62 results about "Arsenic poisoning" patented technology

The catalyst includes inorganic oxide carrier, main active metal Pd and IB family assistant active component, and the active metal component is distributed homogeneously in the carrier from the surface to 300 microns depth. The catalyst has high activity, high selectivity and capacity of resisting sulfur and arsenic poisoning, and is suitable for any C2 and C3 fractions with any H2 and CO content.

The invention discloses a regeneration method of arsenic / phosphorus-poisoned selective catalytic reducing denitrification catalyst. The method comprises the following steps of mechanically clearing ash, washing by adopting the alkaline washing liquid, immersing by adopting a regeneration liquid and drying, wherein the alkaline washing liquid is a mixed solution of strong-alkali weak-acid salt and surface active agent and the acid regeneration liquid consists of ammonium salt, weak acid, ammonium metavanadate and ammonium molybdate. The arsenic / phosphorus-poisoned selective catalytic reducing denitrification catalyst is regenerated by adopting the method, the arsenic and phosphorus can be basically removed of the catalyst, the catalyst has a certain arsenic poisoning resistance, the denitrification rate can reach 81 to 88 percent, and the pressure-resisting strength and the abrasive strength of the catalyst can be maintained; in addition, the regeneration process flow is simple, the processing efficiency is high, and the regeneration method is applicable to the industrial mass production.

The invention discloses a regeneration method for an arsenic poisoning selective catalytic reduction denitration catalyst. The regeneration method comprises the following four steps of blowing ash, dipping, dipping, and drying and roasting. According to the regeneration method, an arsenic component which can cause SCR (Selective Catalytic Reduction) denitration catalyst poisoning can be effectively removed by using regenerated liquid and active ingredients can be supplemented; an SCR denitration catalyst obtains a certain arsenic poisoning resisting capability; meanwhile, a regeneration process is greatly simplified and the regeneration cost of the SCR denitration catalyst is reduced; with the adoption of the method, the regenerated denitration catalyst can be used for carrying out denitration activity detection and the denitration rate can be up to 80-88%.

The invention relates to a method for preparing an SCR deNOx catalyst. The method comprises: 1. dissolving a certain amount of ferrous sulfate in water; 2. adding anatase type nanometer TiO2, wherein the mass ratio of ferrous sulfate to the TiO2 is 1: (2-30); 3. adding a silicate nanoporous material, wherein the mass ratio of the silicate nanometer material to the TiO2 is 1 : (0.5-2) to stir evenly; 4. heating and stirring the obtained solution until the solution is dried, and drying the solution for 1 to 10 hours at a temperature of between 60 and 160 DEG C; and 5. burning the dried solution in the step 4 by oxygen for 0.5 to 5 hours at a temperature of between 200 and 350 DEG C, and calcining the dried solution in the presence of nitrogen at a temperature of between 350 and 450 DEG C for 4 to 48 hours to obtain the catalyst. Furthermore, the invention also relates to the SCR deNOx catalyst prepared by the method for preparing the SCR deNOx catalyst. The catalyst has arsenic poisoning resistance and sulfur oxidizing resistance, can be formed through various processes, and is applicable to electrical power and related enterprises in flue gas selective catalytic denitration and other energy environment-friendly industrial fields.

The invention discloses a regeneration method of an arsenic poisoning denitration catalyst. The method includes the following steps that after the denitration catalyst is subjected to dust removal, the denitration catalyst is placed in a reactor, 100-10000 h<-1> synthesized gas is introduced, a reduction reaction is conducted at the temperature of 100 DEG C-350 DEG C for 0.5-6 hours, synthesized gas continues being introduced, 100-5000 ppm acid gas is introduced at the temperature of 350 DEG C-550 DEG C for a reduction-acidification reaction, and after the reaction is conducted for 0.5-3 hours, the regenerated denitration catalyst is prepared. The regeneration method has the advantages that the situation that a lot of acidic / alkaline wastewater is generated in the regeneration process through a wet method, and the active component V2O5 of the denitration catalyst is lost can be avoided; the activity of the regenerated denitration catalyst is enhanced; the catalyst does not need to be cleaned with cleaning fluid later, and total energy consumption is reduced.

The fluorine and arsenic removing water purifier consists of mainly attapulgite powder and active carbon, and is prepared through activating attapulgite powder, mixing activated attapulgite powder with active carbon in certain ratio, crushing to 80 mesh, crushing polyaluminium chloride powder to 80 mesh and other steps. The fluorine and arsenic removing water purifier has high fluorine and arsenic removing capacity, and can also eliminate inorganic heavy metal ions and polar and nonpolar organic molecules from water. The present invention may be used in purifying various kinds of surface polluted water, domestic sewage and industrial effluent, has low cost, easy use and great water treating capacity, and is suitable for rural district.

