173 results about "Iodide salt" patented technology

A method for converting a carbohydrate to a furan in a polar aprotic solvent in the presence of a chloride, bromide, or iodide salt or a mixture thereof and optionally in the presence of an acid catalyst, a metal halide catalyst and / or an ionic liquid (up to 40 wt %). The method can be employed in particular to produce furfural or 5-hydroxymethylfurfural.

A production process of acetic acid comprises a reaction step for continuously allowing at least one member selected from the group consisting of methanol, dimethyl ether, and methyl acetate to react with carbon monoxide in a catalyst system comprising a rhodium catalyst, an iodide salt, and methyl iodide in the presence of acetic acid and water in a plant compromising a reactor 1; a flasher 2; and a distillation column 3; wherein part of the vaporized stream is introduced into a heat exchanger 7. The process achieves a production of acetic acid with a high purity in a resource-saving and energy-saving equipment by efficiently removing a reaction heat even in a large-sized plant.

A process for removing amine compounds from a process stream derived from a carbonylation process. The amine compounds may be present as iodide salts. The process stream also contains corrosion metal contaminants. The amine compounds are removed by mixing a portion of the process stream a slipstream to form an aqueous stream having a water concentration of greater than 50 wt. %. The aqueous stream is contacted with an exchange resin to remove amine compounds, as well as corrosion metal contaminants.

A production process of acetic acid comprises a reaction step for continuously allowing at least one member selected from the group consisting of methanol, dimethyl ether, and methyl acetate to react with carbon monoxide in a catalyst system comprising a rhodium catalyst, an iodide salt, and methyl iodide in the presence of acetic acid and water in a plant compromising a reactor 1; a flasher 2; and a distillation column 3; wherein part of the vaporized stream is introduced into a heat exchanger 7. The process achieves a production of acetic acid with a high purity in a resource-saving and energy-saving equipment by efficiently removing a reaction heat even in a large-sized plant.

Processes for the production of acetic acid by carbonylation of methanol, and reactive derivatives thereof, in a reaction mixture using a rhodium-based catalyst system with at least one metal salt catalyst stabilizer selected from the group of ruthenium salts, tin salts, and mixtures thereof are provided. The metal salt stabilizers minimize precipitation of the rhodium metal during recovery of the acetic acid product, particularly in flasher units in an acetic acid recovery scheme. Stability of the rhodium metal is achieved even when the acetic acid is produced in low water content reaction mixtures in the presence of an iodide salt co-promoter at a concentration that generated an iodide ion concentration of greater than about 3 wt. % of the reaction mixture. The stabilizing metal salts may be present in the reaction mixtures for the production of acetic acid at molar concentrations of metal to rhodium of about 0.1:1 to about 20:1. The stabilizing metal salts may be combined with other catalyst stabilizers as well as catalyst promoters.

A corrosion inhibitor composition comprising one or more organic solvents, one or more corrosion inhibitor intermediates and about 0.1 to about 20 weight percent of one or more iodide salts dissolved in said composition and methods of using the corrosion inhibitor composition in acid fracturing and matrix acid stimulation of subterranean formations.

Acid-soluble cupric acetate may used in conjunction with potassium iodide to generate cuprous iodide (CuI) as an acid corrosion inhibition aid. A suitable corrosion inhibitor together with the aid protects steel surfaces in an acid environment, for instance, while acid fracturing or matrix acidizing subterranean formations. Cupric acetate monohydrate may be used with an alkali metal iodide salt such as potassium iodide or sodium iodide to generate cuprous iodide in situ in aqueous acid solutions. Use of cupric acetate provides a somewhat delayed reaction rate with potassium iodide to generate the desired product, cuprous iodide, which has very low solubility in acid systems. The method includes delayed and in situ production of cuprous iodide for enhancing performance of commercially available corrosion inhibitors, commonly referred to as intensifying the effect of the corrosion inhibitor (corrosion inhibitor intensifier or simply an intensifier).

The invention discloses a mirror reflection type electrochromic device and a preparation method thereof. The electrochromic device comprises transparent conducting glass, an insulating spacer, gel electrolyte, zinc oxide (ZnO) nanocrystallines and aluminum zinc oxide (AZO) transparent conducting glass. The preparation method comprises the following specific steps: directly growing the ZnO nanocrystallines on an AZO transparent glass electrode to form a coarse surface; uniformly mixing silver ion inorganic salt, bromide or iodide salt, auxiliary conducting ion inorganic salt and high-molecular polymer in organic solvent to from the transparent, stable and uniform gel electrolyte; using an encapsulating material to encapsulate the gel electrolyte between the transparent conducting glass with smooth surface and the AZO transparent conducting glass with coarse surface. The mirror reflection type electrochromic device has the advantages of simple technology and low cost, and large-area dimming devices with high reflectance, high transmittance and quick response capacity can be assembled.

