1728 results about "Carbon tetrachloride" patented technology

A process is provided for the production of 1,1,1,3,3-pentachloropropane. The process comprises: (a) producing a product mixture in a reactor by reacting carbon tetrachloride and vinyl chloride in the presence of a catalyst mixture comprising organophosphate solvent, iron metal and ferric chloride under conditions sufficient to produce 1,1,1,3,3-pentachloropropane; (b) subjecting the 1,1,1,3,3-pentachloropropane containing product mixture from step (a) to evaporation such that a fraction enriched in 1,1,1,3,3-pentachloropropane is separated from the product mixture and a bottoms fraction results which comprises the iron metal/ferric chloride catalyst components and heavy end by-products; and (c) recycling at least a portion of the bottoms fraction from step (b) to the reactor.

The invention discloses a method for preparing white carbon black by utilizing silicon tetrachloride. The method comprises the following steps: mixing deionized water and low molecular fatty alcohol at the molar ratio of 1:4-4:4, and adding a proper amount of surfactant; slowly adding a certain amount of the silicon tetrachloride at the room temperature; and obtaining the white carbon black through the steps of preparing reaction solution, curing the reaction solution, sedimentation and abstersion, pulpifying and spray drying, wherein the concentration of the silicon tetrachloride is controlled to be 0.2-1.0 mol.1-1, and modifiers such as 0.01-0.1mol.1-1 of Hexamethyl disilazane and the like can be added in the preparation process of the hydrophobic white carbon black. The grain diameter of the prepared white carbon black is 50-350nm and the specific surface area is 100-300m<2>.g-1; and the method has high economic value and the prepared white carbon black has good hydrophobic effect.

The invention relates to an engineering process for producing a low-iron low-silicon 3004 alloy by directly cast-rolling electrolytic aluminium liquid. The process comprises the procedures of alloy aluminium melting, ingredient adjusting, on-line refining for three times, standing, outgassing, grain refining, filtering, tilting cast-rolling, homogenizing, cold rolling, intermediate annealing, another cold rolling, full annealing, recoiling and packaging. The refining comprises powder spraying refining in a melting furnace and combined refining of on-line argon and carbon tetrachloride introducing. The annealing comprises high-temperature quick annealing, the intermediate annealing and the full annealing. During the cast-rolling, the temperature in a front box is 710-720 DEG C, and the cast-rolling speed is 600-900 mm/min. The product is the low-iron low-silicon 3004 alloy. The low-iron low-silicon 3004 alloy comprises 0.06-0.14 wt% of Si, 0.25-0.43 wt% of Fe, 0.012-0.14 wt% of Cu, 1.0-1.2 wt% of Mn, 0.8-1.0 wt% of Mg, at most 0.02 wt% of Zn, 0.015-0.03 wt% of Ti and the balance of Al. The invention has the characteristics of simple procedure, energy saving, emission reduction, goodalloy performance and low earring rate.

An endotoxin adsorbent used for blood perfusion is prepared from agat through adding the aqueous solution to the liquid mixture of toluene and CCl4 to obtain spherical agar, activating by epoxy chloropropane under alkaline condition, reacting on diamine and then on glutaraldehyde to obtain high-strength agar beads used as the carrier of adsorbent, reacting on the amino contained ligand (polymyxin B), and reducing by NaBH4. Its advantages are high compatibility to blood and high effect on absorbing endotoxin from blood.

The invention provides a reversible overcharge protective electrolyte additive for a lithium battery and a preparation method thereof. The invention is characterized in that the additive contains at least one aromatic compound selected from amino-benzene, diphenylamine, triphenylamine, pyrrole, thiophene, phenylene sulfide and benzene, or at least one derivative thereof, the mass percentage of the additive in the electrolyte is in a range from 0.3 percent to 20 percent. An auxiliary solvent made of methylbenzene, dimethylbenzene, carbon tetrachloride or chloroform, in a volume less than 20 percent of the electrolyte, is added into the common electrolyte, to increase the dissolvability of the additive molecule in the electrolyte. Then the electrolyte additive is added. The additive molecule can rapidly undergo polymerization at a certain electric potential and form a polymer bridge between the anode and the cathode, and the electronic conductivity of the polymer bridge can reversibly change between insulation state and conduction state along with the voltage variation of the anode, thereby providing the battery with reversible overcharge protection.

