38 results about "Metal poisoning" patented technology

Methods and pharmaceutical compositions for preconditioning and/or providing neuroprotection to the animal central nervous system against the effects of ischemia, trauma, metal poisoning and neurodegeneration, including the associated cognitive, behavioral and physical impairments. In one embodiment, the method is accomplished by stimulating and stabilizing hypoxia-inducible factor-1α (HIF-1α). HIF-1α is known to provide a neuroprotective benefit under ischemic conditions. Patients at risk for certain diseases or disorders that are associated with risk for cerebral ischemia may benefit, e.g., those at risk for Alzheimer's disease, Parkinson's disease, Wilson's disease or stroke or those patients having head or spinal cord injury. Patients undergoing certain medical procedures that may result in ischemia may also benefit. Initially, the possibility of ischemia or neurodegeneration is recognized. Intranasal therapeutic agents are administered to the upper third of the nasal cavity to bypass the blood-brain barrier and access the central nervous system directly to avoid unwanted and potentially lethal side effects. Therapeutic agents include those substances that interact with iron and/or copper such as iron chelators, copper chelators, and antioxidants. A particular example of such therapeutic agents is the iron chelator deferoxamine (DFO). Intranasal administration of DFO is known to stimulate and/or stabilize HIF-1α and provides an efficient and safe method for pre-conditioning the brain to protect against cerebral ischemia. Moreover, DFO is shown to decrease weight loss in subjects when administered pre and/or post stroke.

Methods and pharmaceutical compositions for preconditioning and/or providing neuroprotection to the animal central nervous system against the effects of neurological disorders involving ischemia, trauma, metal poisoning and neurodegeneration, including the associated cognitive, behavioral and physical impairments. In one embodiment, the method is accomplished by stimulating and/or stabilizing hypoxia-inducible factor-1α (HIF-1α). HIF-1α is known to provide a neuroprotective benefit under ischemic conditions. In another embodiment, the method is accomplished by differentially reducing, inhibiting or preventing the increased expression of selected genes caused by neurological disorders. Patients at risk for certain diseases or disorders that are associated with risk for cerebral ischemia may benefit, e.g., those at risk for Alzheimer's disease, Parkinson's disease, Wilson's disease, Huntington's disease, thalassemia or stroke, or those patients having head or spinal cord injury. Patients undergoing certain medical procedures that may result in ischemia may also benefit. Initially, the possibility of ischemia or neurodegeneration is recognized. Intranasal therapeutic agents are administered to the upper third of the nasal cavity to bypass the blood-brain barrier and access the central nervous system directly to avoid unwanted and potentially lethal side effects. Therapeutic agents include those substances that interact with iron and/or copper such as iron chelators, copper chelators, and antioxidants. Particular examples of such therapeutic agents are the iron chelators deferoxamine (DFO) and deferasirox. Intranasal administration of DFO is known to stimulate and/or stabilize HIF-1α and provides an efficient and safe method for pre-conditioning the brain to protect against cerebral ischemia.

The invention discloses a honeycomb low-temperature denitration catalyst and a preparation technology thereof. The catalyst is prepared by a simple preparation technology and is easy to mould; in addition, the prepared catalyst is high in low-temperature activity and strong in resistance to water, sulfur and alkali (earth) metal poisoning; furthermore, a waste SCR catalyst is used as a raw material, so that the cost is low, resource utilization of the waste SCR catalyst can be achieved, and recycling of the waste SCR catalyst can be achieved.

The invention belongs to the field of environmental protection technology and denitration catalysis, and particularly relates to an SCR denitration catalyst for resisting alkali metal poisoning and apreparation method thereof. The catalyst carrier provided by the invention is a titanium nano-tube, the active ingredient is vanadium pentoxide, and the catalytic assistants are tungsten trioxide, antimony trioxide and copper sulfate. A flat-plate type or honeycomb type SCR denitration catalyst with alkali metal poisoning resistance is prepared by adopting a rolling coating or extrusion molding process. The catalyst provided by the invention has the advantages of simple production process, easy implementation of industrial production, and very good alkali metal poisoning resistance and mechanical performance, can solve the problem of alkali metal poisoning of the denitration catalyst, and is suitable for flue gas with high alkali metal content.

The invention discloses a novel cerium oxide denitration catalyst. The novel cerium oxide denitration catalyst has the expression formula of CeNaOx, wherein the molar ratio of Ce to Na is (90-98):(10-2), and x is balanced and determined by positive and negative valence electrons in each atom. The preparation method of the catalyst comprises the following steps of: 1, dissolving cerous sulfate, sodium phosphate and cerium sulfate in water at normal temperature, and stirring to form a transparent solution; 2, transferring the prepared solution into a hydrothermal reaction kettle, and adding deionized water; 3, sealing the hydrothermal reaction kettle and transferring the hydrothermal reaction kettle to an oven for heating and reacting, reducing the temperature, performing centrifugal separation, and cleaning until no sulfate radical is detected by using deionized water; and 4, drying and roasting the centrifuged precipitate, thereby obtaining the catalyst. The metallic oxide catalyst is in the range of 200-500 DEG C, and the purification efficiency of nitric oxide is 71-100 percent; and the composite oxide catalyst has high high-altitude-resistant speed and good alkali-resistant metal poisoning performance, the efficiency is greatly improved, and the operating cost can be obviously reduced.

