304 results about "Ethylene Dibromide" patented technology

Decontamination formulations for neutralization of toxic industrial chemicals, and methods of making and using same. The formulations are effective for neutralizing malathion, hydrogen cyanide, sodium cyanide, butyl isocyanate, carbon disulfide, phosgene gas, capsaicin in commercial pepper spray, chlorine gas, anhydrous ammonia gas; and may be effective at neutralizing hydrogen sulfide, sulfur dioxide, formaldehyde, ethylene oxide, methyl bromide, boron trichloride, fluorine, tetraethyl pyrophosphate, phosphorous trichloride, arsine, and tungsten hexafluoride.

The invention relates to a continuous heterogeneous catalyst and a process for synthesizing ethylene carbonate through continuous heterogeneous catalysis. The ethylene carbonate is prepared through carrying out a catalytic addition reaction on a packed bed reactor device by taking ethylene oxide and carbon dioxide as raw materials and taking a novel functional ionic liquid polymer adsorbed on an inorganic particle as a solid catalyst. The catalyst is prepared by stirring and coating a functional imidazolium ionic liquid polymer on an inorganic carrier. The ethylene carbonate is prepared by mixing ethylene oxide and the carbon dioxide by using nitrogen gas as carrier gas in the packed bed reactor device and carrying out a cyclic addition reaction under the action of the catalyst, wherein the reaction pressure is 1.0-6.0MPa, the reaction temperature is 80-150 DEG C, and the reaction time is 1-6h. The continuous heterogeneous catalyst and the process for synthesizing ethylene carbonate through continuous heterogeneous catalysis have the advantages that the method with a continuous process is simple in operation, low in cost, free of separation and distillation and suitable for large-scale industrial production; and the catalyst has high activity, low loss, high ethylene oxide conversion ratio up to 97% and high electivity up to 98%.

The invention relates to a waste gas treatment system and in particular relates to an ethylene oxide waste gas recycling treating system. The ethylene oxide waste gas recycling treating system comprises a gas-liquid separator (1), an atomizing cabinet (2) and a water collection tank (3) which are sequentially connected with one another by virtue of a pipeline, wherein N filler purifying absorbing towers (7) used for absorbing ethylene oxide are sequentially arranged inside the water collection tank (3); filler layers are arranged inside the filler purifying absorbing towers (7); pipelines connected with the water collection tank are arranged at the top ends of former N-1 filler purifying absorbing towers (7); an active carbon solid acid layer (8) is arranged at the upper part of the filter layer of the Nth filler purifying absorbing tower (7). According to the ethylene oxide waste gas recycling treating system, the ethylene oxide is cooled firstly and is in relatively well contact with water vapor, then ethylene glycol within a wide application range is generated by the ethylene oxide in a multistage absorbing tower, finally the ethylene oxide is adsorbed and converted again by active carbon solid acid, so that the emission amount of the ethylene oxide is minimized.

The present invention discloses a recycling method of ethylene oxide-containing organic waste gas. The specific technical scheme comprises that: ethylene oxide in ethylene oxide-containing organic waste gas is subjected to circulation absorbing in a hydrolysis tower by using dilute sulfuric acid with a certain concentration as an absorbent so as to produce a hydration reaction to generate ethylene glycol, the ethylene glycol is conveyed into an ethylene glycol solution storage tank after the ethylene glycol in the solution achieves a certain concentration, a sodium hydroxide solution is added to neutralize, one part of the neutralized ethylene glycol solution is used for the acid gas washing process, the other part is conveyed to the product separation and recovery, the tail gas discharged from the hydrolysis tower enters a reactor to carry out deep oxidation, an acid gas washing treatment is performed, the treated standard tail gas is discharged into the atmosphere, and the absorbing liquid is recycled to the ethylene glycol solution storage tank. According to the present invention, the method has characteristics of short process and simple operation, and with the treatment of the present invention, the ethylene oxide content in the organic waste gas tail gas does not exceed 1 ppm, and a certain amount of the ethylene glycol solution is recovered so as to achieve the resource utilization of the waste gas.

