Abstract
The most acceptable method for processing raffinates to improve their antiknock properties is selective hydrocracking. As a result of selective cracking of the straight-chain paraffinic hydrocarbons present in raffinates, an octane number gain of 15-20 may be achieved. The authors list certain process indexes for selective hydrocracking of 62-105/sup 0/C cut (benzene-toluene) and 105-140/sup 0/C cut (xylene). It is shown that the improvement of the antiknock properties of raffinates by selective hydrocracking may change the structure of automotive gasoline production quite substantially.
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