38results about How to "Suitable for purification" patented technology

The invention provides a preparation method and application of a Cu-SSZ-13 catalyst. The preparation method comprises the following steps: 1) putting raw materials including a silicon source, an aluminum source, a template agent and seed crystals into a mortar, and grinding to form a uniform mixture; 2) feeding the mixture into a reaction kettle and crystallizing; after cooling, washing and drying, roasting to obtain an Na-SSZ-13 molecular sieve carrier; 3) preparing an ammonium nitrate solution, and adding into the Na-SSZ-13 molecular sieve carrier; after carrying out ion exchange, filtering, washing and drying to obtain an NH4-SSZ-13 molecular sieve; 4) preparing a copper nitrate solution and adding into the NH4-SSZ-13 molecular sieve; after carrying out ion exchange, filtering, drying and roasting to obtain the Cu-SSZ-13 catalyst. The Cu-SSZ-13 catalyst prepared by the preparation method has excellent NH3-SCR (Selective Catalytic Reduction) catalytic activity, N2 selectivity, hydrothermal stability, and H2O and SO2 positioning resisting properties, and is applicable to purification of tail gas of diesel vehicles.

The invention discloses a monolithic catalyst for simultaneously removing formaldehyde, carbon monoxide and ozone at room temperature, and relates to the fields of catalysis and environmental protection. The monolithic catalyst is characterized in that: honeycomb ceramics or porous foam metal is taken as a carrier; doped alpha-MnO2 which is supported first is taken as a first active ingredient; and platinum-gold with coexistence of an oxidation state and a metallic state, which is supported later, is taken as a second active ingredient. The doped alpha-MnO2 is characterized in that: silver in a metallic state and an oxidation state simultaneously exists in pores of which the size is about 0.46*0.46nm<2>, and titanium ions (Ti4+) replace partial lattices of the alpha-MnO2; and the Ag and Ti respectively account for 0 to 20 weight percent and 0 to 50 weight percent of the alpha-MnO2. The weight ratio of a platinum-gold alloy to the doped alpha-MnO2 is 0 to 10 percent, wherein the platinum accounts for 0 to 100 weight percent of the platinum-gold alloy. The monolithic catalyst can efficiently and stably remove the formaldehyde, carbon monoxide and ozone pollutants in air simultaneously in actual environment at normal temperature and normal pressure.

The invention relates to a method and device for efficiently removing organic matters in sewage by using periphyton. The method comprises the following steps: (1) design of spiral periphyton reactor; (2) spiral pipe pretreatment; (3) fixation process of periphyton; (4) design of periphyton treatment system; (5) design of integrated spiral periphyton reaction system; and (6) control of key environmental conditions. The device used by the method is an integrated spiral periphyton reaction system. The adsorption, absorption, biodegradation and other mechanisms of the periphyton are utilized and combined with the traditional precipitation and filtration processes to form the integrated spiral periphyton reactor. The device has the characteristics of high efficiency, small occupied area and high economic and environmental efficiency when being used for purifying organic pollutants in sewage or low-concentration low-C/N-ratio sewage.

The invention discloses a monolithic catalyst for removing carbon monoxide at room temperature, and relates to the field of catalysis and environmental protection. The monolithic catalyst is characterized in that: honeycomb ceramic or a porous foam metal is taken as a carrier, doped cryptomelane MnO2 which is loaded first is taken as a first active ingredient, and platinum-gold with coexisting oxidation state and metallic state which is loaded later is taken as a second active ingredient. The doped cryptomelane MnO2 is characterized in that: metallic state silver and oxidation state silver coexist in ducts with the dimensions of about 0.46*0.46nm<2>, and titanium ions (Ti<4+>) substitute partial lattice sites of the cryptomelane MnO2; and Ag and Ti account for 0 to 20 weight percent and 0 to 50 weight percent of alpha-MnO2 respectively. A platinum-gold alloy accounts for 0 to 10 weight percent of the doped cryptomelane MnO2, wherein platinum accounts for 0 to 100 weight percent of the platinum-gold alloy. The monolithic catalyst can efficiently and steadily remove carbon monoxide pollutants in the air in the normal-temperature normal-pressure real environment.

