A process and apparatus wherein a process material comprising two or more distinct phases are fed continuously to a tubular reactor containing an agitator wherein as the phases flow along the reactor the agitator displaces at least part of a first phase from its natural position to within a second phase where it is distributed within the second phase by the agitator and the agitator is designed to allow the first phase that is distributed within the second phase to flow naturally back towards its natural distinct position within the reactor as the phases pass through the reactor, useful for mixing and/or reacting liquid/liquid; gas/gas and liquid/gas mixtures as well as solid liquid mixtures.

An online measurement device for crystal size and shape in a high-solid-content crystallization process includes a solution amplifier, a measurement device, a peristaltic pump, a crystallization kettle, a dilution device and a solution storage tank. A crystal-containing solution is arranged in the crystallization kettle; an inner wall of the solution amplifier is smooth, one end is an amplification end, and the other end is a contraction end. The contraction end is communicated with one end of the solution storage tank and one end of the crystallization kettle. The amplification end is communicated with the dilution device and the peristaltic pump. The peristaltic pump is communicated with the other end of the crystallization kettle. The solution amplifier, the peristaltic pump and the crystallization kettle form a complete passage through a pipeline. A measurement instrument of the measurement device is arranged at the outer side of the solution amplifier.

A cyclone pre-separator for positioning on a particle collecting container, the cyclone pre-separator including a box-shaped housing and a cyclone unit arranged in the housing, the cyclone unit including an air inlet, an air outlet, and a particle outlet arranged on a underside of the cyclone pre-separator, where the housing has an air inlet hose port connected to the air inlet and an air outlet hose port connected to the air outlet, and has lower housing couplers, adapted to provide a releasable, vertically tension-proof coupling to the particle collecting container, when the cyclone pre-separator is positioned on the particle collecting container.

A surface cleaning apparatus comprises an air treatment chamber with a moveable member positioned therein. An end wall of the air treatment chamber is openable in response to a moveable member being longitudinally translated through at least the portion of the air treatment chamber. The driving assembly includes a handle and a drive rod that is rotatably mounted about a longitudinally extending axis of the drive rod between a stored position in which the moveable member is in a stored position and an operable position in which the moveable member is translatable through at least a portion of the chamber. In the stored position, the handle is longitudinally spaced from the first and second ends of the air treatment chamber and, when the driving assembly is in the operable position, the driving assembly is operable to longitudinally translate the moveable member through at least a portion of the chamber.

A method for preparing a purified styrene composition includes providing a crude hydrocarbon composition containing styrene, subjecting the crude hydrocarbon composition to a distillation in a divided-wall column to produce an overhead hydrocarbon stream, a bottom hydrocarbon stream and a side hydrocarbon stream and subjecting the side hydrocarbon stream to at least one crystallization step to obtain a purified styrene composition.

A method for preparing a purified styrene composition includes providing a crude hydrocarbon composition containing styrene, subjecting the crude hydrocarbon composition to a distillation in a divided-wall column to produce an overhead hydrocarbon stream, a bottom hydrocarbon stream and a side hydrocarbon stream and subjecting the side hydrocarbon stream to at least one crystallization step to obtain a purified styrene composition.

The present invention relates to process for separating p-phenylenediamine from a mixture containing o-phenylenediamine, aminobiphenyls and diphenylamine by means of distillation coupled with crystallization, wherein the distillation system consists of two divided wall columns and the crystallization comprises at least one stage suspension-based melt crystallization. A liquid fraction enriched in p-phenylenediamine obtained as the side-draw of the first divided wall column is sent to the subsequent suspension-based melt crystallization to produce substantially pure p-phenylenediamine. The overhead product of the first divided wall column is fed to the second divided wall column to produce highly pure o-phenylenediamine withdrawn from the side-draw of the second divided wall column.

The present invention relates to process for separating p-phenylenediamine from a mixture containing o-phenylenediamine, aminobiphenyls and diphenylamine by means of distillation coupled with crystallization, wherein the distillation system consists of two divided wall columns and the crystallization comprises at least one stage suspension-based melt crystallization. A liquid fraction enriched in p-phenylenediamine obtained as the side-draw of the first divided wall column is sent to the subsequent suspension-based melt crystallization to produce substantially pure p-phenylenediamine. The overhead product of the first divided wall column is fed to the second divided wall column to produce highly pure o-phenylenediamine withdrawn from the side-draw of the second divided wall column.

The present invention related to the use of compounds of general formula (I) for separations of rare earth elements (lanthanides) by precipitation, wherein R is selected from the group consisting of H; —CH2COOH; R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 areindependently selected from the group consisting of H; OH; —NO2; —COOH; phenyl; and/or R.sup.2 and R.sup.3 or R.sup.3 and R.sup.4 or R.sup.4 and R.sup.5 or R.sup.5 and R.sup.6 The invention further relates to a method of separation of rare earth elements by precipitation. together with two neighbouring carbon atoms of the aromatic ring form a six-membered aromatic ring.

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A method of crystallizing a solution (24) having at least one compound mixed (18) with a dissolving agent (20) is provided. The method includes performing a heating process by heating the solution (24) until a current temperature of the solution is equal to a predetermined treatment temperature, maintaining the current temperature at the predetermined treatment temperature for a predetermined treatment time period, performing a cooling process by cooling the solution (24) until the current temperature is less than the predetermined treatment temperature and a crystallization temperature of the at least one compound (18), causing formation of a plurality of crystal particles (30) of the at least one compound by cooling the solution until the current temperature is equal to a predetermined termination temperature of the at least one compound (18), and varying a particle size of each of the crystal particles (30) based on a cooling speed of the solution.