Abstract: This invention relates to a novel carbon dioxide product comprising a pumpable slurry consisting of finely divided particles of solid phase carbon dioxide dispersed in liquid phase carbon dioxide in which the solid particles are free flowing, i.e. do not agglomerate on standing for periods of time sufficient to permit beneficial commercial use of the product. The slurry is produced by withdrawing gaseous carbon dioxide at a controlled rate from a vessel containing liquid carbon dioxide at the temperature and pressure conditions of the triple point while vigorously agitating the liquid, to produce solid carbon dioxide particles in the liquid. The rate of formation of the solid is controlled to produce small, finely divided particles of solid carbon dioxide rather than large pieces.

Abstract: Liquefaction of a vapor such as carbon dioxide gas is achieved by utilizing the refrigeration available in liquefied natural gas (LNG) to sub-cool liquid carbon dioxide, which in turn is sprayed into carbon dioxide gas in a condensing vessel thereby liquefying the gas. Suitable control means are provided for maintaining a predetermined temperature within the condensing vessel and for regulating the flow rate of LNG in response to variations in the flow of liquid carbon dioxide before the sub-cooling of liquid CO.sub.2 by LNG is effected.

Abstract: Methods and apparatus for producing and distributing a slurry of finely divided unagglomerated carbon dioxide particles suspended in liquid carbon dioxide include the production of liquid CO.sub.2 from carbon dioxide gas. A CO.sub.2 slurry is then formed in a reactor by introducing liquid CO.sub.2 therein, agitating the same and concurrently controlling the rate of evaporation. The slurry so formed is pumped to a storage vessel wherein the solids concentration of the slurry may be increased. Slurry is subsequently pumped into a trailer for transport to a customer location with excess CO.sub.2 liquid within the trailer being decanted and returned to the storage vessel thereby increasing the solids content of transported slurry to 60-80 percent. During transport, the slurry is permitted to settle within the trailer and upon reaching a customer location, the settled slurry is reslurried prior to discharge from the trailer.