摘要:
The invention relates to a method for purifying an ionic liquid, comprising the steps of (a) partially crystallizing the ionic liquid from its melt and (b) separating the crystalline crop from the remaining melt.
摘要:
The invention relates to a method for carrying out exothermic chemical equilibrium reactions in a fluidized bed reactor, wherein the temperature is distributed across the fluidized bed of the fluidized reactor and the temperature difference between the lowest and the highest temperature is at least 10 K. The invention also relates to a fluidized bed reactor for carrying out chemical reactions in a fluidized bed (5), which is characterized in that at least one heat exchanger (12, 28) is arranged in the fluidized bed (5) for controlling temperature distribution.
摘要:
The invention relates to a reactor and method for producing chlorine from hydrogen chloride by gas phase oxidation with oxygen in the presence of a heterogeneous catalyst in a fluidized bed, whereby gas-permeable plates are placed in the fluidized bed. The gas-permeable plates are connected in a thermally conductive manner to a heat exchanger located in the fluidized bed.
摘要:
The invention relates to a method for producing chlorine by oxidising hydrogen chlorine in a gaseous phase by means of a gas flow containing molecular oxygen and in the presence of a fixed bed catalyst. Said invention is characterised in that the inventive method is carried out in a reactor (1) comprising a bundle of parallel contact tubes (2) disposed in a direction of the reactor length whose ends are fixed to a tube plate (3), a convex cover (4) arranged on each end of the reactor (1), one or several annular deflecting sheets (6) which are arranged in a perpendicular direction with respect to the direction of length of the reactor in a space (5) between the contact tubes (2) in such a way that circular passage openings (8) are formed in the middle of the reactor. The inventive reactor also comprises one or several deflecting discoidal sheets (7) disposed in such a way that annular passages (9) are formed on the edge thereof, said deflecting annular (6) and discoidal (7) sheets being arranged in an alternate manner. According to said invention, the contacting tubes (2) are filled with the fixed bed catalyst, hydrogen chlorine and the gas flow containing molecular oxygen are channelled from one end of the reactor to the contact tubes (2) by means of one of said convex covers (4), a reaction gaseous mixture is extracted at the level of the opposite end of the reactor by means of the second convex cover (4) and a fluid heat-exchanging agent is channelled to the interspace (5) encompassing the contact tubes (2).
摘要:
The invention relates to methods for continuously producing chlorine by reacting hydrogen chloride with oxygen in the presence of a heterogeneous catalyst. To this end, the reaction of hydrogen chloride is limited to a level ranging from 15 to 90 % with a single pass through the reactor.
摘要:
The invention relates to a method for the production of chlorine by means of gas phase oxidation of hydrogen chlorine, comprising a gas flow containing molecular oxygen in the presence of a solid bed catalyst. The invention is characterised in that the method is carried out in a reactor (1) comprising thermal sheet-metal plates (2) which are arranged at a distance from each other and in a longitudinal direction of the reactor (1). Said thermal sheet-metal plates can be cross-flown by a heat carrier, comprising supply devices and removal devices (3, 4) for the heat carrier in order to form the thermal sheet-metal plates (2), in addition to gaps (5) which are arranged between the thermal sheet-metal plates (2) and which are filled with the solid bed catalyst and are guided into the gas flow containing the hydrogen chloride and the molecular oxygen.
摘要:
Disclosed is a method for producing chlorine by means of gas phase oxidation of hydrogen chloride with a gas flow containing molecular oxygen in the presence of a fixed-bed catalyst. Said method is carried out in a reactor (1) comprising a nest of contact tubes (2) that are disposed parallel to each other in the longitudinal direction of the reactor and are fastened within tube bottoms (3) at the ends thereof, a hood (4) that is arranged at both ends of the reactor (1), and one or several deflecting metal sheets (6) which are disposed perpendicular to the longitudinal direction of the reactor in the intermediate space (5) between the contact tubes (2) and alternately release opposite passages (7) located on the inner wall of the reactor (1). The contact tubes (2) are filled with the fixed-bed catalyst, the hydrogen chloride and the gas flow containing molecular oxygen are directed from one end of the reactor through the contact tubes (2) via a hood (4) and are withdrawn from the opposite end of the reactor via the second hood (4), and a liquid heat-exchanging substance is directed through the intermediate space (5) around the contact tubes (2).
摘要:
The invention relates to a method for production of chlorine by catalytic gas-phase oxidation of hydrogen chloride on a catalytic fixed bed comprising the steps: a) a feed gas stream (I), containing hydrogen chloride and a feed gas stream (II), containing oxygen are prepared, b) the feed gas stream (I), the feed gas stream (II), optionally a recycle stream (Ia), containing hydrogen chloride, optionally an oxygen-containing recycle stream (IIa) and a recycle stream (III) are fed into an oxidation zone and hydrogen chloride oxidised in the presence of a catalyst arranged in the fixed bed to give chlorine, whereby a product gas stream (IV) is obtained containing chlorine, unreacted oxygen, unreacted hydrogen chloride and water vapour, c) the recycle stream (III) is removed from the product gas stream (IV) and recycled to the oxidation zone, whereupon a product gas stream (IVa) remains. The ratio of the streams (III)/(IVa) is in general 0.005 to 3, preferably 0.2 to 1.5 and more preferably 0.4 to 1. The recycle stream (III) is preferably sucked off one or more of the gas streams (I), (II) and optionally (IIa) by means of a jet nozzle.
摘要:
Disclosed is a method for producing chlorine by means of gas phase oxidation of hydrogen chloride with a gas flow containing molecular oxygen in the presence of a fixed-bed catalyst. Said method is carried out in a reactor (1) comprising a nest of contact tubes (2) that are disposed parallel to each other in the longitudinal direction of the reactor and are fastened within tube bottoms (3) at the ends thereof, a hood (4) that is arranged at both ends of the reactor (1), and one or several deflecting metal sheets (6) which are disposed perpendicular to the longitudinal direction of the reactor in the intermediate space (5) between the contact tubes (2) and alternately release opposite passages (7) located on the inner wall of the reactor (1). The contact tubes (2) are filled with the fixed-bed catalyst, the hydrogen chloride and the gas flow containing molecular oxygen are directed from one end of the reactor through the contact tubes (2) via a hood (4) and are withdrawn from the opposite end of the reactor via the second hood (4), and a liquid heat-exchanging substance is directed through the intermediate space (5) around the contact tubes (2).
摘要:
The invention relates to a method for producing chlorine by means of catalytic gas phase oxidation. Said method comprises the following steps: a) a feed gas stream I containing hydrogen chloride and a feed gas stream II containing oxygen are provided; b) feed gas stream I, feed gas stream II, an optional back flow Ia containing hydrogen chloride, and an optional back flow IIa containing oxygen are fed into a first oxidation zone and are contacted with a first oxidation catalyst in a first oxidation stage in which a first partial quantity of the hydrogen chloride oxidizes into chlorine while a gas stream III is obtained that contains chlorine, unreacted oxygen, unreacted hydrogen chloride, and steam; c) gas stream III is fed into a second oxidation zone and is contacted with at least one additional oxidation catalyst in a second oxidation stage in which a second partial quantity of the hydrogen chloride oxidizes into chlorine while a product gas stream IV is obtained that contains chlorine, unreacted oxygen, unreacted hydrogen chloride, and steam; d) chlorine, optionally back flow Ia, and optionally back flow IIa are recovered from product gas stream IV. The inventive method is characterized in that the first oxidation catalyst used in the first oxidation zone is provided in a fluidized bed while the additional oxidation catalyst/s used in the second oxidation zone is/are provided in a fixed bed.