A hydrocarbon soluble drag reducing suspension is described as well as a process for obtaining the same. Process is directed toward producing a drag reducing product which is easily transportable, non-hazardous, easily handled and while providing a significant increase in drag reduction capability over existing commercial products. The suspension is preferably substantially solvent-free.

Solvent free oil soluble drag reducing polymer suspension

Flow of a stream comprised of hydrocarbons is improved by introducing into the stream a stable, non-agglomerating suspension comprising: (a) water, (b) highly dispersed in the water, and substantially insoluble therein, and extremely finely-divided, non-crystalline, ultra-high molecular weight, hydrocarbon-soluble, undegraded polyalkene having 2 to about 30 carbon atoms per alkene precursor and an inherent viscosity of at least 20 dL/g, and (c) a small but effective amount of a surfactant having a HLB of at least about 9. The finely divided polyalkene is prepared by polymerization and then cryogrinding below the glass transition temperature of the polyalkene.

Slurry drag reducer

IN THE BASE-CATALYZED SUBSTANTIALLY ANHYDROUS ANIONIC LACTAM POLYMERIZATION, THE IMPROVEMENT WICH COMPRISES DISSOLVING THE METAL LACTAM CATALYST IN AN N,N-DISUBSTITUTED, AMIDE OF THE FORMULA R-CO-N(-R1)-R2 WHERE R IS HYDROGEN OR ANY MONOVALENT HYDROCARBON RADICAL, R1 AND R2 CAN BE ANY MNOVALENT HYDROCARBON RADICAL AND WHERE ANY TWO OF THE R''S CAN BE JOINED TOGETHER TO FORM A HETEROCYCLIC RING, PRIOR TO ADDING SAID METAL LACTAM CATALYST TO THE MONOMERIC LACTAM TO BE POLYMERIZED. ALSO DESCRIBED IS A SOLUTION OF A METAL LACTAM IN THE N,N-DISUBSTITUTED AMIDES DESCRIBED ABOVE AS WELL AS A PROCESS FOR PREPARING THE SOLUTION COMPRISING REACTING THE METAL OR METAL COMPOUND WITH A LACTAM IN THE PRESENCE OF THE N,N-DISUBSTITUTED AMIDE.

Anionic lactam catalyst system

A process for continuously producing a polymer drag reducing agent (DRA) is described. The process concerns mixing a monomer and a catalyst in at least one continuously stirred tank reactor (CSTR) to form a mixture. The mixture is continuously injected into a volume continuously formed by a thermoplastic material, such as polyethylene. The thermoplastic material is periodically sealed off to form a temporary container or bag. The monomer is permitted to polymerize in the temporary container to form polymer. In one non-limiting embodiment, the polymerization in the bag takes place within an inert, circulating fluid that accelerates heat transfer. The polymer and the temporary container are then ground together, preferably at non-cryogenic temperatures, to produce a particulate polymer drag reducing agent. In one preferred, non-limiting embodiment, the grinding or pulverizing occurs in the presence of at least one solid organic grinding aid. Finally, the particulate polymer drag reducing agent may be combined with a dispersing fluid.

Continuous neat polymerization and ambient grinding methods of polyolefin drag reducing agents

The present invention is directed to improved drag reducing agents and methods of forming improved drag reducing agents comprising the steps of isomerizing olefin monomers to form isomerized olefin monomers, polymerizing the isomerized olefin monomers in the presence of at least one catalyst to form a polyolefin drag reducing agent having unexpectedly superior drag reduction properties when combined with liquid hydrocarbons, such as viscous crude oil. Therefore, the drag reducing agents of the present invention may be introduced into conduits, such as pipelines, to increase the flow of the hydrocarbons through the conduit.

Methods for forming amorphous ultra-high molecular weight polyolefins for use as drag reducing agents

Process for continuous polymerization

Production of shaped polyamide structures of improved properties using amides, sulfoxides or sulfones

Verfahren zur Herstellung von Formkoerpern auf der Basis von Polyamiden

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Process for continuous polymerization

Production of shaped polyamide structures of improved properties using amides, sulfoxides or sulfones

Verfahren zur Herstellung von Formkoerpern auf der Basis von Polyamiden