cryo grinding equipment drag reducing agent

May 17, 2005· The usual grinding procedure requires cryogenic conditions to reduce the dry solid polymeric drag reducing agent to a fine particle size. Cryogenic conditions are defined herein as operating the grinding process at or below the glass transition temperature of the polymer.

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A method for producing a particulate polymer drag reducing agent, comprising granulating a bulk polymer DRA having an average size of greater than about 100 mm in the presence of a liquid wetting agent to form a granulated polymer DRA having an average size of from about 1 to about 100 mm. The granulated polymer DRA may then be ground to form a particulate polymer DRA having an average ...

Examples of a solid organic grinding aid include ethene/butene copolymer particles, paraffin waxes and solid alcohols. An example of a suitable liquid grinding aid includes a …

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Jun 17, 2004· Non-cryogenic process for grinding polyolefin drag reducing agents United States Patent Application 20040112995 Kind Code:

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Examples of a solid organic grinding aid include ethene/butene copolymer particles, paraffin waxes and solid alcohols. An example of a suitable liquid grinding aid includes a …

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May 14, 2007· TECHNICAL FIELD. The invention relates to processes for producing polymeric drag reducing agents in a finely divided particulate form, and most particularly to processes for grinding polymeric drag reducing agents to produce fine particulates thereof in two or more passes that do not require grinding at cryogenic temperatures.

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High concentration drag reducing agents may be prepared by microencapsulating polymer drag reducing agent. The microencapsulation may be performed prior to, during, or after the polymerization of monomer into effective drag reducing polymer. If encapsulation is done before or during polymerization, a catalyst may be present, but little or no solvent is required.

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No injection probes or other special equipment should be required to introduce the drag-reducing slurry into the liquid stream, nor is grinding (cryogenic or otherwise) of the polymer necessary to form a suitable drag-reducing agent [75].

A process for producing fine particulate polymer drag reducing agent (DRA) without cryogenic temperatures, is described. The grinding or pulverizing of polymer, ... » cryo grinding equipment – drag reducing; Small scale gold mining equipment for sale | Mills For Sale. ...

Dec 04, 2014· No injection probes or other special equipment is expected to be required to introduce the drag reducing slurry into the liquid stream, nor is grinding (cryogenic or otherwise) of the polymer necessary to form a suitable drag reducing agent.

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May 14, 2007· The invention relates to processes for producing polymeric drag reducing agents in a finely divided particulate form, and most particularly to processes for grinding polymeric drag reducing agents to produce fine particulates thereof in two or more passes that do not require grinding at cryogenic temperatures. BACKGROUND

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cryo grinding equipment drag reducing agent. cryo grinding equipment drag reducing Continuous neat polymerization and ambi to produce a particulate polymer drag reducing agent In one preferred require special equipment for preparation storage and inj ec tion into a drag reducing agents that did not require cryogenic grinding

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United States Patent 19 The equipment used for injection of the polymer drag reducing composition of viscoelastic polymers that are water soluble and have high molecular weight reducing agent to cryogenic grinding in the presence of an inert solid material The resulting product is a finely-cryo grinding equipment drag reducing-,small size solid rubber block grinding machinescryo grinding ...

A method for producing a particulate polymer drag reducing agent, comprising granulating a bulk polymer DRA having an average size of greater than about 100 mm in the presence of a liquid wetting agent to form a granulated polymer DRA having an average size of from about 1 to about 100 mm. The granulated polymer DRA may then be ground to form a particulate polymer DRA having an average ...

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Cryogenic grinding of plant and animal tissue is a technique used by microbiologists. Samples that require extraction of nucleic acids must be kept at −80 °C or lower during the entire extraction process. For samples that are soft or flexible at room temperature, cryogenic grinding may be the only viable technique for processing samples.