The Republic of Bashkortostan Institute of Petrochemical Refining (formerly BashNII NP) has traditionally considered problems of increasing the quality of asphalt products, developing asphalt technologies, and different materials based on asphalt for more than four decades. It is sufficient to say that most asphalt units in oil refineries in Russia and many CIS countries were designed and built based on the Institute's developments.The problems of increasing the quality of paving asphalts processed in industry enterprises and local consumer units have been discussed for years.However, the manufacturer can rarely guarantee high and stable quality of asphalts even today. There are many causes of this, but the fundamental one is the quality of the feedstock processed. The fluctuations in the quality characteristics of the feedstock over several days can be very important even in the same company. The quality of commercial asphalts will correspondingly vary relatively perceptibly over the same days, frequently going beyond the limits of the requirements of the active standard. For this reason, the problem of minimizing the dependence of the quality of the final product on the quality of the processed feedstock is very pressing.We will examine several variants of solving this problem with respect to the individual asphalt technologies developed at the Institute.
The possibility of obtaining petroleum pitches from heavy pyrolysis resin, the heavy distillate formed in production of pitch from heavy pyrolysis resin, and heavy catalytic gasoil is examined. The composition and physicochemical properties of the petroleum pitches obtained and the intermediate products from the process are investigated. The important possibility of obtaining isotropic fiber-forming petroleum pitches with a yield of 20-23.1 wt. % from heavy pyrolysis resin in a unit with an intermittent reactor is demonstrated.
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