37results about How to "High added value" patented technology

The invention concerns a way of synthesize stone using coal powder and its applying in removing nitrogen and phosphorus in the waste water. Get the coal powder as the material, add the material including aluminum, silicon, or fluorine which can saluted in the alkaline solution, after mixing, add metal alkaline solution and synthesize fei stone by water heating reaction, then change shape by metal salt aqua, we get the fei stone after separating solid and liquid. Change the fei stone to the grains and put them in the filtering bed, achieving to remove nitrogen and phosphorus. The invention solves the environment problem, economy the resource of nitrogen and phosphorus in the coal powder, no second pollution.

The invention discloses a method for preparing carbon nano particles and carbon dots by using activated carbon as a precursor. The method is characterized by comprising the following steps: taking theactivated carbon, performing drying, and performing grinding to obtain powder; adding the powdery activated carbon into an oxide aqueous solution, performing stirring at room temperature, performingheating to temperature of 30-130 DEG C, and performing a reaction for 12-48 h; allowing the obtained material to stand, extracting the supernatant part, adding deionized water, performing concentration for 5-10 times, and performing dialysis by using a dialysis membrane with 100-500 D; mixing an aqueous solution containing the carbon nano particles and a compound containing amino or other functional groups by using deionized water as a medium, performing heating, and performing a heat induction reaction to obtain a crude product of carbon nano particles with a modified surface containing an organic passivation layer; and performing post-treatment to obtain the carbon dots. According to the method disclosed by the invention, the prepared carbon nano particles can be used for functional fillers such as conductive materials, nucleating agents, nano carriers and the like, and the prepared carbon dots can be used as a fluorescent marker, a sensing or detecting probe, and a photocatalyst andused in photoelectric conversion devices such as LEDs.

This invention relates to a method for preparing zeolite by using sintered bottom sludge as the raw material. The method comprises: adding Al, Si, Cl or F-containing additives that can be solved in alkaline solution to sintered bottom sludge, and performing traditional hydrothermal method or two-step method to prepare zeolite. The traditional hydrothermal method comprises: adding NaOH or KOH solution into the raw material and the additive, heating in a reaction kettle, and reacting to prepare zeolite. The two-step method comprises: mixing the raw material and the additive with solid NaOH or KOH, melting in a furnace, transferring into a reaction kettle, adding water and heating to prepare zeolite. After adjusted with alkalinity and Si / Al ratio, the waste alkaline solution can be recycled as the alkali source in the traditional method to prepare zeolite. Sintering technique is an effective means to realize harmless treatment of bottom sludge that is pollutive to water bodies. This invention can realize efficient utilization of sintered bottom sludge, and can obtain zeolite with high added value.