There is provided a method of treating irritations and inflammation of the eye or ear by the topical administration of an aqueous composition containing an inorganic monobasic iodide salt and an oxidizing agent which is buffered to a pH of 4.0 to 8.0. The eye treating compositions have an osmolarity between 140 and 180 mOsm / l and are hypotonic.

A method produces acetic acid by continuously reacting methanol with carbon monoxide in the presence of a rhodium catalyst, an iodide salt, methyl iodide, methyl acetate, and water; and thereby producing acetic acid at a production rate of 11 mol / L·hr or more while keeping the acetaldehyde content of a reaction mixture to 500 ppm or less, in which the reaction is carried out at a carbon monoxide partial pressure in a gaseous phase of a reactor of 1.05 MPa or more and / or at a methyl acetate content of the reaction mixture of 2 percent by weight or more to thereby keep the production rate of acetaldehyde to 1 / 1500 or less that of acetic acid. This method can reduce production of by-products without reducing the reaction rate of acetic acid even at a low water content and a low hydrogen partial pressure in a reaction system.

The present invention provides a composite polyamide reverse osmosis membrane. The membrane includes a microporous support and a polyamide layer disposed over the microporous support, the polyamide layer including iodine atoms covalently bonded thereto. The membrane is preferably prepared by a process that includes the steps of providing a microporous support, forming a polyamide layer over the microporous support, and treating the polyamide layer with an aqueous solution comprising a compound, the compound comprising at least one iodine atom. Examples of the compound comprising at least one iodine atom include molecular iodine, iodine monobromide, iodine monochloride and iodine trichloride. The iodine-containing compound may be added to an aqueous solution and dissolved therein or may be formed in situ in the aqueous solution, for example, by adding to the aqueous solution an iodide salt and an oxidizing agent.

A method for converting a carbohydrate to a furan in a polar aprotic solvent in the presence of a chloride, bromide, or iodide salt or a mixture thereof and optionally in the presence of an acid catalyst, a metal halide catalyst and / or an ionic liquid (up to 40 wt %). The method can be employed in particular to produce furfural or 5-hydroxymethylfurfural.

In toothpaste, the addition of the Iodide ion by way of iodide salts, such as sodium iodide and potassium iodide, to a peroxide such as hydrogen peroxide in a basic medium yields free radical oxygen and water; generating large amounts of heat and depleting the Hydrogen Peroxide in a matter of minutes. The free radical oxygen generated in this reaction can be utilized to oxidize organic molecules that produce offending stains on select items, including artificial teeth and other dental appliances. Once the free radical oxygen has oxidized the offending molecule the color is lost and the solubility changes allowing any loose fragments of the offending molecule to be washed away in the solvent. The iodide ion catalyzes the reaction allowing for precise control over the speed at which the stain is removed without the need for other expensive, cumbersome energy adding equipment such as lights, lasers, heat sources, etc.

A method for preparation of iodizing agent for the use in the formulation of iodised salt that offers excellent stability of iodine in iodised salt is developed and the unrefined salt iodised with this compound was tested for its stability in presence of moisture, temperature and metal salts at higher temperature. The hydrotalcite type layered compound was used to prepare such compound and part of carbonate was substituted with iodate anion. The iodising agent exhibited excellent stability of iodine in iodised salt.

The present invention provides an efficient process for preparing N-alkylated opiates. In particular, processes are provided for using a chloride-containing alkylating agent and a bromide or iodide salt to alkylate the corresponding nor-opiate.

A carbonylation process for making acetic acid uses a metallic co-catalyst composition effective as a rhodium stabilizer and rate promoter at molar ratios of metal / rhodium of from about 0.5 to 30. A preferred process includes: (a) reacting methanol with a carbon monoxide feedstock in a rhodium-based catalytic reaction mixture having: (i) a rhodium catalyst metal, (ii) methyl iodide maintained from about 1 to 20 weight percent, (iii) a lithium iodide co-catalyst, (iv) a metallic co-catalyst composition, (v) water maintained from 0.1 weight percent to less than 8 weight percent, (vi) methyl acetate maintained from about 0.5 to about 30 weight percent, and (vii) acetic acid; (b) flashing crude acetic acid from the reaction mixture; and (c) purifying the crude acetic acid. This process achieves stability and a STY greater than 10 mol / L / hr, with substantially less than a theoretically equivalent inorganic iodide content corresponding to the metallic co-catalyst and lithium iodide.

