Disclosed are a method and system for propylene polymerization utilizing a loop slurry reactor. The method can include polymerizing propylene in a loop slurry reactor under bulk polymerization conditions to produce polypropylene. The propylene polymerization system can include i) a loop slurry reactor and a heat exchange system that is configured to cool the legs of the loop slurry reactor and/or ii) an inlet manifold that is configured to connect flashline heaters to a separator.

The invention relates to a method for producing hydrogen gas and optionally a carbonaceous product from a hydrocarbon fuel, comprising: introducing a flowing stream of said fuel into a reaction chamber of a reactor, wherein said reaction chamber has at least one wall and a heating zone which is heated by a heat source, heating said fuel in said heating zone to effect pyrolytic decomposition of said hydrocarbon fuel to produce said hydrogen gas and optionally said carbonaceous product; wherein the ratio of C:O (mol/mol) in the reaction chamber is greater than 20:1; and characterized in that the heat source heats the hydrocarbon fuel in the heating zone by radiated heat to an average temperature of greater than 2000° C. The invention also relates to an apparatus for carrying out the method of the invention.

A method of assembling an apparatus for containing reagents for a chemical reaction. The apparatus includes an elongate housing and a receptacle. The elongate housing may include a cooling means, and end fittings which may include ports where fluids may be introduced and/or removed. Specifically, the method relates to the securement of a receptacle relative to the outwardly facing surface of the housing.

A reactor system for producing modacrylic polymer having a main tank with at least one feed inlet, a mixing element inside the main tank, a secondary tank connected to the main tank with an overflow channel, a reaction terminator feed and a level meter for the secondary tank, an outlet at the bottom of the secondary tank, a level control valve that controls the outlet, a collection area connected to the outlet, and a control unit configured to control the level control valve to determine output amount to be transferred to the collection area from the secondary tank according to data received from the level meter in order to keep the level in the secondary tank constant. The temperature in the main tank and the secondary tank is continuously measured and the main tank and the secondary tank temperature difference is arranged such that it does not exceed +5° C.

Methods for forming melt processable, actinic radiation polymerizable and crosslinkable adhesives are described. In certain versions, the adhesives or pre-adhesive compositions include two initiators and are polymerized and/or crosslinked by exposure to actinic radiation such as UV light or electron beam radiation. Also described are pre-adhesive compositions including polymerizable monomers, articles including the adhesives, and various methods and systems related to the adhesives and their application. In addition, various apparatuses are described for polymerizing or crosslinking the compositions.

Polymerization processes and reactor systems for producing multimodal ethylene polymers are disclosed in which at least one loop reactor and at least one fluidized bed reactor are utilized. Configurations include a loop reactor in series with a fluidized bed reactor and two loop reactors in series with a fluidized bed reactor.

Polymerization processes and reactor systems for producing multimodal ethylene polymers are disclosed in which at least one loop reactor and at least one fluidized bed reactor are utilized. Configurations include a loop reactor in series with a fluidized bed reactor and two loop reactors in series with a fluidized bed reactor.

A jacketed vessel for temperature control of contents within the vessel is provided. The vessel has a shell and an external jacket through which heating or cooling fluid is circulated. The jacket is formed by a length of conduit arranged in a spiral orientation around the vessel shell. The conduit has a center portion having a concave inner surface and has opposing side portions having convex inner surfaces. Edge sections of each side portion are welded to the exterior surface of the shell to form the jacket. Edge sections of adjacent arcs of conduit may be simultaneously welded to the shell in a single weld pass. The shape of the conduit provides improved heat transfer and pressure drop characteristics, as well as improvements in the vessel manufacturing process.

Disclosed are a method and system for propylene polymerization utilizing a loop slurry reactor. The method can include polymerizing propylene in a loop slurry reactor under bulk polymerization conditions to produce polypropylene. The propylene polymerization system can include i) a loop slurry reactor and a heat exchange system that is configured to cool the legs of the loop slurry reactor and/or ii) an inlet manifold that is configured to connect flashline heaters to a separator.

A catalytic membrane composite that includes porous supported catalyst particles durably enmeshed in a porous fibrillated polymer membrane is provided. The porous fibrillated polymer membrane may be manipulated to take the form of a tube, disc, or diced tape and used in multiphase reaction systems. The supported catalyst particles are composed of at least one finely divided metal catalyst dispersed on a porous support substrate. High catalytic activity is gained by the effective fine dispersion of the finely divided metal catalyst such that the metal catalyst covers the support substrate and/or is interspersed in the pores of the support substrate. In some embodiments, the catalytic membrane composite may be introduced to a stirred tank autoclave reactor system, a continuous flow reactor system, or a Parr Shaker reaction system and used to effect the catalytic reaction.