Personal care products useful for the maintenance of personal appearance and good health and minor treatments that do not require professional health care, as well as products that provide a combination of anti-microbial, anti-oxidant, anti-inflammatory, and anti-aging properties and are suitable for use without a prescription. The products utilize a biomembrane permeable organosulfur compound that can redox cycle between thiol, disulfide, and thiosulfinate forms in response to oxidants and antioxidants inside and outside of cells. Example products include an anti-microbial toothpaste with anti-plaque properties, an anti-inflammatory skin lotion with antioxidant, antimicrobial, and deodorant properties, and an anti-toxin skin lotion with anti-arsenicosis properties.

The invention discloses a honeycomb de-nitration catalyst suitable for high-arsenic fume and a preparation method of the honeycomb de-nitration catalyst. The catalyst is a V2O5-MoO3-TiO2 system catalyst, and the catalyst comprises the following components in parts by weight: 77-96 parts of TiO2, 1.5-10 parts of MoO3, 0.15-3 parts of V2O5, and 2-10 parts of SiO2. The invention discloses a preparation method of the catalyst. According to the honeycomb de-nitration catalyst disclosed by the invention, molybdenum is added to a conventional V-Ti system catalyst, an organic additive is changed, and an inorganic additive is added, so that a hole structure is enriched, and the arsenic poisoning resistance of the de-nitration catalyst is improved. The molybdenum can react with vanadium in the catalyst to generate a metal complex, so that the vanadium can be protected, and the vanadium is prevented from generating vanadium arsenate and poisoning deactivation; and the rich hole structure of the catalyst enables the catalytic reaction to have an enough place, and besides, the speed that As2O3 blocks ducts can be decelerated.

The invention provides application of an alkyne selective hydrogenation catalyst to the removal of alkyne from hydrogenation C4 distillates. The catalyst comprises a titanium oxide-aluminum oxide composite oxide carrier and the following components loaded on the carrier: a) 1 to 20 weight percent of copper, b) 0.05 to 3 weight percent of cobalt, c) 0.05 to 1 weight percent of one or more lanthanide metals, and d) optional zinc and / or nickel. When being used for alkyne selective hydrogenation, the catalyst has high activity and selectivity, and can resist sulfur poisoning and arsenic poisoning; and the using time of the catalyst is obviously prolonged. Therefore, the catalyst is particularly suitable for a selective hydrogenation process of an alkyne in a mixed C4 hydrocarbon.

The invention discloses an arsenic poisoning resistance and wide active temperature window integrated low-SO2-oxidation-ratio SCR (selective catalytic reduction) denitration catalyst and a preparationmethod thereof. The catalyst is characterized by comprising, by weight, 0.5%-5% of V2O5, 0.5%-5% of WO3, 0.5%-15% of MoO3, 2%-20% of SiO2 and the balance TiO2, wherein V2O5, WO3, MoO3, TiO2 and SiO2are key components, and oxides with main components of TiO2 and SiO2 form a composite carrier of the catalyst. By adoption of a special modifying agent and a preparation method, the composite carrierenhances mutual action between active components and the carrier, a large specific surface area is provided, uniform dispersion level of the active component is improved, and a significant effect on catalyst performance improvement is achieved. Under the joint action of multiple factors, the catalyst has advantages of wide active temperature window, arsenic poisoning resistance and low SO2 oxidation ratio.

A method for low-cost arsenic removal from drinking water using chemically prepared bottom ash pre-treated with ferrous sulfate and then sodium hydroxide. Deposits on the surface of particles of bottom ash form of activated iron adsorbent with a high affinity for arsenic. In laboratory tests, a miniscule 5 grams of pre-treated bottom ash was sufficient to remove the arsenic from 2 liters of 2400 ppb (parts per billion) arsenic-laden water to a level below 50 ppb (the present United States Environmental Protection Agency limit). By increasing the amount of pre-treated bottom ash, even lower levels of post-treatment arsenic are expected. It is further expected that this invention supplies a very low-cost solution to arsenic poisoning for large population segments.

