Determination of Unsaturateds in Lubricating Oils<sup>1</sup>: A Modification of the Francis Method

The authors have been unable to find any aromatic, naphthene, or paraffin hydrocarbon in the gasoline or kerosene boiling range that reacts with bromine under the conditions of the procedure. In the higher boiling range anthracene reacts and it is expected that some of the anthracene derivatives will behave in a similar manner.Stilbene and related olefins add bromine slowly because of steric effects. Fortunately, compounds of this type do not appear to be present in petroleum products.Conjugated diolefins yield low results for two double bonds and high results for one double bond. Cyclopentadiene gives close to the theoretical value for one double bond. Inasmuch as this procedure was intended primarily for mono-olefins, no attempt was made to work out a procedure that would yield accurate results for t-his type of olefin.The method if used for cracked products boiling sufficiently high to include anthracene and its derivatives cannot be interpreted in terms of olefin content.Since satisfactory results have been obtained on practically all types of olefins, it is believed that the procedure as written is adequate for use on the olefins present in gasoline, kerosene, and gas oil samples. It is least satisfactory for highly branched olefins.

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Determination of Unsaturateds in Lubricating Oils¹: A Modification of the Francis Method

Cited by 3 publications

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Schmierstoffe

Schmierstoffe

Determination of Bromine Number of Olefinic Hydrocarbons

Benzoyl Peroxide in Organic Media

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Determination of Unsaturateds in Lubricating Oils1: A Modification of the Francis Method

Cited by 3 publications

References 0 publications

Schmierstoffe

Schmierstoffe

Determination of Bromine Number of Olefinic Hydrocarbons

Benzoyl Peroxide in Organic Media

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Product

Resources

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Determination of Unsaturateds in Lubricating Oils¹: A Modification of the Francis Method