Basf Aktiengesellschaft

Basf Se Corporation

Franz Borgel

Alfred Krause

Wolfgang Reif

Frank-Friedrich Pape

Tilman Sirch

Gerd-Dieter Tebben

Armin Diefenbacher

Anton Meier

Roland Krokoszinski

Mirko Kreitschmann

Ludwig E Heck

Michael Salla

A method for reliably avoiding backflow in the transport of a liquid under pressure via a transport pipe (), in which a shut-off device () with differential pressure switching is arranged, into a container () which is under pressure and which comprises the liquid to be transported and/or another liquid is proposed, wherein a pressure accumulator () which is filled with the liquid to be transported up to a certain level and above the liquid level, in direct contact with the liquid to be transported, with an inert gas is arranged in the transport pipe () upstream from the shut-off device () in the transport direction, the inert gas being provided in the pressure accumulator () under an excess pressure and in an amount relative to the container () to be filled which are designed so that, in the case of a drop in the pressure in the transport pipe (), the inert gas ensures a positive pressure difference in the transport pipe () to the container () over a period which is at least as long as the reaction time of the shut-off device () and the shut-off device () has an emptying pipe () with emptying valve ().

Method for safely preventing backflowing in the conveying of a fluid

The present invention provides a process for preparing 1,6-hexanediol from a carboxylic acid mixture which comprises adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols and is obtained as a by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-containing gases and by water extraction of the reaction mixture, by esterification of the acids and hydrogenation, in which

Method for producing 1, 6 hexane diol

Process for recycling a liquid hydroformylation discharge

Growing community of inventors

Dirmstein, Germany

Franz Borgel