(under subclass 16) Subject matter having at least one carbocyclic ring, usually six-membered, which is resonating or is characterized by three conjugated double bonds.
(1) Note. Azulene (Fig. 1) is considered to be aromatic. [figure] [caption]FIGURE 1. Azulene
(2) Note. Naphthalene (Fig. 1), dihydronaphthalene (Fig. 2), and tetrahydronaphthalene (Tetralin) (Fig. 3), are aromatic, but decahydronaphthalene (Decalin) (Fig. 4) is alicyclic [figure] [caption]FIGURE 1. Naphthalene [figure] [caption]FIGURE 2. dihydronaphthalene [figure] [caption]FIGURE3. tetrahydronaphthalene (Tetralin) [figure] [caption]FIGURE 4.decahydronaphthalene (Decalin)
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319+, for a synthesis process involving serial diverse conversions leading to production of a recoverable aromatic compound.
400+, for synthesis of an aromatic compound.
804+, for a process for purifying an aromatic compound by plural diverse serial separations. 827+, and 831, for a purification process in which an aromatic compound is sorbed by a solid sorbent.
