77 results about "Free iodine" patented technology

A method and apparatus for producing bacteria-free iodine-species-containing drinking water for farm animals under continuous dynamic water flow, comprising dissolving solid iodine into a first water flow to produce a saturated iodine species-containing aqueous solution at a pre-selected temperature; blending the saturated solution with a second water flow to produce a diluted iodine species bacterium-free aqueous solution; and providing the diluted solution as drinking water to the animals. Preferably, the iodine is dissolved in the first water flow to provide a saturated iodine species at a pre-selected temperature at a known concentration, which saturated solution is then blended into a mean water flow. The continuous flow of iodine species-containing water is fed to a farm animal drinking water distribution network with reduced risk of back-contamination by bacteria-containing water through the network. Other uses of the iodinated water are as a disinfectant, for example, in the food processing industry; fruit, vegetable and fish preservation; industrial, commercial cooling tower waters, sewage and waste water treatment; and as a nutrient as an iodine source for humans, livestock, fish and plants.

The invention relates to a preparation method of a stable iodized plant oil fatty acid ethyl ester, which firstly puts the plant oil into ester exchange reaction with alcohol with the effect of salt catalyst so as to produce plant oil fatty acid ethyl ester which is then put into addition reaction with hydrogen iodide to produce the iodized plant oil fatty acid ethyl ester, then heating and air ventilating methods are used for eliminating unstable iodine being combined in the iodized plant oil fatty acid ethyl ester, and lopsidedness sodium sulfite solution is used for liquid seal of the separated free iodine so as to obtain the iodized plant oil fatty acid ethyl ester with good stability; the preparation method is characterized by small viscosity, good stability and low cost.

The invention discloses gynecologic gel with antibacterial restoration activity and a preparation method thereof. The gynecologic gel is polyamino polysaccharide polypeptide complex iodine compound bioactive glass gel which is formed by taking a chitosan iodine solution and a bioactive glass as main active components, carbomer and sodium alginate as adhesives and gelatin as a shaping agent and has an antibacterial restoration function, wherein the chitosan iodine can not only kill pathogen by providing free iodine, but also promote the healing of a wound tissue part, the bioactive glass is permeated through the soakage of a human body fluid, and the surface activity of the bioactive glass can promote the generation of a growth factor positioned on the wound tissue part and promote cell proliferation after contacting with a wound tissue. The gynecologic gel disclosed by the invention can not only kill the pathogen by providing the free iodine, but also promote the healing of the wound tissue part, has good biocompatibility and is plastic gel which can be used for treating gynecological inflammation and has antibacterial restoration activity. The preparation method disclosed by the invention is simple, convenient and suitable for industrialized production.

The invention relates to a method for preparing stable iodized vegetable oil and iodized vegetable oil fatty acid ethyl ester, which includes the following steps: first, vegetable oil and iodized hydrogen gas are caused to take addition reaction so as to generate iodized vegetable oil; then, the unstably combined iodine in iodized vegetable oil is removed by heating and ventilating air method, and the removed free iodine is eliminated by using lopsidedness sulfite solution liquid sealing, thus getting the iodized vegetable oil with good stability; the stable iodized vegetable oil and ethanol are caused to take transesterification reaction under the effect of salt catalyst so as to generate the stable iodized vegetable oil fatty acid ethyl ester. The product prepared by the method for preparing stable iodized vegetable oil and iodized vegetable oil fatty acid ethyl ester has the advantages of low viscosity, good stability and low cost.

A water chloramination control system compares the concentration of aqueous higher chloramines to aqueous ammonia to optimize the ratio of added ammonia to chlorine. Aqueous ammonia concentration is measured by conversion to monochloramine which concentration is determined spectroscopically. Higher chloramine concentration is measured by a reaction producing free iodine which concentration is also determined spectroscopically. The higher chloramine to ammonia ratio is used to control ammonia feed to the water. Problems associated with excess chlorine, or excess ammonia, are avoided.

