6results about How to "Reduce solid waste discharge" patented technology

The invention provides a preparation method of white tea enzyme liquid, and belongs to the technical field of food biology.The method comprises the following steps of raw material pretreatment, preparation of dry white tea and purified water, preparation of Chinese patent medicine compound distiller's yeast, liquid fermentation of the compound distiller's yeast, distillation and separation of tea liquor, and refining and sterilization of the white tea enzyme liquid. According to the invention, 24 Chinese patent medicines with homology of medicine and food are blended into the distiller's yeast for preparation, so that the enzyme liquid has the composite health-care functions of oxidation resistance (tea polyphenol), bioflavonoids and the like of white tea at the same time, and the core pain point of single effect of the existing product is solved.

This utility model relates to a catalyst recovery device for dimethyl carbonate (DMC) preparation, belonging to the field of DMC preparation technology. It includes a recovery chamber with a mounting ring fixedly connected to its bottom surface. A clearance groove is formed on the back of the mounting ring. Inside the recovery chamber is a recovery assembly for catalyst recovery. The recovery assembly includes a partition plate fixedly connected inside the recovery chamber. A connecting chamber is placed on top of the partition plate. The inner top wall of the connecting chamber is rotatably connected via a bearing to an inlet pipe that extends through the connecting chamber and to the top of the recovery chamber. This catalyst recovery device for DMC preparation facilitates catalyst separation through a ceramic membrane. The rotation of the connecting chamber improves the separation effect. The separated catalyst is conveniently heated through a heating pipe and a connecting rod, resulting in high recovery efficiency, reduced production costs, and reduced solid waste emissions.

The invention provides a foundation pit integrated supporting system based on an in-situ curing process. The foundation pit integrated supporting system comprises an active area curing supporting body arranged outside a foundation pit design excavation contour line and a passive area curing soil body located on the inner side of an active area. The active area solidified support body and the passive area solidified soil body are synchronously formed through an in-situ solidification process to form an integrated support structure; the active area solidified support body comprises an active area solidified soil body and a vertical reinforcing body; at least a through hole is formed in the surface, in contact with the passive area solidified soil body, of the recoverable reinforcing body, and the passive area solidified soil body enters the through hole when being extruded and is in cross strong key connection with the active area solidified soil body; and by utilizing the characteristic of high in-situ curing strength improvement speed, the construction period is shortened by more than 40%, and the method is particularly suitable for foundation pit engineering with short construction period.

The present application belongs to the technical field of artificial stone, and particularly relates to an environment-friendly zero-silica stone based on bio-based resin and a preparation method thereof.The environment-friendly zero-silica stone according to the present application contains, by weight percentage, 63-70% of zero-silica stone recycling material, 20-25% of amorphous silicon dioxide powder, and 8-12% of resin, wherein the resin is composed of unsaturated polyester resin and bio-based resin, and the amount of the bio-based resin is 10-30% of the total weight of the resin.The environment-friendly zero-silica stone uses zero-silica stone recycling material and amorphous silicon dioxide powder as main aggregate fillers, and uses unsaturated polyester resin and bio-based resin as a combined adhesive matrix, so that the curing performance, mechanical strength and economy are considered, and the obtained product has high compactness, stable physicochemical properties, and is green and environment-friendly.

The invention discloses a modified epoxy curing agent based on KH-560 distillation residues as well as a preparation method and application of the modified epoxy curing agent. The preparation method comprises the following steps: A, putting a polyamine compound into a stirring kettle, and stirring; b, putting an accelerant into a stirring kettle, stirring the accelerant and the polyamine compound to obtain a mixed solution, uniformly mixing, introducing nitrogen into the stirring kettle, and replacing air in the kettle; c, the KH-560 distillation residues are put into a storage tank, nitrogen is introduced into the storage tank, and air in the storage tank is replaced; d, heating the mixed solution in the stirring kettle to a reaction temperature, and metering and dropwise adding the KH-560 distillation residue into the stirring kettle according to a theoretical equivalent to react; e, after dropwise adding is completed, liquid in the stirring kettle is subjected to heat preservation and continuous stirring at the reaction temperature, and the modified epoxy curing agent is obtained after discharging. According to the scheme, the KH-560 distillation residue can be safely and efficiently converted into the modified epoxy curing agent, the epoxy value in the KH-560 distillation residue is recycled, and meanwhile, the environment-friendly treatment cost is reduced.

The application provides a method for synthesizing dextroketoprofen. The method comprises the following steps: S1: taking ketoprofen amide as a raw material, performing a hydrolysis reaction in a reaction medium, a cosolvent, a phase transfer catalyst and an amidase system, and performing separation and purification to obtain dextroketoprofen and levo-ketoprofen amide; S2: performing a chemical racemization reaction on the levo-ketoprofen amide in the presence of a solvent and a base to obtain ketoprofen amide; and repeating step S1 by taking the ketoprofen amide as a raw material. The method has high substrate concentration, low enzyme substrate ratio, high selectivity, high conversion rate and high product purity, higher efficiency, low solvent consumption, lower cost, fully utilized raw materials, less solid waste discharge, can meet the requirements of industrialized production of enzyme catalysis, and has good industrial application potential.