The present invention relates to an improved process for the preparation of trazodone. In particular, the present invention relates to a continuous process for the preparation of trazodone. More in particular, the present invention relates to a new method for the preparation of trazodone, said method comprising at least one step consisting of a continuous process performed in a flow reactor.

A catalytic cracking system in which liquid hydrocarbon and bio-oil are directed into a reactor riser of a fluid catalytic cracking unit by separate feed spray nozzle assemblies. To protect liquid bio-oil directed through the liquid bio-oil feed nozzle assembly from high temperature degradation, an insulating layer is provided between a central bio-oil feed tube in a concentrically surrounding atomizing gas passageway. Cooling channels also may be provided in the spray tip of the bio-oil feed nozzle assembly.

A hydroprocessing system having a processing vessel that discharges a high temperature effluent that must be cooled prior to collection in a reflux drum. One or more gas assisted spray nozzle are provided that utilize light atomizing gas having a density of 8-15 times less than air, such as hydrogen, which preferably is the processing or recycle gas of the system. The spray nozzles are designed for the efficient atomization and direction of cooling water into a micron sized droplet distribution utilizing the light atomizing gas for affecting higher mass and heat transfer from the effluent. The spray nozzles each include a unique atomizing gas and cooling liquid passageway systems, a downstream impingement post, and a plurality of discharge orifices which sequentially breakdown the liquid into micron sized droplets as low as 500 microns and less.

An apparatus for extraction and recovery of components from biomass feedstocks with pressurized low polarity water. The apparatus is configured with four or more reaction columns, wherein each column is in separate communication with a supply of hot water, a first supply of pressurized heated water, a second supply of pressurized heated water, and a supply of pressurized cooling water. Components may be extracted concurrently from two or more batches of the biomass by, first placing the two batches of biomass into two selected columns, separately flooding the two columns with pressurized water, heating the columns and their contents to the point where the water becomes pressurized low polarity (PLP) water, recovering the PLP water comprising the extracted components from the two selected columns, cooling the columns with PLP water, and removing the spent biomass material from the columns.

An apparatus is provided for processing reusable fuel comprising: a continuous material supply assembly; a heated airlock feeder configured to continuously receive and process the material supply received therein; a reactor configured to receive the processed material from the heated airlock feeder; and a vapor refining system configured to process vapor supplied by the reactor. The apparatus may comprise a char disposal system configured to eliminate char from the reactor. The apparatus may also comprise a thermal expansion system configured to allow thermal expansion of the reactor. A cooling system may be configured to receive processed fuel from the reactor.

To prevent solidified aluminum chloride from adhering to and accumulating on a pipe and also prevent stress-corrosion cracking in the pipe, a method for producing trichlorosilane includes a cooling step of cooling a discharge gas that is discharged from a fluidized-bed reactor and that contains the trichlorosilane, the cooling step involving causing a fluid to flow through a space (4) inside a side wall (3) of a pipe (10), the pipe being a pipe for discharging the discharge gas from the fluidized-bed reactor, in such a manner that the side wall (3) has a surface (1a) having a temperature of not lower than 110 C.

A method of operating a dump tank of a polymer production process by transferring all or a portion of a content of a polymerization reactor into the dump tank, wherein the reactor contents comprise solid polymer, and liquid and gaseous non-product components, and removing at least a portion of the liquid and gaseous non-product components from the dump tank by: reducing a pressure of the dump tank, subjecting the solid polymer to a first cleaning stage comprising heating the solid polymer by introducing a first heated treatment gas into the dump tank, and subjecting the solid polymer to a second cleaning stage comprising purging the solid polymer by introducing a second heated treatment gas into the dump tank.

A reactor for treating an organic material in a reaction medium by hydrothermal oxidation, comprising: a longitudinal body provided with a cold interface flange; an inner tube, positioned in the body to form an annular area and comprising a cold end and a hot end, the inner tube delimiting an internal reaction area in fluid communication with the annular area via an opening provided in the hot end of the inner tube; blades for stirring the reaction medium situated in the internal reaction area and mounted rotating about the longitudinal axis of the body; a sleeve for injecting organic material to be treated into the inner tube. The inner tube is mounted rotating on the cold flange, so as to be rotated about the longitudinal axis; the sleeve being positioned inside the inner tube, having a bore that defines a passage for the organic material to be treated to pass.

A reactor for treating an organic material in a reaction medium by hydrothermal oxidation, comprising: a longitudinal body provided with a cold interface flange; an inner tube, positioned in the body to form an annular area and comprising a cold end and a hot end, the inner tube delimiting an internal reaction area in fluid communication with the annular area via an opening provided in the hot end of the inner tube; blades for stirring the reaction medium situated in the internal reaction area and mounted rotating about the longitudinal axis of the body; a sleeve for injecting organic material to be treated into the inner tube. The inner tube is mounted rotating on the cold flange, so as to be rotated about the longitudinal axis; the sleeve being positioned inside the inner tube, having a bore that defines a passage for the organic material to be treated to pass.

The present invention provides a feed gas feeding system for a propylene ammoxidation reactor. The feed gas feeding system comprises a feed gas mixing system and a feed distributor. A propylene and ammonia mixed gas is mixed by the feed gas mixing system and then uniformly distributed in the propylene ammoxidation reactor by means of the feed distributor, an initial temperature T.sub.0 when the propylene and ammonia mixed gas enters the feed distributor being 10-220 C. The propylene and ammonia feed gas feeding system of the present invention for ammoxidation of propylene and the preparation of acrylonitrile prevents the temperature of a gas mixture at any position in the propylene and ammonia feed distributor from reaching a temperature at which ammonia decomposes into active nitrogen atoms, thereby reducing a risk of brittle nitriding fractures of the propylene and ammonia distributor.