The invention relates to a process for the polymerisation of vinyl -containing monomers such as, for example, monomeric vinyl halides, in a reaction mixture, in which process less waste is generated.

Process for the polymerisation of vinyl-containing monomers

A free-radical retrograde polymerization process for forming a polymer. An admixture of reactants including predetermined amounts of a monomer, a solvent, and a free-radical-initiator is reacted. A precipitation polymerization reaction occurs such that a polymer-rich phase is at a temperature generally above the lower critical solution temperature (LCST) of the admixture.

/pdf/free-radical-retrograde-precipitation-polymerization-process-1k0hoczakt.pdf

Free-radical retrograde precipitation-polymerization process

The invention relates to a system suitable for the continuous polymerization of one or more α-olefin monomers of which at least one is ethylene or propylene comprising a reactor (8), a compressor (400), a cooling unit (5) and an external pipe (11) for the production of a prepolymer and/or polymer, wherein the reactor comprises a first outlet for a top recycle stream (40), wherein the system comprises apparatus for condensing the top recycle stream into a bottom recycle stream, wherein the reactor comprises a first inlet for receiving a bottom recycle stream (10), wherein the first inlet for receiving the bottom recycle stream is located underneath the distribution plate (6), wherein the reactor comprises an integral separator (1) for separation of the bottom recycle stream into a gas/liquid and a liquid phase, wherein the integral separator is located underneath the distribution plate (6), wherein the first inlet of the integral separator is connected to a first outlet for a liquid phase, wherein the first outlet for the liquid phase is connected to the second outlet of the reactor for the liquid phase, wherein the second outlet of the reactor provides the liquid phase to the first inlet of the external pipe (11), wherein the external pipe comprises a second inlet for receiving a solid polymerization catalyst (20), wherein the first outlet of the external pipe is connected to a second inlet of the reactor for receiving a slurry phase comprising the prepolymer and/or polymer, wherein the reactor comprises a third outlet for providing polyolefin (30), wherein the system comprises a first inlet for receiving a feed (60) and optionally a second inlet for receiving a feed (70).

Process for continuous polymerization of olefin monomers in a reactor

Methods and systems for preparing alkylene glycols are described herein. The methods and systems incorporate the novel use of a high shear device to promote dispersion and solubility of alkylene oxides with water. The high shear device may allow for lower reaction temperatures and pressures and may also reduce reaction time.

Method of making alkylene glycols

A method is disclosed for producing polyvinyl chloride which includes mixing a vinyl chloride solution with an initiator solution in at least one high shear mixing device comprising at least one rotor/stator set producing a rotor tip speed of at least 5.1 m/sec (1000 ft/min), to form a polymerization mixture; and allowing the mixture to polymerize by free radical polymerization to form polyvinyl chloride. The polymerization mixture may be subjected to free radical polymerization conditions comprising a temperature in the range of about 20°C to about 230°C. In some embodiments, the high shear mixing device produces a shear rate of at least 20,000 s-1. A system for carrying out the method is also disclosed.

System and process for production of polyvinyl chloride

Continuous polymerization process

Vaporization of polychlorocyclohexanes

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Continuous polymerization process

Vaporization of polychlorocyclohexanes