What are removed by hydroisomerization for dewaxing and post-refining respectively?
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What is the function of removing each one respectively? Thank you
Hydroisomerization for pour point reduction involves isomerizing long-chain alkyl hydrocarbons into isomeric alkanes in order to lower the pour point, while refining deals with the saturated residual aromatics
It is generally a component of lubricant base oil, subjected to hydroisomerization refining. Due to the hydrogenation conditions of the catalyst and adherence to the principles of normal carbocation reactions, the products are mostly isomers, which can achieve dewaxing and the reduction of the freezing point; generally, the refining stage is used for demetallization and dealkenylation.