The invention discloses a bamboo shoot superfine powder adsorbent and a preparation method thereof. The bamboo shoot superfine powder adsorbent disclosed by the invention is prepared by taking bamboo shoots as raw materials. The preparation method comprises the following steps: (1) selecting the raw materials and washing; (2) chopping; (3) drying; (4) roughly crushing and sieving; (5) carrying out enzyme activating treatment; (6) drying; and (7) carrying out superfine crushing and sieving. According to the bamboo shoot superfine powder adsorbent, celluloses and hemicelluloses in the bamboo shoots are degraded by the enzyme activating treatment so that the bamboo shoots can be converted into soluble micro-molecular dietary fibers; the whole structure is bulked and porous; a superfine crushing technology is adopted so that the specific surface area of the bamboo shoot dietary fibers is enlarged and the adsorption capacity of the bamboo shoot dietary fibers is enhanced; the superfine bamboo shoot powder adsorbent is added into foods and plays roles in helping adsorption of residual heavy metal in a human body, and avoiding the metal poisoning.

The invention belongs to the field of environmental protection technologies and denitration catalysis, and particularly relates to an alkali metal poisoning SCR denitration catalyst recycling and reusing method. The method specifically comprises soot blowing, cleaning with cleaning liquid, reducing and acid leaching, alkali metal poisoning resisting auxiliary loading, active component loading andthe like. In the alkali metal poisoning SCR denitration catalyst recycling and reusing method, a one-piece alkali metal poisoning SCR denitration catalyst serving as a raw material is subjected to insitu regeneration to obtain a catalyst having alkali metal poisoning resistance. The regenerated catalyst obtained by the invention has the advantages of high denitration activity, high resistance toalkali metal poisoning, low SO2 oxidation rate and the like.

The invention belongs to the field of chemistry, and provided with a method used for post-treatment of on-pot in-situ synthesized Cu-SSZ-13 molecular sieve. The method comprises following steps: on-pot in-situ synthesized Cu-SSZ-13 molecular sieve is added into an alkali solution with a pH value of 7 to 10, stirring is carried out for 2 to 24h at 25 to 80 DEG C, washing filtering and drying are carried out so to obtain the Cu-SSZ-13 catalyst. The catalyst prepared using the method is excellent in low temperature activity, hydro-thermal stability, and metal poisoning resistance, is capable of adapting the complex strict working conditions in a diesel car post-treatment system, can be used for selectively catalytic reduction of nitrogen oxide (NOx) with ammonia gas in a diesel car post-treatment system for purifying of diesel car tail gas NOx; the weal alkali solution is adopted, requirements on reaction equipment are low, raw material sodium hydroxide or potassium hydroxide are easily available, low in cost, and convenient for transportation and storage, operation is safe, and the method is suitable for large scale industrial production.

The invention relates to the field of waste gas chemical or biological purification, in particular to a cement kiln smoke gas denitration device. The cement kiln smoke gas denitration device comprisesa smoke gas conveying device, an ammonium hydroxide conveying device and a denitration reactor, wherein the smoke inlet side of the smoke gas conveying device is connected with a smoke outlet of a kiln furnace; the smoke outlet side of the smoke conveying device is connected with a denitration reactor; the ammonium hydroxide conveying device is connected with the denitration reactor. The cement kiln smoke gas denitration device related by the invention can be transformed on the basis of the original cement kiln furnace; the SNCR-SCR combined denitration process is developed; a reducing agentammonium storage system is shared; the NOX standard reaching discharge is realized; the engineering manufacturing cost is reduced; the problems of SCR denitration catalyst blockage, abrasion, basic metal poisoning and the like can be effectively solved; the service life of the SCR denitration catalyst is prolonged; the safe stable and standard reaching operation of the SCR denitration system are ensured.

The invention discloses a Pd-Zn bimetallic catalyst for preparing an aromatic cyano compound. The catalyst is prepared by the following steps: uniformly stirring palladium acetate and zinc salt in DMF, adding a certain amount of PVP as a stabilizer, stirring until the solution is clear and transparent, adding a reducing agent KBH4, and stirring for reaction to obtain the Pd-Zn bimetallic catalyst. A reaction process using the Pd-Zn bimetallic nanoparticles as a catalyst does not need additional ligand. The catalyst is at nano level, the probability of contact of catalytic active sites with a reaction substrate is larger, the catalytic activity is higher, and Pd and Zn in the catalyst form an alloy structure to effectively prevent Pd metal poisoning and prolong catalysis life.

