2775 results about "Ethyl Chloride" patented technology

The present invention relates to a process for producing high purity lithium hydroxide monohydrate, comprising following steps: concentrating a lithium containing brine; purifying the brine to remove or to reduce the concentrations of ions other than lithium; adjusting the pH of the brine to about 10.5 to 11 to further remove cations other than lithium, if necessary; neutralizing the brine with acid; purifying the brine to reduce the total concentration of calcium and magnesium to less than 150 ppb via ion exchange; electrolyzing the brine to generate a lithium hydroxide solution containing less than 150 ppb total calcium and magnesium, with chlorine and hydrogen gas as byproducts; producing hydrochloric acid via combustion of the chlorine gas with excess hydrogen and subsequent scrubbing of the resultant gas stream with purified water, if elected to do so; and concentrating and crystallizing the lithium hydroxide solution to produce lithium hydroxide monohydrate crystals.

The invention relates to a 4-benzoyl pyrazole compound with herbicidal activity. The structural formula of the 4-benzoyl pyrazole compound with the herbicidal activity is as shown in specifications, wherein R1 in the structural formula is selected from hydrogen, methyl or ethyl, R2 in the structural formula is selected from methylsulfonyl, methoxyl, methylthio, fluorine, chlorine or cyan, R3 in the structural formula is selected from hydrogen, methyl, methyl fluoride, difluoromethyl or trifluoromethyl, R in the structural formula is selected from a five-membered heteroaromatic ring, a six-membered heteroaromatic ring, C1-C6 alkoxyl, aromatic hetero-oxy, six-membered aryloxy or six-membered aromatic amino, and hydrogen in the C1-C6 alkoxyl can be replaced by fluorine or chlorine; m and n are selected from 0 or 1 and cannot be 1 at the same time. A series of relatively efficient weed killers and plant growth regulators with relative good selectivity and safety are synthesized by introducing a fluorine-containing functional group to a pyrazole 3-site and chemically modifying a pyrazole 5-site.

The invention provides a new phosphorous acid concrete super plasticizer with a polyethyleneimine structure as well as a preparation method and an application thereof. The phosphorous acid concrete super plasticizer with a polyethyleneimine structure can effectively improve the concrete fluidity, and the preparation method is simple and effective. The preparation method comprises the following steps: a) making chloro-substituted polyether react with polyethyleneimine so that a part of amino groups H of the polyethyleneimine are substituted to obtain polyethyleneimine with a polyoxyethylene ether branch structure, wherein the molar ratio of the chloro-substituted polyether to the imino groups contained in the polyethyleneimine is 1:(3-8); and b) performing phosphorylation of the remaining amino groups H of the polyethyleneimine with a polyoxyethylene ether branch structure to obtain the phosphorous acid concrete super plasticizer with a polyethyleneimine structure.

The invention relates to a cerium-based catalyst, and relates to an application of the cerium-based catalyst in methane oxyhalogenation methods used for preparing halogenated methane. The methane oxyhalogenation methods used for preparing halogenated methane comprise a methane chlorine oxidation method used for preparing methyl chloride and a methane bromine oxidation method used for preparing methyl bromide. The cerium-based catalyst is suitable to be used in methane oxyhalogenation reactions. The cerium-based catalyst can be a CeO2 catalyst, a cerium-based bi-component composite oxide catalyst, a load-type cerium-based oxide catalyst, or the like. With the cerium-based catalyst, the methane oxyhalogenation reactions including a chlorine oxidation reaction and a bromine oxidation reaction can be effectively and stably catalyzed, and methyl chloride and methyl bromide can be prepared. With the cerium-based catalyst, reactants such as CH4, HCl and O2 can be catalytically converted with high efficiency for carrying out a chlorine oxidation reaction, such that products CH3Cl and CH2Cl2 are produced. Also, with the cerium-based catalyst, reactants such as CH4, HBr(H2O), and O2 can be converted with high efficiency for carrying out a bromine oxidation reaction, such that products CH3Br and CH2Br2 are produced.

