Abstract:
A reactor and associated process for the high-pressure synthesis of melamine from urea, comprising a primary step of conversion of the urea into crude melamine inside a first chamber delimited by a shell inside a reactor body and a secondary step of stripping said crude melamine melt inside a second reaction chamber, which is coaxial with and situated outside said first chamber, inside the same reactor body.
Abstract:
An apparatus is described which includes at least one reactor, at least one linear piston pump, the or each piston pump including a tube, a piston and an arm coupled to the piston, the or each piston pump arranged to inject feedstock to a respective reactor, a beam or plate coupled to the arm(s) of the piston pump(s) configured to linearly drive the piston(s) and a linear actuator for driving the beam or plate. The piston pump has a volume of at least 50 milliliters and an output port having a diameter of at least 5 mm.
Abstract:
A reagent delivery method includes placing a reagent delivery column including a plurality of reagent storage elements therein in a centrifugal device, coupling a breaching element to the housing, and rotating the centrifugal device to force the reagent storage elements toward the breaching element, breaching of the reagent storage elements releasing reagent therein and communicating the same to an external environment. A reagent delivery system includes a column having a housing, a plurality of reagent storage element sheets positioned in the housing or forming a stack, a plurality of breaching elements, and a microplate having a plurality of wells, the microplate coupled to the housing where each well corresponds or aligns with a breaching element and a reagent storage element. The system can be rotated in a centrifugal device to force the reagent storage element stacks toward the breaching elements.
Abstract:
The present invention provides a quantitative catalyst supply device that supplies a predetermined amount of catalyst slurry through an injection port formed through a container bottom. The quantitative catalyst supply device includes: an extendible supply pipe connected to a hopper and filled with catalyst slurry; a head connected to the supply pipe and supplying catalyst slurry to the injection port at the container bottom; a cylinder connected to a side of the supply pipe and supplying a predetermined amount of catalyst slurry through the head; and valve units disposed in an upper portion and a lower portion of the supply pipe spaced from the cylinder and opened or closed by operation of the cylinder.
Abstract:
To provide a polymer production apparatus, which contains: a first supply unit configured to supply raw materials including a monomer; a second supply unit configured to supply a compressive fluid; a contact unit configured to bring the monomer into contact with the compressive fluid; and a reaction unit configured to allow the monomer, which has been brought into contact with the compressive fluid, to react in the presence of the compressive fluid, wherein the reaction unit contains one, or two or more extrusion devices, and one, or two or more stirring devices.
Abstract:
A micro fluid dosing unit includes a test container containing biomaterial needing oxygen. The test container has at least one first container which contains water and at least one second container which contains a pharmacological substance, wherein the first and the second containers have a container outlet leading to the test container and are mounted on a common valve carrier plate containing control channels, which includes control channel ports for control valves to be coupled thereto. In the valve carrier plate a separate valve control chamber is formed for each container, which is sealed by a membrane, wherein associated container outlets are opened and closed by the membrane movement.
Abstract:
A parallel addressing method includes selectively addressing, according to a wrap-around addressing scheme, a first sub-set of a plurality of dispensers for parallel addressing of the first sub-set adjacent to a first area of a row; and then selectively address, according to the wrap-around addressing scheme, a second sub-set of the plurality of dispensers that is different from the first sub-set for parallel addressing of the second sub-set adjacent to a second area of the same row that is different than the first area. A computer program product and a multi-channel dispenser system are also disclosed herein.
Abstract:
The invention provides a method and apparatus for continuously feeding wet gel polymers into a drying step of a dry polymer synthesis operation. A number of pistons are arranged having inner chambers through which monomers and other reagents are fed and polymerized into wet gel polymers. Each piston operates according to a coordinated schedule so that as one piston finishes extruding polymer into the drying step, a second piston has completed polymerizing more polymer and continues to feed more polymer without interruption. The then finished is re-fed more reagents so as to be ready again when needed next. As a result, cost effective continuous feeding can be achieved without the contamination and impurity problems that have plagued previous attempts to accomplish this.
Abstract:
A device for polymerizing lactams in molds, comprising: a reservoir for storing lactam, wherein said reservoir is kept at a temperature which varies in the range of 135-150° C. for melting the lactam and keeping it in melted state; lactam feeding means comprising dosing pipes for feeding the lactam from the reservoir, first dosing means for feeding an initiator; second dosing means for feeding an activator; a mixing head configured to receive the lactam, the initiator and the activator from respectively said lactam feeding means, said first dosing means and said second dosing means. The initiator and activator are liquid, and the cited reservoir and lactam feeding means are located within a heater configured to maintain the temperature of the lactam at a substantially constant value until it reaches the mixing head.
Abstract:
Disclosed is a method for carrying out a chemical reaction in a reactor, at least one substance is present in a container that is closed in a gas-tight manner, is introduced into the reactor in said container and is released by breaking open the container. The container is designed such that it breaks open when a specified bursting pressure difference between the internal pressure and external pressure is exceeded. The container is broken open and the substance located in the container is thus released as a result of deliberate application in the reactor of a pressure difference exceeding the bursting pressure difference.