Catalytic cracker bottoms distillate

Aromatic Pitches from the Asphaltene-Free Distillate Fraction of Catalytic Cracker Bottoms... 

This chapter describes the preparations and characteristics of highly aromatic and highly anisotropic pitches from the distillate fraction of catalytic cracker bottoms (CCB). CCB is the aromatic residue from a catalytic cracking process. 

Catalytic Cracker Bottoms (CCB) which is the heavy residue from the catalytic cracking of petroleum distillate is a common aromatic feedstock used for synthetic carbons and pitch production. CCB, like other heavy aromatic feedstock, is composed of alkyl-substituted polycondensed aromatics with a very wide molecular weight distribution. 

Figure 3 Crude fractionation (crude distillation, three stages). An atmospheric fractionating stage produces lighter oils. An initial vacuum stage produces lube oils. A second vacuum stage fractionates bottoms from the other stages to produce asphalt and catalytic cracker feed. (From Ref. 5.)...

Petroleum pitch can be obtained from a wide variety of sources such as from the bottoms of catalytic crackers, steam cracking of naphtha and gas oils, and residues from various distillation and refinery processes. The crude product is given an initial refining process, which can include one, or a combination of, several treatments ... 

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