Abstract:
The invention relates to a method for producing cyclohexane by isomerizing a hydrocarbon mixture (KG1) containing methylcyclopentane (MCP) in the presence of a catalyst. The catalyst is preferably an acidic ionic liquid. A flow (S1) originating from a steam cracking process is used as a starting material. The hydrocarbon mixture (KG1) is obtained from said stream (S1) in a device for removing aromatics. The hydrocarbon mixture has a reduced aromatic content in comparison with the flow (S1). (KG1) can also be (nearly) free of aromatics. In dependence on the type and amount of the aromatics remaining in the hydrocarbon mixture (KG1), in particular if benzene is present, a hydrogenation of (KG1) additionally can be performed before the isomerization. Furthermore, additional purification steps can optionally be performed before or after the isomerization or hydrogenation in dependence on the presence of other components of (KG1). Preferably high-purity cyclohexane (in accordance with specifications) is isolated from the hydrocarbon mixture (KG2) arising during the isomerization, wherein the specifications are given, for example, by the use of the cyclohexane for the production of caprolactam known to the person skilled in the art.
Abstract:
The invention relates to a method for separating a phase (A) containing at least one ionic liquid from a phase (B), phase (A) being more viscous than phase (B). Said method comprises the following steps: a) providing a stream (S1) containing a dispersion (D1) in which phase (A) is dispersed in phase (B); b) introducing stream (S1) into a phase separation unit (PT1) containing a knitted fabric, preferably a knitted glass fiber fabric; c) separating the dispersed phase (A) from phase (B) in the phase separation unit (PT1); d) discharging a stream (S2) comprising at least 70 wt.%, preferably at least 90 wt.%, of phase (A) from the phase separation unit (PT1); and e) discharging a stream (S3) comprising at least 70 wt.%, preferably at least 90 wt.%, of phase (B) from the phase separation unit (PT1).
Abstract:
The present invention relates to an extraction column (1) comprising, at least in sections, a cylindrical, vertically orientated column body (2), said column body forming a hollow column space (3) having a maximum horizontal extension, wherein within the column body (2) are arranged at least one first inlet (4) for an extractant, at least one second inlet (5) for the fluid to be extracted, and at least one outlet (6) for the extractant mixture and at least one outlet for the raffinate. The extraction column (1) according to the invention is characterized in that a vertically oriented dividing device (7) is arranged within the hollow column space (3) that divides the hollow column space (3) into several vertically oriented and horizontally separated areas, wherein the maximum horizontal extent of each area is smaller than the maximum horizontal extent of the hollow column space (3). The invention further relates to a method for extracting a component from a fluid by means of such an extraction column (1).
Abstract:
The invention relates to a method for separating a phase (A) containing at least one ionic liquid from a phase (B), phase (A) being more viscous than phase (B). Said method comprises the following steps: a) providing a stream (S1) containing a dispersion (D1) in which phase (A) is dispersed in phase (B); b) introducing stream (S1) into a coalescing filter (K) made of acrylic phenolic resin; c) separating the dispersed phase (A) from phase (B) in the coalescing filter (K); d) discharging a stream (S2) comprising at least 70 wt.%, preferably at least 90 wt.%, of phase (A) from the coalescing filter (K); and e) discharging a stream (S3) comprising at least 70 wt.%, preferably at least 90 wt.%, of phase (B) from the coalescing filter (K).
Abstract:
The invention relates to a method for separating a phase (A), which contains at least one ionic liquid, from a phase (B), wherein the phase (A) has a higher viscosity than the phase (B), comprising the following steps: a) providing a current (S1) containing a dispersion (D1), in which the phase (A) is dispersed in the phase (B), b) introducing the current (S1) to a coalescing device (KV), wherein the inflow velocity of the current (S1) equals 0.05 to 150 kg/(cm 2 *h) based on the average cross-sectional area of the coalescing device (KV). c) separating the dispersed phase (A) from the phase (B) in the coalescing device (KV), d) channeling out a current (S2) comprising at least 70 wt%, preferably at least 90 wt% of phase (A) from the coalescing device (KV) and e) channeling out a current (S3) comprising at least 70 wt%, preferably at least 90 wt% of phase (B) from the coalescing device (KV).
Abstract:
The invention relates to a method for separating a phase (A) from a phase (B), phase (A) being more viscous than phase (B). In said method, the direction of dispersion, in which phase (B) is dispersed in phase (A), is inversed so that phase (A) is dispersed in phase (B), the inversion being created by recirculating a stream containing an excess of phase (B).