study the pyrolytic conversion of fatty acids to produce deoxygenated, liquid hydrocarbon products for use as renewable chemicals or fuels.
Stearic acid is a saturated monobasic acid with 18 carbonchain lengths. This nutrineat writeup provides more information on the uses and side effects of stearic. Commercial stearic acid is a mixture of stearic acid with palmitic and myristic acid. Studies suggest that stearic acid suppresses immune cells called t cells. List of chemicals reported for the 2012 chemical data. Stearic acid is a white, waxy, natural acid found in animal and vegetable fats. Our stearic acid is from vegetable origins palm and is manufactured and designed to blend well with your cosmetic recipes. Stearic acid msds,stearic acid materials safety data sheet. See actual entry in rtecs for complete information. Stearic acid investigated as a mutagen, natural product, primary irritant, and tumorigen. It is a waxy solid and its chemical formula is c 17 h 35 co 2 h.
While decarboxylation was the first step in saturated fatty acid pyrolysis, during the pyrolysis of oleic acid both deoxygenation and cracking of the allylic c c bonds occur simultaneously. Stearic acid also makes an effective additive to improve the stiffness in stick products, soy candles, and the like. Stearic acid, 90% safety data sheet according to federal register vol. Stearoyl ethanolamide sc205515 hazard alert code key. Identification of the substance or mixture and the company or undertaking.
1272 1301 1314 934 1506 1533 247 232 330 847 897 1136 47 284 821 643 345 310 303 1399 727 601 573 1379 940 1447 776 1057 698 817 1242 105 430 397 292 1196