The invention discloses a denitration catalyst for improving the arsenic poisoning resistance as well as a preparation method and application of the denitration catalyst, and belongs to the technicalfields of environmental protection and catalysts. According to the preparation method disclosed by the invention, an anti-arsenic assistant is introduced into the preparation process of the denitration catalyst to obtain a new denitration catalyst, so that the chemical stability of existing vanadium-based and cerium-based catalysts is effectively improved; in addition, the new denitration catalystis used for stationary source denitration. The test shows that the denitration activity of a simulated poisoning catalyst under arsenic-containing condition is significantly improved compared with that of a fresh catalyst after anti-poisoning elements are added, the conversion rate of NO can be increased from 35 percent at 300 DEG C to 78 percent or above and the optimal NO conversion rate can beas high as 88 percent; in addition, the conversion rate of the NO further reaches 90 percent after the temperature is increased to 400 DEG C. The optimal anti-arsenic additive is magnesium salt; thearsenic poisoning resistance of the catalyst can be well improved by the synergistic effect of Mg and As; besides, and the influence of component addition on a temperature window and the activity is greatly avoided.

The invention belongs to the fields of environmental protection technology and denitration catalysis, and specifically relates to an SCR denitration catalyst with arsenic poisoning resistance and a preparation method thereof. The catalyst adopts a titanium nanotube as a carrier, vanadium pentoxide as an active ingredient, molybdenum trioxide as a catalytic prompter and stannic oxide as an arsenicresistant promoter, and the flat plate or honeycomb type SCR denitration catalyst with arsenic poisoning resistance is obtained by adopting roll-in coating or extrusion molding technology. The catalyst is simple in production technology and easy for industrial production, has excellent arsenic poisoning resistance and denitration activity, simultaneously has extremely high mechanical performance,and has unique advantages in severe exhaust gas with high dust and high arsenic.

The invention discloses a method for regenerating an arsenic poisoning V2O5-WO3 / TiO2 catalyst of an SCR (Selective Catalytic Reduction) denitration technique. According to the method, a FeCl3 solution is adopted as a regenerated solution for a regeneration reaction, preferably with the combination of pretreatment such as dust removal and cleaning and aftertreatment such as roasting. By adopting the method, arsenic on the surface of the V2O5-WO3 / TiO2 catalyst can be efficiently removed, the activity of the catalyst can be effectively recovered, active components of the catalyst can be effectively retained, and meanwhile the method is simple and convenient to operate, low in regeneration cost and applicable to industrial popularization and application.

The invention relates to an arsenic poisoning SCR (selective catalytic reduction) denitration catalyst regeneration method and in particular discloses a catalyst cleaning process for efficiently removing arsenic by using cleanout fluid with a neutral pH value. The invention aims to provide the arsenic poisoning SCR denitration catalyst regeneration method. The arsenic on the surface of an SCR denitration catalyst is removed to the greatest degree under the condition that the pH value is neutral, the original mechanical strength of the catalyst is not reduced, losses of active ingredients of the cleaned SCR denitration catalyst can be reduced as much as possible, and a certain amount of anti-poisoning aids are implanted, so that the catalyst has a certain arsenic poisoning resistance.

The invention provides a Chinese traditional medicine for curing and preventing poisoning caused by overmuch element such as fluorin, lead, mercury, arsenic. It is made up of honeysuckle flower, Tuckahoe, job's-tears kernel, white fungus, liquorice, mung bean according to Chinese medicine theory and current medical theory. The producing method is: the above mentioned medicines are water extracted, alcohol deposited into capsule, oral liquid, particle, tablet. The medicine has functions of heat clearing and toxic materick removing, spleen invigorating and wetness eliminating, liver and kidney protecting, blood activating and high fluorin discharging and the discharge of toxic heavy metal element such as mercury, lead and arsenic, achieves the aim for discharging toxin and keeping healthy.

The invention discloses an arsenic removal method through combination of oxychlorination, ferric salt flocculation and microfiltration, which is used for removing arsenic in drinking water and comprises the following steps: adding ferric oxychloride and ferric salt into a flocculation reactor, providing certain flocculation action in an aeration or mechanical stirring manner, and oxidizing arsenic (III) into arsenic (V) by means of the oxychlorination agent; and meanwhile, enabling the hydrolysate of the ferric salt and arsenic (V) in raw water to form floccules, and separating by using a hollow fiber membrane to achieve the purpose of removing the arsenic. The arsenic removal method has the following benefits: a right amount of oxychlorination agent and ferric salt are added into an arsenic-containing water source, so that the residual arsenic and ferric content in the treated water can meet the requirements of sanitary standards for drinking water, thus being of great importance in reducing the incidence rate of drinking water type arsenic poisoning in China. A hollow fiber microfiltration membrane assembly can be designed into a fixed type or a mobile type as required, and the design scale can be flexibly selected so as to be applicable to emergent water supply for rural and remote regions and field water supply or emergency.