A process for preparing the oligose of fucosan sulfate includes such steps as preparing the aqueous solution of fucosan sulfate, adding oxidant chosen from hydrogen peroxide, hypochlorous acid, nitrous acid, or their salts, heating, membrane ultrafilter, vacuum concentrating and freeze drying. Its advantages are high medical effect to protect liver and take care of health, and low cost.

The invention discloses an ultralow-mercury catalyst. The ultralow-mercury catalyst is prepared by taking the wooden activated carbon with carbon tetrachloride adsorption rate of being greater than or equal to 70 percent, an iodine value of being greater than or equal to 1,000 mg/g, moisture of being less than or equal to 5 percent, ash content of being less than or equal to 7 percent, mechanical strength of being greater than or equal to 95 percent, stacking density of being 360-420 g/l, particle size of being 2.5-4.0 mm and specific surface area of being 1,000-1,800 m<2>/g as a carrier and adsorbing mercury chloride and collaborative promoters of zinc chloride, barium chloride, potassium chloride and bismuth chloride at a central position, wherein the content of the mercury chloride is only 0.5-4.0 percent; but since the mercury chloride occupies the central position with stronger activated carbon adsorption capacity and reaction activity and the added active ingredient bismuth chloride and the adopted activated carbon are the wooden activated carbon with ultrahigh voidage, and meanwhile the collaborative promoters are also added to realize great collaborative effect of the activated carbon and the mercury chloride, the catalyst has longer service life and higher activity.

This invention relates to a method for separating and purifying mixing exhaust gas of chlorine and hydrochloride, comprising: absorb the chlorine in the mixing exhaust gas using solvent A to separate from gas phase hydrochloride, the chlorine can be obtained after solvent A desorption, the hydrochloride can be obtained by removing solvent A in the gas phage hydrochloride using solvent B, wherein: solvent A is one of benzene, silicon tetrachloride, nonyl hydride, sulfur monochloride, carbon tetrachloride and chlorosulfonic acid, and solvent B is one of cyclopentadiene and hexachlorobutadiene. By washing with concentrated hydrochloric acid to remove trace amount of organic compounds, and chemical washing to remove heavy metal elements, the hydrochloride is absorbed by water to make hydrochloric acid. This invention is characterized of efficient separation of chlorine and hydrochloride, high efficiency of separation, low cost, high-usage of resources, high purity of chlorine up to 99%, recycling use, and the purity of hydrochloride meets the requirement of producing industrial hydrochloride and hydrochloride regent .

The invention provides a production method of 1,1,1,3,3-pentachlorobutane (HCC-360jfa), in which carbon tetrachloride and 2-chloropropene are taken as raw materials for continuous reaction in a tubular reactor to synthesize the 1,1,1,3,3-pentachlorobutane. In the method, the carbon tetrachloride and 2-chloropropene are firstly mixed and preheated to reaction temperature; the carbon tetrachloride and 2-chloropropene enter the tubular reactor with a catalyst for telomerization; a product undergoes flash evaporation to remove the un-reacted tetrachloride and 2-chloropropene and then is further distilled to obtain the HCC-360jfa product; the un-reacted tetrachloride and 2-chloropropene are recycled; and the catalyst undergoes activating treatment for recycle. The catalyst used by the invention is liquid, no solid exists in the reaction product, and the tubular reactor is used for reaction, so that the invention is convenient for operation and easy for continuous production.

