Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 7285216 | Treatment of water A process for treating sulphide-containing water includes maintaining a steep redox potential gradient in an interface zone of the sulphide-containing water. The water is exposed to an oxygen-containing environment, and the interface zone is located immediately belo... | 10/23/2007 |
| 6315904 | Process for treating sulphate-containing waste water A process for treating sulphate-containing waste water comprises introducing a feedstock comprising sulphate-containing waste water, into a pond. The sulphate-containing waste water is subjected to biological sulphate reduction in the pond, thereby to con... | 11/13/2001 |
| 6228263 | Treatment of sulphate- and metal-containing water A process for treating sulphate- and metal-containing waste water, includes subjecting, in a reaction stage, the sulphate- and metal-containing waste water to biological sulphate reduction in which sulphates in the waste water are converted to sulphides, ... | 05/08/2001 |
| 6203700 | Process for treating metal-containing acid water A process for treating metal-containing acid water comprises adding an alkaline aqueous component to metal-containing acid water, thereby to raise the pH of the acid water and to cause metals therein to precipitate. The precipitated metals are separated f... | 03/20/2001 |
| 6197196 | Treatment of water A process for treating sulphate- and metal-containing waste water comprises adding a sulphide compound to the waste water. The sulphide compound reacts with a metal in the waste water to form a corresponding metal sulphide, which precipitates from the was... | 03/06/2001 |
| 6110370 | Treatment of water A process for treating acid water process comprises raising the alkalinity of an aqueous component by means of algae, and separating algae from the aqueous component, thereby to obtain a purified alkaline aqueous component. The purified alkaline aqueous c... | 08/29/2000 |
| 5925258 | Upright tubular filter unit and method of separation using the filter unit A method of separating particulate material suspended in a liquid from that liquid is described. The method includes the steps of: providing at least one upright tubular filter unit having a top end and a lower end; introducing a flow of the suspension in... | 07/20/1999 |
| 5357865 | Method of cloud seeding A method of cloud seeding for precipitation enhancement comprises releasing hygroscopic seeding particles from a seeding flare 10. The particles are obtained by burning, in the flare, a pyrotechnic composition which includes, as an oxidizing agent, a comp... | 10/25/1994 |
