Ineos Phenol & Gmbh Co., Kg

Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Huels Aktiengesellschaft

Phenolchemie Gmbh & Co. Kg

Christoph Schwarz

Hartwig Rauleder

Manfred Neumann

Hermann-Josef Korte

Markus Weber

Uwe Tanger

Jochen Ullrich

Anton Schoengen

Frank Kropfgans

Volker Brehme

Manfred Weber

Thomas Jostmann

Harald Seiler

Mirko Michel

Dorothea Schwarz

Ingo Pauli

Andreas Nelte

The invention relates to a method for yielding boron-depleted chlorosilanes from a chlorosilane mixture containing boron by means of separation by distillation of a boron-enriched distillation flow. The invention further relate to a device for yielding boron-depleted chlorosilanes from a chlorosilane mixture containing boron.

Processing of chlorosilane flows containing boron

To improve energy efficiency of prior art processes while preserving the standards of quality and total yield of desired end products, a process for the preparation of phenolic compounds is proposed. The process of the invention comprises working-up of the cleavage product mixtures by distillation, which comprises resolving the cleavage product mixture into at least three fractions in a single distillation step by feeding the cleavage product mixture to the side of a distillation column, removing a first fraction comprising the ketone at the top of the distillation column, removing a second fraction comprising the phenolic compound at the bottom of the distillation column, and removing a third fraction comprising unreacted the alkylaryl compound and the hydroxy ketone, and water, as side stream, whereby the side stream take-off is situated above the feed of cleavage product mixture to the distillation column, characterized by removing heat from the distillation column, whereby the heat take-off is situated above the side stream take-off of the third fraction, and a process for separating phenol from cleavage product mixtures, wherein the cleavage product mixture prior feeding into the distillation column, is preheated to a temperature of above 70&#xb0; C. at standard pressure, preferably to a temperature of above 100&#xb0; C., more preferably to a temperature between 110&#xb0; C. and 180&#xb0; C., most preferred to a temperature of about 140&#xb0; C. to 146&#xb0; C., and an apparatus suitable therefore.

Process for the preparation of phenolic compounds, for separating phenol from cleavage product mixtures, and an apparatus

Process and apparatus for the work-up by distillation of cleavage product mixtures produced in the cleavage of alkylaryl hydroperoxides

Phenol is separated from a mixture containing hydroxyacetone, cumene, water and phenol, by fractionating the mixture in a process with a fractional distillation step and a phase separation step to provide a single phenol fraction containing less than 300 ppm of hydroxyacetone. In the work-up by distillation of cleavage product mixtures, the hydroxyacetone can be removed from the cleavage product mixture together with a phenol fraction from which the hydroxyacetone has to be removed. A process can be used for purifying cleavage product mixtures obtained in the cleavage of alkylaryl hydroperoxides such as cumene hydroperoxide. The process allows separation of phenol and acetone from mixtures obtained in the cleavage of cumene hydroperoxide.

Process for separating phenol from a mixture comprising at least hydroxyacetone, cumene, water and phenol

Manufacturing process for aminoalkyl silanes

A process for the preparation of terephthalic acid (TA) from pure dimethyl terephthalate (DMT) and/or DMT intermediate product by hydrolysis in a countercurrent reactor at a conversion of greater than 99% and crystallization to give the solid product, characterized in that the sum of the stripping steam (S) and reaction water (W) satisfies the relationship

Process for the preparation of terephthalic acid and its isomers

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Marl, Germany

Christoph Schwarz