The invention relates to saturated cardanol polyoxyethylene ether and a preparation method thereof, which belongs to the technical field of organic synthesis, and the structural formula of the saturated cardanol polyoxyethylene ether is as follows, wherein n=2-30. The preparation method comprises the following steps: performing a hydrogenation reaction of cardanol; performing filtration and distillation, and performing an addition reaction with ethylene oxide; adjusting the pH value, filtering, and performing reduced-pressure distillation; or performing an addition reaction of cardanol and ethylene oxide; adjusting the pH value, filtering, performing a hydrogenation reaction, filtering, and performing reduced-pressure distillation. The preparation method of the invention uses cardanol as a raw material, and prepares cardanol polyoxyethylene ether with different ethylene oxide adduct numbers and saturated side chains; the product does not contain mixed unsaturated double bond structures, has surface activity, and has stable using performance.

The invention discloses an ethylene oxide waste gas absorption coupling catalytic reaction purification device and process. High-concentration ethylene oxide waste gas is absorbed by several-level absorption spray tower water, remaining waste gas is emitted on standard, ethylene oxide water solution collected by an absorption spray tower kettle enters a hydration reactor to perform ethylene oxidehydration reaction to generate high-concentration ethylene glycol, part of ethylene glycol water solution reflows into the tower kettle after reaction, clear water is added, the ethylene glycol watersolution continues to serve as ethylene oxide waste gas absorption solution to be used, and parts of reaction products returns to an ethylene glycol water solution storage tank to be recycled. According to the process, absorption and reaction are divided into two portions of an independent unit, the absorption efficiency of a whole process is high, operation processes are simple, energy consumption is low, resource utilization of the absorption solution is achieved, occupied area is small, operation is simple, integrated operating cost is low, safety is high, emission of waste liquid is omitted, and the process is applicable to control of ethylene oxide waste gas of various large and small sterilization enterprises.

The invention discloses a method for restoring soil compositely polluted by heavy metals and organics by using a transgenic plant and is technically characterized in that foreign genes which can strengthen the efficiency for restoring the organic pollution of the plant and foreign genes which can improve the tolerance and the accumulation to a plurality of metals of the plant are introduced to the plant so as to establish a transgenic plant which has a better restoring effect on the pollution by the heavy metals and the organics. The method of the invention has a better restoring effect on the polluted soil of the three types as follows: (1) the soil polluted by organic pollutants of halohydrocarbon compounds such as trichloroethylene, dibromethane, and the like; (2) the soil polluted by various heavy metals such as Cd, Cr, Cu, Mn, Zn and Pb; (3) the soil compositely polluted by the heavy metals and the organics. In addition, the method of the invention comprises the procedures of establishing the transgenic plant, the screening and cultivation of light-demanding plants and the restoring of polluted soil by the transgenic plant. The method of the invention has broad application prospect in the restoring of the soil compositely polluted by the heavy metals and the organics.

The invention provides a paraffin emulsifier and its making method, wherein the emulsifier comprises lauryl alcohol, ethylene oxide, monoester, stearinic acid and ethanol, and solid or grease form ceresin wax emulsifying agent can be obtained through reaction in common autoclaves.

The invention discloses a production method for preparing propylene (ethylene) carbonate from carbon dioxide and propylene oxide (ethylene oxide) through tubular reaction. The production method comprises the following steps: feeding a catalyst and propylene oxide (ethylene oxide) mixture liquid and carbon dioxide dispersed in circulating propylene (ethylene) carbonate into a tubular propylene (ethylene) carbonate synthesis reactor (3) in parallel, and mixing to react when flowing; taking out the reaction heat by using an outer jacket of the tubular propylene (ethylene) carbonate synthesis reactor (3); adjusting the amount of a cooling medium inside different tube sections of the tubular propylene (ethylene) carbonate synthesis reactor (3) to obtain appropriate reactor axial temperature distribution; feeding crude propylene (ethylene) carbonate discharged from the tubular propylene (ethylene) carbonate synthesis reactor (3) into a gas-liquid separator (4), releasing excessive carbon dioxide, and subsequently feeding into a propylene (ethylene) carbonate separation and refining device (5), thereby obtaining a product, that is, propylene (ethylene) carbonate. The production method is excellent in mass transfer and heat conduction effect, the reaction heat can be removed in time, and the production process is stable, easy to control and convenient to operate.

A process for removal of ethylene oxide (EO) from ambient air laden with EO is passed through a zeolite-based removal media, which preferrably consists of the acid form of zeolite ZSM-5, herein referred to as “H-ZSM-5.” The process described herein may be applied to many forms, configurations and uses, such as, for example, gas masks, fume hood ventilation filters, cartridge filters, etc. Preferably, the H-ZSM-5 is configured within an apparatus in such a manner that the stream containing EO is brought into sufficient contact with the zeolite to remove the EO from the airstream.

