Paraffins Sentence Examples
The principal elements are found in various combinations, the hydrocarbons of the Pennsylvania oils being mainly paraffins (q.v.), while those of Caucasian petroleum belong for the most part to the naphthenes, isomeric with the olefines (q.v.).
Paraffins are found in all crude oils, and olefines in varying proportions in the majority, while acetylene has been found in Baku oil; members of the benzene group and its derivatives, notably benzene and toluene, occur in all petroleums. Naphthenes are the chief components of some oils, as already indicated, and occur in varying quantities in many others.
Natural gas is found to consist mainly of the lower paraffins, with varying quantities of carbon dioxide, carbon monoxide, hydrogen, nitrogen and oxygen, in some cases also sulphuretted hydrogen and possibly ammonia.
The product actually obtained is a mixture of several paraffins and several olefines.
The same difference attends the introduction of the methyl group into many classes of compounds, for example, the paraffins, olefines, acetylenes, aromatic hydrocarbons, alcohols, aldehydes, ketones and esters, while a slightly lower value (157.1) is found in the case of the halogen compounds, nitriles, amines, acids, ethers, sulphides and nitro compounds.Advertisement
In their phy s ical properties, the olefines resemble the normal paraffins, the lower members of the series being inflammable gases, the members from C5 to C14 liquids insoluble in water, and from C16 upwards of solids.
In chemical properties, however, they differ very markedly from the paraffins.
The haloid esters of the paraffin alcohols formed by heating the alcohols with the halogen acids are the monohaloid derivatives of the paraffins, and are more conveniently prepared by the action of the phosphorous haloid on the alcohol.
Lanolin, linseed oil, wax, spermaceti, &c., also belong to this group. The paraffins, glycerin and vaseline, although not fats, have much the same effect when applied externally, but they are not nutritive.
It has been suggested that the admixture of large quantities of decomposed freshwater algae among the original mud is the origin of the paraffins.Advertisement
June 1995 to March 1999 July 1999 Leatherhead Food Research Association Analysis of chlorinated paraffins and chlorinated paraffins and chlorinated solvents in foods.
It provides general information, scientific information and details of associated issues for chlorine, chlorinated solvents and chlorinated paraffins.
Paints The main substances of concern likely to be found in paints are alkyl phenol ethoxylates, chlorinated paraffins and phthalates.
Many of them contain alcohols, paraffins, phosphates and other ingredients that could trigger skin reactions.