The present invention provides an assembly for use in vertical, gravity flow driven polymerization reactors for combinations of high viscosity, high throughput, and shallow polymer depths. The baffle assembly module of the invention includes a support structure having a plurality of side openings. The side openings allow the escape of vapor liberated from the polymeric melt. The assembly further includes a feed splitter followed by two or more vertically arranged rows of baffle plates with the f...

The invention relates to an apparatus for the conduct of chemical reactions, comprising: a reaction slider in which are formed a multiplicity of through holes serving as reaction chambers, a selector slider located on the upper surface of the reaction slider and having at least one continuous control orifice, wherein the selector slider is movable relative to the reaction slider in such a way that its control orifice may be brought into alignment with one of the reaction chambers of the reaction...

The present invention is directed to a method for polymerizing olefins in a multi-stage polymerization apparatus including a gas-phase polymerization reactor in a subsequent stage. By use of the present method, the composition of gas in the gas-phase reactor is easily adjusted, and moreover, a polymer having an intended composition is produced in a consistent manner. In one aspect, the method for polymerizing olefins is performed in successive, multiple stages by use of a plurality of polymeriza...

An applicator tip for dispensing a polymerizable and/or cross-linkable material which is porous, absorbent or adsorbent and includes a polymerization or cross-linking initiator. The initiator initiates polymerization or cross-linking when the polymerizable and/or cross-linkable material is dispensed through the applicator tip. The polymerizable and/or cross-linkable material may be applied to a variety of substrates.

Apparatus and methods are disclosed for controlling atmospheric characteristics inside a chamber. An apparatus comprises a mechanism for diffusively introducing pressurized gas into the apparatus, an outlet element in fluid communication with the mechanism, and a chamber in fluid communication with the outlet element. The outlet element and the chamber are disposed such that gas flow therethrough is substantially uniform. The chamber comprises a gas outlet and the outlet element comprises a plur...

The present invention relates to an improved catalyst delivery method for introducing a supported bulky ligand metallocene-type catalyst system to a reactor for polymerizing one or more olefin(s). In particular, the invention provides for a method of introducing a supported metallocene-type catalyst system into a polymerization reactor by and in the presence of a carrier solution of an antistatic agent and a liquid diluent. Also, the invention is directed toward a catalyst feeder for use in a po...

A chemical synthesis apparatus (20) for building chemical compounds includes a head assembly (21) having an array of nozzles (22) with each nozzle or plurality of nozzles coupled to a reservoir (23) of liquid reagent (24), and a base assembly (25) having an array of reaction wells (26). A transport mechanism (27) aligns the reaction wells (26) and selected nozzles (22) in a longitudinal X-direction for deposition of liquid reagent (24) into selected reaction wells (26). A plurality of independen...

An applicator tip for dispensing a polymerizable and/or cross-linkable material which is porous, absorbent or adsorbent and includes a polymerization or cross-linking initiator. The initiator initiates polymerization or cross-linking when the polymerizable and/or cross-linkable material is dispensed through the applicator tip. The polymerizable and/or cross-linkable material may be applied to a variety of substrates.

The present invention relates to a method and apparatus for controlling static charges in a fluidized bed olefin polymerization reactor. Static charges which develop in the polymer products are measured and, if they fall outside a predetermined range, static charge control agents are introduced into the reactor. By controlling the static charges in the reactor, sheeting and drooling can be controlled.

The present invention relates to an apparatus for preparing polynucleotides on a solid support in a reactor comprising a column containing an immobilized solid support that is functionalized for polynucleotide synthesis. The solid support can be porous, and can be functionalized with a nucleoside or with a universal synthesis of polynucleotides.