摘要:
A method for the partial gas-phase oxidation of C3 and/or C4 precursor compounds to give (meth)acrolein and/or (meth)acrylic acid in the presence of a heterogeneous particulate catalyst in a reactor is disclosed, having several parallelepiped heat-transfer plate modules (1), each comprising two or more rectangular parallel heat-transfer sheets (2), arranged to leave a gap (3) therebetween which may be filled with the heterogeneous particulate catalyst and through which the fluid reaction mixture flows, whereby the heat of reaction is removed by a heat transfer agent, flowing through the heat transfer plates (2), which is thus partly evaporated and a predominantly cylindrical shell (4, 15, 16), completely enclosing the heat transfer plate module and relieving the pressure thereon which has itself a cylindrical sleeve (4) and caps (15, 16) sealing the ends thereof, the longitudinal axis of which is arranged parallel to the plane of the heat-transfer plates (2) and one or more sealing elements (7, 23), arranged such that the fluid reaction mixture only flows through the gaps (3) when not flowing in the reactor inner chamber as defined by the caps (15, 16).
摘要:
Disclosed is a method for producing at least one partial propylene oxidation and/or ammoxidation product, according to which the propylene is produced from raw propane by means of dehydration and is subjected to a heterogeneously catalyzed partial gas phase oxidation and/or partial gas phase ammoxidation in the presence of unreacted propane as a component of a gas mixture 2 having a total C4 hydrocarbon content of = 3 percent by volume.
摘要:
Disclosed is a method for producing at least one final product by partial oxidation and/or ammoxidation of propylene. According to said method, a propane dehydrogenation is used as a propylene source while the propane used therein is obtained by rectifyingly pre-purifying raw propane.
摘要:
The invention relates to a method for the production of at least one partial oxidation and/or ammoxidation product of a hydrocarbon, wherein at least one saturated hydrocarbon (K) that is heterogeneously catalyzed is partially dehydrogenated and the resulting product gas mixture (A) containing the partially dehydrogenated hydrocarbon is used as such or in modified form for the heterogeneously catalyzed, partial oxidation and/or ammoxidation of the partially dehydrogenated hydrocarbon contained in the product gas mixture (A), wherein at least one mechanical separation operation is conducted between the product gas mixture (A) and the heterogeneously catalyzed, partial oxidation and/or ammoxidation.
摘要:
The invention relates to a method for producing acrylic acid by means of two-stage heterogeneously catalyzed partial gas phase oxidation of propylene. According to said method, previously dehydrogenated propane is used as a propylene source while the first partial oxidation stage is operated so as to limit propylene reaction. Furthermore, unreacted propane and propylene contained in the product gas mixture of the second partial oxidation stage are largely redirected into the propane dehydrogenation process taking place upstream.
摘要:
Acrolein and acrylic acid are produced from propane and propene by absorption/desorption of propane and propene from a gas mixture followed by oxidation, in which no heterogeneously catalyzed dehydrogenation of propane occurs between the desorption and oxidation stages without addition of oxygen. Acrolein and acrylic acid are produced from propane and propene by: (a) separation of propane and propene from a gas mixture (A) by absorption in an absorption medium; (b) separation of propane and propene from the absorbent to give a mixture (B) containing propane and propene; and (c) using mixture (B) for oxidation to the required product(s). In this process, no catalytic dehydrogenation of propane without the addition of oxygen is carried out between stages (b) and (c).
摘要:
The invention relates to a method for the continuous gas phase oxidation of C3- and C4-precursors to (meth)acrolein and/or (meth)acrylic acid in the presence of a catalyst, in a reactor. Said reactor has a feed element for the reaction mixture at one reactor end and a discharge element for the reaction mixture at the opposite reactor end and is equipped with devices for dissipating the reaction heat inside the reactor. A heat exchanger agent flows through said devices, which are configured in the form of heat exchanger plates.
摘要:
The invention relates to a method for the production of maleic acid anhydride by heterogeneously catalysed gas phase oxidation in a reactor. Said reactor has a reaction mixture inlet at one end of the reactor and a product mixture outlet at the opposite end of the reactor and, within the reactor volume, a device for removal of the heat of reaction, which is arranged in the form of heat exchanger plates, with a heat exchange agent flowing through said plates.
摘要:
Processes comprising: (a) providing a reactant comprising a component selected from the group consisting of o-xylene, naphthalene and mixtures thereof, and a gas comprising oxygen; (b) reacting the reactant and the gas in a reaction system, in the presence of a catalyst, to form phthalic anhydride; wherein the reaction system comprises: (i) at least two reaction zones, each reaction zone cooled with a coolant; and (ii) an intermediate cooling zone disposed between a first of the at least two reaction zones and a second of the at least two reaction zones; and wherein the coolant entering the first of the at least two reaction zones has a temperature which is more than 20° C. higher than a temperature of the coolant entering the second of the at leas two reaction zones.
摘要:
The invention relates to a method for monitoring, controlling and/or regulating the reactions of a fluidic reaction mixture in the presence of a heterogenic particulate catalyst in a reactor, using two or more vertical thermal sheet metal sheets (1), positioned in parallel and separated by a respective gap (2). The gaps (2) contain the heterogenic particulate catalyst and are traversed by the fluidic reaction mixture. The invention is characterised in that the regulation signal is the temperature, which is determined in one or more gaps (2), at two or more measuring points that are distributed over the height of each gap (2).