The disclosed integrated manufacturing process includes a combined liquid phase reaction and purification operation which directly produces trans-1-chloro-3,3,3-trifluoropropene and 3-chloro-1,1,1,3-tetrafluoropropane which is a precursor to the manufacture of trans-1,3,3,3-tetrafluoropropene. The mixture of co-products is easily separated by conventional distillation and 3-chloro-1,1,1,3-tetrafluoropropane is then dehydrochlorinated to produce trans-1,3,3,3-tetrafluoropropene by contacting in the liquid phase with a caustic solution or in the vapor phase using a dehydrochlorination catalyst.

The invention discloses a mesosulfuron-methyl synthetic method. The mesosulfuron-methyl synthetic method is characterized in that mesosulfuron-methyl is prepared from raw materials such as paratoluic acid by adopting the seven steps of chlorosulfonation-ammonolysis, oxidation, dehydration, reduction, alcoholysis, methyl sulfone chloride acylation and condensation. The mesosulfuron-methyl synthetic method provided by the invention has the advantages of being low in cost of the raw materials, easy in availability of the raw materials, simple in operation and mild in conditions, having low requirements on equipment, high yield and strong practicability and being suitable for industrial production.

The invention provides a polyvinyl chloride (PVC) mixture which comprises the following components in parts by weight: (a) 100 parts of PVC resin, (b) 5-30 parts of low-temperature toughening modifier, (c) 0.5-5 parts of stabilizer, (d) 0-50 parts of filler, (e) 0-50 parts of wood meal, (f) 0-10 parts of acrylic polymer, (g) 0-20 parts of anti-shock modifier, (h) 0-5 parts of lubricant and (i) 0-10 parts of pigment. The low-temperature toughening modifier is rubber powder of which the elongation at break is 1000-1600% and the weight percent of chlorine is at least 10%. The elongation at break of the PVC mixture is greatly enhanced, thereby basically overcoming the defect of low elongation at break of the PVC product, greatly widening the application range of PVC and enhancing the industrial competitive power of PVC.

The invention relates to a preparation method of abiraterone acetate. The method comprises: taking dehydroepiandrosterone as the raw material, which successively reacts with hydrazine hydrate and idoine so as to obtain 17-iodo-adrost-5, 16-diene-3beta-ol, which then undergoes a Negishi coupling reaction with 3-pyridine zinc halide to obtain abiraterone, and finally conducting esterification with acetyl chloride or acetic anhydride, thus obtaining the target product abiraterone acetate.

The invention discloses a barium-strontium-calcium descaling and blockage removing agent for a near-well area and a preparing method of the barium-strontium-calcium descaling and blockage removing agent. The barium-strontium-calcium descaling and blockage removing agent comprises a polyamine carboxylate solution, nonionic surfactant accounting for 3%-10% of the total mass of the polyamine carboxylate solution and an emulsion breaker accounting for 2%-8% of the total mass of the polyamine carboxylate solution. The polyamine carboxylate solution is prepared from polyamine midbody and chloroacetic acid salt through a reaction, wherein the polyamine midbody is prepared through organic amine and epoxy chloropropane with the mole ratio of 1.05-1.5:1 through a reaction, and the chloroacetic acid salt is prepared from chloroacetic acid and alkali with the same mole ratio through a reaction. The barium-strontium-calcium descaling and blockage removing agent for the near-well area has a good removing effect on indissolvable salt such as barium sulfate, strontium sulfate and calcium sulfate, and the descaling rate is higher than 40%. Meanwhile, the barium-strontium-calcium descaling and blockage removing agent has the expansion preventing and inhibiting performance, the clay expansion reducing rate is higher than 80%, corrosion to equipment is slight, and water locking can be avoided. Blockage removing can be effectively achieved on a reservoir stratum near a well, the permeability of the reservoir stratum is improved, and thus the recovery ratio of oil and gas resources is increased.

