deasphalter bottoms
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English[edit]
Noun[edit]
deasphalter bottoms pl (plural only)
- A mixture of tar and asphalt that is produced as a byproduct of the deasphalting process.
- 2014, R Luque, J Speight, Gasification for Synthetic Fuel Production, →ISBN:
- The deasphalter unit is usually placed after the vacuum distillation tower, where, by the use of a low-boiling liquid hydrocarbon solvent, such as propane or butane under pressure, the insoluble asphalt-like product (deasphalter bottoms) is .separated from the feedstock.
- 2015, James G. Speight, Fouling in Refineries, →ISBN, page 210:
- Propane (or sometimes propane/butane mixtures) is extensively used for deasphalting and produces a deasphalted oil (DAO) and deasphalter bottoms (propane deasphalter asphalt, PDA, PD tar) (Dunning and Moore, 1957).