acid value


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acid value

n
(Chemistry) the number of milligrams of potassium hydroxide required to neutralize the free fatty acid in one gram of a fat, oil, resin, etc
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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Noun1.acid value - (chemistry) the amount of free acid present in fat as measured by the milligrams of potassium hydroxide needed to neutralize itacid value - (chemistry) the amount of free acid present in fat as measured by the milligrams of potassium hydroxide needed to neutralize it; "as the glycerides in fat slowly decompose the acid value increases"
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
definite quantity - a specific measure of amount
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Property Standard method CCO Density, 20[degrees]C (kg/[m.sup.3]) ASTM D4052 925.7 Kinematic viscosity, 38[degrees]C ASTM D445 35.20 ([mm.sup.2]/s) Acid value (mg KOH/g oil) ASTM 664 2.30 Iodine value (g I/100 g oil) AOCS Cd1-25 107.4 Flash point (K) ASTM D93 509 Pour point (K) ASTM D97 285 Cloud point (K) ASTM D2500 279 Carbon residue (wt.%) ASTM D4530 0.27 Cetane number ASTM D613 37.4 High heating value (MJ/kg) ASTM D240 39.56 Sulfur content (wt.%) ASTM D5453 0.009 Ash content (wt.%) ASTM D482-91 0.009 Distillation temp.
The amount of free acid exist in fat as evaluated by the milligrams of potassium hydroxide needed to neutralize it; as the glycerides in fat degraded the acid value increases.
The physical and chemical characteristics of oils and fats Parameter Spring Winter Rapeseed Used for variety variety oil frying oil Camelina Camelina oil oil Density (15[degrees]C), 925 926 917 904 kg/[m.sup.3] Viscosity 0.03 0.029 0.014 0.04 (40[degrees]C), Pa * s Acid value % (m/m) 0.26 0.76 0.52 6.4 Iodine value g [I.sub.2] 164.6 169.6 98 60.3 /100 g Oxidation stability, h 8.23 7.7 9.5 3.4 FAME composition % Saturated: 15.3 15.1 4.7 38.2 C14:0 0.5 0.4 n.
The resulting oil was found to have density 0.913 g/cm3, refractive index 1.4722, kinematic viscosity 41.2 mm2 /sec, saponification value 189.7 mg/g, acid value 8.98 mg/g, iodine value 50.8 g I/100g oil and peroxide value 29.7 mEq/kg.
flash point, cetane number and acid value will be examined in the future work.
Also the properties of oil, diesel and bio diesel for rice bran oil such as acid value, flash and fire point etc., were determined and compared.
Suitable for the food industry, the analyzer carries out pH, acid value, chloride, vitamin C and other analyses without operator intervention.
The Freeport plant will reportedly be another milestone in BASF's strategy of strengthening its acrylic acid value chain by continuously enhancing product quality, availability and competitiveness.
The stearic acid content in the HA 89 x CAS-3 [F.sub.2] population ranged from 40 to 260 g [kg.sup.-1], showing an average stearic acid value of 111 g [kg.sup.-1] (Fig.
The most ideal have proven to be those low acid value acrylics and cellulose esters that produce solutions with low viscosities (in the range of 35-45 seconds Zahn #2) at correspondingly high solids.