Abstract:
A copper plating solution and a method for preparing a copper plating solution are provided. The copper plating solution comprises: a copper salt, a complexing agent, a stabilizer, a reducing agent, a surfactant, a hydroxyl-terminated polyoxypropylene ether, and a sodium trisulfide-isothiourea-propane sulfonate.
Abstract:
A lithium adsorbent is provided, which includes an adsorbent material, a binder, and a wetting and dispersing agent. The binder includes at least one of a vinylidene fluoride-chlorotrifluoroethylene copolymer and a fluoroolefin-vinyl ether copolymer; and the wetting and dispersing agent includes one or more of polyethylene glycol, sodium polyacrylate, polyvinyl alcohol, and a formaldehyde condensate. A method for preparing the lithium adsorbent and a method for extracting lithium from salt lake using the lithium adsorbent are further provided.
Abstract:
A method for extracting lithium from salt lake includes the following steps. The salt lake brine is flowed through a lithium adsorbent at a varying rate, to allow the lithium ions in the salt lake brine to be adsorbed on the lithium adsorbent, to obtain a lithium-rich adsorbent. During the adsorption process, the flow rate of the salt lake brine gradually decreases, and the difference between the initial flow rate and the final flow rate of the salt lake brine is 0.5-3BV/h. The lithium-rich adsorbent is washed. The lithium ions are desorbed from the washed lithium-rich adsorbent with a lithium ion eluent, to obtain a desorption solution.
Abstract:
The present disclosure discloses a colloidal palladium activator composition comprising colloidal palladium particles, sodium chloride, glyoxylic acid, hydrochloride solution, stannous chloride; and a stabilizer. The glyoxylic acid has strong reductive ability, which prevents the oxidation of palladium 2+ in the activator to prolong the life of the activator. At the same time, the glyoxylic acid distributes around the colloidal palladium particles which may separate the colloidal palladium particles more evenly and prevent the colloidal palladium particles from coagulation, further strengthening the activity of the activator. The present disclosure also discloses a method for preparing the colloidal palladium activator composition. During the activation process according to an embodiment of the present disclosure, glyoxylic acid may absorb on the surface of the nonmetal substrate at first to strengthen the bonding force between the glyoxylic acid and the nonmetal substrate, which may favor the evenness and flatness of the coating layer, and further enhanced the adhesive strength between the plating layer and the substrate. Also, an activating method using a colloidal palladium activator composition for nonmetal surfaces is disclosed.
Abstract:
A lithium extraction apparatus and a lithium extraction method are provided. The lithium extraction apparatus includes a frame (2) and a transmission mesh belt (1). The transmission mesh belt (1) is installed on the frame (2), the transmission mesh belt (1) has water permeable holes, and the transmission mesh belt (1) is configured to carry an adsorbent. The frame (2) is sequentially provided with an adsorption zone (21) and a desorption zone (22) along a traveling direction of the transmission mesh belt (1). A brine spraying device (211) is arranged above the transmission mesh belt (1) in the adsorption zone (21). A desorbing liquid spraying device (221) is arranged above the transmission mesh belt (1) in the desorption zone (22). A lithium extract collecting device (222) is arranged below the transmission mesh belt (1) in the desorption zone (22). The transmission mesh belt (1) in the adsorption zone (21) is folded into a multi-layer structure in the vertical direction; and/or the transmission mesh belt (1) in the desorption zone (22) is folded into a multi-layer structure in the vertical direction.
Abstract:
A copper plating solution and a method for preparing a copper plating solution are provided. The copper plating solution comprises: a copper salt, a complexing agent, a stabilizer, a reducing agent, a surfactant, a hydroxyl-terminated polyoxypropylene ether, and a sodium trisulfide-isothiourea-propane sulfonate.