93 results about "Ethylene Dichloride" patented technology

The invention relates to a preparation method of a composite material prepared by graphene oxide and magnetic mesoporous silica microspheres through chemical bonding interaction. The magnetic particles are prepared by a hydrothermal process; after acid ultrasonic treatment, the magnetic particles are firstly coated with a thin silicon oxide shell layer by a sol-gel method; after that, long-chain alkane is taken as a pore-forming agent, the magnetic particles are copolymerized with tetraethyl orthosilicate (TEOS) in the sol-gel reaction, and then the pore-forming agent is removed by thermal etching, so that the magnetic mesoporous silica particles with certain hydroxyl on the surfaces can be obtained; polyetherimide (PEI) surface modification is carried out on the magnetic mesoporous silica particles, and strong interaction between PEI and silicon hydroxyl is utilized; finally, the carboxyl on ethylene dichloride (EDC) activated graphene oxide reacts with amino on the PEI, so that the graphene oxide magnetic mesoporous silica composite material can be obtained. The preparation method is simple, convenient and controllable and is favorable for amplification preparation. The composite material has large specific surface area and good magnetic controllability, and can adsorb humic acid and heavy metal ions Pb (II) at the same time by virtue of surface groups.

A method of removing one or more heavy metals including mercury from industrial wastewater by use of a filtration and/or a solid-liquid separation system by use of a water soluble ethylene dichloride ammonia polymer.

The invention discloses a preparation method of a polyamide composite nanofiltration membrane, which comprises the following steps of partially hydrolyzing a polyacrylonitrile-based membrane under alkaline and heat treatment conditions, and activating the membrane in 1-ethyl-(3-dimethyl amino propyl) carbonyl diimine hydrochloride ethylene dichloride-hydrogen chloride (EDC-HCl) and N-hydroxyl succinimide (NHS); and then sequentially immersing the membrane in water phase monomer piperazine with low concentration and organic phase monomer benzenetricarbonyl trichloride, and the polyamide composite nanofiltration membrane is prepared by interfacial polymerization. The preparation method of the polyamide composite nanofiltration membrane has the advantages that compared with a traditional method, the method utilizes monomer solution with low concentration to perform the interfacial polymerization, high permeation flux can be obtained under ultra-low pressure (0.1MPa), and filter dye solution and saline solution have high separation selectivity.

A method of removing one or more heavy metals from industrial wastewater by use of a membrane separation process is disclosed. Specifically, the following steps are taken to remove heavy metals from industrial wastewater: (a) collecting an industrial wastewater containing heavy metals in a receptacle suitable to hold said industrial wastewater; (b) adjusting the pH of said system to achieve hydroxide precipitation of said heavy metal in said industrial wastewater; (c) adding an effective amount of a water soluble ethylene dichloride- ammonia polymer having a molecular weight of from about 500 to about 10,000 daltons that contain from about 5 to about 50 mole percent of dithiocarbamate salt groups to react with said heavy metals in said industrial wastewater system; (d) passing said treated industrial wastewater through a submerged membrane, wherein said submerged membrane is an ultrafiltration membrane or a microfiltration membrane; and (e) optionally back-flushing said membrane to remove solids from the membrane surface.

An improved process for the manufacture of ethylene oxide through the epoxidation of ethylene using a catalyst comprising silver and at least one efficiency-enhancing salt of a member of a redox-half reaction pair. Added to the epoxidation reaction is a two-component gas-phase promoter system comprising a chlorine-containing component (for example ethyl chloride, methyl chloride, vinyl chloride and ethylene dichloride), and a nitrogen-containing component of nitric oxide and other compounds capable of generating under reaction conditions at least one gaseous efficiency-enhancing member of a redox-half reaction pair comprising NO, NO₂, N₂O₃ or N₂O₄. The amount of each component of said gaseous promoter is adjusted to maintain the ration of N* to Z* less than or equal to 1 wherein, N* is the nitric oxide equivalent in ppmv, ranging from 1 to 20 ppmv and Z*=ethyl chloride equivalent (ppmv)*100 percent/ethane equivalent (mol percent)*100 ranging from 5 to 40 ppmv.

