43results about How to "Low environmental toxicity" patented technology

The invention relates to a preparation method of a denitration catalyst and relates to the technique field of preparation of supported denitration catalysts and the field of environment protection. The denitration catalyst takes a mesoporous titanium dioxide ball as a carrier and cerium tungsten manganese oxides as active ingredients. According to the key points of the preparation method, the mesoporous titanium dioxide ball is used as the carrier; three ingredients, namely cerium, tungsten and manganese, are supported on the surface of the mesoporous titanium dioxide ball by using an impregnation method so as to realize uniform dispersion and strong interactions of cerium, tungsten and manganese, and finally the efficient denitration catalyst is obtained through calcining. The catalyst has a mesoporous structure, so that the specific surface area of the catalyst is remarkably enlarged; by using multiple-ingredient cooperation effect, the catalytic activity of the catalyst is effectively improved; the temperature window is widened; the preparation method has the advantage of being environmentally friendly, simple in production technique and suitable for large scale industrial production, and can be used for removing nitric oxide emitted from a fixed source and a mobile source.

The invention belongs to the technical field of detection of enrichment of remained antibiotics in a water body environment, and particularly relates to a synchronous detection method of tetracyclines, fluoroquinolones and sulfonamide antibiotics remained in the water body. The detection method comprises the following steps: (1) performing water sample pretreatment; (2) performing small-column enrichment of target antibiotics by using solid-phase extraction; (3) detecting on a machine by using high performance liquid chromatography and tandem mass spectrum. According to the method, once the sample feeding is carried out at one time, multiple antibiotics in the water body can be detected at the same time, the time consumption of a detection process is reduced, the detection accuracy and sensitivity are increased, the detection limit is low, and the condition of the trace amount of remained antibiotics in the water body environment can be detected; meanwhile, the detection method is convenient to operate and low in environment toxicity and is low in using amount of organic reagents.

The invention discloses a method for simultaneously detecting six types of 24 antibiotics in livestock excrements by combination of ultrasonic extraction-solid phase extraction pretreatment and a liquid chromatography-mass spectrometry technology. The method comprises the following steps: (1) adding an internal standard substance for indicating the recycling rate in advance, and performing ultrasonic extraction; (2) performing solid phase extraction to enrich and purify target antibiotics; (3) performing the liquid chromatography-mass spectrometry technology to detect the contents of the 24 antibiotics. According to the method, the residue conditions of the six types of 24 antibiotics in the livestock excrements can be simultaneously detected at one time; the time of the detection processis short, the detection precision is high, the sensitivity, the stability and the selectivity are high, and the detection limit is low; by optimization of an extraction solvent, chelation between theantibiotics and metal ions in the excrements can be effectively reduced, so that the target antibiotics are separated from a sample, and the recycling rate is increased; furthermore, the method is easy and convenient to operate, high in enrichment factor and high in repetitiveness. The internal standard substance for indicating the recycling rate is added before the whole pretreatment process, sothat the loss of target substances in the pretreatment process can be well expressed, and a final result is more real and reliable.

The invention belongs to a loaded graphite phase carbonized nitrogen composite material and discloses a noble metal (Ag and Au) loaded composite nano-catalysis material and application thereof in catalytic reduction of p-nitrophenol. According to a preparation method, a two-step process synthetic technique is utilized, hydrochloric acid with a certain concentration is utilized for processing a melamine raw material, porous graphite graphite phase carbonized nitrogen is synthesized by virtue of high-temperature condensation, then an ultraviolet light reduction technique is utilized for loading metal nano-particles into a matrix or ducts of graphite graphite phase carbonized nitrogen, and finally Ag noble metal nano-particles with uniform sizes distribution and sizes and the diameters of 20nm-30nm are obtained. The composite material can be circularly utilized and has adjustable noble metal loading capacity and the recovery economy; the catalyst presents stable and excellent catalytic activity in the catalytic reduction of p-nitrophenol.

