A hydrocyclone for separating a vapor from a carrier gas is disclosed. The hydrocyclone comprises one or more nozzles. A cryogenic liquid is injected to a tangential feed inlet at a velocity that induces a tangential flow and a cyclone vortex in the hydrocyclone. The carrier gas is injected into the cryogenic liquid, causing the vapor to dissolve, condense, desublimate, or a combination thereof, forming a vapor-depleted carrier gas and a vapor-enriched cryogenic liquid. The vapor-depleted carrier gas is drawn through a vortex finder and the vapor-enriched cryogenic liquid is drawn through an apex nozzle outlet. In this manner, the vapor is removed from the carrier gas.

A hydrocyclone for separating a vapor from a carrier gas is disclosed. The hydrocyclone comprises one or more nozzles. A cryogenic liquid is injected to a tangential feed inlet at a velocity that induces a tangential flow and a cyclone vortex in the hydrocyclone. The carrier gas is injected into the cryogenic liquid, causing the vapor to dissolve, condense, desublimate, or a combination thereof, forming a vapor-depleted carrier gas and a vapor-enriched cryogenic liquid. The vapor-depleted carrier gas is drawn through a vortex finder and the vapor-enriched cryogenic liquid is drawn through an apex nozzle outlet. In this manner, the vapor is removed from the carrier gas.

The present invention relates to a device and also to a method for separating and recovering a cyclic diester, in particular dilactide or glycolide from polymer melts which include the cyclic diester as impurity. The device and also the method according to the invention allow recovery of the cyclic diester with a high yield and at the same time high purity.

The present invention relates to a device and also to a method for separating and recovering a cyclic diester, in particular dilactide or glycolide from polymer melts which include the cyclic diester as impurity. The device and also the method according to the invention allow recovery of the cyclic diester with a high yield and at the same time high purity.

Systems and methods are described for removing solidifiable gas from a process gas stream by direct contact with a cold liquid. The process gas stream includes at least gas that is frozen by the cold liquid while one or more other gases of the process gas stream remain in a gaseous state. The process gas stream may include water, and will have a different composition than the cold liquid. The contacting of the cold liquid with the process gas stream may be at a pressure that is less than 200 psia, and optionally less than 100 psia, 50 psia, or even 30 psia, and the solidified gas may be removed from the contacting assembly as a slurry with cold liquid.

Systems and methods are described for removing solidifiable gas from a process gas stream by direct contact with a cold liquid. The process gas stream includes at least gas that is frozen by the cold liquid while one or more other gases of the process gas stream remain in a gaseous state. The process gas stream may include water, and will have a different composition than the cold liquid. The contacting of the cold liquid with the process gas stream may be at a pressure that is less than 200 psia, and optionally less than 100 psia, 50 psia, or even 30 psia, and the solidified gas may be removed from the contacting assembly as a slurry with cold liquid.

Devices, systems, and methods for siphoning heat exchange or reaction for solids production are disclosed. Passing a contact fluid through a siphoning device, wherein the siphoning device is made of a contact fluid inlet, a carrier fluid inlet, and an outlet, and wherein the contact fluid passes through the contact fluid inlet, inducing a siphon in the carrier fluid inlet. This siphon then siphons a carrier fluid through the carrier fluid inlet and into the contact fluid. The carrier fluid is, in part, made of a first component. The carrier fluid and the contact fluid mix. This mixing produces a product solid, wherein the product solid is produced from the first component by desublimation, condensation, solidification, crystallization, precipitation, reaction with the contact fluid, or a combination thereof of at least a portion of the first component. The product solid passes through the outlet.

The invention provides a device for full-automatic, ultra-low pressure, fractionation-free and non-destructive extraction of water, including a control box, an extraction part, an ultra-low temperature cold trap and a transmission device, wherein the control box and the extraction part are located at the top of a cabinet, the ultra-low temperature cold trap is located inside the cabinet, a touch screen is arranged on the control box, a temperature control meter is arranged on a side face of the control box, the extraction part includes an upper layer plate, a middle layer plate, a bottom plate and a test tube, the bottom plate is fixedly installed on the cabinet, the test tube is accommodated in the ultra-low temperature cold trap, and the transmission device is fixedly installed on the bottom plate. The invention has the beneficial effects of being able to extract a plurality of samples at the same time, so the extraction efficiency is high; and no liquid nitrogen or organic solvent is required, thereby reducing the environmental pollution.

Devices, methods, and systems for stripping a vapor from a gas are disclosed. A carrier gas is bubbled through a liquid coolant in a vessel. The vessel contains a mesh screen, packing materials, or combinations thereof. The carrier gas has a vapor component. The vapor component condenses, freezes, deposits, desublimates, or a combination thereof out of the carrier gas onto the mesh screen, the packing material, or combinations thereof, as a solid component. The solid component dissolves into the coolant as the coolant passes through the mesh screen, the packing material, or combinations thereof.

Devices, methods, and systems for stripping a vapor from a gas are disclosed. A carrier gas is bubbled through a liquid coolant in a vessel. The vessel contains a mesh screen, packing materials, or combinations thereof. The carrier gas has a vapor component. The vapor component condenses, freezes, deposits, desublimates, or a combination thereof out of the carrier gas onto the mesh screen, the packing material, or combinations thereof, as a solid component. The solid component dissolves into the coolant as the coolant passes through the mesh screen, the packing material, or combinations thereof.