The invention relates to a method for measuring the peroxide value in microcapsule products by volumetric method. That is, after the oil to be tested is extracted by breaking the wall, the peroxide in the oil reacts with potassium iodide to generate free iodine, which is titrated with sodium thiosulfate and the content is calculated. Adopt the method of the present invention to detect the peroxide value in the microcapsule product, fast and effective, the relative average deviation is less than 5%, thus it can be seen that the method of the present invention provides a reliable method for the detection of the peroxide value in the microcapsule product The method is easy to implement and can meet the needs in research and production.

The invention relates to a drinking water terminal sterilizing water purifier which includes a tube body, a water inlet and a water outlet. The water inlet and the water outlet are arranged on two ends of the tube body, in which a sterilizing layer, a water purifying later and a heavy metal ion removing layer are successively arranged from the water inlet to the water outlet in a laminating manner, wherein the sterilizing layer is composed of a high-polyiodinate resin, the water purifying later is composed of granular active carbon and active carbon fibers, and the heavy metal ion removing layer is composed of heavy metal nano-spherical particle and cation exchange resin. In the sterilizing layer, the high-polyiodinate resin can instantly kill various bacteria and viruses harming human health in water within 0.5 s and is free of generating bacteria and secondary pollution in itself. Under the same sterilizing effect, compared with a conventional water purifier structure, the sterilizing water purifier is greatly simpler. The water purifying later can neutralizing and adsorbing free iodine in water, can removing organic pollutant and residual chlorine in water, and can improving mouthfeel of water. The heavy metal ion removing layer can effectively remove heavy metal ions in water and reduce hardness of water. The sterilizing water purifier is not liable to be blocked, is long in service life and can be matched with other filtering methods.

The invention discloses a production method of ammonium iodide, comprising the following steps of: (1) reacting hydroiodic acid with ammonia water to generate an ammonium iodide solution; (2) heating to concentrate the ammonium iodide solution generated from the step (1) under an ordinary pressure, and stopping heating when concentrating till crystals are to appear; (3) dripping a hydrazine hydrate solution to the ammonium iodide solution so that the ammonium iodide solution is changed from orange red to white; (4) continuously heating to concentrate till white ammonium iodide crystals appear; and (5) filtering the crystals, and drying at a low temperature. According to the production method disclosed by the invention, direct heating and concentration are carried out under the ordinary pressure, the hydrazine hydrate reacts with precipitated free iodine to generate the ammonium iodide, therefore, not only is the production efficiency improved, but also the yield rate of products is enhanced.

A kit for determining residual chlorine or chloramine amount of a sample; comprising: a means for containing a PVA solution as an indicator, and another means for containing a reducing indicator. Said reducing indicator would be oxidized by a reaction with residual chlorine or chloramine and said PVA indicator induces a dye by reaction with oxidized compound such as free iodine; wherein intensity of said dye would be changed depending upon the residual chlorine or chloramine amount of the sample.

The invention relates to a preparation method of iodinated oil with stable quality and belongs to the technical field of organic synthesis. The preparation method is characterized in that vegetable oil is frozen at -10-10 DEG C to remove low-iodine substances such as wax and saturated fat before the vegetable oil and hydrogen iodide gas carry out additive reaction. The special treatment aims at removing the low-iodine substances such as the wax and the saturated fat to facilitate an increase in an iodine value of the oil, further improving bound firmness of the iodinated oil to bound iodine (improving stability of organic iodine), and reducing precipitation and color deepening of free iodine.

A method and apparatus for producing bacteria-free iodine-species-containing drinking water for farm animals under continuous dynamic water flow, comprising dissolving solid iodine into a first water flow to produce a saturated iodine species-containing aqueous solution at a pre-selected temperature; blending the saturated solution with a second water flow to produce a diluted iodine species bacterium-free aqueous solution; and providing the diluted solution as drinking water to the animals. Preferably, the iodine is dissolved in the first water flow to provide a saturated iodine species at a pre-selected temperature at a known concentration, which saturated solution is then blended into a mean water flow. The continuous flow of iodine species-containing water is fed to a farm animal drinking water distribution network with reduced risk of back-contamination by bacteria-containing water through the network. Other uses of the iodinated water are as a disinfectant, for example, in the food processing industry; fruit, vegetable and fish preservation; industrial, commercial cooling tower waters, sewage and waste water treatment; and as a nutrient as an iodine source for humans, livestock, fish and plants.