The invention relates to a grease inhibitor. The grease inhibitor mainly solves the technical problem that the conventional grease inhibitor has low specificity in an alkaline washing tower and poor application effects, is unstable, has high operation difficulty and has a high cost. The grease inhibitor comprises, by weight, 0.5 to 10 parts of an amine compound and 0 to 5 parts of an alcohol compound. The grease inhibitor solves the above technical problem and can be used to inhibit production of a large amount of grease in petroleum ethylene, methanol-to-propylene, methanol-to-olefin, vinyl acetate, ethylene dichloride and epoxypropane industrial alkaline washing towers thereby preventing tower blocking.

The invention relates to a Cupriavidus sp.SWA1 capable of degrading chlorinated olefin and application thereof. The strain has preservation number CCTCC NO: M 2015045. The bacteria can utilize refractory toxic organic matters such as trichlorethylene, ethylene dichloride and vinyl chloride the sole carbon source and energy for growth, so as to overcome the defects of the co-metabolic degradation process, and can maintain a high activity in oligotrophic environment. The Cupriavidus sp.SWA1 is applicable to the fields of waste water, drinking water and soil remediation, and is expected to achieve new breakthroughs in the engineering application field of chlorinated olefin biodegradation.

The invention discloses a preparation method of organic silicon grafted and modified polyphenylene sulphide. The preparation method comprises the following steps of: reacting polyphenylene sulphide powder, acetylchloride and anhydrous AlC13 powder in methylene dichloride or ethylene dichloride to obtain acetylation polyphenylene sulphide modified powder; and then reacting acetylation modified polyphenylene sulphide, an organic silicon monomer containing amino, acetic acid and molecular sieve in anhydrous toluene or ethanol under the protection of nitrogen at 70-110 DEG C for 0.5-36 h so as toobtain the organic silicon modified polyphenylene sulphide. The organic silicon grafted and modified polyphenylene sulphide disclosed by the invention has the significant advantages of being cheap inraw material, few in reaction step, simple for operation and uniform for grafting; simultaneously, because an organic silicon oxygen chain has the characteristics of heat stability and flexibility, the improvement on toughness of polyphenylene sulphide makes the most sense and is also beneficial to being compatible with other reinforcing materials and increasing composite properties thereof; and the grafted and modified polyphenylene sulphide still can be widely applied to the high-temperature resistant fields, such as electronic and electrical, automobile, national defence military and the like.

The invention discloses a micro-RNA-21 ultra-sensitive detection method based on double-enzyme signal cascade amplification. The method includes the steps: horseradish peroxidase enzyme-labeled probepreparation: coupling carboxylation polystyrene micro-spheres and horseradish peroxidase enzyme through DNA (deoxyribonucleic acid) single chains by an EDC (ethylene dichloride) carboxyl and amino coupling method; double-chain specific nuclease assisted target recycling: specifically cutting the DNA single chains complementarily paired with RNA (ribonucleic acid) to be detected in a probe by double-chain specific nuclease, triggering target circular reaction, releasing more horseradish peroxidase enzyme by cutting and amplifying signals; horseradish peroxidase enzyme signal amplification: collecting the horseradish peroxidase enzyme released in supernatant by cutting, adding a TMB (tetramethylbenzidine) chromogenic substrate, realizing naked-eye qualitative diagnosis by color change, and realizing enzyme-labeled quantification according to change of absorbance values. The difference of micro-RNA family members is effectively distinguished, and the method is suitable for community tumorscreening of high risk groups and has great application values in biomedical research and clinical diagnosis.

The invention provides a catalyst used in the process of preparing vinyl chloride from 1,2-ethylene dichloride and a preparation method of the catalyst. The catalyst consists of 10.0 to 80.0 weight percent of zeolite and 20.0 to 90.0 weight percent of inorganic oxide substrate, wherein the zeolite is a zeolite socony mobil-5 (ZSM-5) molecular sieve which comprises a rare earth element and has a melt flow index (MFI) structure; the rare earth element is 1 to 15 weight percent based on RE2O3; RE represents the rare earth element; and the inorganic oxide substrate can be a pure oxide or a complex of a plurality of oxides. In the preparation method, the catalyst is prepared by a spray drying forming method. Compared with the conventional thermal cracking technology, the method has the advantages that: energy consumption can be greatly reduced, production cost is reduced, and the catalyst is suitable for a fluidized bed reaction device.

