299results about How to "Improve environmental safety" patented technology

This disclosure concerns a process and apparatus for reclamation of waste polystyrene-type materials for reuse within the specification ranges of the input polystyrene-type material. The disclosed process and apparatus include dissolution of the waste polystyrene-type materials in a dissolve section utilizing a reusable solvent having a low boiling point and high vaporization rate, removal of solid contaminants in one or more filter sections, devolatilization of the dissolved polystyrene and recovery of the polystyrene-type material in a solid form in a recovery section. Preferably the process and apparatus provide a closed system and include recycling and reuse in the process of the vaporized solvent. The maximum temperature in the recovery section is 190° C. The reusable solvent is preferably environmentally safe and has a low boiling point and high vaporization rate. n-Propyl bromide, or environmentally safe mixtures thereof, including mixtures with isopropyl alcohol, is the preferred reusable solvent.

Methods for producing plasma-treated, functionalized carbon-containing surfaces are provided. The methods include the steps of subjecting a carbon-containing substrate to a plasma to create surface active sites on the surface of the substrate and reacting the surface active sites with stable spacer molecules in the absence of plasma. Biomolecules may be immobilized on the resulting functionalized surfaces. The methods may be used to treat a variety of carbon-containing substrates, including polymeric surfaces, diamond-like carbon films and carbon nanotubes and nanoparticles.

The invention relates to a multifunctional nano composite material in a core-shell structure, specifically relates to a carbon quantum dot magnetic and fluorescent difunctional nano material and a preparation method thereof, and belongs to the field of preparation of materials. The carbon quantum dot magnetic and fluorescent difunctional nano material which takes magnetic particles Fe3O4 as a core, chitosan and polyanionic cellulose as a shell material and carbon quantum dots as a fluorescent material is obtained by a self-assembling method layer by layer. The preparation method comprises the following steps: after synthesizing a magnetic fluid nano Fe3O4, preparing carbon quantum dots; then, preparing Fe3O4@CS/CDs; finally, preparing the carbon quantum dot magnetic and fluorescent difunctional nano material through the self-assembling method layer by layer. The carbon quantum dot magnetic and fluorescent difunctional nano material is good in biocompatibility and stability and adjustable in magnetism and fluorescence intensity.

The invention relates to a catalytic coolant used in a hot aerosol fire extinguishing device and a processing technique of the catalytic coolant. As to the coolant, heat absorption cooling components mainly include manganese carbonate or manganese oxalate, manganese phosphate, potassium manganate, metal carbonate of a family I, a family II and a transition family, basic carbonate, oxalate and the like; a metal oxide or a hydroxide are adopted as a catalyst, an oxidant and a reinforcing filling; stearate, graphite and the like are adopted as a processing aid; composite solution of alkalis silicate and a water soluble polymer is adopted as an adhesive; and film materials such as hydroxymethyl or hydroxyethyl cellulose are adopted as a surface coating agent. The processing technique includes the steps of mould pressing, squeezing, pelletizing, coating and forming. Compared with the prior art, the catalytic coolant not only has high intensity and good cooling effect, but also can reduce secondary damage of an extinguishing agent and eliminate the content of poisonous gases in an extinguishing agent product so as to improve the environmental safety of the extinguishing agent.

The invention discloses a fire-retardant viscose fiber and a preparation method thereof, wherein a silicon and aluminum composite fire retardant is contained in the fire-retardant viscose fiber and the preparation method of the fire-retardant fiber comprises the steps of: obtaining a spinning solution through taking cellulose pulps as a raw material and subjecting to the processing steps of yellowing, dissolving, defoaming and filtering, subjecting the spinning solution to spinning and forming in a coagulating bath, subjecting to post-processing steps of washing and desulfurization, adding right amount of sodium metasilicate and sodium metasilicate solution into a cellulose viscose solution which is dissolved to any process before the spinning and then uniformly mixing. According to the invention, the silicon and aluminum composite fire retardant is utilized to ensure that the fire-retardant effect of the prepared fire-retardant viscose fiber is greatly increased and the high temperature and alkaline resistances of the fire-retardant viscose are greatly increased; and therefore, the fire-retardant viscose fiber can be popularized and applied in high-temperature environments such as the fields of high-temperature filter media, filter materials and the like.