A composite polyamide reverse osmosis membrane. The membrane includes a microporous support and a polyamide layer disposed over the microporous support, the polyamide layer including iodine atoms covalently bonded thereto. The membrane is preferably prepared by a process that includes the steps of providing a microporous support, forming a polyamide layer over the microporous support, and treating the polyamide layer with an aqueous solution comprising a compound, the compound comprising at least one iodine atom. Examples of the compound comprising at least one iodine atom include molecular iodine, iodine monobromide, iodine monochloride and iodine trichloride. The iodine-containing compound may be added to an aqueous solution and dissolved therein or may be formed in situ in the aqueous solution, for example, by adding to the aqueous solution an iodide salt and an oxidizing agent.

The invention provides a method for catalyzing decarboxylation of active carboxylic ester to introduce a nitrogen heterocycle through a photo-induced non-metal. According to the method, the decarboxylation of the active carboxylic ester is realized through light in the presence of a simple iodised salt, a phosphine ligand and an organic solvent, and the nitrogen heterocycle is introduced by a minisci reaction with a nitrogen-containing heterocyclic compound. The method provided by the invention utilizes photocatalysis to achieve high-efficiency catalytic conversion at room temperature, and ismild in reaction conditions and simple to operate; compared with previously reported conventional methods, the method avoids the use of precious metal catalysts and meets the requirements for developing green and environmentally-friendly chemistry, and substrates are wide in range and good in functional group compatibility; and the method can be successfully applied to gram-grade scale-up experiments, the conversion rate of reactions is high, and industrial synthesis value prospects can be achieved.

This invention relates to a veterinary antiseptic solution having three sources of iodine including elemental iodine, iodide salt and iodophor. The solution also includes at least one solvent such as alcohol, glycol or water. The solution is below the threshold concentration for elemental iodine of the List I controlled substances. The elemental iodine offers a rapid kill for bacteria. The iodophor offers lasting antibacterial properties. The iodide salt solubilizes elemental iodine and stabilizes the solution. The antiseptic solution forms a waterproof bandage with active antimicrobial properties when the alcohol dries.

Method and apparatus for producing molten purified crystalline silicon from low-grade siliceous fluorspar ore, sulfur trioxide gas, and a metallic iodide salt. Method involves: (1) initially reacting silicon dioxide-bearing fluorspar ore and sulfur trioxide gas in sulfuric acid to create silicon tetrafluoride gas and fluorogypsum; (2) reacting the product gas with a heated iodide salt to form a fluoride salt and silicon tetraiodide; (3) isolating silicon tetraiodide from impurities and purifying it by washing steps and distillation in a series of distillation columns; (4) heating the silicon tetraiodide to its decomposition temperature in a silicon crystal casting machine, producing pure molten silicon metal ready for crystallization; and pure iodine gas, extracted as liquid in a cold-wall chamber. The system is batch process-based, with continuous elements. The system operates largely at atmospheric pressure, requiring limited inert gas purges during batch changes.

The invention provides a bismuth oxyiodide photocatalyst and a preparation method and application thereof. The preparation method comprises the following methods: (1) dissolving bismuth salt in ethylene glycol to obtain a solution A, and dissolving iodide salt in methanol to obtain a solution B; (2) uniformly mixing and dispersing the solution A and the solution B, placing the mixture in a closedcontainer to react at 140-180 DEG C for 6-10 hours, and conducting cooling and separating to obtain a solid C; (3) alternately washing the solid C with an organic solvent and water, and conducting drying to prepare a powdery solid C; and (4) irradiating the powdery solid C under ultraviolet light to obtain the bismuth oxyiodide photocatalyst. The preparation method combines hydrothermal synthesisreaction in the closed container and irradiation under ultraviolet light to prepare the bismuth oxyiodide photocatalyst, and has the advantages of simple preparation method, low cost, no addition of any organic solvent, low reaction temperature, low requirement on devices, safety and environmental protection. The bismuth oxyiodide photocatalyst prepared by the method has more oxygen defects and high catalytic efficiency.

The invention relates to a method for preparing acetic acid through a catalytic carbonylation reaction, and mainly solves the problems of low stability of rhodium catalyst under the low water condition, low reaction activity when producing the acetic acid through low-water carbonylation, and short product oxidization time. Methanol or derivative of the methanol is adopted as a raw material, and is carbonylated with a liquid reaction composition to synthesize acetic acid; the reaction composition comprises the rhodium catalyst, a halogen promoter, methyl acetate, the acetic acid, water, a iodide-salt cocatalyst and a ruthenium complex used as a stabilizing agent, wherein the ruthenium complex is selected from at least one of [Ru(Co)aIb]n, Mn<+>[Ru(CO)aIb]<->n or Mn<+>[RuIb]<->n. The technical scheme solves the problems better, and can be applied in the industrial production of preparing the acetic acid through the catalytic carbonylation reaction.