The invention relates to multilayer metal nitride/graphene electrochemical super capacitor composite electrode materials and a preparation method thereof. The preparation method of the multilayer metal nitride/graphene electrochemical super capacitor composite electrode materials comprises (1) preparing graphene oxide; (2) self-assembling silicon source on the surface of the oxidized graphene to obtain layered graphene oxide-mesoporous silica composite materials GO-SiO2 under an alkaline condition with a cationic surface active agent as a template agent; (3) roasting carbon tetrachloride and ethylenediamine in inert gas after polymerization with the GO-SiO2 as a template and then removing the SiO2 in the template agent to obtain layered graphene-mesoporous carbon nitride composite materials G-C3N4 and (4) cross-linking a metal precursor on the template agent G-C3N4 and then roasting in inert atmosphere to obtain the multilayer metal nitride/graphene electrochemical super capacitor composite electrode materials. The electrode materials prepared from the method have the advantages of being up to 876 farads per gram in specific capacitance, being capable of remaining over 95% in specific capacitance after charge-discharge cycles for 2000 times, being long in service life and being good in cycling stability.

The invention relates to a method for synthesizing carbide nano powder by a solid-phase reaction, which comprises the following steps of: mixing a silicon source or a metal source, a carbon source, magnesium powder and elementary iodine according to a mol ratio of 1: (0.05-2): (1-25): (1.25-12), sealing the mixed material in an autoclave, and placing the autoclave in a drying box to perform a reaction for 6 to 48 hours at the temperature of between 100 and 500 DEG C; and washing, separating and drying the product to obtain the carbide nano powder. In the invention, glucose or maltose which universally exists in the natural world is used as the carbon source to avoid using a chlorine-containing carbon source such as carbon tetrachloride and tetrachloroethylene which have bad influences on an operation environment, and the reaction temperature and the reaction pressure are relatively mild, so that the method for synthesizing carbide nano powder by the solid-phase reaction has a potential for mass production.

The molecular formula of designed fire retardant for cellulose is C12H26O4P2S2N2 named as DDPSN. The preparing method includes reacting on trichloro-thiophosphorus with neophenyl dialcohol for 1.5-3 h. under dissolving of benzene or pyridine at 45-75 deg.C temperature, washing and distillating to remove benzene, forming DDSP by benzinum recrystallization and by drying for 24h. with airflow, reacting on drid DDSp with ethylene diamine for 3-5 hr. at 10-30 deg.C temp under dissolving of chloroform or carbon terochloride and obtaining DDPSN by ethyl ether recrystallization through 24 hr. drying with airflow.

Disclosed are a positive temperature coefficient material, a preparation method thereof, a positive temperature coefficient thermistor including the positive temperature coefficient material and a preparation method thereof. The material is a product formed by a mixture through melting; the mixture comprises resin, conductive filling, non-conductive filling, promoter and cross-linking agent, wherein, the mixture also comprises additives; and the additives are selected from silicon dichloride, sodium fluoride and carbon tetrachloride. The positive temperature coefficient material is provided with good stability and the output power of the positive temperature coefficient material is slowly attenuated along with the increase of the switching movement times, so that the thermistor prepared with the positive temperature coefficient material is provided with good room temperature resistance stability and PTC intensity stability after the thermistor is frequently used.

The invention provides a chloration method for phenoxyacetic acid and derivatives thereof, which comprises the following steps that: raw materials of the phenoxyacetic acid or the derivatives of the phenoxyacetic acid and chlorinating agents take reaction at a certain temperature in organic solvents under the effect of catalysts, wherein the chlorinating agents can be chlorine gas, sodium hypochlorite, calcium hypochlorite and sulfuryl chloride, the catalysts can be lewis acid and sulfurated substances, and solvents can be dichloromethane, dichloroethane, trichloromethane, carbon tetrachloride, formic acid, ethyl acetate, benzene, toluene, dimethylbenzene, chlorobenzene and o-dichlorobenzene. The method has the advantages that the operation can be carried out under the waterless condition, the generation of a large amount of industrial waste water is avoided, the used catalysts are safe and are easy to obtain, the solvents can be cyclically used, and the industrialization is easy.