The invention discloses an off-road vehicle wheel free of inflation. The off-road vehicle wheel free of inflation is composed of a flexible rim, elastic spokes and a rigid hub. The off-road vehicle wheel free of inflation is normally installed on an off-road vehicle. When the off-road vehicle runs, the off-road vehicle wheel free of inflation bears the action of a complicated road surface, and the flexible rim and the elastic spokes generate elastic deformation under the action of external force. When the external force is eliminated, the flexible rim and the elastic spokes recover. In this way, the external force is effectively buffered, shock of the vehicle is reduced, and the bearing capacity of the vehicle is improved. Through a polyurethane interlayer of a hexagonal structure similar to a honeycomb, the firmness of the wheel is improved, a load is evenly distributed, and therefore the environmental adaptability and the safety are improved. A rubber layer is provided with rubber wheel thorns, and therefore the traction performance and the adhesion performance of the vehicle are improved. The off-road vehicle wheel free of inflation is simple in structure, convenient to replace, high in applicability and suitable for various complicated road surfaces, air leakage and burst are avoided, the shock of the vehicle can be effectively reduced, the bearing capacity and the buffering capacity of a vehicle body are improved, the environment adaptability and the safety are improved, and the traction performance and the adhesion performance of the vehicle are improved.

The invention discloses an environmentally-friendly cleaning agent, which comprises the following raw materials in part by weight: 1 to 10 parts of organic acid, 50 to 60 parts of vegetable oil, 3 to 16 parts of potassium hydroxide, 2 to 10 parts of coconut oil, 1 to 10 parts of compatibilizer, 1 to 10 parts of glycerin, 1 to 5 parts of phospholipids and 10 to 600 parts of water. The invention stresses on producing a product with economy, good cleaning effect and excellent environmental safety. Compounds such as methylene dichloride, chlorine compound solvents, halogen solvents and chemicals such as arene and the like with destructive performance on an ozone layer are not used; only environmentally-friendly natural components are used; and the environmentally-friendly water-soluble cleaning agent with good cleaning effect is provided. Moreover, in order to maintain the cleaning performance and the rinsing performance of a surfactant, the phospholipids and the coconut oil are used so as to improve the performance of the cleaning agent; and secondary pollution of water is prevented by using the degradable chemicals.

The invention relates to a marker-free gene-deletion attenuated mutant strain derived from an Edwardsiella tarda wild strain, constituting an attenuated live vaccine of the Edwardsiella tarda strain, wherein, chorismate synthase genes aroC of the Edwardsiella tarda strain are deleted; the Edwardsiella tarda strain is particularly an Edwardsiella tarda strain EIB202; and endogenous plasmids of the Edwardsiella tarda strain are further deleted. The invention further provides a preparation for the marker-free gene-deletion attenuated mutant strain derived from the Edwardsiella tarda wild strain, and the related application in preventing mariculture Edwardsiellosis. The marker-free gene-deletion attenuated mutant strain derived from the Edwardsiella tarda wild strain or the related preparation eliminates the potential security risk to the environment and products in most conventional attenuated live vaccines and constitutes a safe, effective and economic vaccine orienting to the mariculture Edwardsiellosis.

The invention discloses a water-based evaporation drying type gravure ink composition applicable to multiple base materials. The water-based evaporation drying type gravure ink composition applicable to multiple base materials comprises the following components in percentage by weight: 20-60% of an ink linking material, 1-30% of a flaky functional material, 0-30% of an alcohol solvent, 0-10% of auxiliaries, 0-0% of a curing agent and the balance of water. The water-based evaporation drying type gravure ink composition applicable to multiple base materials contains no phenyl ketone and no ester solvent, has the characteristics of safety, no toxicity, no harm, noninflammability, non-explosiveness, nearly zero VOC and the like and is beneficial to human health and environmental safety, and defects of water-based ink composition in onboard stability and ink drying property are overcome; and by selecting resin of a specific structure, the problems of the water-based ink composition in the aspects of binding strength on a base material and printing product materialization tolerance are solved, and the ink composition can be applicable to multiple base materials such as paper and plastic.

The invention discloses a special seed dressing agent with effects of increasing the survival rate and invigorating seedlings for sweet corn. The seed dressing agent comprises gamma-aminobutyric acid, matrine, thiamethoxam, sedaxane, carboxin, amino-oligosaccharin, salicylic acid, glycine betaine, choline chloride, fulvic acid, starch grafted potassium acrylate, calcium chloride, a wetting dispersant, an emulsifier, gibberellin and microelement water soluble fertilizer mother liquor. Under normal conditions or adverse conditions of drought, low temperature and the like, the seed dressing agent has an obvious effect of improving the seed vigor and seedling quality of the sweet corn, can be used for effectively increasing the yield of the fresh spike of the sweet corn, also has effects of exterminating underground insects, protecting and invigorating seedlings and preventing and treating main plant diseases and insect pests of the corn, has control efficiency up to 70%-90% for plant diseases and insect pests in a seedling stage, has control efficiency up to 87%-96% for corn head smut, and not only can help farmers to save labor cost and seed cost greatly, but also can increase the yield by 15%-20%, thus having excellent social and economic benefits and application prospects.

