Process for dedusting solids-containing hydrocarbon oils
Very finely divided particulate solids are removed from unconventional whole heavy petroleum crudes, heavy petroleum crude fractions, and residua, syncrudes and syncrude fractions, particularly shale oil and shale oil fractions, by the use of novel surface active agents. The surface active agent is characterized as an admixture of (I) a surfactant comprised of (A) an ethoxylated or propoxylated ester, or ester constituted of a 1,4 sorbitan skeleton to which at least one and up to three ethoxy, propoxy, or mixed ethoxy-propoxy, and at least one and up to three fatty acid substitutents are attached through oxygen to the 2,3,5 and 6 carbon atoms; and preferably this compound (A), or mixture thereof, is further admixed with (B) an organo sulfonic acid; and more preferably an admixture of (B) an organo sulfonic acid and (C) an ammonium ion substituted, a substituted ammonium ion substituted, or alkali metal substituted sulfonate. In its more preferred form, the surfactant (I) is admixed with (II) a demulsifier which is characterized as an ethoxylated, propoxylated, or mixed ethoxylated/propoxylated phenol formaldehyde resin substituted at a position para to said ethoxy and/or propoxy group, or groups, with a hydrocarboyl group. The surface active agent is admixed with the solids-containing oil, and in a first stage the mixture is emulsified with water, and heated, the novel surface active agent causing transfer of solids to the aqueous phase. An oil phase of reduced solids content is recovered from the first stage, and in a second stage it is again admixed with water, emulsified, heated, and then passed to an electric coalescar wherein a clean oil product suitable for use in refining operations is recovered.
- Assignee:
- Exxon Research and Engineering Co.
- Patent Number(s):
- US 4407707
- OSTI ID:
- 5494083
- Resource Relation:
- Patent File Date: Filed date 24 Aug 1981; Other Information: PAT-APPL-295799
- Country of Publication:
- United States
- Language:
- English
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04 OIL SHALES AND TAR SANDS
PETROLEUM
CLEANING
SHALE OIL
SYNTHETIC PETROLEUM
DEASHING
DUSTS
PARTICLES
REMOVAL
SURFACTANTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
MINERAL OILS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
SYNTHETIC FUELS
020400* - Petroleum- Processing
040400 - Oil Shales & Tar Sands- Oil Production
Recovery
& Refining