The invention belongs to the technology of environmental protection and the field of catalytic denitration, and particularly relates to a method for regenerating an arsenic poisoning SCR denitration catalyst. The method comprises the following steps: blowing dust and removing impurities for an arsenic poisoning SCR denitration catalyst; performing ultrasonic cleaning with deionized water under a condition of introducing ozone-air mixed gas; soaking and cleaning with an alkalescence solution; performing two-stage gradient reduction by adopting different reductive gases at different temperatures; and quickly heating and roasting in the air to obtain a regenerated catalyst. After the arsenic poisoning SCR denitration catalyst is regenerated by adopting the method, the denitration efficiency is recovered to the level of fresh catalyst, the arsenic removal rate is over 99 percent, and the arsenic positioning resistance of the regenerated catalyst can be greatly promoted. Furthermore, the method is simple in process, has relatively strong operability, and is suitable for large-scale industrial production.

Systems and methods for use of magnesium hydroxide, either directly or through one or more precursors, doped with a divalent or trivalent metal cation, for removing arsenic from drinking water, including water distribution systems. In one embodiment, magnesium hydroxide, Mg(OH)2 (a strong adsorbent for arsenic) doped with a divalent or trivalent metal cation is used to adsorb arsenic. The complex consisting of arsenic adsorbed on Mg(OH)2 doped with a divalent or trivalent metal cation is subsequently removed from the water by conventional means, including filtration, settling, skimming, vortexing, centrifugation, magnetic separation, or other well-known separation systems. In another embodiment, magnesium oxide, MgO, is employed, which reacts with water to form Mg(OH)2. The resulting Mg(OH)2 doped with a divalent or trivalent metal cation, then adsorbs arsenic, as set forth above. The method can also be used to treat human or animal poisoning with arsenic.

The invention relates to briquette coal for reducing fluorine and arsenic pollution in a stone coal combustion region, and provides a manufacturing method of fluorine fixation and arsenic fixation briquette coal applicable to the stone coal combustion region. The briquette coal is prepared from the following ingredients: 1, charred amomum (or anthracite); 2, ordinary blocky stone coal; 3, fluorine fixation and arsenic fixation additives; 4, clay, wherein the additives are lime powder and powdery slimy stone coal. Through in-field evidence and scientific experiment, the condition that the indoor air pollution in the southern part of Shanxi is the real source of fluorine poisoning and arsenic poisoning is deducted. Through household survey and questionnaire analysis, the briquette coal proportion capable of meeting the people's living needs and reducing the coal consumption pollution is found. For the optimal proportion scheme, the fluorine and arsenic release factor is averagely and respectively reduced by 45 percent and 72 percent; the concentration of fluorine, sulfur dioxide and ammonia gas in the air is respectively reduced by 34.1 percent, 96.47 percent and 92.51 percent. The briquette coal is directly and successfully manufactured in a briquette coal plant; the materials are easily obtained; the cost is low; the briquette coal is easy to popularize. The briquette coal has good experiment effects in farmer homes and can be widely applied to residential stoves in the stone coal combustion region.

The invention relates to a black arsenic poisoning SCR denitration catalyst regeneration method, in particular to a catalyst cleaning process for efficiently removing black arsenic by a cleaning solution with a neutral pH value. The invention aims to provide the black arsenic poisoning SCR denitration catalyst regeneration method. Under the condition that the pH value is neutral, the black arsenicon the surface of the SCR denitration catalyst is removed to the greatest extent, the original mechanical strength of the catalyst is not reduced, the loss of active components of the cleaned SCR denitration catalyst is reduced as much as possible, and certain anti-poisoning additives are implanted to enable the catalyst to have certain anti-black arsenic poisoning capability.

The invention provides an application of dendrobium polysaccharide in the preparation of drugs for prevention and treatment of reproductive injury caused by arsenic poisoning. The dendrobium polysaccharide has obvious therapeutic effect on reproductive injury induced by arsenic exposure in male rats, which can significantly increase the number and motility of sperms, increase the incidence of sperm acrosome reaction and decrease the rate of sperm deformity; the SOD activity, GPx activity, CAT activity and GSH content in testicular tissue are also significantly increased, while MDA content is also significantly decreased; the dendrobium polysaccharide has rarely toxic and side effects and no adverse effect on normal growth and physiological state. The dendrobium polysaccharide with wide source of raw materials is simple in extraction and purification method, high in sugar content and suitable for large-scale production and promotion and has a good prospect in the preparation and / or treatment of reproductive injury drugs caused by arsenic poisoning and clinical application.

