The disclosure provides a flushing process for removing polymer fouling from a reactor including a gas distributor proximal to the bottom thereof and an internal condenser proximal to the top thereof, the method including, for a first flushing time period, injecting a flushing solvent into the reactor and withdrawing the flushing solvent from a reactor outlet proximal to the internal condenser to induce an upward movement of flushing solvent, the withdrawn flushing solvent containing a first polymer content. After the first flushing time period is complete, for a second flushing time period, the process includes injecting a flushing solvent into the reactor and withdrawing the flushing solvent from a reactor outlet proximal to the gas distributor to induce a downward movement of flushing solvent, the withdrawn flushing solvent containing a second polymer content.

The present disclosure provides devices and systems that utilize concurrent and countercurrent exchange platforms to produce purified silicon.

A lipid feedstock including fatty acid(s) is treated in a process flow through a moving bed reactor with catalyst to produce a treated stream. The catalyst may include metal oxide catalyst on a particulate oxide support. The catalyst may be transferred, using a catalyst withdrawal line, from the bottom of the moving bed reactor to a fluidized bed regenerator, and regenerated. The catalyst may be transferred from the fluidized bed regenerator to a cyclone that separates the catalyst from flue gas. The catalyst may be transferred from the cyclone to the top of the moving bed reactor using a catalyst feed line. A first separation gas may be flowed into the catalyst feedline, and a second separation gas may be flowed into the bottom of the moving bed reactor or into the catalyst withdrawal line, to generate pressure differentials driving the process flow through the moving bed reactor.

Disclosed is a fluidized catalytic cracking regeneration apparatus and application thereof. The fluidized catalytic cracking regeneration apparatus comprises a coke supplemental device, a regenerator and an external catalyst circulation pipe, wherein an outlet of the coke supplemental device is in fluid communication with an inlet of the regenerator, the external catalyst circulation pipe connects a lower portion of the regenerator to the coke supplemental device for returning part of catalyst in the regenerator to the coke supplemental device, the coke supplemental device is provided with an inlet for spent catalyst, an inlet for oxygen-lean gas, and an inlet for fuel oil, and an inlet for oxygen-rich gas is disposed at bottom of the regenerator, wherein the inlet for fuel oil is disposed at a position downstream of the inlet for spent catalyst along a direction of stream flow.

The present disclosure provides devices and systems that utilize concurrent and countercurrent exchange platforms to produce purified silicon.

The present disclosure provides devices and systems that utilize concurrent and countercurrent exchange platforms to produce purified silicon.

The present disclosure provides devices and systems that utilize concurrent and countercurrent exchange platforms to produce purified silicon.

The present disclosure provides devices and systems that utilize concurrent and countercurrent exchange platforms to produce purified silicon.

The present invention relates to a novel CLC plant and to a novel CLC method employing a cyclone oxidation reactor to oxidize the oxygen carrier.

Methods for distributing catalyst in a counter-current reactor may include passing the catalyst from a catalyst hopper to a perforated plate distributor; distributing the catalyst into a reaction zone of the counter-current reactor by passing the catalyst from a catalyst discharge zone, through the perforations of the perforated plate distributor, into the reaction zone, wherein the catalyst enters the perforations of the perforated plate distributor at a superficial velocity from 0.01 m/s to 10 m/s, and the superficial velocity is in a substantially downward direction; and passing a hydrocarbon feed stream into the reaction zone, wherein the catalyst moves in a substantially downward direction through the reaction zone, the hydrocarbon feed stream moves in a substantially upward direction through the reaction zone, and wherein contacting the catalyst with the hydrocarbon feed stream cracks one or more components of the hydrocarbon feed stream and forms a hydrocarbon product stream.