The invention relates to a method for preparing a denitrified catalyst by taking a molecular sieve as a carrier through cobalt-manganese metal ion double-exchange, belonging to the field of molecular sieve catalyst preparation technique and the field of environmental protection. The method mainly comprises the steps: by taking the molecular sieve as a carrier, firstly, enabling cobalt ions to enter the internal skeleton structure of the molecular sieve by using an ion exchange method, then carrying out manganese ion exchange to enter the molecular sieve on the basis of a cobalt ion exchange molecular sieve so as to realize the uniform dispersion and strong interaction of the cobalt-manganese ions, and finally calcining to obtain a high-efficiency denitrified catalyst. The catalyst has larger specific surface area, the catalyst activity of the catalyst can be effectively enhanced by utilizing double-metal synergistic effect, the temperature window can be extended, the method has the advantages of being harmless to the environment, simple in production technique, and suitable for large-scale industrial production and the like, and can be used for removing nitrogen oxide emitted by a fixed source and a mobile source.

The invention discloses a metallic monolithic structuring core-shell structured denitration catalyst and a preparation method thereof. The denitration catalyst is a metallic monolithic structuring core-shell structured catalyst obtained through in situ growth of hydroxide on a metallic monolithic carrier and one-step self-assembling by means of the bidirectional bridging effect of a coupling agent, wherein a main active component and an assistant are used as the core, and metal oxide is used as the shell. The catalyst comprises 0.01-30 wt% of the main active component, 0-30 wt% of the assistant, 0-50 wt% of the metal oxide, and the balance of the metallic monolithic material. The catalyst has the advantages of good low-temperature activity, excellent resistance to sulfur and water, simplepreparation method, no molding, and good heat conduction property, and is suitable for treating nitrogen oxides in tail gas discharged from a coal-fired power plant, a garbage incinerator and a steelmill.

The invention relates to a preparation method of an important medical intermediate product dimethoxy benzaldehyde. A dimethoxy benzaldehyde crystal is prepared from veratrole through a substitution reaction and an oxidizing reaction by treatment. The process disclosed by the invention has the advantages of easily available raw material, economical efficiency, applicability, moderate condition, high yield, good quality, low energy consumption and the like, and is applicable to industrial production.

The invention discloses a preparation method of a suspending agent containing pyraclostrobin and copper abietate, belonging to the technical field of agricultural sterilizing agents. The preparation method comprises the steps of synthesizing copper abietate in a water phase in one step, adding a pyraclostrobin crude drug during the synthesis, and preparing the suspending agent containing pyraclostrobin and copper abietate by virtue of a sand milling process. Being different suspending agent compounding processes in the prior art, the preparation method has the advantages that copper abietate can be synthesized in one step, and the suspending agent containing pyraclostrobin and copper abietate can be produced. The mass percentage of pyraclostrobin to copper abietate contained in the suspending agent is (1 to 20)-(2 to 1), the mass percentage of effective components (namely pyraclostrobin and copper abietate) in the composition is 5%-40%, and the rest components are aid components and water required in the preparation process of the suspending agent. The compounded suspending agent is mainly used for preventing and treating multiple fungal and bacterial diseases of crops and simultaneously has an obvious stimulation effect to the growth of the crops.

The invention relates to an antirust coating, an antirust method and application of the antirust coating. The antirust coating comprises the following components: a compound with sulfo-carbonyl, water-dispersible silicon dioxide, nitrite, tri-n-butylamine and nitrilo-triethanolamine. The antirust method comprises the following steps of: applying the antirust coating on an object to be coated, and then heating the coated object by hot air to be dried; or heating the object to be coated, applying the antirust coating on the heated object, and drying the object by heat retained in the object. The antirust coating is suitable for being applied on zinc-plated steel or aluminum-plated steel or non-plated steel so as to perform antirust treatment on the zinc-plated steel or the aluminum-plated steel or the non-plated steel. The non-chrome antirust coating provided by the invention has the advantages of excellent storage stability, relatively low environmental toxicity and high antirust performance.

The invention provides a method for simultaneously detecting 15 antibiotics in an aquaculture water body by solid-phase extraction pretreatment combined with a liquid chromatography-mass spectrometrytechnology. The method comprises the following steps: (1) water sample pretreatment: adding seven internal standard substances for indicating the recovery rate, namely sulfamethoxazole-13C6, norfloxacin-D5, penicillin G potassium salt-D5, achromycin-D6, olaquindox-D4, amoxicillin-13C6 and trimethoprim-D3; (2) enriching and purifying target antibiotics by using a solid-phase extraction column; (3)detecting the contents of the 15 antibiotics in seven categories in the aquaculture water body with a liquid chromatograph / mass spectrometer by adopting an internal standard method. The method provided by the invention has the benefits that with the adoption of a single-factor experiment, the residue situations of the 15 antibiotics containing 8 new antibiotics in the aquaculture water body can besimultaneously detected at a time by preferably selecting the internal standard substances and optimizing detection conditions; the method has the advantages of high precision, high sensitivity, highstability, high selectivity, low detection limit, more true and reliable detection results and the like.

