acid sludge

acid sludge

[′as·əd ‚sləj]
(chemical engineering)
The residue left after treating petroleum oil with sulfuric acid for the removal of impurities.
References in periodicals archive ?
Chemical characteristics of coastal acid sulfate soil, mine site acid sulfate soil, seawater-neutralised red mud, and sewage sludge used in the Australian component of this study Parameter Coastal Mine site Bauxsol[TM] Sewage potential acid sludge acid sulfate sulfate soil soil PH (A) 6.
Remove and dispose of acid sludge from four sulfuric acid
On June 22, 1992, the Rhone-Poulenc facility was damaged when hydrocarbon ignited following a spill of sulfuric acid sludge.