摘要:
The invention relates to a method for carrying out polymerisation processes, wherein a (co-)polymerisation of monomer(s) takes place in a first stage and a separation of product and monomers, oligomers, reaction products and additives or solvents takes place in a second stage. Before and/or in the second stage, which is to say during finishing, a substance is to be added to the reaction mixture, by which substance stripping and/or influencing of the temperature is effected, whereby the reaction equilibrium is shifted toward the polymers, wherein the speed of reaction to the monomer is slowed. A second possibility is that before and/or in the second stage, which is to say during finishing, a substance is added to the reaction mixture, by which substance stopping and, as a second function stripping, and/or influencing of the temperature is effected.
摘要:
The invention relates to a method for the production of halobutyl rubber by copolymerization of isobutyl and isoprene in a solvent to form butyl rubber, wherein the solvent can be non-soluble for a suspension process (for example chloromethane) or be soluble for a solution process (for example, isopentane, pentane, hexane), and the subsequent halogenation of the butyl rubber. According to the invention, at least the halogenation should be carried out using a halogenation agent (8), in particular chlorine or bromine, in a halogenation kneader (7).
摘要:
In a method for the thermal separation of a volatile substance from a non- or less volatile substrate having a phase boundary towards a gas chamber that receives the volatile substance subsequent to vaporisation and/or sublimation, mechanical energy is supplied to the phase boundary between the substrate and the gas chamber to increase the material exchange of the volatile substance. In the process, the material exchange is increased by the addition of an additive or mechanical energy to the surface of the phase transition in such manner that said supplied mechanical energy destroys bubbles containing the volatile substrate, so that the volatile substrate can escape to the gas chamber.
摘要:
The invention relates to a method for continuously thermally separating material mixtures, in particular of solutions, suspensions, and emulsions, wherein the continuous processing of the material mixtures is divided into a main vaporization and a degasification, wherein the main vaporization and the degasification each take place in a separate mixing kneader.
摘要:
In a process for continuous acetylation of polysaccharide, a pressure is to be established in a reactor chamber such that a boiling point of a reaction mixture corresponds to a desired reaction temperature and an exothermicity of the reaction is controlled by evaporative cooling.
摘要:
The invention relates to a method for the production of molded bodies from a base substance, wherein the base substance is mixed with a solution for producing a molding solution, and said solution subsequently is at least partially removed from the mixture, and the molding solution is fed to a unit for molding, wherein the molding solution is diluted before molding.