Premium coking process

• US 4,713,168 A
• Filed: 08/29/1986
• Issued: 12/15/1987
• Est. Priority Date: 08/29/1986
• Status: Expired due to Fees

• Current Assignee: Conoco Incorporated (ConocoPhillips)
• Original Assignee: Conoco Incorporated (ConocoPhillips)
• Inventors: Newman, Bruce A.
• Primary Examiner(s): Metz, Andrew H.
• Assistant Examiner(s): MYERS, HELANE ELEANORA
• Application Number:
  US06/901,851
• Time in Patent Office: 473 Days
• Field of Search: 208/131
• US Class Current: 208/131
• CPC Class Codes: C10B 55/00 Coking mineral oils, bitumen, tar, and the like or mixtures thereof with solid carbonaceous material cracking oils C10G
• CPC Class Codes: C10B 57/06 containing additives
• CPC Class Codes: C10G 9/005 Coking (in order to produce liquid products mainly)

Abstract

In a delayed premium coking process the particle size of the premium coke is increased by the addition of a Lewis acid such as aluminum chloride to the coking process. Preferably the aluminum chloride is added during the latter part of the coking cycle.

Claims

1. In a delayed premium coking process in which an aromatic mineral oil feedstock is heated to an elevated temperature and introduced into a coking drum under delayed coking conditions, the improvement comprising:

(a) determining the time required at said coking conditions to obtain a calcining yield of from 70 to 85 weight percent; and

(b) adding a Lewis acid to said coking drum during only the latter portion of the introduction of feedstock to said coking drum, said latter portion being a period equal to the time determined in step (a), whereby the proportion of +30 mesh coke product resulting is increased without a substantial increase in the CTE of said coke.

2. The process of claim 1 wherein said Lewis acid is aluminum chloride.