Injection mixer for use in catalytic hydrocarbon conversion processes

• US 2,695,265 A
• Filed: 04/27/1949
• Issued: 11/23/1954
• Est. Priority Date: 04/27/1949
• Status: Expired due to Term

• Current Assignee: William J. Degnen
• Original Assignee: William J. Degnen
• Inventors: Degnen, William J.
• Application Number:
  US03/089,877
• Time in Patent Office: 2,036 Days
• US Class Current: 208/47
• CPC Class Codes: B01F 23/32 by introducing solids in gas volumes
• CPC Class Codes: B01F 23/56 by introducing solids in liquids, e.g. dispersing or dissolving
• CPC Class Codes: B01F 25/312 with Venturi elements; Details thereof
• CPC Class Codes: B01F 25/31241 the main flow being injected in the circumferential area of the venturi, creating an aspiration in the central part of the conduit
• CPC Class Codes: B01F 25/312533 Constructional characteristics of the diverging discharge conduit or barrel, e.g. with zones of changing conicity
• CPC Class Codes: B01J 8/0015 Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
• CPC Class Codes: B65G 2812/1633 using Venturi effect
• CPC Class Codes: B65G 53/00 Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
• CPC Class Codes: Y10T 137/87595 Combining of three or more diverse fluids
• CPC Class Codes: Y10T 137/87611 Flow control by varying position of a fluid inlet relative to entrainment chamber

Claims

7. A HYDROCARBON CONVERSION PROCESS WHEREIN A HYDROCARBON REACTANT IS CONTACTED WITH A FLUID MASS OF FINELY DIVIDED CATALYTIC PARTICLES IN A REACTION ZONE THUS PRODUCING CONVERTED HYDOCARBON PRODUCTS AND CONTAMINATING SAID CATALYST WITH A CARBONACEOUS DEPOSIT, AND WHEREIN AT LEAST A PORTION OF THE CATALYST IN THE REACTION ZONE IS WITHDRAWN FOR REGENERATION BY TREATMENT WITH AN OXYGEN-CONTAINING GAS IN A REGENERATION ZONE;

THE IMPROVEMENT WHICH COMPRISES PASSING A FLUID CARRIER STREAM THROUGH A ZONE HAVING A THROAT SECTION OF MINIMUM CROSS-SECTIONAL AREA AT A VELOCITY IN EXCESS OF THAT REQUIRED TO DISPERSE AND TRANSPORT THE FINELY DIVIDED CATALYST, INTRODUCING CATALYST FROM ONE OF THE AFORESAID PROCESSING ZONES INTO THE INTERIOR OF THE FLUID CARRIER STREAM, AND PASSING THE MIXTURE OF CATALYST AND FLUID THROUGH A DIVERGING ZONE OF GRADUALLY EXPANDING CROSS-SECTIONAL AREA TO REDUCE THE VELOCITY AND SUBSTANTIALLY AVOID EDDYING OF THE SAID MIXTURE WHILE FLOWING THROUGH THE DIVERGING ZONE FOR PASSAGE TO THE OTHER OF THE AFORESAID PROCESSING ZONES, THE CATALYST BEING INTRODUCED THROUGH AN INJECTION ZONE FACING DOWNSTREAM AND THE DISCHARGE END THEREOF IS LOCATED WITHIN TWOTHIRDS OF THE THROAT DIAMETER FROM THE JUNCTURE OF THE THROAT SECTION AND THE DOWNSTREAM DIVERGING ZONE AND NOT MORE THAN ONE-QUARTER OF THE THROAT DIAMETER UPSTREAM OF THE THROAT SECTION.