The invention relates to a method for preparing dimethylphenyl isocyanate. Dimethylaniline and solid phosgene are used as raw materials; the molar ratio of the dimethylaniline to the solid phosgene is 2.0 to 2.4; the reaction time is between 3 and 6 hours; a reaction solvent is 1,2-ethylene dichloride; and the reaction temperature is the refluxing temperature of the 1,2-ethylene dichloride. The method, which prepares the dimethylphenyl isocyanate by using the solid phosgene to replace traditional phosgene or diphosgene, and reacting the solid phosgene with the dimethylaniline, has the advantages of simple and reasonable process course, safe and reliable operation, high reaction yield and low production cost, operating environment improvement, environmental pollution reduction, and easy realization of industrialized production.

The invention discloses a chemical synthesis method for optical pure R-2-hydroxyl-4-phenyl ethyl butyrate. The chemical synthesis method comprises the following steps: in an organic solvent and in the presence of azodiformate and triphenylphosphine, S-2-hydroxyl-4-phenyl ethyl butyrate and paranitrobenzoic acid are reacted and then filtered; after the filtrate is condensed and the solvent is recycled, R-esterified intermediate is obtained by recrystallization; the intermediate is catalyzed in ethanol by potassium carbonate to be subjected to transesterification reaction and then filtered; the filtrate is neutralized by hydrochloric acid; after the solvent is recycled, the filtrate is extracted by ethylene dichloride which is then recycled by an organic phase; and the filtrate is distilled under reduced pressure to obtain the optical pure R-2-hydroxyl-4-phenyl ethyl butyrate with high yield. The synthesis method for the R-2-hydroxyl-4-phenyl ethyl butyrate has the advantages of safety, high efficiency, quick and convenient operation, high selectivity, good yield and low cost, simplicity, general use and suitability for industrialized production.

The invention provides a preparation method of a CeO2-Cr2O3-Nb2O5 compound oxide catalyst. Chromium nitrate, cerous nitrate and acidic Nb2O5 oxide or niobium oxalate ammonia serve as raw materials, the CeO2-Cr2O3-Nb2O5 compound oxide catalyst is prepared through a precipitation-deposition or co-precipitation method, the molecular ratio of Ce to Cr in the catalyst is 4:1, and the mass ratio of (Cr2O3 + CeO2) to Nb2O5 is 4:1-1:9. The catalyst is simple in preparation technology and low in cost and has good catalytic degradation activity and stability on dichloromethane (DCM), ethylene dichloride (DCE), trichloroethylene (TCE), chlorobenzene and other chlorine-containing organic compounds, CO2 and HCl are high in selectivity, and no polychlorocarbon or other by-products are generated.

The invention discloses an automobile cleaning solution and cleaning method. The cleaning solution is prepared by mixing the following components in percentage by mass: 10-60% of dioctyl sodium sulfosuccinate, 5-15% of bamboo extracting solution, 5-15% of rape flower extracting solution, 5-15% camellia seed extracting solution, 5-15% of castor seed extracting solution, 5-15% of kudzu root leaching solution, 2-12% of sodium perborate and 10-20% of ethylene dichloride. The cleaning method comprises the following steps: taking a certain amount of cleaning solution, diluting with water to a 10-50 ppm mixed solution, uniformly spraying the cleaning solution through a spray gun onto the surface of an automobile with sludge and oil stains, waiting for 2-3 minutes, and performing water column rinsing through the spray gun. The automobile cleaning solution is accessible in raw materials and low in price, can be carried on the automobile, omits manual or mechanical friction, and greatly saves the automobile cleaning time; and the water consumption is greatly reduced while the automobile is effectively cleaned, thereby saving precious urban water resources.

