摘要:
A CFB reactor or combustor having an internal impact type primary particle separator provides cavity means and particle return means in an upper portion of the reactor enclosure to obtain direct and internal return of all primary collected solids to a bottom portion of the reactor or combustor for subsequent recirculation without external and internal recycle conduits.
摘要:
An internal particle separator having impingement members positioned within the furnace enclosure across and just upstream of the furnace exit opening. These impingement members are organized into at least two staggered rows that are positioned to fully cover the exit opening thereby allowing entrained particles to strike the impingement members and free-fall directly back into the fluidized bed to increase its density. A baffle plate is attached to the lower end region of the impingement members thereby obstructing the vertical gas passage between these members.
摘要:
An improved method for producing purified terephthalic acid by catalytic hydrogenation is disclosed. Control of the reduction of colored compounds during the production of purified terephthalic acid is effected by modulating solution hydrogen concentration during hydrogenation.
摘要:
A catalyst and process for purifying crude terephthalic acid wherein the catalyst is prepared by contacting a carbonaceous support with an aqueous solution of sodium tetranitropalladate.
摘要:
A process is disclosed for producing a structural foam article having a surface that reproducibly and faithfully replicates the surface of the mold within which the article was made. The process is an improvement in the "low pressure" process for producing structural foam, wherein the improvement resides in introducing the molten mixture of foamable thermoplastic material and blowing agent into the mold under such conditions that a no-slip boundary condition is maintained at an interface between the flowing thermoplastic and a predetermined portion of the interior surface of the mold, and by maintaining the temperature at said interface at or above a certain temperature (termed "replication temperature"), while the thermoplastic is flowing in the mold.