Von Roll Ag

Biomarine Handelsgesellschaft Ag.

Alpha Patent Limited

Robert J Hafeli

There is provided a process for the production of pure, concentrated urokinase starting from a crude urokinase solution. The crude urokinase solution is contacted in a medium having a pH of .gtoreq.6 with a porous solid matrix having a high specific surface area on whose surface there is immobilized aprotinin. Subsequently the urokinase adsorbed in this manner is eluted in an elution agent having a pH.ltoreq.4.5. There are obtained highly concentrated and very pure solutions of urokinase. The urokinase is used in medicine as a pharmaceutical for the dissolving of fibrinous clots and coagulums.

Process for the production of urokinase in pure condition

There is prepared an anti-foulant paint comprising a matrix of a synthetic resin containing (1) at least one metal toxicant, and (2) at least one of the following compounds: (I) a salt of a mono- or diaminoacridine of the formula I ##STR1## wherein R.sup.1 is hydrogen, amino, methyl, ethyl, methoxy, chloro, nitro, or phenyl,

Anti-fouling compositions

A process for conditioning flue gases in waste material incineration plants with heat utilization. Secondary air is introduced into the combustion chamber above the combustion grate. The flue gases are moistened prior to entering the gas cleaner by water sprayed therein. Apparatus for performing the process is also disclosed.

Process for conditioning flue gases in waste material incineration

To dispose of high-polymer, chlorine-containing plastics, such as PVC, without liberating hydrochloric acid in the atmosphere, the material is placed in a closed vessel and contacted with super-heated steam to split off gaseous hydrochloric acid; the resulting mixture of water vapor, steam and hydrochloric acid is removed, cooled and condensed, so that hydrochloric acid can be derived therefrom; the residue of the material after the hydrochloric acid has been removed can then be safely incinerated with other refuse, etc.

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Zurich, Switzerland

Robert J Hafeli