8505results about "Inorganic/elemental detergent compounding agents" patented technology

A stripping composition and a method of using the stripping composition to remove cured resins such as elastomeric silicone adhesive deposits from ceramic and metal surfaces of electronic modules to provide reworkability options in assembly processes including diagnostic parts, parts replacement and recovery of substrates from test vehicles is provided. The stripping compositions comprise a base preferably an organic base such as a quaternary ammonium hydroxide, a surfactant and a high boiling environmentally and chemically safe solvent such as di- or tri-propylene glycol alkyl ether. In another stripping composition, the base is used in combination with a mixture of N-alkyl pyrrolidone components, preferably an N-alkyl pyrrolidone and a N-cycloalkyl pyrrolidone. The stripping compositions are used to contact an electronic module having a cured resin such as a silicone adhesive residue deposit on the module surface to dissolve, remove or strip the deposit.

A system and process are provided for recovering and/or cleaning residual or waste petroleum products such as sludge accumulated within a storage tank or upon process equipment surfaces, or from inorganic materials such as sand or clay, and the like. The system and process include a negatively charged aqueous-based dispersion fluid, which is contacted with the petroleum product under controlled relatively high pressure and high shear conditions for fluidizing hydrocarbon molecules and for preventing such molecules from adherence to process equipment surfaces, or contaminants such as sand or clay. Additional mechanical separation as by subjecting the mixed petroleum product and dispersion fluid slurry to sonic vibration may also be employed. The thus-fluidized slurry of petroleum products, dispersion fluid, and inorganic materials can be separated by conventional techniques, as by settling and/or flotation, for further individual processing and/or re-use.