The invention relates to a method for preparing high-purity glycyrrhizic acid, comprising the following steps: (1) preparation of monoammonium glycyrrhizic acid, (2) preparation of crude glycyrrhizic acid, (3) polyamide column chromatography to remove key impurities 1 , (4) recrystallization to remove key impurity 2, (5) polyamide purification of glycyrrhizic acid. The characteristics of the present invention are: the present invention prepares high-purity glycyrrhizic acid, the column chromatography is efficient and convenient, and the separation capacity is large, which is suitable for complex sample separation and purification; polyamide and cation exchange resin can be regenerated and reused by simple methods, reducing costs, The equipment used is simple and suitable for industrial production; high-purity glycyrrhizic acid can be obtained through polyamide adsorption column purification. It has the following advantages: high product purity, the content of glycyrrhizic acid reaches more than 99.5 percent; the cation exchange resin and polyamide can be reused, and the cost is low; the operation is simple; the equipment investment is small, the environment is friendly, and it is suitable for industrial production.

The present invention provides a closed air purifying and washing device. The washing device comprises an air collecting system, a washing system, a settlement discharge system, a clean air delivery system and an automation control system. The washing system comprises a washing tank, a stirring shaft, a stirring paddle, an inner wall guide plate, a liquid level height equilibrium reflux tank, an air cap, a main motor, a reducer and a liquid turbidity window. The main motor, the reducer and the mixing shaft are coaxial; the air collecting system and the sediment discharge system are respectively connected to the bottom and the lower side wall of the washing system; a detergent rationing supply system is arranged on the top of the washing system; the clean air delivery system is connected to the top of the washing system; and a washing wastewater circulatory system is located on the inner upper part of the washing tank of the washing system. The detergent is supplied to the washing system through the detergent rationing supply system; and the washing wastewater circulatory system maintains stable and continuous operation of the washing system. The device has advantages of good treatment effect on polluted air, small amount of water consumption, simple structure and low cost.

The invention relates to the technical field of chemical engineering, in particular to a desulfurization and denitrification method. The desulfurization and denitrification method comprises the following steps: (1) preprocessing boiler smoke through smoke preprocessing equipment; (2) sending preprocessed smoke into a sprinkling tower by an induced draft fan, wherein absorption liquid is the mixedliquid of sodium chlorite and sodium hypochlorite; (3) discharging after the smoke is subjected to sprinkling, washing, foam absorption and filtering in the sprinkling tower; (4) pumping out the absorption liquid in a circulating pool, regularly sending to waste liquid processing equipment to be subjected to recovery processing. The desulfurization and denitrification method has the beneficial effects that wet-method desulfurization, denitrification and dust removal are integrated, the desulfurization and denitrification method is suitable for lower-temperature smoke purification, and investment is reduced; the sprinkling tower adopts four-level purification, including sprinkling, washing, foam absorption and filtering, desulfurization and denitrification efficiency is high, the dust removal efficiency of the desulfurization and denitrification method can be 96% or above, desulfurization efficiency can be 99% or above, and a purification effect is good; the sprinkling tower adopts spiral sprinkling purification, a liquid and gas mixing degree is high, reaction is sufficient, a liquid-gas ratio is low, L/Q is about 3, and purification efficiency is high.

The invention discloses a method for separating and purifying anti-allergic components in perilla leaves. The method comprises the steps that first, fresh perilla leaves are subjected to normal temperature shade dryness, crushing and sieving, solvent soaking and enhanced mass transfer method for extraction to obtain crude perilla anti-allergy components; then thin layer chromatography is used fordetermining an elution solvent, silica gel column chromatography and dextran gel column chromatography are used for purifying perilla anti-allergic crude extract components to obtain a high anti-allergic activity perilla extract with the hyaluronidase inhibition rate being as high as 89.76%. The method for separating and purifying the anti-allergic components in perilla leaves has the advantages of simple operation, less use time, high yield, significant activity and good reproducibility of results, and is suitable for the separation and purification of most plant active substances.

The invention discloses a multi-effect spraying agent special for an automobile air conditioner filter element and a preparing method thereof. The spraying agent is prepared from an inorganic nanometer active material, a dispersing agent, an aldehyde eliminating factor, an odor removing agent, a film forming agent and the balance deionized water. A mist spraying mode is adopted to make the spraying agent act on the surface of the air conditioner filter element, and a thin film formed by the film forming agent can firmly adhere to the surface of the filter element material in the situation of not influencing air flow and can rapidly dry; the aldehyde eliminating factor contained in the spraying agent slowly releases and can rapidly remove formaldehyde in air, the odor removing agent can beadopted to rapidly remove odors in an automobile, and the organic nanometer active material can be adopted to inhibit growing bacteria, molds and the like in humid air. The multi-effect spraying agentintegrates multiple effects, can directly and firmly act on the air conditioner filter element, rapidly remove aldehyde and odors and prevent the bacteria and the molds, is particularly suitable forpurifying the air environment inside the automobile, and can also greatly prolong the replacing period of the air conditioner filter element.

