Basf Se Corporation

Kolon Plastics, Inc.

Dow Global Technolgoies LLC

Marvin Kramp

Bernd Metzen

Joaquim Henrique Teles

Ulrich Mueller

Andrei-Nicolae Parvulescu

Markus Weber

Dominic Riedel

Ulrike Wegerle

Daniel Urbanczyk

Nicolai Tonio Woerz

Christian Mueller

Thomas Heitz

Tobias Keller

JongMoon Kim

Heiner Schelling

Meinolf Weidenbach

Manfred Heilig

Werner J Witzl

In Gi Cho

HyunSoo Chang

Achim Stammer

Claus Hechler

Ortmund Lang

Josef Macht

Piotr Makarczyk

Christian Kunkelmann

Jin-Sang Choi

Gregor Grackiewicz

Matthias Wilhelm Meier

Karsten Luecke

In-Gi Cho

Jongmoon Kim

Sang-Yup Lee

Tile Gieshoff

Yunfei Zhou

Markus Gitter

Joong Kyu Chung

Jong-Moon Kim

The invention relates to an apparatus for carrying out mass transfer processes, comprising a column having at least two inlet pipes for introducing a gaseous phase, where separation-active internals are accommodated in the column and a column section extends from the at least two inlet pipes to the separation-active internals, in which section a coverage of a cross-sectional area of the column is less than 25%, based on the total cross-sectional area, and where the at least two inlet pipes have a height offset which corresponds to not more than three times an inlet pipe diameter and the at least two inlet pipes are at an angle (α) of from 60° to 150° to one another and have asymmetry with respect to one another. The invention further relates to a use of the apparatus and also a method for designing the apparatus.

Device for carrying out material exchange processes

The present invention relates to a process for preparing dioxolane by reacting ethylene glycol with an aqueous solution of formaldehyde in the presence of an acid catalyst. The raw product comprising water, dioxolane and methanol is fed to a phase separation unit () wherein an organic extracting agent is present. An organic fraction stream from the phase separation unit is transferred to an upper part of a purification column () from which dioxolane is withdrawn as a bottom product while the distillate stream of the purification column is recycled to the phase separation unit. An aqueous fraction stream from the phase separation unit is transferred to a waste water column (), withdrawing a waste water stream from the bottom of the waste water column, withdrawing a side stream () from a stage between the feed stage and the reflux stage of the waste water column and recycling this stream () to the phase separation unit, and withdrawing a distillate stream () containing methanol from the waste water column.

Process for preparing dioxolane

The present invention relates to a process for preparing dioxolane by reacting ethylene glycol with an aqueous solution of formaldehyde in the presence of an acid catalyst. The raw product comprising water, dioxolane and methanol is fed to a phase separation unit () wherein an organic extracting agent is present. An organic fraction stream from the phase separation unit is transferred to an upper part of a purification column () from which dioxolane is withdrawn as a bottom product while the distillate stream of the purification column is recycled to the phase separation unit. An aqueous fraction stream from the phase separation unit is transferred to a waste water column (), withdrawing a waste water stream from the bottom of the waste water column, recycling a distillate stream () from the waste water column to the phase separation unit, and withdrawing a side stream () containing methanol from a stage below the feed stage of the waste water column.

The invention relates to a process for preparing propylene oxide, comprising (i) providing a stream comprising propene, propane, hydrogen peroxide or a source of hydrogen peroxide, water, and an organic solvent; (ii) passing the liquid feed stream provided in (i) into an epoxidation zone comprising an epoxidation catalyst comprising a titanium zeolite, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation zone, obtaining a reaction mixture comprising propene, propane, propylene oxide, water, and the organic solvent; (iii) removing an effluent stream from the epoxidation zone, the effluent stream comprising propene, propane, propylene oxide, water, and the organic solvent; (iv) separating propene and propane from the effluent stream by distillation, comprising subjecting the effluent stream to distillation conditions in a distillation unit, obtaining a gaseous stream (S) which is enriched in propene and propane compared to the effluent stream subjected to distillation conditions, and a liquid bottoms stream (S) which is enriched in propylene oxide, water and organic solvent compared to the effluent stream subjected to distillation conditions; (v) separating propane from the stream (S) in a separation zone, comprising subjecting the stream (S) to washing conditions in a scrubber, wherein a solvent mixture comprising organic solvent and water is added as entraining agent, obtaining a bottoms stream (S), which comprises organic solvent, water and at least 70 weight-% of the propene comprised in (S); and a gaseous top stream (S), which comprises at least 5 weight-% of the propane comprised in stream (S).

Propene recovery by scrubbing with a solvent/water mixture

The present invention relates to a process for energy recovery in a process for the preparation of 1,3,5-trioxane.

Energy recovery in a method for preparing 1,3,5-trioxane

Disclosed is a process for purifying propylene oxide. A stream Scontaining propylene oxide, acetonitrile, water, and an organic compound containing one or more of acetone and propionaldehyde is provided. Propylene oxide is separated from Sby subjecting Sto distillation in a first distillation unit, obtaining a gaseous top stream Senriched in propylene oxide, a liquid bottom stream Senriched in acetonitrile and water, and a side stream Scontaining propylene oxide and enriched in the carbonyl compound; reacting the carbonyl compound in Swith an organic compound containing an amino group to obtain a reaction product; separating propylene oxide from the reaction product in a second distillation unit, obtaining a gaseous top stream Senriched in propylene oxide and a liquid bottoms stream Senriched in the reaction product; and introducing stream Sinto the first distillation unit.

Process for purifying propylene oxide

Disclosed herein is a process for purifying propylene oxide, including the steps of: (i) providing a stream S0 containing propylene oxide, acetonitrile, water, and an organic compound containing a carbonyl group &#x2014;C(&#x2550;O)&#x2014;; and (ii) separating propylene oxide from the stream S0 by subjecting the stream S0 to distillation conditions in a distillation column to obtain a gaseous top stream S1c which is enriched in propylene oxide compared to the stream S0, a liquid bottoms stream S1a which is enriched in acetonitrile and water compared to the stream S0, and a side stream S1b containing propylene oxide which is enriched in the carbonyl compound compared to the stream S0.

The present invention is related to a process for preparing propylene oxide, comprising (i) providing a stream comprising propene, hydrogen peroxide or a source of hydrogen peroxide, water, and an organic solvent; (ii) passing the liquid feed stream provided in (i) into an epoxidation zone comprising an epoxidation catalyst comprising a titanium zeolite, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation zone, obtaining a reaction mixture comprising propene, propylene oxide, water, and the organic solvent; (iii) removing an effluent stream from the epoxidation zone, the effluent stream comprising propylene oxide, water, organic solvent, and propene; (iv) separating propene from the effluent stream by distillation, comprising (iv.1) subjecting the effluent stream to distillation conditions in a distillation unit, obtaining a gaseous top stream Senriched in propene compared to the effluent stream subjected to distillation conditions, and a liquid bottoms stream Senriched in propylene oxide, water and organic solvent compared to the effluent stream subjected to distillation conditions; (iv.2) returning a condensed portion of the stream Sto an upper part of the distillation unit.

Process for preparing propylene oxide

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Ludwigshafen, Germany

Marvin Kramp