This invention relates to a process for the continuous production of polyether polyols, polyether polyols produced by the inventive continuous process and their use in polyurethane applications.

The present disclosure discloses a method and device for removing iron in an iron-containing solution in hydrometallurgy. This method comprises the steps of: adding an iron-containing solution in hydrometallurgy into a reactor through a first homogenizing distributor, controlling concentration of the ferric iron in the reactor below 1 g/L, controlling pH of the solution in the reactor to be 2.54, the temperature to be 65100 C., and the reaction duration to be 13 hours, performing solid-liquid separation for the solution after reaction, and removing the iron in the iron-containing solution in hydrometallurgy in the form of goethite.

A system for producing a functionalized olefinic-based polymer, the system comprising a polymerization zone for producing an olefinic-based polymer comprising a mixing section, a deliquifying section, and a quenching section, wherein at least one section of the polymerization zone has a defined cross-sectional area that continually decreases from a first end to a second end of said section; a devolatilization zone comprising a kneader or extruder, wherein said devolatilization zone is downstream of said polymerization zone and in fluid communication with said polymerization zone; and a functionalization zone downstream of said devolatilization zone and in fluid communication with said devolatilization zone.

A process for making mesophase and/or isotropic pitch. An aromatic rich liquid is charged at high temperature and pressure to a first thermal polymerization reactor to produce an isotropic pitch rich liquid which is flashed. Residual liquid is charged to a second thermal reactor to produce mesophase pitch. The reactors can be either tubular reactors or CSTRs.

A polymer synthesis system has a polymerization reactor and a deliquifying-quench extruder downstream of and in fluid communication with the polymerization reactor. The polymerization reactor has an inlet and an outlet with a rotatable shaft positioned axially within the reactor. The deliquifying-quench extruder has an inlet and an outlet, with a shaft assembly positioned axially within the extruder. The shaft assembly includes multiple helical flight configurations and multiple processing zones defined by the multiple flight configurations. The processing zones include an extraction-compaction zone, a sealing zone downstream of the extraction-compaction zone, a vent-cooling zone downstream of the sealing zone, a quenching zone downstream of the vent-cooling zone, and a conveying zone downstream of the quenching zone.

Provided herein are systems, and methods of using such systems, for producing acrylic acid from ethylene oxide and carbon monoxide on an industrial scale. The production system/production process has various unit operations, including, for example, a -propiolactone production system/production process configured to produce -propiolactone from ethylene oxide and carbon monoxide; a polypropiolactone production system/production process configured to produce polypropiolactone from -propiolactone; and a glacial acrylic acid production system/production process configured to produce acrylic acid with a high purity by thermolysis of polypropiolactone.

The present invention relates to a process for the preparation of an alkanesulfonic acid by oxidation of a sulfur containing starting compound with an oxygen containing fluid, wherein the sulfur containing starting compound is provided in a reaction system, comprising a reaction vessel (1) with an expansion vessel (2) on its top, wherein the reaction vessel and the expansion vessel are connected to allow a flow of a fluid stream from the reaction vessel into the expansion vessel.

This invention relates to a process for the continuous production of polyether polyols, polyether polyols produced by the inventive continuous process and their use in polyurethane applications.

Provided herein are systems, and methods of using such systems, for producing acrylic acid from ethylene oxide and carbon monoxide on an industrial scale. The production system/production process has various unit operations, including, for example, a -propiolactone production system/production process configured to produce -propiolactone from ethylene oxide and carbon monoxide; a polypropiolactone production system/production process configured to produce polypropiolactone from -propiolactone; and a glacial acrylic acid production system/production process configured to produce acrylic acid with a high purity by thermolysis of polypropiolactone.

A system and method for a polyolefin reactor temperature control system having a first reactor temperature control path, a second reactor temperature control path, and a shared temperature control path. The shared temperature control path is configured to combine and process coolant return streams, and to provide coolant supply for the first reactor temperature control path and the second reactor temperature control path.