Johnson Matthey Davy Technologies Limited

Davy Process Technology Limited

Johnson Matthey Davy Technologies Linited

Julian Stuart Gray

Michael William Winter

Andrea Gnagnetti

Duncan David Holdsworth

Simon Roberts

A catalyst carrier for insertion in a reactor tube of a tubular reactor, said catalyst carrier comprising: a container for holding catalyst in use, said container having a bottom surface closing the container, and a top surface; a carrier outer wall extending from the bottom surface to the top surface; a seal extending from the container by a distance which extends beyond the carrier outer wall; said carrier outer wall having apertures located below the seal.

Annular catalyst carrier container for use in a tubular reactor

A reactor having a shell comprising one or more reactor tubes located within the shell, said reactor tube or tubes comprising a plurality of catalyst receptacles containing catalyst; means for providing a heat transfer fluid to the reactor shell such that the heat transfer fluid contacts the tube or tubes; an inlet for providing reactants to the reactor tubes; and an outlet for recovering products from the reactor tubes; wherein the plurality of catalyst receptacles containing catalyst within a tube comprises catalyst receptacles containing catalyst of at least two configurations.

Process and reactor comprising a plurality of catalyst receptacles

A reactor having a shell comprising: one or more reactor tubes located within the shell, said reactor tube or tubes comprising a plurality of catalyst receptacles containing catalyst; means for providing a heat transfer fluid to the reactor shell such that the heat transfer fluid contacts the tube or tubes; an inlet for providing reactants to the reactor tubes; and an outlet for recovering products from the reactor tubes; wherein the plurality of catalyst receptacles containing catalyst within a tube comprises catalyst receptacles containing catalyst of at least two configurations.

Process for carrying out an equilibrium limited reaction

In a catalyst carrier for insertion in a reactor tube of a tubular reactor, the catalyst carrier includes a container for holding catalyst in use. The container has a bottom surface closing the container, and a top surface. A carrier outer wall extends from the bottom surface to the top surface. A seal extends from the container by a distance which extends beyond the carrier outer wall. The carrier outer wall has apertures located below the seal.

In a process for carrying out a chemical reaction gaseous reactants are supplied to a first reaction zone including a first catalyst having a first particle equivalent diameter. The first reaction zone is operated such that when the reactants are contacted with the first catalyst a portion of the reactants is converted to the desired product. An intermediate stream of unreacted reactants and the desired product is removed and passed to a second reaction zone including a tubular reactor. Tubes of the reactor are catalyst carriers containing a second catalyst having a second particle equivalent diameter smaller than the first particle equivalent diameter. The second reaction zone is operated such that when the unreacted reactants are contacted with the second catalyst, at least some of the unreacted reactants are converted to the desired product. A product stream is then recovered. Apparatus for carrying out the process is also described.

Process comprising two reaction zones and apparatus therefore

In a process for recovering water, metals, soluble organics and insoluble organics from a process for the production of a polycarboxylic acid, the stream is cooled to a temperature at which dissolved organics precipitate. The precipitate organics are separated from a liquid stream and recycled to the production process. The liquid stream is then treated with an alkali to convert remaining organics to the alkali salt form and the metals present to be converted to an insoluble form. The insoluble metals are recovered from a liquid stream and this liquid stream, with the alkali salts of the organics, is passed to a membrane separation unit where it is separated into a permeate comprising water and a retentate comprising water and alkali organic salts. The permeate is recovered and recycled to the production process. The retentate also is recovered.

Process for recovering water, metal and organics from the production of polycarboxylic acid

In a reaction vessel for the purification of crude aromatic carboxylic acid, a bed of hydrogenation catalyst having a vapor space is located above the hydrogenation catalyst bed. A packed bed and a holdup section are located within the vapor space and spaced above the catalyst bed. The reaction vessel has means for introducing crude aromatic carboxylic acid and means for introducing hydrogen to the reaction vessel at respective locations such that in use the crude carboxylic acid contacts the hydrogen in the packed bed. The reaction vessel also has means for removing purified aromatic carboxylic acid.

Apparatus and process for purification of aromatic carboxylic acid

In a process for the separation of solid carboxylic acid fines from mother liquor that includes such fines, the mother liquor is fed to a settlement drum at above atmospheric pressure. The mother liquor having a lower concentration of carboxylic fines than that fed to the settlement drum is then removed, wherein the mother liquor removal occurs at a point above the point at which the mother liquor containing fines is fed to the settlement drum. In a system for performing the separation process, a settlement drum has an inlet for mother liquor with carboxylic acid fines and an outlet for mother liquor having a lower concentration of carboxylic acid fines content than that of the mother liquor introduced via the inlet. The settlement drum is configured to operate at above atmospheric pressure and the outlet is located at a point in the settlement drum above the inlet.

Process and system for the separation of solid carboxylic acid fines

In a process for the separation and drying of crude carboxylic acid crystals from a slurry in a solvent, the slurry is supplied to a filter operating at pressure and at a temperature above the atmospheric boiling point of the solvent. A cake of separated crystals is removed from the filter and passed to a thermal dryer. In a system for the separation and drying of crude carboxylic acid from a slurry in a solvent, a pressure filter device has a slurry inlet and an outlet for a cake of carboxylic acid crystals. The system also has a thermal dryer and means for transporting the cake of carboxylic acid crystals from the pressure filter device to the dryer. The pressure filter device is configured to operate at a pressure and temperature above the atmospheric boiling point of the solvent.

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London, United Kingdom

Julian Stuart Gray