12505 running status 12505 train 12505 train running status north east ex today's time of northeast express up northeast sf express running status.
Refining is the process of reducing the impurities in a substance. You can't turn crude oil into gasoline without first refining it. Refining is nowadays most commonly associated with the processing of petroleum products such as oil and gas, but it also applies to precious metals, especially those used in jewelry. Sugar is another substance that undergoes refining, which makes it less grainy and more consistent.
For other uses, see Refinery (disambiguation) . A refinery is a production facility composed of a group of chemical engineering unit processes and unit operations refining certain materials or converting raw material into products of value.he image below is a schematic flow diagram of a typical oil refinery depicting various unit processes and the flow of intermediate products between the inlet crude oil feedstock and the final products.