This disclosure relates to a processing that includes a first shell and a second shell disposed within the first shell. The second shell includes a first end, a second end, and a wall extending between the first end and the second end. The second shell also defines a cavity and a longitudinal axis extending between the first end and the second end. A cross section of the second shell transverse to the longitudinal axis includes a first arcuate inner wall portion having a first radius of curvature and a second arcuate inner wall portion having a second radius of curvature. The first radius of curvature is larger than the second radius of curvature.

The invention relates to synthesis of methyl carbamate (MC) and dimethyl carbonate (DMC) in presence of stripping inert gas or superheated methanol vapors using packed column reactor and bubble column reactor.

The present invention relates to a continuous vapor phase olefin polymerization process comprising polymerization of at least one olefin monomer in at least two serial polymerization reactors containing an agitated bed of forming polymer particles, wherein forming polymer particles are transferred from an upstream reactor to a downstream reactor, wherein the upstream reactor is a horizontal stirred reactor containing multiple reaction zones, each reaction zone having at least one inlet for a gaseous stream and optionally additionally an inlet for a liquid stream, wherein said process reduces the carry-over of undesired reactive gases from the upstream reactor to the downstream reactor. The present invention further relates to a system suitable for the present continuous vapor phase olefin polymerization process. The present invention further relates to the use of the present process and system for producing heterophasic polypropylene.

Systems and methods for molten media pyrolysis for the conversion of methane into hydrogen and carbon-containing particles are disclosed. The systems and methods include the introduction of seed particles into the molten media to facilitate the growth of larger, more manageable carbon-containing particles. Additionally or alternatively, the systems and methods can include increasing the residence time of carbon-containing particles within the molten media to facilitate the growth of larger carbon-containing particles.

Systems and methods for molten media pyrolysis for the conversion of methane into hydrogen and carbon-containing particles are disclosed. The systems and methods include the introduction of seed particles into the molten media to facilitate the growth of larger, more manageable carbon-containing particles. Additionally or alternatively, the systems and methods can include increasing the residence time of carbon-containing particles within the molten media to facilitate the growth of larger carbon-containing particles.

A chemical reaction method includes preparing a chemical reaction apparatus including a horizontal flow reactor partitioned into multiple chambers by multiple partition plates. A liquid content horizontally flows with an unfilled space provided thereabove. a microwave generator and a waveguide that transmits microwaves to the unfilled space are also included. The reactor is inclined such that, in each of the chambers, a weir height on an inlet side is higher than a weir height on an outlet side by at least an overflow depth at the partition plate on the outlet side. The content is flowed over each of the multiple partition plates inside the reactor. The content flowing inside the reactor is irradiated with microwaves. The inclination angle of the reactor is changed in each of the chambers so that a weir height on an inlet side is higher than a weir height on an outlet side.

A disk reactor for production of polycarbonate includes a cylinder provided with an end cover at each end. The cylinder is provided with a material inlet, a product outlet and a gas phase port thereon. The cylinder is provided with a driving shaft therein. The driving shaft is provided with plural disks at different spaces thereon. Each disk has slope different from each other. Each disk is provided with plural transverse blades and plural transverse scrapers thereon. A scraper blade is arranged between two disks and fixed on the driving shaft. Compared with the prior disk reactors, the disk reactor fully considers the change of melt viscosity in the polymerization process, simultaneously increases the mass transfer area of the reactor, has good film forming and surface renew performance and high light component removal efficiency, and can produce polycarbonate with high molecular weight and uniform quality.

A disk reactor for production of polycarbonate includes a cylinder provided with an end cover at each end. The cylinder is provided with a material inlet, a product outlet and a gas phase port thereon. The cylinder is provided with a driving shaft therein. The driving shaft is provided with plural disks at different spaces thereon. Each disk has slope different from each other. Each disk is provided with plural transverse blades and plural transverse scrapers thereon. A scraper blade is arranged between two disks and fixed on the driving shaft. Compared with the prior disk reactors, the disk reactor fully considers the change of melt viscosity in the polymerization process, simultaneously increases the mass transfer area of the reactor, has good film forming and surface renew performance and high light component removal efficiency, and can produce polycarbonate with high molecular weight and uniform quality.

Horizontal adiabatic reactor (1) for heterogeneous catalytic reactions, comprising an outer cylindrical shell (2), an inlet (6) for reagent gases and an outlet (7) for gaseous products, a basket (10, 13) containing a catalytic bed (5a, 5b) positioned horizontally inside said reactor, wherein said reactor is configured in such a way that the gases cross said catalytic bed in a radial or axial-radial manner, said shell (2) has a cover (4) which can be opened and which defines an opening (20), and said basket (10, 13) is extractable horizontally from said opening.

A combined reactor and condenser for the synthesis of urea from ammonia and carbon dioxide, including a condenser section coupled to a reaction section, comprising inputs directed to said condenser section for a gaseous stream comprising ammonia and carbon dioxide and for a solution containing ammonium carbamate and liquid ammonia, and wherein the effluent of the condenser section is sent to the reaction section; the reaction section comprises a plurality of compartments and a plurality of mixers, at least one inside each of said compartments.