United States Patent
US Patent 4138222: Pelletization of coal conversion products
US 4138222 ยท granted 1979-02-06
Abstract
Pelletization of a pumpable non-distillable conversion product of coal is effected by agglomerating, in a pelletization zone, a mixture of such product with finely divided coaly solids and recycled undersized pellets from solvent extract and pellet classification zones.
| Patent Number | 4138222 |
|---|---|
| Title | Pelletization of coal conversion products |
| Filed | 1977-12-15 |
| Granted | 1979-02-06 |
| Inventor(s) | Gorin; Everett |
| Assignee | Continental Oil Company |
| Number of Claims | 11 |
Abstract
Pelletization of a pumpable non-distillable conversion product of coal is effected by agglomerating, in a pelletization zone, a mixture of such product with finely divided coaly solids and recycled undersized pellets from solvent extract and pellet classification zones.
Claim 1
The process of pelletizing a pumpable non-distillable product derived from a coal conversion process which comprises: a. circulating a stream of particulate coal derived solids to a pelletization zone in intimate contact with a slurry of said pumpable product in which there has been suspended finely divided coaly solids, under conditions such that saidparticulate coal-derived solids form agglomerates or pellets of larger size; b. subjecting said pellets to solvent treatment to remove liquid coating from the surface of the pellets; c. separating those pellets from step (b) which are smaller than desired, and recycling them to said pelletization zone for reprocessing; and d. recovering the pellets of desired size from step (b).
Claims
11 totalThe process of pelletizing a pumpable non-distillable product derived from a coal conversion process which comprises: a. circulating a stream of particulate coal derived solids to a pelletization zone in intimate contact with a slurry of said pumpable product in which there has been suspended finely divided coaly solids, under conditions such that saidparticulate coal-derived solids form agglomerates or pellets of larger size; b. subjecting said pellets to solvent treatment to remove liquid coating from the surface of the pellets; c. separating those pellets from step (b) which are smaller than desired, and recycling them to said pelletization zone for reprocessing; and d. recovering the pellets of desired size from step (b).