In fact most gold mining companies mine "near gold" or sort of close to gold mixtures. They then take the ore and smelt it. Part of the smelting process is separating out the gold from the other metals that are likely to be present. For example gold and silver are frequently found together. Those are then separated and sold.
Very much like the P2O initial output, "near diesel", which is then separated into diesel and gasoline. Now that the additional condenser has been installed, the P2O output is separated during the production process. So it is no longer correct to classify the P2O output as "near diesel", but rather as diesel and gasoline.
Hope this clarifies things for you.
There's none so blind as he who will not see.