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Other thermal-cracking processes

In crude oil refining, the visbreaker process, the delayed coking process (see Chapter 13.1.2) and thermal cracking are used in the middle-temperature range to convert heavy petroleum residues into lighter gasoline fractions and middle distillates. The aromaticity of the fractions recovered, however, is relatively low. [Pg.83]

Raw material Louisiana crude oil residue Relative density 15/15 °C Conradson carbon wt% [Pg.84]

Wide variations in pressure, temperature and residence time, as well as in feedstock material, are possible with visbreaking by thermal cracking. [Pg.85]

1 Light-oil tubular furnace 2 Heavy-oil tubular furnace 3 Reaction chamber 4 Flash chamber 5 Distillation colunm 6 Side column [Pg.85]

The cracker tar which is generated by this process is suitable as feedstock for production of premium coke in the delayed coker the gasoline quality is somewhat better than that of coker naphtha. [Pg.85]

The other thermal cracking process is visbreaking. This is a milder thermal process and is mainly used to reduce the viscosities and pour points of vacuum residues to... [Pg.10]

Product yields (Table 8-1) indicate that there is no coke. The distillates produced by this process are generally lower in the content of olefin hydrocarbons than the other thermal cracking process, comparatively easy to desulfurize in hydrotreating units, and compatible with straight run distillates. [Pg.321]

Gums Conjugated diolefins and other olefinic compounds formed during catalytic and thermal cracking processes heterocyclic compounds present in fuel can also initiate gum formation... [Pg.26]

Other Routes. A unique process that produces vinyl chloride, trichloroethylene, dichloroethane, and trichloroethane simultaneously has been developed by Produits Chemiques Pechiney-Saint-Gobain in France (31). Dichloroethylene is chlorinated directly at low temperature to tetrachloroethane, which is then thermally cracked to give trichloroethylene and hydrochloric acid. The dichloroethylene feed is coproduced with vinyl chloride in a hot chlorination reactor, using chlorine and ethylene as feedstocks. [Pg.24]

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