The invention discloses a preparation used for controlling vibrio number in water, and a preparation method and an application method thereof. The bactericide is composed of high-concentration bdellovibrio bacteriovorus original powder with a concentration higher than 3.3billion/g, bacillus amyloliquefaciens microcapsule with a concentration higher than 2billion/g, and soluble starch with an effective content higher than 99%. A mass ratio of the high-concentration bdellovibrio bacteriovorus original powder to the bacillus amyloliquefaciens microcapsule to the soluble starch is 4:2:3. According to the preparation used for controlling vibrio number in water, the main components are bdellovibrio bacteriovorus and bacillus amyloliquefaciens. The action mechanism is that vibrio can be cracked and inhibited fast. Compared to chemical agents such as povidone-iodine which is used for killing bacteria through releasing free iodine and breaking bacterial cell metabolism, the preparation is safer and more environment-friendly. With the preparation, secondary pollution is prevented, and vibrio drug resistance is prevented.

A method of treating alginic acid to produce polyguluronic acids. The method involves: (a) mixing the alginic acid with water and lithium hydroxide in respective amounts sufficient to form a reaction mixture that is an acidic solution comprising at least 5 wt % of the alginic acid; (b) treating the reaction mixture, with addition of a periodic acid or a periodate salt, to effect an oxidation of the alginic acid that results in formation of (i) an oxidized product that, upon acidifying and heating, hydrolyzes into a plurality of components including polyguluronic acids that are substantially free of mannuronic acid contamination, with the polyguluronic acids having an average degree of polymerization of less than 20; and (ii) free iodine; (c) separating the free iodine from the reaction mixture; (d) acidifying and heating the reaction mixture to hydrolyze the oxidized product into the plurality of components; (e) adjusting the pH of the reaction mixture to form a precipitate of the polyguluronic acids; and (f) recovering the precipitate. There is also disclosed a method of treating alginic acid using steps (a), (b) and (c) to form concentrated solutions for use in producing polyguluronic acids.

The invention relates to a formula of hand-washing-free efficient disinfection gel, and belongs to the technical field of disinfection product preparation. The formula is characterized in that povidone iodine is used as a solute, and glycerol, n-propanol and ethanol are used as solvents. The povidone iodine can be dissolved in alcohols, and 1.0-20 ppm of free iodine can be released; the viscosityof the disinfection gel can be changed by adjusting the ratio of the glycerol, the n-propanol and the ethanol; the sorbitan fatty ester can emulsify the glycerol, so that the glycerol, the n-propanoland the ethanol are mutually soluble; the glycerol has a moisturizing effect, so that the killing and inhibiting action time of iodine on pathogenic microorganisms is prolonged; the ethanol volatilizes quickly and has a quick-drying effect; and triton-100 can penetrate through the surface of a cell membrane, so that free iodine enters parasitic cells of the virus to achieve the effect of killing the virus. The gel has the advantages of being convenient to use, free of hand washing and capable of effectively killing bacteria and viruses.

The invention discloses a method capable of rapidly measuring biochemical oxygen demand in water, which comprises dissolving anhydrous calcium chloride in water; dissolving ferric chloride in water; and dissolving glucose and glutamic acid in water after drying; Put a certain amount of water in the glass bottle, control the water temperature, aerate the water with an oil-free air compressor or membrane pump, take 100mL of neutralized water sample, add 1+1 acetic acid 10mL, 10% potassium iodide solution 1mL , using starch solution as indicator, titrate free iodine with sodium sulfite standard solution, and calculate the amount of sodium sulfite solution needed in the water sample according to the volume and concentration of sodium sulfite standard solution consumed; Inside, use the siphon method to add part of the dilution water, and then add the amount of water sample calculated according to the volume of the bottle and the dilution ratio. In the BOD5 measurement, the sodium azide correction method is used to measure the dissolved oxygen. The method has the advantages of simple and convenient measurement process, less procedures, accurate measurement results and high efficiency, and can meet the development needs of enterprises.

