Sulfonamidophenols, metal complexes thereof, and solutions containing
申请人:Henkel Corporation
公开号:US04239699A1
公开(公告)日:1980-12-16
Certain sulfonamidophenols, metal complexes thereof and solutions of said compounds in essentially water-immiscible, liquid hydrocarbon solvents are disclosed. The sulfonamidophenols have the structural formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are as defined in the specification and claims hereof. Particular metal values are recovered from their aqueous solutions by using sulfonamidophenols dissolved in essentially water-immiscible liquid hydrocarbon solvents. The extraction process involves contacting the metal value containing aqueous solution with the solution of sulfonamidophenol in essentially water-immiscible liquid hydrocarbon solvent and stripping the metal values from the loaded organic phase.
Certain benzoxazoles and the use thereof as metal extractants
申请人:General Mills Chemicals, Inc.
公开号:US04020081A1
公开(公告)日:1977-04-26
Benzoxazoles having the structure ##STR1## where R is hydrogen or an alkyl group having from 1 to 20 carbon atoms, R' is hydrogen, chlorine or an alkyl group containing from 1 to 20 carbon atoms, X is H or Chlorine and the total number of carbon atoms in R and R' is 6 to 40 with the proviso that one of R and R' must be an alkyl group of at least 6 carbon atoms. The benzoxazoles are useful in a process of recovering metal values, particularly copper and nickel, from aqueous solutions thereof.
Alkyl-substituted 2,2'-(1,4-naphthalenediyl)dibenzoxazole and
申请人:Mitsubishi Paper Mills Limited
公开号:US05213888A1
公开(公告)日:1993-05-25
A resin coated sheet type photographic support which is made up of a support, which is coated on both sides with a polyolefin resin. On the image forming side, the resin contains a titanium dioxide pigment and a fluorescent agent of an alkyl-substituted 2,2'-(1,4-naphthalenediyl)-dibenzoxazole represented by the structural formula [I]: ##STR1## wherein R' and R" are independently alkyl groups having 9-20 carbon atoms, m and n are independently 0 or positive integers and m+n=1-4. The photographic support has bright whiteness and does not cause color change or bleeding out.
Process for reacting isocyanates in the presence of quaternary ammonium
申请人:The Dow Chemical Company
公开号:US04335219A1
公开(公告)日:1982-06-15
The reaction of an isocyanate such as toluene diisocyanate with itself to form an isocyanurate or with an active hydrogen compound such as diethylene glycol to form a urethane is catalyzed by the presence of an ar-ammonium areneoxide such as 4-dodecyl-2-trimethylammonium phenoxide.