Within the present invention discloses a methane-rich gas plasma synthesis process of hydrogen. According to the process, methane-rich gas is subjected to heat exchange with reaction high-temperature tail gas, and then is subjected to heat exchange with the wall of a plasma pyrolysis gasification reactor, and the obtained gas enters the plasma pyrolysis gasification reactor and acts with the plasma jet flow produced by a plasma generator to generate the gas adopting hydrogen gas as the main component. According to the present invention, the difficult problems that the traditional process requires the catalyst and the catalyst easily produces carbon precipitation, sulfur poisoning, halogen poisoning and arsenic poisoning are overcome, and the problems of the high energy consumption and the reactor wall protection during the plasma-to-hydrogen process are solved; and the process has characteristics of short process, simple operation, high thermal efficiency and low environmental pollution, and is suitable for the fuel gas chemical industry field and the plasma chemical industry field.

The invention discloses a food-grade anti-wrinkle age-defying lotion, made from materials in following percent by weight: 10-20 % of all-natural milk, 7-11 % of all-natural olive oil, 4-8 % of glycerol, 3-7 % of glycerol monostearate, 5-7.5 % of fresh Cacumen Platycladi, 3-4.5 % of fresh Herba Portulacae, 1-1.5 % of fresh Flos Rosae Rugosae 0.5-0.75 % of fresh Fructus Forsythiae, 0.2-0.3 % of Pulvis Margarita, 0.1-0.15 % of Herba Menthae, 0.1-0.15 % of Herba Lysimachiae, 0.05-0.075 % of Folium Isatidis, 0.05-0.075 % of Radix Glycyrrhizae, 2-4 % of all-natural honey, 1.5-3.5 % of stearic acid, 1-3 % of almond extract oil, 1-3 % of hexadecanol, 0.2-0.4 % of tween-80, 0.08-0.12 % of propylparaben, 0.1-0.3 % of methylparaben, 0.08-0.12 % of an essence, and the balance of distilled water; in the formulation, the fresh Herba Portulacae can promote local blood circulation of skin and expansion of pores, the fresh Fructus Forsythiae is effective in diminishing inflammation, clearing heat, arresting pain, suppressing viruses and inhibiting elastinase activity and has effects of clearing heat and toxicity and subsiding swelling and expelling pus, the fresh Fructus Forsythiae with the Pulvis Margarita can care the skin, and the fresh Fructus Forsythiae and the Pulvis Margarita may then be compatible with other medicinal materials in the formulation to enable the effects of removing lead, mercury and arsenic poisoning of the skin.

The invention provides an alkyne selective hydrogenation catalyst and a preparation method thereof. The alkyne selective hydrogenation catalyst comprises a titanium oxide-alumina composite oxide carrier and materials carried by the titanium oxide-alumina composite oxide carrier, wherein the materials comprise: by weight, 1 to 20% of copper, 0.05 to 3% of cobalt, 0.05 to 1% of one or more lanthanide metals, and optional zinc and / or nickel. In alkyne selective hydrogenation, the alkyne selective hydrogenation catalyst has high activity and high selectivity, can resist sulfur and arsenic poisoning, and has long action time. The alkyne selective hydrogenation catalyst is especially suitable for selective hydrogenation of alkynes of mixed C4 hydrocarbons.

The invention relates to a combined SCR (selective catalytic reduction) denitration catalyst with strong anti-poisoning capability and an application of the catalyst and belongs to the technical fieldof air pollution treatment. The combined SCR denitration catalyst with the strong anti-poisoning capability is a two-stage combined catalyst and comprises CePO / TiO2 and V2O5-WO3 / TiO2, wherein CePO and V2O5-WO3 are active components; TiO2 is a carrier and is a anatase crystal form; and a mass ratio of CePO / TiO2 to V2O5-WO3 / TiO2 is 3:1-1:3. Compared with the traditional vanadium-tungsten-titanium catalyst, the optimized combined catalyst can efficiently remove nitric oxide in a wider temperature interval and has stronger alkali resistance and anti-arsenic poisoning capability at the same time;the preparation cost of the denitration catalyst can be reduced; and the catalyst has a better industrial application value. The two-stage combined catalyst is also used for purifying nitric oxide intail gas of fixed combustion devices such as various coal-fired power plants and boilers as an integral SCR denitration catalyst, and has the better industrial application value.