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Bromine numbers

This method follows the ASTM D 1159 and D 2710 procedures and the AFNOR M 07-017 standard. It exploits the capacity of the double olefinic bond to attach two bromine atoms by the addition reaction. Expressed as grams of fixed bromine per hundred grams of sample, the bromine number, BrN, enables the calculation of olefinic hydrocarbons to be made if the average molecular weight of a sufficiently narrow cut is known. [Pg.83]

The reactivity of polyo efins to bromine addition may not be complete or it can depend on the relative positions of the double bonds and the branching within the molecules provoking steric hindrance to addition. [Pg.83]

Chapter 3. CHARACTERIZATION OF CRUDE OlLS AND PETROLEUM FRACTIONS [Pg.84]

For chemical processes, some examples are the elimination of aromatics by sulfonation, the elimination of olefins by bromine addition on the double bond (bromine number), the elimination of conjugated diolefins as in the case of the maleic anhydride value (MAV), and the extraction of bases or acids by contact with aqueous acidic or basic solutions. [Pg.26]

Benzene content Aniline point Bromine number... [Pg.307]

American Petroleum Institute atmospheric residue atmospheric residue hydroconversion American Society for Testing and Materials Association pour la Valorisation des Huiles Lourdes Anstalt fur Verbrennungskraftmaschinen List Bureau of Mines Correlation Index bromine number... [Pg.499]

Numerous methods for the deterrnination of monomer purity, including procedures for the deterrnination of saponification equivalent and bromine number, specific gravity, refractive index, and color, are available from manufacturers (68—70). Concentrations of minor components are deterrnined by iodimetry or colorimetry for HQ or MEHQ, by the Kad-Eisher method for water, and by turbidity measurements for trace amounts of polymer. [Pg.165]

When simple Hquids like naphtha are cracked, it may be possible to determine the feed components by gas chromatography combined with mass spectrometry (gc/ms) (30). However, when gas oil is cracked, complete analysis of the feed may not be possible. Therefore, some simple definitions are used to characterize the feed. When available, paraffins, olefins, naphthenes, and aromatics (PONA) content serves as a key property. When PONA is not available, the Bureau of Mines Correlation Index (BMCI) is used. Other properties like specific gravity, ASTM distillation, viscosity, refractive index. Conradson Carbon, and Bromine Number are also used to characterize the feed. In recent years even nuclear magnetic resonance spectroscopy has been... [Pg.434]

Bromine number ASTM D 1159-84. The bromine number is defined as the amount of bromine in grams accepted by 100 grams of resin. Typical values are ... [Pg.615]

Brom-wasserstoffsaure, /. hydrobromic acid, -wismut, tn. n. bismuth bromide, -zahl, /. bromine number, -zink, n. zinc bromide, -zinn, n. tin bromide. [Pg.83]

Bromine number (ASTM D-1159) and bromine index (ASTM D-2710) are qualitative methods to measure the reactive sites of a sample. Bromine reacts not only with olefm bonds, but also with basic nitrogen molecules and with some aromatic sulfur derivatives. Neverthele.ss. olefins are the most common reactive sites and the bromine number is used to indicate olefinicity of the feed. [Pg.50]

The bromine number is the number of grams of bromine that will react with 100 grams of the sample. Typical bromine numbers are ... [Pg.50]

A general rule-of-thumb is that the olefin fraction of the sample is one-half of its bromine number. [Pg.50]

Purification of industrial oils, kerosene/jet fuel, lubricating oils Mono- dicumyldiphenylamine Mono- dioctyldiphenylamine Dimer fatty acids Purification of xylenes Improvement of bromine number of recycle cumene in phenol plants Improvement of bromine number of recycle ethylbenzene in styrene plants based on liquid pha.se oxidation Alkylation of xylenes with diisobutylenes to mono-/ rr-butyI derivatives Phenyl xylyl ethane... [Pg.134]

Most methods used for analysis of alkenes, such as bromination and hydrogenation, can be employed to determine the number of double bonds in polyenes. These methods were also employed to classify various petroleums ( bromine number ). However, these classical methods are employed less in analysis of conjugated dienes and polyenes mostly because the products produce a less informative mixture than in the alkene case. [Pg.496]

Bromine number the number of grams of bromine absorbed by 100 g of oil, which indicates the percentage of double bonds in the material. [Pg.325]

The effect of hydrotreating on the bromine number (olefinic content) of the catalytic cracker products is shown in Figures 11 and 12. The bromine numbers for gasoline and LCO fractions were measured directly using ASTM procedure D 1159. For the HCO, the bromine number could not be measured because of procedural problems. For the low severity cracking case. Figure 11, the... [Pg.299]

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