Methods for inhibiting fouling in fluid catalytic cracking units

• US 5,158,667 A
• Filed: 08/23/1991
• Issued: 10/27/1992
• Est. Priority Date: 08/23/1991
• Status: Expired due to Fees

• Current Assignee: Betz Laboratories, Inc. (General Electric Company)
• Original Assignee: Betz Laboratories, Inc. (General Electric Company)
• Inventors: Barlow, Raymon C., Reid, Dwight K.
• Primary Examiner(s): Morris, Theodore
• Assistant Examiner(s): Diemler, William C.
• Application Number:
  US07/749,034
• Time in Patent Office: 431 Days
• Field of Search: 208/48 AA, 208/251 R, 44/335, 585/950
• US Class Current: 208/48.0AA
• CPC Class Codes: C10G 11/00 Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils cracking in direct contact with molten metals or salts C10G9/34
• CPC Class Codes: C10G 75/04 by addition of antifouling agents
• CPC Class Codes: C10G 9/16 Preventing or removing incrustation
• CPC Class Codes: Y10S 585/95 Prevention or removal of corrosion or solid deposits

Abstract

This invention relates to processes for inhibiting fouling in fluid catalytic cracking units. The processes comprise adding to the hydrocarbon being processed a polymer formation inhibiting amount of aminoethyl piperazine.

Claims

1. A method for inhibiting the formation of polymers and the subsequent fouling equipment surfaces in a fluid catalytic cracking unit during the processing of hydrocarbon slurry streams at a temperature of 650°

F. to 1000°

F. comprising adding to said streams from about 5 to about 5000 parts per million parts of said stream of aminoethyl piperazine contained in an organic solvent and polybutynyl thiophosphoric acid ester.

2. The method as claimed in claim 1 wherein said aminoethyl piperazine is added in an amount from about 15 parts to about 200 parts per million parts of said hydrocarbon.

3. The method as claimed in claim 1 wherein said organic solvent is heavy aromatic naphtha.