4results about How to "Efficient separation and recovery" patented technology

The application provides a method and system for recovering fluorosilicic acid wastewater based on oligomerization-induced separation. The recovery method comprises the following steps: step 1): a first crystallization reaction is performed on a first system comprising fluorosilicic acid wastewater and calcium salt, wherein the Ca:Si molar ratio of the first system is greater than or equal to 3, the reaction time is 10-30 min, the reaction is allowed to proceed for 30-60 min after the reaction is completed, and then solid-liquid separation treatment is performed to obtain primary calcium fluoride sludge and a first supernatant; step 2): the primary calcium fluoride sludge is subjected to desiliconization cleaning treatment using a desiliconization lye to obtain a first calcium fluoride product and an alkaline recovery liquid; wherein the pH value during the desiliconization cleaning treatment is 12.5-13.5. The recovery method can efficiently recover fluorine and silicon from fluorosilicic acid wastewater, and achieves the effect of recycling fluorosilicic acid wastewater.

This utility model discloses an oil-water separation device for a waste oil sludge recycling production line, comprising a base plate, with support columns fixedly connected to all four sides of the top of the base plate, a top plate fixedly connected to the top of the support columns, an oil-water separator fixedly connected to the bottom of the top plate, a motor fixedly mounted to the middle of the top of the top plate by bolts, a gear fixedly connected to the output end of the motor, a toothed plate meshing with the surface of the gear, a movable plate fixedly connected to the outer side of the toothed plate, and a first pulley drivingly connected to the top of the gear. This utility model forms a circulating heating separation system through the oil-water separator at the bottom of the top plate and a constant temperature chamber. The motor drives the spiral stirring blades and stirring rod to perform double stirring of the waste oil sludge, accelerating the oil-water separation in the sludge; the constant temperature chamber maintains the temperature required for separation, reducing oil viscosity and improving separation efficiency, enabling efficient separation and recovery of oil and water in the waste oil sludge.

The present application relates to the technical field of high molecular dyes, in particular to a recyclable blue chromophoric monomer, a preparation method thereof, a blue polyester, a preparation method and recycling method thereof, and a recycling method of the recycled coloring monomer. The blue chromophoric monomer comprises a 1,4-diarylamino anthraquinone chromophore and at least one hydroxyalkyl segment, the 1,4-diarylamino anthraquinone chromophore and the at least one hydroxyalkyl segment are bonded through a heteroatom, and the hydroxyalkyl segment can react with a polyester-forming monomer. The blue polyester formed by the blue chromophoric monomer has uniform color and excellent color fastness, and can be subjected to alkaline alcoholysis to obtain a blue chromophoric monomer with high purity and a polyester-forming polyacid, thereby realizing simultaneous closed-loop recycling of the polyester monomer and the colorant. The industry problem that the traditional colored polyester colorant is difficult to recycle at high value is fundamentally solved, and key technical support is provided for the circular economy development of textile materials.

This utility model discloses a purification and recycling device for Kathon production waste, relating to the field of Kathon production technology. The waste tank is connected to a plate and frame filter press, which is connected to a first distillation tank. The first distillation tank is connected to a salting-out tank, the inlet of which is connected to an ethanol tank. The outlet of the salting-out tank is connected to a filter, the filter to a second distillation tank, the second distillation tank to an extraction tank, the inlet of which is connected to an ethyl acetate tank, the extraction tank to an organic phase storage tank, the organic phase storage tank to a third distillation tank, and the third distillation tank to a CIT / MIT byproduct recovery tank. All devices are closely connected, and materials flow orderly within the system, avoiding the cumbersome material transfer and losses of traditional processing methods. This significantly improves waste treatment efficiency, greatly increases resource recycling rate, is environmentally friendly, and reduces production costs.