The invention discloses a steel corrosion inhibitor and a preparation method thereof, and belongs to the technical field of metal corrosion and protection. The corrosion inhibitor is prepared in the step of compounding 1,1-di(benzothiazole-2-group)-2-(N-benzylcarbazole-2-group)ethylene as a core corrosion inhibiting component with an organic solvent, surfactant, dispersant and water. The corrosioninhibitor has obvious anti-corrosion effects on various kinds of steel in all conditions of acid, alkali and salt. The steel corrosion inhibitor has the advantages of simple formula, simple and convenient preparation process, safety in operation, low toxicity, high efficiency and environmental friendliness.

This disclosure relates to flame retardants that are useful for epoxy resin systems. Coating compositions and methods are provided the include an epoxy resin and a phosphate-containing flame retardant wherein the phosphate-containing flame retardant is selected from Group 1 metallic salts of a phosphate of a saccharide, Group 2 salts of a glycerophosphate, and Group 1 metallic salts of a polyphosphate. The provided flame retardants have low toxicity and are friendly to the environment.

The invention relates to a preparation method of 1,4-diamido-2,3-dicyano anthraquinone. The preparation method comprises steps as follows: 1,4-diamido-2,3-dichloroanthraquinone is taken as a raw material and is heated to reflux with a high-boiling-point polar solvent as a reaction medium and formamide as a cyanation reagent in the presence of a phase transfer catalyst, a dehydrating agent and an acid-binding agent, a product is cooled, filtered, washed with water and dried, and 1,4-diamido-2,3-dicyano anthraquinone is prepared. The technical scheme has the characteristics of low environmental toxicity, low environmental protection pressure and simplicity in technological operation; the prepared 1,4-diamido-2,3-dicyano anthraquinone reaches the same level of the prior art when used for preparing disperse turquoise blue S-GL.

The invention discloses an environmentally friendly algaecide, wherein the algaecide is garlic water extract or garlic lactic acid extract. Compared with the prior art, the algaecide has the characteristics of strong algae inhibition effect and low environmental toxicity.

The invention relates to a denitration catalyst capable of resisting alkali metal poisoning and a preparation method thereof, wherein the catalyst can be used for removal of NOx discharged from stationary sources and moving sources. By means of a new alkali metal ion capture method, the alkali metal ions are immobilized in pores in a hollandite oxide through ion exchange, so that catalytic activity of a molecular sieve is not influenced and capability of resisting alkali metal poisoning is greatly enhanced. In the catalyst, SCR catalytic activity is supplied by the molecular sieve, so that thecatalyst has advantages of high activity, good selectivity and wide temperature window. The alkali metal ions are captured by means of the hollandite oxide, so that the capability of resisting alkalimetal poisoning of the catalyst is effectively improved. The method is environment-friendly, is simple in production process and can be used for large-scale industrial production. The catalyst can beused for removal of NOx discharged from fixed sources and moving sources.

The invention provides a method for preparing hollow metal oxide microspheres. The method comprises the following steps: 1) preparing carbon microspheres; 2) contacting the carbon microspheres with a solution containing metal ions so as to adsorb the metal ions to the carbon microspheres; and (3) calcining the carbon microspheres treated in the step (2) to enable the adsorbed metal ions to form the hollow metal oxide microspheres, and controlling the treatment temperature and / or time in the step (2) to obtain the single-shell or multi-shell hollow metal oxide microspheres. The invention also provides application of the hollow metal oxide microsphere as a drug carrier and a drug sustained release system comprising the hollow metal oxide microsphere. The hollow metal oxide microspheres provided by the invention can greatly prolong the effective action time of drugs and reduce the environmental toxicity of the drugs, and have wide application prospects in the aspect of antimicrobial coatings.

The invention relates to a synthetic method of an organic drug alpha-lipoic acid zinc. Specifically, the synthetic method comprises: by taking alpha-lipoic acid as the raw material, preparing the alpha-lipoic acid into the alpha-lipoic acid zinc by virtue of one-step salt forming reaction. The synthetic method is simple, easy to implement, low in toxicity, environment-friendly, high in yield and high in content of product.