The invention discloses a coal measure strata tunnel milling digging and blasting combined construction method which includes: performing milling digging grooving on an upper step arc guide part (1), performing initial supporting after grooving of the upper step arc guiding part (1) is finished to form a stable bearing arch, performing milling digging grooving on two side walls of a lower step on a lower step left side wall part (4) and a lower step right side wall part (3), performing initial supporting, performing core earth drilling, explosive filling and initiating on an upper step core earth part (2) and a lower step core earth part (5), ventilating, deslagging, and repeating the steps until a whole tunnel is dug. The construction method fully expresses the advantages of a mechanical milling digging method and a drilling blasting method, achieves accurate forming of a tunnel outline through mechanical milling and digging, causes small surrounding rock disturbance, is good in back break control effect, good in operation environment and high in construction security, reduces back break, protects surrounding rock, improves self-bearing capacity of the surrounding rock and avoids large deformation and partial collapse.

An intellectual automatic tool changer (ATC) speed moderating system, which is disposed between a tool magazine and a tool exchanging arm, includes an image capture device for capturing the image of tools, and a processing device connected with the image capturing device. The processing device includes a receiving module for receiving the images of tools, a calculating module for calculating an assessment value of a tool according to the image of the tool, and a signal transmitting module connected with a controller of the tool exchanging arm for transmitting the assessment value of the tool to the controller. Therefore, the tool changing speed of the tool changing arm is controlled and moderated.

The invention relates to the technical field of graphite purification, in particular to a purification method of microcrystal graphite. The purification method comprises the following steps of: firstly, mixing and grinding graphite with the fixed carbon content being 80%-85%, caustic soda and an assistant, then roasting, then crushing, adding water, grinding the mixture into fine slurry, then obtaining alkali-melting graphite by separation and washing; adding mixed acid (formed by mixing hydrochloric acid, phosphoric acid and ammonium fluoride according to a certain proportion) into the alkali-melting graphite for acidification, carrying out separation and washing after reaction and obtaining a high-purity wet graphite product; and finally drying and packaging the wet graphite product. By adoption of the innovative measures and matching with intermediate control for purifying the graphite materials, the impurities in the graphite can almost be removed, and finally the high-carbon graphite with 99% fixed carbon content can be obtained.

The invention discloses a vehicle-mounted application containerization isolation framework system based on IPFS and an implementation method, belongs to the technical field of vehicle networking safety, information safety and the like, and solves the potential information safety problem existing in operation and deployment of application software of a vehicle intelligent terminal and a vehicle-mounted system in an existing vehicle networking. The system comprises a unique container platform which is used for vehicle-mounted application installation and is deployed in a vehicle machine system of a vehicle, a decentration monitoring management platform which is used for safety monitoring and software review of a vehicle-mounted application program, and an IPFS protocol which is used for realizing communication between the container platform and the decentration monitoring management platform. The method is used for containerization isolation of the vehicle-mounted application.

The invention applies to the oil-producing industry and is intended for the intensification of processes increasing the yield of. oil wells developed by conventional methods during production of high viscosity oils. Both objects of said invention have as a technical result an increase in the permeability of a reservoir and a reduction in the viscosity of oil, added to an increase in environmental safety by avoiding use of chemical reagents and steam generators. First object of said invention applies a high power ultrasonic field in the well bottom 10 zone that reduces viscosity of oil, also heating said zone. Second object of said invention comprises a surface ultrasonic generator and at least one ultrasonic magnetostrictive radiator placed at end of oil well tubing, using high frequency currents that warm said tubing maintaining viscosity of oil during transport to the surface.

The invention relates to bacillus thuringiensis gene combination and engineering bacteria and a preparation method thereof and belongs to the field of biological prevention and control. The gene combination of cry8Eal, cry8Ca2 and cry3Aa7 has a synergistic effect between every two or among the three genes, particularly a good effect for the synergy between cry3Aa7 and cry8Eal as well as the synergy among the genes cry8Eal, cry8Ca2 and cry3Aa7. Engineering bacteria BIOT1853A thus constructed containing three genes are poisonous to holotrichia parallela, anomala corpulenta, potato beetles, colaphellus bowringi and other coleopter multiple pests at the same time, and in addition, maybe have higher poisonousness for several pests. The engineering bacteria BIOT1853A obtained through screening by allele homologous recombination are free of antibiotic genes, thereby enhancing the bio-safety of transgenic engineering bacteria.