摘要:
Supports having a catalytic coating comprising at least one porous and cavity-containing catalyst layer are described, cavities being irregular spaces having dimensions greater than 5 μm in at least two dimensions or having cross-sectional areas of at least 10 μm2. The catalytic coatings are distinguished by a high adhesive strength and can preferably be used in microreactors.
摘要:
The present invention relates to a system, a reactor and a process for the continuous industrial conduct of a reaction where a b-unsaturated aliphatic polyether compound A is reacted with an HSi compound B in the presence of a catalyst C and optionally of other auxiliaries, and the system is at least based on the system (3) for combining the starting materials for components A (1) and B (2), on at least one multielement reactor (5) which in turn comprises at least two reactor units in the form of exchangeable pre-reactors (5.1) and comprises at least one further reactor unit (5.3) downstream of the pre-reactors, and on a product-work-up system (8).
摘要:
The present invention discloses a microreactor for performing heterogeneous catalytic reactions, being of plate or stack construction for industrial use, with provision made for chambers between the plates for the chemical reaction and for the heat removal. Inside the reaction chambers, catalyst material is applied to the internal walls or filled into recesses, and in all chambers there are spacers. In particular the slot-shaped reaction chambers have channels with a hydraulic diameter smaller than 1500 μm and a ratio of free slot width to free slot height in the range of 10 to 450.
摘要:
A process for the production of 2,3,5-trimethylhydroquinone diesters by aromatization of 2,6,6-trimethyl-2-cyclohexene-1,4-dione (4-oxoisophorone, ketoisophorone, KIP) with an acylating agent and an acidic soluble or insoluble catalyst, which process may be operated alternatively continuously or discontinuously. The process includes the following steps: a) a carboxylic anhydride having a C1 to C4 alkyl residue is used as the acylating agent, b) after the reaction, a proportion of the resultant carboxylic acid is optionally removed by distillation, c) the reaction solution is cooled, d) the product which has crystallized out is separated and washed, and e) the filtrate is returned to step a).
摘要:
The present invention relates to an integrated plant which comprises a plant for the electrothermic production of hydrogen cyanide and a plant for electricity generation, the plant for the electrothermic production of hydrogen cyanide being connected to the plant for electricity generation via a conduit and electricity being generated in the plant for electricity generation from a product gas obtained in the plant for the electrothermic production of hydrogen cyanide. This integrated plant affords flexible use of electricity by a method in which, at times of a high electricity supply, the plant for the electrothermic production of hydrogen cyanide is operated and at least some of the hydrogen and/or gaseous hydrocarbons obtained in addition to hydrogen cyanide is stored and, at times of a low electricity supply, stored hydrogen and/or gaseous hydrocarbons are fed to the plant for electricity generation.
摘要:
The present invention relates to a component for producing vacuum insulation systems, comprising at least one insulation layer which is surrounded by a casing, wherein the gas pressure in the insulation layer can be reduced by means provided in the component, wherein the means for reducing the gas pressure is embodified as activatable. The present invention further describes a vacuum insulation system comprising a component according to the invention.
摘要:
The present invention relates to a fibre assembly comprising high-performance polymeric fibres and bonding fibres, the fibre assembly comprising at least 70% by weight of high-performance polymeric fibres and at most 30% by weight of bonding fibres, the fibre assembly having a layered arrangement of the fibres and at least some of the fibres being bonded together by points of contact obtainable by softening of the bonding fibres. The present invention further describes an insulation system comprising a fibre assembly of the invention.
摘要:
The invention relates to a synthesis reactor and to a method for producing vinyl acetate, in which gaseous ethylene and acetic acid, in addition to oxygen or gases containing oxygen, react catalytically. The inventive synthesis reactor is a wall reactor, in which the catalytic synthesis takes place in a plurality of reaction chambers, whose free flow cross sections measure less than 2000 μm, preferably 1000 μm and whose indirectly cooled walls are coated with a palladium-gold catalyst.
摘要:
There are described thermoelectric elements that are manufactured by using a porous matrix or a porous substrate. The matrix consists of an electrically insulating material having sufficient thermal and chemical resistance as well as the lowest possible thermal conductivity, and is provided in predetermined regions with different thermoelectric materials, so that continuous conductors are formed in the matrix. These are electrically connected to one another to form thermocouples, which in turn are electrically interconnected with one another to form the thermoelectric element.
摘要:
A modular construction micro-reactor with parallel microchannels on fluid guide plates for chemical reactions, but not for evaporation purposes is known. A modular construction falling film evaporator is disclosed, comprising a stack of alternate gap-like evaporation chambers and sheet-like evaporator modules with an assembly of parallel microchannels, whereby the evaporation chambers are open above and/or below across the whole width of the module and the stack is arranged in a container. The falling film evaporator is used in a method for obtaining a gaseous phase from a liquid medium on a technical scale and is suitable for the concentration of thermolabile solutions and rapidly adjustable production of a gas stream.