De-asphalter

A de-asphalter is a unit in a crude oil refinery or bitumen upgrader that separates asphalt from crude oil or bitumen.

The de-asphalter unit is usually placed after the vacuum distillation tower. It is usually a solvent de-asphalter unit, SDA. The SDA separates the asphalt from the feedstock because light hydrocarbons will dissolve aliphatic compounds but not asphaltenes. The output from the de-asphalter unit is de-asphalted oil ("DAO") and asphalt.

DAO from propane de-asphalting has the highest quality but lowest yield, whereas using pentane may double or triple the yield from a heavy feed, but at the expense of contamination by metals and carbon residues that shorten the life of downstream cracking catalysts.^[1] If the solvent is butane the unit will be referred to as a butane de-asphalter ("BDA") and if the solvent is propane, it will be called a propane de-asphalter ("PDA") unit.

References

• Study of selected petroleum refining residuals by US EPA
• Lubricants and Lubrication (Second Edition)

1. ^ John J. McKetta (1992). Petroleum Processing Handbook. CRC Press. p. 536. ISBN 9780824786816. http://books.google.com/books?id=Xlqsr_K59mcC&pg=PP1&dq=McKetta,+John+J.+Petroleum+Processing+Handbook.. 

External links

• Solvent de-asphalting
• Solvent de-asphalting of vacuum residuum
• Asphalt used for gasification

This industry-related article is a stub. You can help Wikipedia by expanding it.v · Categories: Chemical engineering Distillation Petroleum technology Petroleum stubs Industry stubs Wikimedia Foundation. 2010. Игры ⚽ Нужно решить контрольную? Edith Rigby Sonic the Hedgehog Boom Look at other dictionaries: asphalter — [ asfalte ] v. tr. <conjug. : 1> • 1866; de asphalte ♦ Recouvrir d asphalte. Asphalter un trottoir. ⇒ bitumer , goudronner. P. p. adj. Une route asphaltée. ● asphalter verbe transitif Couvrir d asphalte. ● asphalter (synonymes) verbe… …   Encyclopédie Universelle asphalter — asˈphalter noun A person who lays asphalt • • • Main Entry: ↑asphalt …   Useful english dictionary Solvent de-asphalter — A solvent de asphalter is a unit in a crude oil refinery that separates the asphalt from the processing crude oil using the fact that light hydrocarbons will solve the remainder of the crude oil, but not the asphaltens in the crude. The output… …   Wikipedia asphaltage — [ asfaltaʒ ] n. m. • 1866; de asphalter 1 ♦ Action d asphalter (une rue, un trottoir). 2 ♦ Revêtement d asphalte. Un asphaltage lisse. ● asphaltage nom masculin Action d asphalter. ● asphaltage (synonymes) nom masculin Action d asphalter.… …   Encyclopédie Universelle De-asphalted oil — De asphalted oil, DAO is a crude oil refinery process stream. It is the main stream out of a de asphalter unit in a crude oil refinery. The other stream out from the de asphalter is the asphalt. The de asphalter unit is usually a solvent de… …   Wikipedia asfalta — ASFALTÁ, asfaltez, vb. I. tranz. A acoperi un drum, un teren etc. cu un strat de asfalt (2). – Din fr. asphalter, germ. asphaltieren. Trimis de cata, 15.02.2004. Sursa: DEX 98  asfaltá vb., ind. prez. 1 …   Dicționar Român De-asphalting unit — A de asphalting unit separates the asphalt from the rest of the crude oil residue. The de asphalter unit is usually placed after the vacuum tower in a crude oil refinery. The process is often referred to as a solvent de asphalter, SDA. And the… …   Wikipedia asphalteur — ⇒ASPHALTEUR, EUSE, subst. I. Asphalteur. Ouvrier qui étend de l asphalte : • Il [M. Joyeuse] devenait ce flâneur qu on rencontre (...) s approchant pour se chauffer des poêles en plein air où fume le goudron des asphalteurs... A. DAUDET, Le Nabab …   Encyclopédie Universelle Ewan MacColl — (25 January, 1915 22 October, 1989) was a British folk singer, songwriter, socialist, actor, poet, playwright, and record producer. He was the father of singer Kirsty MacColl. Early history MacColl was born James (Jimmie) Henry Miller in… …   Wikipedia Beeston railway station — Infobox UK station name = Beeston code = BEE caption = Beeston Station in 2004 manager = East Midlands Trains locale = Beeston borough = Broxtowe start = 1839 platforms = 2 usage0405 = 0.331 usage0506 = 0.337 usage0607 = 0.368|Beeston railway… …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”