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Title: Dewatering of petroleum-containing sludges with recovery of the oil component

Abstract

A process is disclosed for dewatering petroleum-containing sludges by a two-stage method using finely divided additives and organic flocculants, wherein (a) finely divided additives, such as ash, coal, sand or mixtures of these, in a free-flowing form or as an aqueous suspension, are homogeneously dispersed in the petroleum-containing sludge, in an amount such that the total solids content of the resulting mixture is from 10 to 30% by weight, especially from 12 to 20% by weight, (b) this sludge mixture is treated with an aqueous solution of an organic flocculant, preferably of anionic nature, (c) the greater part of the sludge water is removed by gravity filtration, (d) the pre-dewatered sludge mixture is treated with an aqueous solution of aluminum salts or trivalent iron salts and (e) this mixture is substantially dewatered by pressure filtration, in the course of which the greater part of the petroleum present is also removed.

Inventors:
; ;
Publication Date:
OSTI Identifier:
5358739
Patent Number(s):
US 4417976
Assignee:
BASF Aktiengesellschaft (Germany, Federal Republic of)
Resource Type:
Patent
Resource Relation:
Patent Priority Date: Priority date 14 Jan 1981, Germany, Federal Republic of (F.R. Germany); Other Information: PAT-APPL-333416
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; PETROLEUM; RECOVERY; SLUDGES; WATER REMOVAL; ADDITIVES; AQUEOUS SOLUTIONS; ASHES; COAL; FILTRATION; FLOCCULATION; SAND; CARBONACEOUS MATERIALS; DISPERSIONS; ENERGY SOURCES; FOSSIL FUELS; FUELS; MATERIALS; MIXTURES; PRECIPITATION; REMOVAL; RESIDUES; SEPARATION PROCESSES; SOLUTIONS; 020800* - Petroleum- Waste Management

Citation Formats

Sander, B, Hovemann, F, and Scherling, K. Dewatering of petroleum-containing sludges with recovery of the oil component. United States: N. p., 1983. Web.
Sander, B, Hovemann, F, & Scherling, K. Dewatering of petroleum-containing sludges with recovery of the oil component. United States.
Sander, B, Hovemann, F, and Scherling, K. Tue . "Dewatering of petroleum-containing sludges with recovery of the oil component". United States.
@article{osti_5358739,
title = {Dewatering of petroleum-containing sludges with recovery of the oil component},
author = {Sander, B and Hovemann, F and Scherling, K},
abstractNote = {A process is disclosed for dewatering petroleum-containing sludges by a two-stage method using finely divided additives and organic flocculants, wherein (a) finely divided additives, such as ash, coal, sand or mixtures of these, in a free-flowing form or as an aqueous suspension, are homogeneously dispersed in the petroleum-containing sludge, in an amount such that the total solids content of the resulting mixture is from 10 to 30% by weight, especially from 12 to 20% by weight, (b) this sludge mixture is treated with an aqueous solution of an organic flocculant, preferably of anionic nature, (c) the greater part of the sludge water is removed by gravity filtration, (d) the pre-dewatered sludge mixture is treated with an aqueous solution of aluminum salts or trivalent iron salts and (e) this mixture is substantially dewatered by pressure filtration, in the course of which the greater part of the petroleum present is also removed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {11}
}