Abstract:
The invention relates to a method for producing 1,2-propandiol, wherein a flow containing glycerine, in particular a flow produced on an industrial scale during the production of biodiesel, is subjected to low-pressure hydrogenation.
Abstract:
The invention relates to a method for producing 1,2-propandiol, wherein a flow containing glycerine, in particular a flow produced on an industrial scale during the production of biodiesel, is subjected to hydrogenation in a two-step reactor cascade.
Abstract:
The invention relates to a pipeline system comprising at least one pipeline loop (9) which is connected to a collector (7) at one end and to a distributor (5) at a second end. The collector (7) and the distributor (5) are arranged one above the other. When the collector (7) lies above the distributor, pressurized gas can be supplied to the collector, and the distributor (5) is connected to an emptying container (21); and when the distributor (5) lies above the collector, pressurized gas can be supplied to the distributor (5), and the collector (7) is connected to an emptying container (21), said emptying container (21) lying lower than the collector (7) and the distributor (5). The invention further relates to an emptying container (21) for receiving a liquid flowing through a pipeline system (3). The emptying container (21) is connected to the pipeline system (3) via an immersion pipe (33) protruding into the emptying container (21). The invention is characterized in that a siphon (41) is provided in the immersion pipe (33) between the pipeline system (3) and the emptying container (21), and the immersion pipe (33) can be heated, said siphon (41) being closed by a solidified material (43) during the operation of the pipeline system (3).
Abstract:
The present invention relates to a method for producing 1,2-propanediol from glycerin, comprising at least the steps of: (A) providing a glycerin flow G1, (B) desulfurization of the glycerin flow G1 from step (A) by hydrogenating with hydrogen at a pressure of 50 300 bar in the presence of a catalyst in order to obtain a glycerin flow G2, and (C) hydrogenating the glycerin flow G2 from step (B) with hydrogen in the presence of a catalyst, in order to obtain 1,2-propanediol.
Abstract:
The invention relates to a device for receiving hot, corrosive liquids (7), comprising a chamber enclosed by a wall (21) for receiving the liquid (7), wherein the chamber comprises an interior insulation (19). The invention further relates to a use of the device for storing corrosive liquids for storing a heat storage medium comprising sulfur.
Abstract:
The invention relates to a method for producing 1,2-propandiol, wherein a flow containing glycerine, in particular a flow produced on an industrial scale during the production of biodiesel, is subjected to hydrogenation in an at least three-step reactor cascade.
Abstract:
The invention relates to a container for storing a liquid which has a tendency to break down into gaseous breakdown products under the conditions prevailing in the container (1) and in which a chemical reaction equilibrium between the gaseous breakdown products and the liquid is established. The container (1) accommodates a floating roof (29) and said floating roof (29) comprises floaters (33) with the help of which the floating roof (29) floats on the liquid, the floating roof (29) being guided in the container (1) by means of a sliding seal (45). The invention further relates to a device for storing heat, comprising a first container (57) for storing a cooler liquid and a second container (59) for storing a liquid that is hotter than said liquid, and to a use of the container and the device for storing heat.
Abstract:
Use of a nitrate salt composition Z containing Z1 at least one alkali metal nitrate and optionally alkaline earth metal nitrate and Z2 at least one alkali metal nitrite and optionally alkaline earth metal nitrite in an amount of Z2 in the range from 1.1 to 15.0 mol% based on the sum of Z1 plus Z2 as heat transfer or heat storage medium in apparatuses in which these heat transfer or heat storage media are contained at a temperature in the range from 500°C to 620°C and an oxygen partial pressure over the nitrate salt composition in the range from 0.1 to 1.0 atm, characterized in that for a desired temperature selected from the abovementioned range and for a desired oxygen partial pressure selected from the abovementioned range the molar amount of the alkali metal nitrite and optionally alkaline earth metal nitrite is calculated with the following formula (formula I) in which the variables have the following meanings X
Abstract:
Planta de energía solar con un sistema de conductos, que contiene sal fundida como portador de calor, el cual presenta una presión de vapor inferior a 0,5 bar en la temperatura máxima de servicio; en donde además el sistema de conductos comprende al menos un conducto receptor (13), en el cual la sal fundida se calienta mediante energía solar irradiada, o un receptor central, así como al menos un recipiente de vaciado (21) y/o un depósito (15, 17) para la sal fundida; caracterizada porque el sistema de conductos comprende además un sistema pendular de gas (31), el cual interconecta espacios de gas de los recipientes utilizados en la planta de energía solar y que presenta un depósito de gas (35) central y/o una conexión de gas central (37) y/o una salida de gas de escape (39) central, a través de la cual el gas se puede expulsar al ambiente.
Abstract:
Uso de hexadeca-8,15-dienal de la fórmula I **(Ver fórmula)** o de una mezcla de sustancias que contiene este compuesto, como producto químico aromático.