stearin


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stearin

(stēr`ĭn), fat that is the triglyceridetriglyceride,
ester formed from glycerol and one to three fatty acids. Fats and oils are triglycerides. In a simple triglyceride such as palmitin or stearin, all three fatty-acid groups are identical.
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 of stearic acid, CH3(CH2)16CO2H, i.e., the tristearate ester of glycerol. It is a white crystalline solid at ordinary temperatures and is insoluble in water and very slightly soluble in alcohol. It is found (often mixed with palmitinpalmitin
, fat that is the triglyceride of palmitic acid, CH3(CH2)14CO2H, i.e., the tripalmitate ester of glycerol. It is a white crystalline solid at ordinary temperatures, insoluble in water but soluble in ethanol and ether.
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) in many hard fats and oils, e.g., in tallow, suet, butterfat, cottonseed oil, and olive oil. It is used in making soap and candles.

Stearin

 

technical-grade stearic acid; a mixture of the higher fatty carboxylic acids, mainly stearic and palmitic acids. Stearin is a semitransparent white or yellowish substance that is greasy to the touch. Depending on the source, it has a melting point between 53° and 65°C; its density is 0.92 g/cm3 (20°C). It is obtained by the distillation of hydrolysates of animal fats with subsequent crystallization and pressing or by the hydrogenation of unsatu- rated acids from vegetable oils. Stearin is used in the production of candles, usually in a mixture with paraffin.

stearin

[′stir·ən]
(organic chemistry)
C3H5(C18H35O2)3 A colorless combustible powder; insoluble in water, soluble in alcohol, chloroform, and carbon disulfide; melts at 72°C; used in metal polishes, pastes, candies, candles, and soap, and to waterproof paper. Also known as glyceryl tristearate; tristearin.
References in periodicals archive ?
The processing of palm oil-based cooking oil would turn out by products RBD Stearin (Refined Bleached Deodorized Stearin), and PFAD (Palm Fatty Acids Destillation).
Effect of Cu and palm stearin coating on ammonia volatilization of Urea.
No palm stearin was found at fish culture zones or in their vicinity today.
Related industries not yet developed include Palm Kernel Cake, Crude Palm Fatty Acid, RBD Palm Kernel Stearin, Metallic Salt, Polyethoxylate Derivatives, Fatty Amines, Fatty Amide, Soaps, Animal feed, Glycerol, Glycerin.
Some cooking oil factories in the country uses the dry process, CPO processing in the country generally will turn out CPO with a 73% content of olein, 22% of stearin and 5% of PFAD.
Supply of 600 tons palm stearin and 800 tons palm oil for the company's factories.
The company, which plans to operate in coconut oil processing industry, will have an annual capacity of 333,000 tons of refined bleached deodorized olein, 85,500 tons of refined bleached deodorized stearin and 22,500 tons of palm fatty acid distillation.
Two momarsa for the supply of (a) 500 tons palm oil, 600 tons palm stearin & 100 tons palm core oil, also (b) 500 tons imported yellow dent corn required for the hydrogenation factories.
Two tenders for the supply of (a) different type filters & filter lining for vehicles, also (b) chemicals, stearin & palm oil.
5 kg 0 40 25 17 0 0 packase Crude Paim Stearin 35 25 20 15 0 0 RBD Stearin 30 20 10 17 0 0 Crude Palm Kernel Oil 35 50 30 20 0 0 RBD PKO 35 40 20 15 0 0 Crude Coconuts Oil 20 20 15 0 0 0 RBD CNO 15 15 10 0 0 0 * Effective until now Source: Department of Finance Table-2 Indonesia's production of CPO, 1997-2001 Year Production Growth ('000 tons) (%) 1997 5,380 -- 1998 5,100 -4.
Three tenders for the supply of (a) 500 tons palm stearin & 300 tons palm oil, (b) 500 tons sodium tri polyphosphate, also (c) 6,000 tons silicate sand for Cairo factories.
The company plans to operate in agro industry with an annual capacity to produce 3,000 tons of RBD palm oil, 3,000 tons of RBD olein and 76,932 tons of RBD stearin and 26,208 tons of PFAD.