Synthetic aromatic pitch

We fractionated CCB by a high vacuum distillation into several distillate fractions and undistlllable residue. The distillate fractions were subjected to a two-stage high temperature thermal process to convert them to aromatic pitches. The composition of the pitches produced was determined by a solvent analysis to define their suitability for synthetic carbon production. 

Trimesic acid is also referred to as 5-carboxyisophthahc acid [554-95-0] trimesinic acid, or trimesitinic acid. It is a smaH-volume, synthetic chemical and is sold commercially. Traces of trimesic acid as well as other aromatic carboxyUc acids with three or more carboxyUc acid groups are found in lignite (137), and when various types of coals or coal components such as brown coal, asphaltene, or coal-tar pitch are oxidized. 

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. 

Pitch is a carbonaceous solid that consists primarily of a complex mixture of polycyclic aromatic compounds [14]. Petroleum pitches are residues of crude oil distillation or of catalytic cracking of petroleum distillates. Coal tar pitches are products of the distillation of coal, whereas synthetic pitches are residues of the treatment of other organic substances. Irrespective of origin, all pitch products have complex chemical compositions. 

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