Coal cleaning course. 4. Chemical cleaning.

Chemical Cleaning of Utafiltration Membrane after Treatment of Oily Wastewater

Alternative Technology: Chemical-free, Laser-assisted Cleaning

A chemical and water-free laser-assisted cleaning technology using deep ultraviolet photons in conjunction with a flowing inert gas is introduced. This environment friendly technology can be used in a wide-range of industrial applications.

Wet-Chemical Etching and Cleaning of Silicon

A Introduction Research and manufacturing related to silicon devices, circuits, and systems often relies on the wet-chemical etching of silicon wafers. The dissolution of silicon using liquid solutions is needed for deep etching and micromachining, shaping, and cleaning. Also, wet-chemistries are often used for defect delineation in single crystal silicon materials. In this paper, a review of t...

Effectuality of Cleaning Workers' Training and Cleaning Enterprises' Chemical Health Hazard Risk Profiling

BACKGROUND Goal-oriented communication of risk of hazards is necessary in order to reduce risk of workers' exposure to chemicals. Adequate training of workers and enterprise priority setting are essential elements. Cleaning enterprises have many challenges and the existing paradigms influence the risk levels of these enterprises. METHODS Information on organization and enterprises' prioritiza...

Dry Cleaning

It has been more than a century since dry cleaning had its origin in Paris, France. Since that time, the dry cleaning process, whereby garments are cleaned in a nonaqueous solvent, has witnessed many refinements. Gasoline and carbon tetrachloride have been replaced as dry cleaning fluids by perchloroethylene (perc, and also known as tetrachloroethylene), Stoddard solvent (a petroleum distillate...