3results about How to "High value-added resource utilization" patented technology

The invention discloses a method for producing hydrogen and co-producing alpha-semi-hydrated gypsum from waste gypsum, and belongs to the field of high value-added resource utilization of typical bulk solid waste. The method comprises the following steps: 1) adding water into waste gypsum, stirring and pulping to obtain slurry; 2) continuously producing hydrogen from the slurry through an electrochemical hydrogen production process to obtain hydrogen, and collecting the slurry after hydrogen production is finished; 3) removing impurities from the slurry through a solid-liquid separation process to obtain liquid; and 4) crystallizing the liquid in a crystal transformation directional regulation process, and drying at high temperature after crystallization to obtain the alpha-semi-hydrated gypsum. The method for producing hydrogen and co-producing alpha-semi-hydrated gypsum from waste gypsum is simple in process and low in raw material cost, high-added-value resource utilization of waste gypsum can be achieved, the purity of produced hydrogen is larger than 60%, the purity of co-produced alpha-semi-hydrated gypsum is larger than 98%, the whiteness is larger than 95, and the utilization efficiency of waste gypsum is larger than 80%; the method can effectively solve the problems of high difficulty, high cost, low added value and the like of the existing waste gypsum treatment technology.

This invention discloses a method for preparing and applying environmentally functional materials rich in persistent free radicals. The preparation method includes: mechanically crushing and sieving agricultural waste, washing it with deionized water, and drying it to constant weight; mixing the obtained agricultural waste powder with alkali at a specific mass ratio, adding deionized water, stirring uniformly at room temperature to promote a complete reaction, and then transferring the mixture to a crucible for drying; and pyrolyzing the precursor in a tube furnace under a nitrogen atmosphere to finally obtain biochar material with a high content of persistent free radicals. This invention utilizes a three-step method of "raw material pretreatment - alkali modification - controlled-temperature pyrolysis" to efficiently transform widely available and low-cost agricultural waste into structurally stable and high-performance environmentally functional materials. The process is simple, low-cost, and environmentally friendly, showing good practicality and promising prospects for widespread application.

The application discloses a kind of resource utilization of ceramic glaze of raffinate acid, it is the powder prepared with raffinate acid as main raw material;Each raw material and its weight fraction included are as follows: raffinate acid 16-20 parts, citric acid 5-8 parts, alcohol additive 4-7 parts, water 5-10 parts.The application takes industrial by-product raffinate acid as main raw material, fully recycles and utilizes effective elements in raffinate acid, further combines the regulation and control mechanism based on citric acid and alcohol additive and segmented temperature control process, and can realize high value-added resource utilization of raffinate acid in glaze field, with significant economic and environmental benefits;The obtained ceramic glaze can give consideration to good sintering crystallization effect, gloss and mechanical property, and has wide applicability.