Process for reductive deposition on a metal surface
OwnerFriederich Bolsinginventor
Life of this patent
Estimating the term…
Abstract
The invention is directed toward a process for reductively depositing inorganic and/or organic compounds on the surface of a reducing metal. During the process, toxic and carcinogenic compounds become immobilized on a reducing metal and have their chemical hazard potential significantly decreased. The compounds' immobilization results from complex formation between the compounds with the reducing metal. The reduction of the immobilized compound may then be completed by contacting the compound-metal complexes with a hydrogen source.
Claims30
A process for the reductive deposition of a reducible compound as such or as a constituent part of a mix or solution with a reducing metal characterized in that the reducible compound is continuously being reductively fixed on a continuously mechanically in situ recovered clean surface of a finely dispersed reducing metal at ambient temperatures.
A process according to one of the preceding claims, wherein the subsequent reaction of the complex of a reducing metal with the reducible organic compound is carried out inside the mixing or grinding device, in which the chemical fixation of the reducible organic compound has taken place beforehand, or in a separate in-line mixing or grinding device.
A process according to one of the preceding claims, wherein solids containing the reducible compound are ground with the reducing metal in the presence of a grinding aid.
A process according to one of the preceding claims, wherein solids containing the reducible organic compound are ground with the reducing metal in the presence of an inert organic solvent.
A process according to one of the preceding claims, wherein solids, which contain the reducible organic compound incorporated, are pre-treated in an intensive mixing or grinding device in order to increase the accessibility of the reducible organic compounds through decreasing the particle size of solid particles.
A process according to one of the preceding claims, wherein the inorganic compound is a salt or complex of a heavy metal.
A process according to one of the preceding claims, wherein heavy metal ions, as contaminants in a liquid phase, are transferred into their insoluble metallic state through reductive fixation on a continuously mechanically in situ recovered clean surface of the reducing metal and are thus completely removed from said liquid phase through intensive mixing by means of a high-speed dispersing tool in the presence of an electron transfer accelerator.
A process according to one of the preceding claims, wherein heavy metal ions as contaminants in solids are transferred into their insoluble metallic state through reductive fixation on a continuously mechanically in situ recovered clean surface of the reducing metal and thus completely immobilized in said solids by intensive mixing, grinding, milling in the presence of an electron transfer accelerator.
A process for the detoxification and immobilization of reducible organic and inorganic hazardous compounds as contaminants in industrial waste, residues, by-products as well as in contaminated soil and soil-like materials, sludge, mineral oil and mineral oil-like materials characterized in that said contaminated materials are subjected to a process according to one of the preceding claims without pretreatment or after having been worked up in a dispersed chemical reaction and applying, if necessary, an additional thermal and/or chemical drying process.
Dependencies are inferred from the claim text.