Eszakmagyarorszagi Vegyimuvek

Lajos Meszaros

Ferenc Mogyorodi

Laszlo Rozsa

Laszlo Tasi

Zoltan Salamon

Lajos Lako

Istvan Szatmari

Jozsef Grega

Laszlo Marko

Apparatus for solvent extraction of a mother liquor with a solvent that is immiscible with and has a different specific gravity than the mother liquor, is disclosed. Means are provided for introducing into an extraction chamber, the solvent, the mother liquor and a carrier gas. Such means simultaneously serve to atomize the solvent and the mother liquor and disperse same in the carrier gas whereby upon introduction a cloud phase is produced in the chamber. The introducing and simultaneously atomizing is carried out through one and the same spray nozzle. Condensation means are arranged in the extraction chamber and function to terminate the cloud phase and produce a condensed extracted mother liquor phase and a condensed solvent phase containing the substance to be extracted. Means are provided for separating the condensed extracted mother liquor phase from the condensed solvent phase on the basis of the different specific gravities of same.

Solvent extraction apparatus

Transport processes such as emulsification, mass transfer, dissolution, washing or chemical reaction are carried out by admixing two substantially immiscible fluid phases with a rotary agitator having thereon filamentary elements that occupy 0.1% to 20% of the space to be swept thereby, whose thickness is 10-5000 .mu.m and whose thickness-to-length ratio is 1:5 to 1:5000, there being several thousand such elements on the rotor, that rotates at several thousand rpm, the elements having peripheral speed of at least 30 m/s.-- The operation is improved by also including in the fluid medium solid particles of a size 1-1000 .mu.m.

Intensification of fluid-fluid transport processes

Various chloroformates are produced from aliphatic, substituted aliphatic, cycloaliphatic, aromatic and arylaliphatic alcohols having up to 20 carbon atoms and of phosgene in a continuous, concurrent flow process, with the alcohol starting material being atomized into the reactor, whereby the reaction takes place largely in the fog phase. The vapor pressure of the phosgene can be utilized for the creation of the fog phase and the termination of the atomized state can be used for efficiently separating the chloroformate end product from the hydrogen chloride by product. The process can be carried out in a reactor comprising a reaction zone, a charged zone and a zone for the recovery of the end product.

Method for producing chloroformates

Process for the solvent extraction of liquids mutually immiscible with each other and having different specific gravity, in which both the mother liquor and the solvent(s) are dispersed in a gas or vapour, thereafter the disperse state of the system is terminated by condensation, and the immiscible phases are separated from each other.

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Szeged, Hungary

Lajos Meszaros