The invention discloses an oat noodle and a production process thereof. The oat noodle is prepared from the following raw materials in percentage by weight: 8-15% of oats, 0.03-0.08% of iodised salts and 85-92% of flour. The production process of the oat noodle is implemented through the following steps of: cleaning hulled oats, drying the hulled oats by using a drying furnace, and crushing the dried oats into oat flour (120 meshes) by using a crusher; according to the weight percentages of the materials, putting the oat flour, the iodised salts, the flour and drinking water into a vacuum dough kneading machine to carry out dough kneading, then obtaining an oat dough, wherein the ratio of a mixture of the oat flour, the iodised salts and the flour to the drinking water is (4:1)-(6:1); conveying the prepared oat dough into a noodle forming machine to carry out wiredrawing and cutting, then conveying the obtained product into a heat-flow drying machine to dry at a temperature of 50-70 DEG C; and carrying out packaging on the dried product so as to obtain the oat noodle product. The noodle disclosed by the invention has the advantages that the noodle is high in nutritional value, high in medical care value, pliable, chewy, soft, and goluptious.

The invention relates to the field of salt processing, and discloses a device for adding iodine into crude salt. The device for adding iodine into crude salt comprises a frame, a single-shaft paddle-type continuous mixing mechanism arranged on the frame and a spray mechanism. The spray mechanism comprises sprayers. One end of the single-shaft paddle-type continuous mixing mechanism is higher than the other end. An outlet is arranged at the high end of the single-shaft paddle-type continuous mixing mechanism. A quantitative feed mechanism is arranged at the lower end of the single-shaft paddle-type continuous mixing mechanism. The sprayers are arranged between the outlet and the quantitative feed mechanism. Through the device for adding iodine into crude salt, crude salt and iodine can be mixed fully to form iodised salt having good iodine content consistency. The device for adding iodine into crude salt solves the problem that iodised salt produced by the existing iodised salt preparation device has poor uniformity and poor iodine content stability.

A gel electrolyte for a dye sensitized solar cell and a dye sensitized solar cell including the gel electrolyte. The gel electrolyte includes: a redox couple generated from a polymer-iodine complex and an iodide salt; inorganic nanoparticles; and a high-viscosity organic solvent.

The invention discloses whole potato flour and rose biscuits and a processing method thereof, and belongs to the technical field of food processing. The biscuits are prepared by processing the following raw materials in parts by weight: whole potato flour, potato starch, coarse cereals, low-gluten flour, rose petals, perilla herb oil, lactic acid bacteria, milk powder, prebiotics, sesame seeds, soybean oligosaccharides powder, xylitol, red jujubes, jujube kernels, white granulated sugar, baking powder and an appropriate amount of iodised salt. According to the whole potato flour and rose biscuits disclosed by the invention, potatoes are used as main raw materials, and the flour, the rose petals, the red jujubes and the like are matched, so that the taste of conventional biscuits is enriched, the nutrient components are increased, besides, the biscuits have the health care efficacies of strengthening the liver, nourishing the stomach, promoting blood circulation for regulating menstruation, nourishing bodies, soothing the nerves and the like, and a new thinking is provided for potato biscuits. In addition, the components of the prebiotics and the lactic acid bacteria are added, and the potatoes, roses and Chinese jujubes are matched, so that dietetic invigoration and internal regulation are combined, the health care effects of the whole potato flour and rose biscuits are better than those of single dietetic invigoration, the biscuits further have the efficacies of expelling toxins and nourishing faces, and the whole potato flour and rose biscuits are deeply loved by vast female consumers.

The invention provides a Bi5O7I nano sheet-shaped material, as well as a preparation method and application thereof, and relates to the technical field of semiconductor photocatalytic materials. The preparation method comprises: dissolving a bismuth-containing compound and iodide salt in ethylene glycol, adjusting the pH of the solution to 8-10, and performing hydrothermal reaction. The method issimple in preparation process, low in cost, strong in controllability, and suitable for large-scale production. The Bi5O7I nano sheet-shaped material is prepared from the preparation method of the Bi5O7I nano sheet-shaped material, and has good visible light sensing capacity and phenolic pollutant degrading capacity.

A process for the manufacture of iodopropynyl butylcarbamate (IPBC) is disclosed wherein the subject reaction is carried out in an aqueous solution of a suitable surfactant. The iodination reactant is metallic iodide salt which serves as a donor of I+ ions. The I+ ion is generated on an as needed basis, during the reaction sequence, hence the formation of undesirable isomers of IPBC are minimized. The process of this invention produces a highly purified IPBC having, preferably, a low moisture content (wet-cake). The IPBC produced by such a process is also disclosed herein.