Device for metering powder, in particular in clean-rooms, which includes a vessel containing powder and a sealing head with a septum for the vessel, wherein the sealing head is connectable powder-tight with the vessel and the septum powder-tight with the sealing head and the device further includes a vessel holder, which serves to hold the sealing head of the vessel, and the vessel with its opening points downwards, so that the powder can flow out of the vessel, wherein a gap is provided between the sealing head and a holding bowl of the vessel holder, in which a gas flow between the holding bowl and the sealing head can be created. The invention also relates to a use of the device and a metered addition method.

Device for metering powder, in particular in clean-rooms, which includes a vessel containing powder and a sealing head with a septum for the vessel, wherein the sealing head is connectable powder-tight with the vessel and the septum powder-tight with the sealing head and the device further includes a vessel holder, which serves to hold the sealing head of the vessel, and the vessel with its opening points downwards, so that the powder can flow out of the vessel, wherein a gap is provided between the sealing head and a holding bowl of the vessel holder, in which a gas flow between the holding bowl and the sealing head can be created. The invention also relates to a use of the device and a metered addition method.

Disclosed is a catalyst pre-contact method for the continuous polymerization of an olefin, wherein a primary catalyst, a co-catalyst and, optionally, an external electron donor are mixed and then undergo a pre-contact reaction, with the pre-contact reaction temperature being −30° C. to 35° C. and adjustable, and the pre-contact reaction time being 0.5 min to 10 min and adjustable, and the pre-contacted catalyst is brought into a catalyst prepolymerization system and then into a catalyst polymerization system, or is directly brought into the catalyst polymerization system. Further disclosed is a catalyst pre-contact device for the continuous polymerization of an olefin, which can adjust the pre-contact time and pre-contact temperature of the catalyst so that the performance of the catalyst achieves a better level according to the process.

A continuous acoustic chemical microreactor system is disclosed. The system includes a continuous process vessel (CPV) and an acoustic agitator coupled to the CPV and configured to agitate the CPV along an oscillation axis. The CPV includes a reactant inlet configured to receive one or more reactants into the CPV, an elongated tube coupled at a first end to the reactant inlet and configured to receive the reactants from the reactant inlet, and a product outlet coupled to a second end of the elongated tube and configured to discharge a product of a chemical reaction among the reactants from the CPV. The acoustic agitator is configured to agitate the CPV along the oscillation axis such that the inner surface of the elongated tube accelerates the one or more reactants in alternating upward and downward directions along the oscillation axis.

A method for determining polymer concentration can include synthesizing a polymer in a reactor under a set of parameters, wherein the reactor comprises a solution mixture having a refractive index, and wherein the solution mixture comprises a solvent, a polymer, and optionally a monomer, wherein the solution mixture has a polymer concentration; measuring the refractive index of the solution mixture; comparing the refractive index of the solution mixture with a calibration curve; and identifying the polymer concentration in the solution mixture. A system for determining polymer concentration can include a reactor containing a solution mixture comprising a solvent, a polymer, and optionally a monomer; a flash vessel fluidly coupled to the reactor to receive the solution mixture from the reactor; and a first refractometer fluidly coupled to the reactor, placed between the reactor and the flash vessel, and configured to measure a refractive index of the solution mixture.

Device for metering powder, in particular in clean-rooms, which includes a vessel containing powder and a sealing head with a septum for the vessel, wherein the sealing head is connectable powder-tight with the vessel and the septum powder-tight with the sealing head and the device further includes a vessel holder, which serves to hold the sealing head of the vessel, and the vessel with its opening points downwards, so that the powder can flow out of the vessel, wherein a gap is provided between the sealing head and a holding bowl of the vessel holder, in which a gas flow between the holding bowl and the sealing head can be created. The invention also relates to a use of the device and a metered addition method.

A housing having a heatable housing jacket, which surrounds a treatment chamber and forms a rotationally symmetrical treatment surface extending in the axial direction, and a drivable rotor, arranged in the treatment chamber and extending coaxially, for producing a material film on the treatment surface. The rotor comprises a hollow shaft, arranged in a manner distributed over the circumference of which are spreading elements. The hollow shaft surrounds a condensation space, in which a condenser is arranged. At least some of the spreading elements are configured as transport elements, which impart a transporting component to the material in the direction from the material inlet to the material outlet. Some of the spreading elements are configured as transport elements and some as distributing elements, which project from the hollow shaft and which comprise teeth, the shearing edge of which encloses an angle of less than 45 relative to the axial direction.

A continuous slurry-bed tank reactor, comprising a tank reactor body, an agitator, and tubular separation membranes. A method of using the continuous slurry-bed tank reactor comprising adding a catalyst, feeding reactants, stopping feeding the reactants, starting a heating system, changing directions of the reactants flowing through the tubular separation membranes.

A reactor for coating particles includes a stationary vacuum chamber to hold a bed of particles to be coated, a vacuum port in an upper portion of the chamber, a chemical delivery system configured to inject a reactant or precursor gas into a lower portion of the chamber, a paddle assembly, and a motor to rotate a drive shaft of the paddle assembly. The lower portion of the chamber forms a half-cylinder. The paddle assembly includes a rotatable drive shaft extending through the chamber along the axial axis of the half cylinder, and a plurality of paddles extending radially from the drive shaft such that rotation of the drive shaft by the motor orbits the plurality of paddles about the drive shaft.

A reactor comprising a first portion having a generally cylindrical housing, an inlet at one end of said first portion housing, the opposed end of said first portion housing being the outlet of said first portion, where said first portion includes a rotatable shaft positioned axially within said housing and including at least two shearing paddles extending radially from said rotatable shaft and a second portion having a generally frustoconical housing having a first end larger than a second end, said first end constituting an inlet to said second portion and coextensive with said opposed end of said first portion housing, and an outlet at said second end, where said second portion includes a rotatable shaft positioned axially within said housing and including at least one generally helical flight extending radially from said rotatable shaft.