The invention relates to a carbon-nitrogen porous material and a hydrogen storage application thereof, which belong to the field of inorganic nano material chemistry and new energy resources-related technology. An ordered meso-porous carbon-nitrogen compound is prepared by a meso-porous silicon dioxide hard template method, wherein, ethylene diamine is taken as a precursor and carbon tetrachloride is taken as a solution; the ethylene diamine and the carbon tetrachloride are mixed and stirred evenly for reflux and immersion; the sample obtained is carbonized at high temperature and detemplated to obtain an ordered meso-porous carbon-nitrogen material; the ordered meso-porous carbon-nitrogen material is treated and activated by carbon dioxide at high temperature, wherein, air flow, activation temperature and activation time are controlled; and then a nitrogen-doped porous carbon material with special appearance and pore structure is obtained. The material can be taken as a high-performance hydrogen storage medium at room temperature, and can absorb 2.21wt% hydrogen in a reversible manner under the condition of room temperature and 80Mpa. Compared with the conventional hydrogen alloy, the carbon material has the advantages of low cost, good cycle performance and higher hydrogen storage capacity.

A process for preparing trichlorosucrose-6-ester by solid-state phosgene chlorinating includes dissolving solid phosgene in inertial solvent, slowly dropping it in the solution of sucrose-6-ester in dimethyl formamide, stirring, heating while reaction, alkali solution neutralizing, distilling to remove solvent, dissolving in water, decoloring by activated carbon, extracting in organic solvent and crystallizing.

The invention provides a preparation method of a catalyst used in hydrogenation of silicon tetrachloride, which comprises the following steps of: mixing cuprous chloride after pretreatment and silicon powder in an agitated bed reactor, and performing heated reaction on the mixture under a hydrogen condition, wherein the pretreatment refers to putting the cuprous chloride into the silicon tetrachloride, stirring and heating the mixture, and drying the mixture in a shielding gas after filtration. The invention also discloses a method for applying the catalyst in the hydrogenation of the silicon tetrachloride, which comprises the following steps of: premixing the silicon tetrachloride and hydrogen gas to form a gas mixture; adding the gas mixture and the catalyst into a fluidized bed reactor for reaction; and separating a product of trichlorosilane from a reaction tail gas. The catalyst prepared by the method has high catalytic efficiency and greatly improves the yield of the trichlorosilane.

The invention relates to a hydrophobic high oil absorption soft polyurethane foam material and a preparation method and an application thereof, and belongs to the fields of synthesis of macromolecular oil absorption materials and environmental friendliness. The material is characterized by being prepared from 20 to 40 parts of isocyanate, 0 to 20 parts of polyethylene glycol/ triol, 30 to 95 parts of polypropylene glycol/ triol, 5 to 50 parts of polytetramethylene ether glycol/ triol, 1.1 to 4.8 parts of cross linker, 1.0 to 4.0 parts of surfactant, 1 to 15 parts of foaming agent, 3 to 20 parts of flame retardant and 0.5 to 5 parts of catalyst by one-step foaming. The material can quickly absorb oil, and in 3 minutes, the oil absorption rate of nitrobenzene is 83g.g<-1>, the oil absorption rate of carbon tetrachloride is 80g.g<-1>, the oil absorption rate of acetone is 69g.g<-1>, the oil absorption rate of dimethyl benzene is 67g.g<-1>, the oil absorption rate of toluene is 62g.g<-1>, the oil absorption rate of kerosene is 52g.g<-1>, and the oil absorption rate of diesel oil is 47g.g<-1>; and the material almost does not absorb water when being reused in an oscillation mixed oil-water system. The material can be effectively and quickly used for the recovery of leaked oil or organic reagents on the dynamic water surface, the ground or the surfaces of other objects and treatment of oil leakage accidents.

The invention concerns a method for the manufacture of silicon tetrachloride by conversion of a mixture of finely divided and/or amorphous silicon dioxide, carbon and an energy donator with chlorine. Energy donators are metallic or silicon alloys such as silicon, ferrosilicon or calcium suicide. The addition of the donors effects a self-sustaining, exothermic reaction on one hand and a significant lowering of the reaction starting temperature on the other hand. As finely divided and/or amorphous silicon dioxide ashes containing silicon dioxide are primarily used. These are produced by the incineration of silicon-containing plant skeletal structures such as rice husks or straw. Other sources include silicas from the digestion of alkaline earth silicates with hydrochloric acid and filtered particulate from the electrochemical manufacture of silicon, as well as naturally occurring products containing silicon dioxide, such as diatomaceous earth kieselguhr).