A method of using substituted olefin polymers prepared by reacting one or more C₂-C₁₀ mono-olefin polymers having a number average molecular weight of about 300 to about 5,000 with C₄-C₁₀ monounsaturated dicarboxylic acid derivatives and compositions comprising the substituted olefin polymers for preventing fouling of hydrocarbon processing equipment, especially ethylene dichloride distillation units.

The invention discloses a sewage treatment agent. The sewage treatment agent is prepared from the following components in parts by weight: 15 to 20 parts of flocculant, 15 to 20 parts of disinfectant, 20 to 25 parts of deodorant, 15 to 20 parts of alum, 15 to 20 parts of potassium persulfate, 15 to 20 parts of magnesium oxide, 10 to 15 parts of sodium chloride and 8 to 12 parts of sodium persulfate, wherein the disinfectant is prepared from the following components in parts: 5 to 8 parts of peracetic acid, 2 to 5 parts of hydrogen peroxide, 4 to 8 parts of sodium lauryl sulfate, 5 to 6 parts of sodium carbonate and 2 to 5 parts of sodium aluminate; the flocculant is prepared from the following components in parts: 3 to 5 parts of propylene cystamine, 1 to 2 parts of acrylic acid, 1 to 3 parts of ethylene dichloride and 3 to 8 parts of disodium edentate; the deodorant is prepared from the following components in parts by weight: 5 to 10 parts of zeolite powder, 1 to 2 parts of sodium pyrophosphate, 3 to 5 parts of spice and 2 to 5 parts of ferrous sulfate. The invention discloses a preparation method of the sewage treatment agent. The sewage treatment agent has the advantages that the dirt removal ability is stronger; the cost of the raw materials is low, the manufacturing is simple, and the cost is reduced for an enterprise.

The invention discloses a dimethylamine salt of 2-methyl-4-chlorophenoxyacetic acid. The specific process steps are as follows: 1. adding chloroacetic acid to a reaction kettle, and dripping caustic soda solution to generate sodium chloroacetate; Phenol is added to another reactor, and caustic soda solution is added dropwise to generate sodium o-cresol; 3, the sodium chloroacetate of the previous kettle is added dropwise to the sodium o-cresol reactor of the next kettle to generate sodium 2-methylphenoxyacetate; 4. Transfer the above reaction materials into a chlorination reaction kettle, add hydrochloric acid to generate 2-methylphenoxyacetic acid crystals, add a mixed solvent of xylene and dichloroethane to dissolve the crystals into a solution, and carry out chlorination in the chlorination reaction kettle Reaction, generate 2-methyl-4-chlorophenoxyacetic acid, then transfer to the crystallization tank for crystallization, then put it into a centrifuge for centrifugation, and dry it into crystals after centrifugation; 4 Chlorine, dimethylamine aqueous solution and water are respectively added in the salt-forming reactor to generate the product 2-methyl-4-chlorophenoxyacetic acid dimethylamine salt. The preparation process has few reaction steps, safe process, high efficiency, short cycle and low cost.

The invention provides a method for preparing 2-furyl-methylketon from ethenone. In the presence of an acylation catalyst, furan and ethenone react in an organic solvent for 2-5 hours at 5-20 DEG C to prepare crude 2-furyl-methylketon, then the organic solvent is recycled through distillation and the 2-furyl-methylketon is prepared through rectification; the acylation catalyst is one or more of phosphoric acid, sulfuric acid and p-toluenesulfonic acid; the mass ratio of the acylation catalyst to furan is (0.005-0.009) to 1; the organic solvent is one or more of methylene dichloride, ethylene dichloride and chloroform. Compared with the prior art, the method has the advantages and benefits as follows: 1. the method is suitable for continuous production owing to lower raw material cost; 2. the method is suitable for industrial production due to lower reaction temperature; 3. no hydrogen chloride or acetic acid is produced in the production process, the corrosion is light and the discharge of three wastes is low; 4. the solvent can be used directly and indiscriminately after being recycled so as to realize green synthesis, the product yield is up to 95.0% and the purity is up to 99%.