The invention provides a coordination polymer porous material MAF-49, a preparation method therefor and an application thereof. A chemical formula of MAF-49 is [Zn(batz)], wherein batz<2-> represents an anion obtained by deprotonation of a ligand H<2>batz with a formula of bis(5-amino-1H-1,2,4-triazol-3-yl)methane; the porous material MAF-49 is crystallized in a space group P3<1>21 in the trigonal crystal system, wherein a is equal to 9.6963 angstroms, and c is equal to 20.126 angstroms; and the MAF-49 is a three-dimensional framework structure with a one-dimensional channel, wherein the three-dimensional framework structure is formed by connecting the batz<2-> ligands and three four-coordination Zn<2+> ions. The porous material MAF-49 has the characteristics of good stability, high ethane adsorption capability and the like, can be used for collecting ethane in natural gas, purifying methane in landfill gas, and recycling ethylene in an ethylene epoxidation product, and also can be used for simply and conveniently separating an ethylene-ethane mixture with low energy consumption to obtain ethylene with a purity of 99.95%+. Therefore, the porous material MAF-49 has a very high industrial application value.

The invention belongs to the technical field of environmental protection, and particularly relates to a monolithic catalyst for removing benzene series at a low temperature, and a preparation method thereof. The monolithic catalyst is formed by firstly loading doped hollandite type MnO2, used as a first active component, on a honeycomb ceramic used as a carrier, and then loading silver-palladium used as a second active component. In the doped hollandite type MnO2, copper ions (Cu<2+>) replace a part of lattice sites of MnO2, and an alkali metal (K<+> or Na<+>) exists in pore channels with thesize of about 0.46 * 0.46 nm<2>; and a weight ratio of the Cu to the MnO2 is 0.5-10%, a weight ratio of the alkali metal to the MnO2 is 0.5-10%, a weight ratio of the silver-palladium alloy to the doped MnO2 is 1-10%, and a weight ratio of the silver to the silver-palladium alloy is 0-100%. The monolithic catalyst can be used for efficiently, stably and simultaneously removing various volatile organic pollutants at the low temperature.

The invention provides a distillation type sewage treatment device, which comprises a water sucking structure, a sewage container, an evaporation container, an electric heating wire, a steam guide pipe, a pure water container and a cooling container, wherein the evaporation container is arranged above the sewage container and connected with the sewage container by the water sucking structure; the water sucking structure can guide the sewage in the sewage container to the electric heating wire arranged in the evaporation container; the steam guide pipe is led out of the evaporation container to the pure water container; the pure water container is arranged in the cooling container filled with cold water; and the evaporation container is sealed except the part provided with the water sucking structure and the steam guide pipe. The treatment device can finish primary filtration and secondary filtration of the sewage at the same time so that the treated sewage reaches high purity; and the treatment device has a small volume and a simple structure, and is suitable for small-scale sewage purification.

The invention discloses a ground chestnut rhizopus culture medium and a preparation method thereof and relates to a rhizopus culture medium and the preparation method thereof. The ground chestnut rhizopus culture medium comprises the following components in mass percent: 5 to 25 percent of ground chestnut, 0.1 to 0.2 percent of chloramphenicol, 1.7 to 2.7 percent of agar, 0.2 to 0.5 percent of NaNO3, 0.2 to 0.5 percent of K2HPO4, 0.1 to 0.2 percent of KCl, 0.1 to 0.2 percent of MgSO4.7H2O, 0.1 to 0.2 percent of FeSO4, 1.5 to 2.5 percent of glucose and 68 to 91 percent of water. The preparation method comprises the following preparation processes: heating chestnuts with boiling water, airing and grinding into ground chestnut for later use; performing high temperature sterilization and cooling for later use; adding the components into a container in sequence and dissolving; heating until boiling, and then adding the agar; measuring the PH value of solution in the container to be 6.2(positive and negative 0.2); cooling to be lower than or equal to 42 DEG C for use. According to the ground chestnut rhizopus culture medium disclosed by the invention, by utilizing the characteristic that the ground chestnut is easy to powder and is rich in nutrition and by matching various inorganic salts, not only can biomass growth be ensured but also the growth of infectious microbes can be restrained.