The invention discloses a method and device for quickly desorbing ethylene oxide. An indirect heating method is adopted, the temperature is controlled to be 15 DEG C to 80 DEG C, and cylic heating and vacuumizing on inert gas in the device are alternately conducted. The device is mainly formed by connecting a desorbing cabinet, a heater, a heat conduction pipe, a circulating fan, a temperature measuring controller, a three-way valve and an exhaust gas treatment device through pipelines; work of the heater is controlled by the temperature controller and linked with work of the circulating fan, a gas distributor is installed in the desorbing cabinet, desorbed gas is treated by the exhaust gas treatment device and then exhausted, and therefore the purpose of quickly and safely desorbing ethylene oxide is achieved.

The medical collagen material is made through the processes of chondroitin sulfate crosslinking, high temperature vacuum drying and ethylene oxide. Is has stable molecule structure and better anti-seepage and anti-stick performance, and is used in repairing cerebral dura mater, spinal dura mater and peripheral nerve.

The invention discloses a polyurethane composition for glass fiber reinforced honeycomb sandwich panels and an application method of the polyurethane composition. The polyurethane composition comprises a component A and a component B; the component A comprises 40-70% of polyether polyol 1, 5-10% of polyether polyol 2, 5-10% of polyether polyol 3, 0-10% of polyester polyol 1, 4-10% of crosslinkingagents, 5-15% of chain extenders, 0.2-2% of foam stabilizers, 0.2-1.5% of catalysts, 5-10% of flame retardants, 0.2-1% of water, 0.2-2% of internal releasing agents and 0.2-1% of other additive; the component B comprises polyaryl polymethylene isocyanate; the polyether polyol 1 is prepared by taking D-glucitol as an initiator and alkali metal hydroxide as a catalyst, performing anionic polymerization on 1,2-propylene oxide and adding ethylene oxide for terminating; the polyether polyol 2 is propylene oxide polyether polyol with the functionality being 2, and is prepared by taking bisphenol A as an initiator; the polyether polyol 3 is prepared by taking glycerol as an initiator and is terminated by ethylene oxide; the polyester polyol 1 is obtained by polycondensation reaction between terephthalic acid and ethylene glycol.

Water-based chemical indicator inks for ethylene oxide sterilization processes and methods for its use. The chemical indicator ink contains at least one pH indicator dye selected from the group consisting of Bromocresol green, Bromophenol blue, Methyl red, Ethyl orange, and combinations thereof. The pH indicator dye undergoes an irreversible color change when exposed to ethylene oxide vapor in the presence of low-temperature steam, but when exposed to other sterilization processes either does not undergo a color change or undergoes a color change that is different than is obtained when exposed to ethylene oxide.

The invention belongs to the technical field of synthesis of polyether and particularly relates to antioxidant polyether polyol and a preparation method thereof. The antioxidant polyether polyol is prepared from the following raw materials in parts by weight: 200-600 parts of an initiator, 1-5 parts of a catalyst, 112-520 parts of propylene oxide and 238-1100 parts of ethylene oxide, wherein the initiator is o-phenylenediamine and sorbitol. The preparation method comprises the following steps: dissolving the initiator and the catalyst until a homogeneous phase is formed, displacing, heating, dropwise adding propylene oxide and ethylene oxide and reacting to obtain crude polyether polyol; washing crude polyether with water, neutralizing, adsorbing, drying and filtering to obtain the finished product, namely, polyether polyol. The polyether polyol prepared by the preparation method disclosed by the invention has good antioxidant effect, the amount of the antioxidant is reduced, the production steps are simplified, the benefits are increased and the range of source of raw materials is wide; the preparation method is scientific, reasonable, simple and feasible.

The invention discloses a chemical structure modification-based water-soluble curcumin dye. The invention also discloses a preparation method of the chemical structure modification-based water-soluble curcumin dye. The preparation method comprises the following steps: reacting curcumin with 1,2-dibromoethane, and reacting the above obtained product with triethylamine to obtain the chemical structure modification-based water-soluble curcumin dye. The invention also discloses an application method of the chemical structure modification-based water-soluble curcumin dye. The dye can be directly used for dyeing unmodified cotton fabrics without a dyeing accelerant, a dye leveler or a dye mordant, so the environmental protection property of a dyeing process and the safety of the fabric are improved. All dyeing indexes, especially the indexes comprising the washing color fastness and the like of the water-soluble dye are obviously better than that of natural curcumin for direct dyeing, wherein the washing color fastness reaches 3 level, the staining fastness reaches 5 level, and each of the dry crock fastness and the wet crock fastness reaches 5 level.

