acid value

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Related to Acid number: Iodine number

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
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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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References in periodicals archive ?
CMS's system has been tested on the most widely used EALs including esters and poly alkyl glycols (PAGs) and has been shown to remove water and lower the total acid number (TAN) (in the case of esters) without depleting performance additives.
Each lubricant was first analyzed for moisture content and Total Acid Number (TAN).
The determination of the binder acid number showed that the bitumen acid content was increased by 30-35 % under the influence of the microwave field.
These new test methods are: ASTM D664 (for acid number of petroleum products by potentiometric titration), ASTM D5291 (for instrumentation determination of carbon, hydrogen, and nitrogen in petroleum products and lubricants), and ASTM D5622 (for determination of total oxygen in gasoline and methanol fuels by reductive pyrolysis).
Henkel has received a patent for a waterborne adhesive comprised of 1 to 50 weight percent of a (meth)acrylate copolymer the copolymer having an acid number from 0 to 150 mgKOH/g, 2 to 30 weight percent of natural polymers, selected from the group consisting of starch, dextrin, cellulose, and proteins, 0.
Resins composed of acid number equaling 40 had a different amount of acrylic acid present to obtain the desired acid value.
Functional group test, decrease in iodine number, increase in acid number and IR spectra confirms the sulfonation on the benzene ring (probably at ortho and para positions).
Furthermore the source said that the new fields produce less acidic crude but cautioned that it is too soon to say what the total acid number (TAN) would be.
Additional laboratory tests indicated that changes in conductivity closely matched variations in a chemical signature known as total acid number, a sign of oil quality.
Periodic oil changes eliminate carbon formation by keeping the acid number low.