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Characteristics of Naphthas

Naphthas constitute a special category of petroleum solvents whose boiling points correspond to the class of white-spirits (see paragraph 6.1). [Pg.275]

They are classified apart in this text because their use differs from that of petroleum solvents they are used as raw materials for petrochemicals, particularly as feeds to steam crackers. Naphthas are thus industrial intermediates and not consumer products. Consequently, naphthas are not subject to governmental specifications, but only to commercial specifications that are re-negotiated for each contract. Nevertheless, naphthas are in a relatively homogeneous class and represent a large enough tonnage so that the best known properties to be highlighted here. [Pg.275]

Two types of specifications are written into supply contracts for naphthas they concern the composition and the level of contaminants. [Pg.275]

Composition is normally expressed by a distillation curve, and can be supplemented by compositional analyses such as those for aromatics content. Some physical properties such as density or vapor pressure are often added. The degree of purity is indicated by color or other appropriate test (copper strip corrosion, for example). [Pg.275]

Sometimes analyses are required for particular compounds such as sulfur, chlorine and lead, or for specific components such as mercaptans, hydrogen sulfide, ethers and alcohols. [Pg.275]


Gas oil cracking has all of the characteristics of naphtha cracking. The typical statistics are given in Table 9.4. Relative to naphtha, the gas oil cracking requires considerably more feed for the same ethylene output (500 kt/y) and at the same time produces increased volumes of pyrolysis gasoline and more particularly pyrolysis fuel oil. This requires an increase in the fixed capital to naphtha for the same scale of operation. [Pg.172]

Physical Properties and Spectral Characteristics of Naphtha[ 1,8-bc]thiete and Its S-Oxides (34-36)... [Pg.13]

TABLE 1 Typical Retention Characteristics of Naphtha Components... [Pg.787]


See other pages where Characteristics of Naphthas is mentioned: [Pg.275]   


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