The invention provides a method for detecting the leakage of a seal chamber based on spontaneous expanding gas, and belongs to the technical field of leakage detection. The method specifically comprises the steps: placing a solid material, which can generate expanded gas when meeting heat or is volatile under the normal temperature, in the seal chamber as a reagent before the assembly of the seal chamber; carrying out the assembly to form the seal chamber, heating the seal chamber to proper temperature during leakage detection (there is no need of heating when a reagent is volatile under the normal temperature), and separating out the gas in the solid reagent, wherein the gas tends to overflow because of the miniature pressure difference generated by the gas. When the seal chamber has a leakage problem, the method can detect the gas outside the seal chamber. When the method is used for the detection of the leakage of the seal chamber, the method can effectively achieves the leakage detection of a seal chamber which is compact in structure or has any complex structure.

The invention relates to a Chinese and western medicinal compound preparation for preventing and treating bullfrog streptococcus agalactiae diseases and a preparation method, and belongs to the technical field of fish medicines. The Chinese and western medicinal compound preparation is characterized by consisting of the following substances in percentage by weight: 15 to 25 percent of Chinese gall, 5 to 15 percent of common andrographis herb, 10 to 20 percent of rhubarb, 10 to 20 percent of honeysuckle flower, 5 to 15 percent of neomycin sulfate and 25 to 35 percent of starch. The Chinese andwestern medicinal compound preparation is prepared by combining the neomycin sulfate which has a treatment effect on germs and serves as a western medicine, the Chinese gall, the common andrographis herb, the rhubarb and the honeysuckle flower which serve as Chinese medicines and the starch serving as an auxiliary material, has obvious synergistic effect and high curative effect, lasting medicinal effect and low toxicity to the environment and can arouse quick response, and the tolerance is difficult to generate; and the preparation process is simple, easy to realize, safe and convenient to use, popularize and apply.

The invention relates to an antimony-doped cerium-tungsten loaded titanium dioxide catalyst prepared through an ultrasound-assisted impregnation method. A preparation method comprises the steps that (1) by weight, 1-7% of antimony precursor salt, 10% of cerium precursor salt and 6% of precursor salt are added into deionized water; (2) the precursor salts are dissolved and placed in an ultrasonic pool for one hour, then a titanium dioxide carrier is added and put into a water bath kettle to be stirred for 0.5 h and then heated up to 80 DEG C till the precursor salts are completely loaded on thecarrier, and the carrier is placed in an air dry oven at 120 DEG C to be dried; and (3) an obtained sample is ground and calcined at 500 DEG C. The catalyst has the large specific surface area, the temperature window can be expanded effectively, and meanwhile, the antimony-doped cerium-tungsten loaded titanium dioxide catalyst has the advantages of being quite high in water resistance stability,simple in production process, suitable for large-scale industrial production and the like, and can be used for removing nitrogen oxide discharged by a stationary source and a moving source.

The invention relates to a Chinese and western medicinal compound preparation for preventing and treating bullfrog streptococcus agalactiae diseases and a preparation method, and belongs to the technical field of fish medicines. The Chinese and western medicinal compound preparation is characterized by consisting of the following substances in percentage by weight: 15 to 25 percent of Chinese gall, 5 to 15 percent of common andrographis herb, 10 to 20 percent of rhubarb, 10 to 20 percent of honeysuckle flower, 5 to 15 percent of neomycin sulfate and 25 to 35 percent of starch. The Chinese andwestern medicinal compound preparation is prepared by combining the neomycin sulfate which has a treatment effect on germs and serves as a western medicine, the Chinese gall, the common andrographis herb, the rhubarb and the honeysuckle flower which serve as Chinese medicines and the starch serving as an auxiliary material, has obvious synergistic effect and high curative effect, lasting medicinal effect and low toxicity to the environment and can arouse quick response, and the tolerance is difficult to generate; and the preparation process is simple, easy to realize, safe and convenient to use, popularize and apply.

The invention relates to a synthetic method of pterostilbene sodium succinate which is a pharmaceutical precursor bulk drug. Pterostilbene is used as a raw material, pterostilbene sodium succinate crystals are obtained through an esterification reaction and a salt forming reaction. The process has the advantages that routes are simple, conditions are mild, energy consumption is low and the method is suitable for industrial production and the like, and has high yield, high product content, and good water solubility.