Disclosed is an integrated manufacturing process to co-produce (E)1-chloro-3,3,3-trifluoropropene, (E)1,3,3,3-tetrafluoropropene, and 1,1,1,3,3-pentafluoro-propane starting from a single chlorinated hydrocarbon feed stock, 240fa. The process includes a combined liquid or vapor phase reaction/purification operation which directly produces (E)1-chloro-3,3,3-trifluoropropene (1233zd(E)) from 240fa. In the second liquid phase fluorination reactor 1233zd(E) is contacted with HF in the presence of catalyst to produce 1,1,1,3,3-pentafluoropropane (245fa) with high conversion and selectivity. A third reactor is used for dehydrofluorination of 245fa to produce (E)1,3,3,3-tetrafluoropropene (1234ze(E)) by contacting in the liquid phase with a caustic solution or in the vapor phase using a dehydrofluorination catalyst. This operation may be followed by one or more purification processes to recover the 1234ze(E) product.

The invention discloses a preparation method of N,N-diisopropylethylamine, which comprises the following steps of: reacting diisopropylamine and ethyl chloride as raw materials in a high-pressure autoclave by adopting an MIX type catalyst, wherein the mol ratio of the diisopropylamine to the ethyl chloride is 2-4:1, the mass ratio of the MIX type catalyst to the ethyl chloride is 1:20-10, the reaction temperature is 130-230 DEG C, the reaction pressure is 0.8-2.5MPa, and the reaction time is 4-10 hours; and adding a strongly alkaline solution into the obtained reaction liquid until the pH is 12.5-13.5, and then carrying out liquid separation and rectification to obtain the N,N-diisopropylethylamine. The preparation method of the N,N-diisopropylethylamine has the characteristics of simple process, high yield, low cost and little discharge of the three wastes.

The present invention relates to mixtures of 1,1,1,3,3,3-hexafluorobutene (1336mzzm) and 1-chloro-3,3,3-trifluoropropene (1233zd). The blends are useful as blowing agents for polymer foam, solvents, aerosol propellants and heat transfer media.

The invention discloses a gold-containing catalyst for preparing vinyl chloride by using an acetylene method as well as a preparation method and application of the catalyst. The catalyst contains a gold element, a lanthanum element, a cobalt element, a co-catalytic metal element and a carrier with a porous micro-structure. The gold accounts for 0.3%-2% by mass of the catalyst; the gold element in the catalyst comes from gold chlorides or gold nitrates; the cobalt element comes from chlorides of the cobalt or cobalt nitrates; and the lanthanum element comes from lanthanum chlorides or lanthanum nitrates. The catalyst disclosed by the invention in use is free from inactivation phenomenon caused by sublimation of industrial catalyst mercury chloride, has no pollution to the environment, overcomes defects of high toxicity and high pollution of the conventional industrial catalyst mercury chloride, has the characteristics of simple preparation method, high conversion rate of the acetylene and selectivity of the vinyl chloride, long service life up to 1000 hours or more, high temperature resistance, and high intensity and is renewable, and the conversion rate of the acetylene and selectivity of the vinyl chloride approximate to or exceed the technical indexes of the mercury chloride catalyst.

The invention discloses carboxymethyl chitosan quaternary ammonium salt/PAMAM(Polyamidoamine) core-shell nanoparticles and a preparation method. The nanoparticles are chitosan derivatives which are formed in a way that amino-terminated polyamidoamine dendritic macromolecule is grafted with carboxymethyl chitosan quaternary ammonium salt, and the chitosan derivatives are self-aggregated to form core-shell nanoparticles in water solution. The preparation method comprises the following steps: performing quaterisation decoration to amino at a second position of chitosan by CTA (3-Chloro-2-hydroxypropyltrimethyl ammonium chloride); performing carboxymethyl decoration to hydroxy at a sixth position of chitosan quaternary ammonium salt to synthetize carboxymethyl chitosan quaternary ammonium salt; activating carboxyl of the carboxymethyl chitosan quaternary ammonium salt by using NHS(N-Hydroxysuccinimide)/EDC(carbodiimide) to link the amino-terminated polyamidoamine dendritic macromolecule to synthetize the dendritic chitosan derivatives. The preparation process condition is simple and mild, and the product is easy to purify; and the core-shell nanoparticles of the prepared dendritic chitosan derivatives have the advantages of excellent water-solubility and functionality and has the attractive application prospect in the fields of antibiosis, gene transfer and drug controlled release.