The invention provides a preparation method of novel isopropanolamine. The preparation method comprises the following steps: (1) preparing a catalyst; (2) preparing diethanol amine; (3) synthesizing diethanolisopropanolamine. In the method, liquid ammonia, ethylene oxide and propylene oxide are taken as raw materials, and the diethanolisopropanolamine is synthesized in two steps; when the liquid ammonia and the ethylene oxide are used for synthesizing the diethanol amine, a molecular sieve catalyst is adopted, so that the generation of triethanolamine is inhibited effectively, the production of monoethanolamine is reduced by increasing the molar ratio of ethylene oxide to the liquid ammonia, the yield of the diethanol amine is increased, and the yield of the diethanolisopropanolamine is increased. Since byproducts in a final product are all alcohol amine substances which can be used directly in the production of a cement grinding aid, thereby simplifying the production process and lowering the production cost.

The invention discloses a method for preparing an antimicrobial polymer separation membrane, which comprises the following steps of: (1) selecting a polymer separation membrane containing a dimethylaminoethyl methacrylate surface modification layer as a basement membrane; and (2) soaking the basement membrane in aqueous solution of silver nitrate and aqueous solution of sodium borohydride in turn, taking out, soaking in cross-linking agent solution for quaternization and in-situ cross-linking reaction, taking out, cleaning, and drying to obtain the antimicrobial polymer separation membrane, wherein a reducing agent is sodium borohydride or sodium ascorbate; and a cross-linking agent is on ore more of alpha,alpha'-dichloro-p-xylen, 1,2-dibromoethane, 1,3-dibromopropane, and 1,4-dibromobutane. The polymer separation membrane prepared by the method fully utilizes the antibacterial performance of silver nanoparticles and quaternized dimethylaminoethyl methacrylate, and has excellent antimicrobial effect.

The invention provides a rubber product with a low volume intrinsic resistance value, a small compression permanent deformation, no toxic gas generated during product burn-off after use, and no adverse effects on the environment. The conductive rubber composition of the present invention comprises a copolymerization ratio of ethylene oxide/propylene oxide/allyl glycidyl ether of 50-95 mole %/1-49 mole %/1-10 mole %, number average molecular weight Ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer (A) and nitrile rubber (B) with Mn above 10000, according to (A):(B)=70:30~5: The conductive polymer mixed in a weight ratio of 95 is mixed with 0.1 to 7.0 parts by weight of a non-halogenated quaternary ammonium salt corresponding to 100 parts by weight of the conductive polymer. Also provided is a non-halogen composition comprising a non-halogen polymer and a non-halogen quaternary ammonium salt of sulfonic acid or the like. The composition can be used to prepare rubber products such as conductive rubber rollers.

The invention discloses a preparation process of an insulin sensitizer. The preparation process comprises the following steps: mixing 2-(4-fluorobenzoyl) cyclohexanone, L-tyrosine methyl ester, dioxane and methylbenzene, filling nitrogen and reacting, carrying out a distilling procedure, and reacting with the addition of anisole and palladium/carbon so as to obtain a first product; mixing the first product with dichloromethane, adding methylsufonyl chloride and pyridine, reacting, distilling and removing dichloromethane so as to obtain a second product; mixing for reacting the second product with tetrahydrofuran and 1,2-dibromoethane, and thinning with water so as to obtain a third product; and mixing for reacting the third product with salt, cuprous chloride, carbazole, 8-hydroxyquinoline and dimethyl sulfoxide, thinning with water and extracting with ethyl acetate, distilling and removing ethyl acetate so as to obtain a final product, namely 2-[2-(4-fluorobenzoyl) aniline]-3-[4-(2-carbazolyl ethyoxyl) phenyl] methyl propionate. The yield of the final product is 47%; and in the process of joining the final product and carbazole, the circumstance of ester hydrolysis in a synthesis reaction of the novel insulin sensitizer, namely chiglitazar, is avoided.