The invention belongs to the technical field of ethanol fuel cells and provides an ethanol fuel cell anode and a preparation method thereof for overcoming the problems of corrosion of conductive carbon, the aging of adhesive and precious metal poisoning in the prior art. The ethanol fuel cell anode is formed by directly coating the surface of foamed copper by using a non-precious metal La1-xNi1+xO3 film, and the material cost is greatly reduced compared with a conventional platinum and palladium precious metal system. A La1-xNi1+xO3 perovskite film and the foamed copper are compounded by laserpulse at high temperature, and so that a surface catalytic layer and a current collector form a composite material. The composite effect of simultaneously catalyzing and collecting current and enhancing the electrical conductivity of the whole system is generated, and at the same time, the use of the conductive carbon and adhesive is avoided. The failure of a working electrode caused by the carbon corrosion and adhesive aging can be completely avoided. In addition, the preparation process is simple, the preparation cost is low, and the industrial production is facilitated.

The invention discloses feed capable of improving the metal poisoning of chicken. The feed is prepared from the following components: fish meal, soybean meal, peanut meal, rapeseed meal, wheat middling, corn gluten meal, soybean oil, fish oil, calcium citrate, a lactic acid type acidifying agent, enteric zinc oxide, zinc glycinate, copper lysine, ferrous glycinate and premix. The invention further discloses a preparation method of the feed capable of improving the metal poisoning of the chicken. The feed contains a plurality of organic microelements and the enteric zinc oxide and the like so that the adding amount of inorganic microelements in the broiler chicken feed can be effectively reduced, and the pollution to the environment by the residues of heavy metal in excrement of the broiler chicken is reduced; the pH value in stomachs of the broiler chicken can be reduced by calcium citrate and the lactic acid type acidifying agent; and meanwhile, the normal flora of intestinal tracts can be maintained by a micro-ecology and the diarrhea of piglets is reduced.

The invention relates to the field of radix puerariae planting and specifically relates to a high yield radix puerariae planting method. The method includes (1) performing soil preparation; (2) growing seedlings; (3) planting. According to the invention, organic modified bentonite is mixed with soil; the organic modified bentonite is good in adsorption performance and regeneration performance, andcan fix chromium in soil as a bonding agent so as to prevent chromium to migrate to the surroundings. When the PH value is 6-7, the adsorption rate of chromium is over 90%, so that chromium metal poisoning can be prevented effectively.

The invention relates to two novel amino substituted carboxylic acid compounds and a preparation method thereof. The compounds can be used for the prevention and treatment of in-vivo metal poisoning and the preparation of metal decorporation medicaments and health products. The amino substituted carboxylic acid compounds combine the advantages of aminocarboxylic acid and phenolic hydroxyl; and the two novel chelators designed by effectively introducing carboxyl chelation groups onto the benzylic site of a benzene ring have fine metal poisoning prevention and treatment activity and metal decorporation activity. By adding the effective chelation groups on the benzylic site in the molecule chelation center, the nuclide ion bonding capability is enhanced, so that the compounds can be easily formed into stable complexes, thereby accelerating the in-vivo discharge and improving the decorporation effect and poisoning prevention and treatment effect of metal (especially uranium).

The invention relates to a metal-poisoning in-vivo-extract checking device, and belongs to the technical field of medical apparatuses and instruments. The metal-poisoning in-vivo-extract checking device comprises a base disc, a current-variator support fixing disc is arranged on the upper side of the base disc, a current-variator support is arranged on the upper side of the current-variator support fixing disc, a current variator is arranged on the upper side of the current-variator support, an inner sliding rod and a resistor are arranged inside the current variator, a sliding-rod slider is arranged on the inner sliding rod, a sliding-information receiver is arranged on the front side of the sliding-rod slider, an electric-shocking conical head support is arranged on the right side of the sliding-rod slider, an electric-shocking conical head is arranged on the right side of the electric-shocking conical head support, and a stretching line fixer is arranged on the electric-shocking conical head support. The metal-poisoning in-vivo-extract checking device is complete in function and convenient to use, and when the metal element content of metal-poisoning patients is checked, the device is safe and efficient, time and labor are saved, and workloads of medical workers are greatly reduced.

The invention provides a preparation method of a catalyst protective agent filler. According to the invention, a filler with catalytic activity and filtration protection effects can be prepared by effective utilization of a waste hydrogenation catalyst. The filler can be filled in the bottom and the upper part of a catalyst in a catalytic reactor and is used to replace a traditional ceramic packing ball or ceramic drilled packing ring. The product is ball-shaped, ring-shaped, bar-shaped and the like, and there are a lot of connected micropores therein. Porosity can exceed 50%. The micropores have effects of filtering of subparticle impurities in oil refining materials, purification of raw materials, uniform distribution and the like. In addition, the catalyst protective agent filler can better protect a catalyst, prolong service life of the catalyst and prevent the catalyst from metal poisoning than traditional catalyst protective agents such as porcelain balls, porcelain rings and the like. The method provided by the invention can be adopted to save resources and raise benefit, and is easy to implement technically.