The invention discloses a quaternary ammonium salt polyphosphazene hydrogel wound dressing with active and passive dual antibacterial mechanisms and a preparation method. The hydrogel wound dressing is obtained by free radical copolymerization of hydrophilic polyphosphazene containing quaternary ammonium salt functional groups and hydrophilic 1-vinyl-2-pyrrolidone in the presence of an initiator. The hydrogel wound dressing realizes passive contact antibacterial through cationic quaternary ammonium salt functional groups in a cross-linked skeleton, and a hydrogel network capable of being complexed with free iodine in the skeleton realizes free iodine loading and long-acting drug release; and the hydrogel wound dressing can realize the antibacterial purpose, has good swelling property, and has relatively high mechanical strength and relatively low hemolysis rate.

The invention is concerned with a pharmaceutical and industrial iodophor preparation, its synthesis and potential applications. The compound has predictable antimicrobial activities. Furthermore, this iodophor is much more stable in the presence of organic material than traditional iodophors. The compositions release free iodine when in solution, which provides the antimicrobial activity.

The invention provides an iodine disinfection solution and a preparation method thereof, the iodine disinfection solution comprises the following components in parts by weight: 0.1-3 parts of iodine, 5-20 parts of organic acid, 0.05-3 parts of potassium iodide, 1-15 parts of a solvent, 1-20 parts of a disinfection enhancer and the balance of purified water, and the preparation method of the iodine disinfection tablet comprises the following steps: (1) dissolving potassium iodide with 1-2 times of purified water; (2) adding iodine for dissolving; (3) adding a solvent, a disinfection enhancer, organic acid and the balance of purified water; (4) and uniformly stirring to obtain the iodine disinfection solution. Organic acid and iodine are combined, the acidity of the iodine disinfection solution is improved, free iodine is increased, and the sterilization effect is improved. In addition, the disinfection synergist is also added, so that the disinfection wetting effect is improved, the activity of the iodine disinfection solution is improved, and the stability of the product is improved.

The invention relates to a device for drying lithium iodide and a preparing method of the lithium iodide. The device comprises an electric jacket, a flask, a vacuum pump, an argon bottle and a vacuumpressure meter. The flask is arranged in the electric jacket, the flask is a three-connector flask, three connectors comprise the first connector, the second connector and the third connector, and thefirst connector, the second connector and the third connector are in seal connection with the argon bottle, the vacuum pressure meter and the vacuum pump through pipelines. The three-connector roundbottom glass flask is selected as the flask, trihydrate lithium iodide is subjected to vacuum drying in the flask, cost is reduced, rapid joints are arranged between the flask and the vacuum pump andbetween the flask and the argon bottle, the preparing process is more convenient and rapid, the lithium iodide prepared through the method effectively reduces the content of free iodine, and the waterand the free iodine reach the quality need, and are both lower than 0.02%.

The invention discloses a high-purity grade diiodomethane purifying method used for photovoltaic material used for a photovoltaic material. The method comprises the following steps: 1)an industrial grade diiodomethane raw material is absorbed by passing through an adsorption column equipped with modified 2-acrylamide-2-methul propanesulfonic acid copolymer medium to obtain a filtrate; 2)passing a filtrate through a quartz purification and rectification apparatus, under vacuum condition, removing preceding fraction, collecting a distillation fluid; and 3)filtering and processing the distillation fluid to obtain the high-purity grade diiodomethane used for photovoltaic material. According to the invention, the modified 2-acrylamide-2-methul propanesulfonic acid copolymer medium is employed for column adsorption, and has strong adsorption capability to impurity ions in a solution, and has strong adsorption capability to hydroxy impurity, free iodine, moisture, and metal ions in industrial grade diiodomethane, and impurity can be effectively removed. According to the invention, the purifying process operation is simple, cost is reduced, yield is increased, and the obtained product quality is stable.