50results about How to "Operational safety and environmental protection" patented technology

The invention discloses a method and equipment for refining high-purity diethyl carbonate, and aims to provide a method and equipment for preparing high-purity diethyl carbonate, which is characterized by single-tower continuous operation, simple separation method, high yield, safe and environment-friendly operation, low energy consumption and use of diethyl carbonate with purity of 99.5 percent as a raw material. The refining method disclosed by the invention comprises three steps: feeding and steam charging operation, light component collection operation, and side withdrawal process regulation and product collection. The rectification column of the refining equipment comprises a built-in regular stainless steel wire gauze corrugated packing and an overhead built-in condenser.

The invention discloses a high-efficiency vibration swing impact nanometer machine system. It includes a gas cylinder, a vacuum feeder, a first vacuum shock nanomachine, a second vacuum shock nanomachine, a vacuum packaging machine, and a vacuum pump. The first vacuum shock nanomachine and the second vacuum nanomachine include a cavity, a vibration swing Machine, four highly elastic springs and a base, the cavity contains impact mesons, the lower part of the vibration swing machine is provided with a rectangular base, and the upper part of the rectangular base is welded to make the cavity and the vibration swing The bracket that is fixed to the machine, the lower parts of the four corners of the rectangular base are respectively fixed to the upper ends of the four high elastic springs, the lower ends of the four high elastic springs are fastened to the base, the first vacuum impact nanomachine and the second Second, the vacuum impact nanometer machine is also equipped with a waterproof cover. The invention belongs to the technical field of microelement nanomachines in the medicine and health care industries, and provides the only highly oxidation-resistant, safe, zero-pollution, high-efficiency vibration swing impact nanomachine system in the country.

The present invention relates to an adsorbent for hemoperfusion and aqueous solution to remove endotoxin and a preparation method thereof. The adsorbent is mainly formed by connecting non-woven fabrics with polyethyleneimine through graft chains in the form of covalent bonds or covalent groups; The preparation method mainly includes the steps of grafting and activating fibers on the surface of the nonwoven fabric and immobilizing polyethyleneimine ligands. The preparation method of the invention is simple, less environmental pollution, and the obtained adsorbent has good endotoxin adsorption performance, blood compatibility and safety.

The invention relates to a waterproof weather balloon and a production method. The weather balloon comprises a balloon matrix and a hydrophobic film coated on a balloon matrix surface. The hydrophobicfilm comprises 8.5-11.5 parts of a hydrophobic main agent, 1-3 parts of a solubilizer, 0.1-0.3 parts of an organic film forming agent and 85.2-90.4 parts of water. The hydrophobic main agent is a compound of one or more of an organosilicon hydrophobic agent and an organic fluorine hydrophobic agent. In the weather balloon, a synthetic material possessing a hydrophobic function is used; and through a necessary operation, a layer of molecular film and even a nanometer film which can achieve a hydrophobic effect are manufactured on a balloon surface. After the balloon is casted and encounters water, beads are formed and are rapidly dispersed and drained so that a problem that the weather balloon which is casted on a rainy day or in humid weather carries out embrittlement acceleration and isblasted in advance due to accumulation of ice on the surface because of surface water absorption so that a service height requirement can not be satisfied is solved.

The invention discloses a sanding method of fast-growing wood. The sanding method comprises the steps: (1) removing stains from the surface of the fast-growing wood, and then applying sanding auxiliaries to the surface of the fast-growing wood; (2) performing sanding treatment to the fast-growing wood with a disc sander, and the model of sanding materials is any one of 100#, 120# and 150#, wherein the substrate of the sanding materials is a fabric abrasive belt; abrasive materials comprise, by weight, 29-36 parts of brown corundum abrasives, 1-3 parts of magnesium borate, 4-7 parts of docosanamide and 1-2 parts of iodooctadecane; the abrasive materials are bonded with the substrate through adhesive. The sanding method of the fast-growing wood, provided by the invention, has the advantages of easy operation, low cost, and safety and environmental protection in the operation process, and the surface of the fast-growing wood sanded is free of burrs, and smooth and flat, so that convenience is provided for subsequent coating operation; and in the sanding process, the fast-growing wood is not broken, and the rate of finished products is high.

The invention belongs to the technical field of microbes, and particularly relates to a method for separating ceratocystis spp from soil. According to the method, a carrot is used for concentrating the ceratocystis spp, the ceratocystis spp is separated and purified by means of selecting a single ascospore group for lining. Due to the fact that part of operations does not require a strict aseptic condition, the method is applicable to bacterial strain collection during field studying and field investigation, and working efficiency is increased; by means of selecting the single ascospore group for lining, a target bacterium is separated and purified, separating and purifying efficiency is increased effectively, and time is saved; the method for separating the ceratocystis spp from the soil is low in cost, wide in utilization range, safe and environmental-friendly.

The invention provides a vitamin A acetate intermediate C15 and a preparation method of vitamin A acetate. The method uses 1-halo-2-methyl-4-acetoxy-2-butene as raw material, and triphenylphosphine or phosphite triester to prepare the corresponding Wittig reagent through substitution reaction, and then react with β-cyclic lemon The aldehyde undergoes Wittig reaction, hydrolyzes the ester group under alkaline conditions, and acidifies to obtain the corresponding halogenated product, and then reacts with triphenylphosphine or phosphite triester again to prepare C15. Vitamin A acetate can be prepared by using the obtained C15 under alkaline conditions and 2-methyl-4-acetoxy-2-butenal through Wittig reaction. The method of the invention has single reaction types, easy operation and realization of reaction conditions, safe and environment-friendly operation, simple post-treatment, and low cost; strong reactivity, high reaction selectivity, high atom economy, and high yield and purity of target products.

The invention relates to an overflow protection cup and a negative pressure regulator. The overflow protection cup comprises a main body, an isolation body, an inner core body, a filter and a floater. The main body comprises an accommodating portion and a clamping portion, a bottom plate of the accommodating portion is provided with a second inlet, and a protrusion block surrounding a lower port is arranged on the upper end face of the bottom plate. The isolation body comprises an isolation portion and a channel convex block arranged along the outer edge of the isolation portion, and a supporting convex block is arranged on the upper end face of the bottom plate of the isolation body. The inner core body comprises a cover plate and a limit tube arranged on the lower end face of the cover plate, a limit column is arranged on the inner side of the limit tube, the limit column protrudes out of the lower end face of the limit tube downward, and the cover plate is provided with a second outlet. The isolation body is arranged in the accommodating portion and located on the protrusion block, the inner core body is arranged in the isolation portion, the cover plate is higher than the upper end face of the isolation body and is covered at the upper end of the accommodating portion in sealing mode, the floater is arranged in the limit tube and located above the limit convex block, and the filter is arranged on the clamping portion in detachable mode. The overflow protection cup is low in use cost and environment-friendly.