IS 1448 Pt.43-1967

标准号：IS 1448 Pt.43-1967
发布日期：1967/5/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：1.1 This method is intended for the determination of the bromine number of liquid petroleum products substantially free from butanes and butenes. It is generally applicable to liquid petroleum products that fall in the following limits:90 Percent Distillation Point, °C Bromine Number,Max (see Note)Under 205 115205 to 327 15The bromine number does not correspond necessarily to a true content of unsaturates, since sulphur compounds and certain polycyclic aromatic hydrocarbons are reported to react with bromine.Note — These limits are imposed since true precision of the method has been determined only up to these bromine numbers.1.1.1 The reported behaviour of the main hydrocarbon types is as follows:Hydrocarbon Type Level of Bromine Number Obtainedwith Pure Reference CompoundsParaffins Zero bromine numberStraight-chain olefins TheoreticalBranched-chain olefins Mostly higher than theoreticalCyclic olefins TheoreticalNon-conjugated dienes Not assessedNon-conjugated cyclic dienes TheoreticalHydrocarbon Type Leυel of Bromine Number Obtainedwith Pure Reference CompoundsConjugated dienes Lower than theoreticalAromatics with unsaturated Not assessedside chainsAromatics, monocyclic Zero bromine numberAromatics, bicyclic Zero bromine numberAromatics, polycyclic Mostly higher than theoreticalNaphthenes Zero bromine number