Liquid sludge disposal process

• US 4,786,401 A
• Filed: 09/25/1987
• Issued: 11/22/1988
• Est. Priority Date: 09/25/1987
• Status: Expired due to Fees

• Current Assignee: Mobil Oil Corporation (Exxon Mobil Corporation)
• Original Assignee: Mobil Oil Corporation (Exxon Mobil Corporation)
• Inventors: Jacob, Solomon M., Tracy, William J. III, Karsner, Grant G.
• Primary Examiner(s): MCFARLANE, ANTHONY R
• Application Number:
  US07/101,092
• Time in Patent Office: 424 Days
• Field of Search: 208/13, 208/127, 208/113, 208/126, 208/85, 208/125, 208/180, 208/181, 208/187, 585/240
• US Class Current: 208/85
• CPC Class Codes: C10G 11/18 according to the "fluidised-bed" technique
• CPC Class Codes: C10L 1/322 Coal-oil suspensions

Abstract

Hydrocarbon-containing liquid waste sludges from refinery waste streams can be disposed of by blending with the feedstock being passed to a fluid catalytic cracking unit. Preferably, the sludge is premixed with a hydrocarbon, such as a light oil, prior to mixing with the feed.

Claims

1. A process for the disposal of a hydrocarbon-containing petroleum refinery liquid sludge waste stream in the form of an oil-in-water emulsion, which comprises mixing the sludge with a hydrocarbon oil to cause the oil-in-water emulsion to invert to a water-in-oil emulsion and mixing the water-in-oil emulsion with a feedstock for a fluid catalytic cracking reactor, and feeding the water-in-oil emulsion and the feedstock to the fluid catalytic cracking reactor in which the oil and the feedstock are subjected to catalytic cracking.

2. A process according to claim 1, wherein the liquid waste sludge is partially dewatered prior to mixing with the feedstock.

3. A process according to claim 1, wherein the mixing of the sludge with the hydrocarbon oil is effected in the presence of an emulsifying agent.