摘要:
Provided is a novel extractant for palladium capable of improving an extraction rate compared to the conventional extractant, DHS, and also capable of back-extracting palladium using an ammonia solution, and a method of separating and recovering palladium using the novel extractant. The present invention provides a method for obtaining an aqueous solution containing palladium only by: bringing an acidic aqueous solution containing at least palladium into contact with an organic solution containing a sulfide-containing monoamide as an active integredient represented by the following structural formula (I), where R1, R2, and R3 each represent a group selected from a chain hydrocarbon group having 1 to 18 carbon atoms which may be branched, an alicyclic hydrocarbon group having 1 to 10 carbon atoms, and an aromatic hydrocarbon group having 1 to 14 carbon atoms, and n represents an integer of 1 to 4; extracting palladium into the organic solution; and conducting the back-extraction of the palladium extracted in the organic solution to an aqueous solution using an ammonia solution,
摘要:
A phosphorus-containing hydroquinone derivative represented by a general formula (1): (where R1 and R2 represent linear or branched alkyl groups that are identical or may be different, and/or R1 and R2 may form a circular group; X represents an oxygen atom or sulfur atom; Y and Z represent hydrogen atom, hydroxy group, linear or branched alkyl group, aralkyl group, alkoxy group, allyl group, aryl group or cyano group, and/or Y and Z may form a circular group). The present invention provides phosphorus-containing hydroquinone derivatives that are useful for intermediate materials for reactive type flame-retardant agents or phosphorus-containing epoxy resins.
摘要:
A switch of high reliability in which built-in components are not detached even when a shock is applied to the switch. A microswitch 4 is actuated by an operative plunger 2, and LEDs 14 are mounted on the same circuit board 5. The switch is configured so that light from the LEDs 14 is diffused and guided to an operation face 10a on the upper side by the operative plunger 2. A metal plate 12 is attached into the internal space of the operative plunger 2. According to this configuration, inward bending of the operative plunger 2 due to a shock or the like is prevented from occurring, and engagement between engaging holes 3b of a case 3 and engaging protrusions 2a of the operative plunger 2 is prevented from being cancelled.