The invention relates to a nitrogen, silicon and chlorine thee-element synergic flame retardant tri{2-chloro-3-[tri(chloroethoxy)silicon acyloxy]propyl}isocyanurate compound and a preparation method thereof. The structure of the compound is shown as a formula in the specification. The preparation method comprises the following steps: dripping organic solvent solution of triglycidyl Isocyanurate into silicon tetrachloride, and reacting for 4 to 6 hours at a temperature of between 50 and 70 DEG C; and cooling to 30 DEG C, introducing ethylene oxide under the liquid surface, reacting for 2 to 3 hours at a temperature of between 45 and 55 DEG C, and purifying to obtain the tri{2-chlor-3-[tri(chloroethoxy)silicon acyloxy]propyl}isocyanurate. The compound has good flame retardant plasticization, and is suitable for flame retardant plasticizer such as polyvinyl chloride, polyurethane, epoxy resin, unsaturated resin and the like; and the method has simple production process and low cost, and is easy for industrial production.

The invention relates to a method for synthesizing a phenoxyacetic acid derivative. The method comprises the steps of mixing a salt compound of phenol or methyl phenol and a salt compound of chloroacetic acid, putting the mixture in a solvent to carry out a heating reaction, acidifying with an inorganic acid to obtain phenoxyacetic acid, dissolving the phenoxyacetic acid in a solvent, adding a catalyst to the solvent, passing chlorine in the solvent and carrying out a heating chlorination, cooling and crystallizing to obtain a chlorinated phenoxyacetic acid derivative or a methyl phenoxyacetic acid derivative. Compared with a conventional method, the method provided by the invention can recycle the solvent of the reaction system and wastewater for cycle use during the reaction process, can meet self-production balance and realize recycle and reuse of a sealed system, and has a yield higher than 95%, a content larger than 98%, the recycle and reuse utilization rate of the solvent higher than 95% and emission reduction of the waste water in the whole production process higher than 95%.

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 discloses composite modified starch as a hematite reverse flotation inhibitor and a preparation method thereof. The composite modified starch comprises 100 weight portions of raw material starch, 0.5-10 weight portions of sodium hypochlorite as an oxidizing agent, 1.2-7.0 weight portions of sodium hydrosulphite, 0.2-1.2 weight portions of sodium nitrite as esterification reagents, 0.5-3.5 weight portions of 3-chloro-2-hydroxypropyl-trimethyl quaternary ammonium salt as a cationic reagent, 3.0-7.0 weight portions of caustic alkali, and 25-40 weight portions of water. The composite modified starch contains carboxylic groups, sulfonic anions, and quaternary ammonium cations, and has the advantages of cold water solubility and low viscosity, and has the advantages of increasing the yield of hematite concentrate, improving the filtering conditions of iron ore pulp, and the like.

The invention provides a synthetic system of 3-cyanomethylbenzoic acid methyl ester and a method thereof. The system comprises an acylation reaction vessel used for preparation of m-Toluoyl chloride;a liquid chlorine feeding unit used for storing and conveying liquid chlorine; a chlorination reaction unit which is connected with the acylation reaction vessel and used as a chlorination reaction chamber of m-Toluoyl chloride; a micro-interface generator which is respectively connected with the liquid chlorine feeding unit and the chlorination reaction unit and used for receiving liquid chlorineconveyed by the liquid chlorine feeding unit, crushing the liquid chlorine into micro-droplets with the diameter being micron level and conveying the micro-droplets to the chlorination reaction unitafter the crushing; and an esterification and cyanation reaction unit which is connected with the chlorination reaction unit. In the prior art, m-Toluoyl chloride and liquid chlorine cannot be fully mixed when m-Toluoyl chloride and liquid chlorine react such that yield of 3-cyanomethylbenzoic acid methyl ester is reduced. The above problem is solved by the synthetic system and the method of the invention.