187results about How to "The reaction process is green and environmentally friendly" patented technology

The invention belongs to the technical field of oil-gas-water collecting and transporting and discloses an oil field crude oil pour point depressant and a preparing method of the oil field crude oil pour point depressant. The preparing method includes the steps that acrylic ester or metacrylic acid ester is mixed with perfluor carboxylic ester firstly, an organic solvent is added, the temperature rises, and stirring is conducted; then styrene is added, the temperature rises under the nitrogen protection, an organic solvent solution of an initiator is dripped, and a product A is obtained after a reaction; and finally, a-olefin, a polymer B and the product A are mixed and evenly stirred, and the oil field crude oil pour point depressant is obtained. The oil field crude oil pour point depressant has the paraffin prevention pour point depressing function, does not contain chlorine, is very suitable for transporting of crude oil of an offshore oil field and has the characteristics that the dosage is small, and the pour point depressing amplitude is large. The preparing method of the oil field crude oil pour point depressant is simple, a polar group containing fluorine is directly introduced into a molecular chain through a further reaction, the reaction process is easy to control, safe, reliable and environment-friendly, and high general applicability is achieved.

The invention belongs to the technical field of the preparation of organic/inorganic microspheres, and in particular relates to a method for grafting an organic polymer on the surface of an inorganic nano magnetic particle by adopting a soap-free emulsion polymerization method. The method comprises the following steps of: (1) preparing and obtaining a magnetic nano particle with a reversible addition fragmentation chain transfer agent decorated on the surface according to the prior art, wherein a Z radical is carbazole, and an R radical is a magnetic monox composite nano particle with benzyl; and (2) combining a polymerization system from the magnetic nano particle with the reversible addition fragmentation chain transfer agent decorated on the surface, which is obtained from the steps (1), an oil-soluble monomer, an initiator and water to form a polymerization system, carrying out reversible addition fragmentation chain transfer polymerization in a soap-free emulsion system in an inert atmosphere under a stirring condition and centrifugally separating to obtain the magnetic nano particle which has a polymer shell and uses the magnetic silica nano particle as a core. The invention avoids using an organic solvent andor an emulsifier in one aspect and has acan controllable the polymerization process in the other aspect.

The invention provides a preparation method of dimethyl succinate. The method comprises the steps of mixing maleic anhydride, an alcohol compound, carbon dioxide, hydrogen and a hydrogenation catalyst and conducting esterification hydrogenation reaction to obtain the dimethyl succinate. According to the method, the maleic anhydride, the alcohol compound and hydrogen serve as raw materials, the carbon dioxide serves as a solvent and an acid catalyst, under catalysis of the hydrogenation catalyst, the esterification hydrogenation reaction is conducted, and the dimethyl succinate is obtained. The carbon dioxide serves as the solvent of the esterification hydrogenation reaction and the acid catalyst, high catalytic activity is achieved, and the reaction rate is improved; the carbon dioxide and water generated in the reaction process can form acid, and an obtained product has certain solubility in the carbon dioxide, so that the reaction can be conducted in a positive direction, and the conversion rate and the production rate of the dimethyl succinate are improved. Experimental results show that the yield rate of the obtained dimethyl succinate exceeds 99%.

The invention relates to the technologies of self-propagating reaction and welding and cutting by the unmanned plane, particularly to a self-propagating-reaction-based high-altitude welding and cutting method by an unmanned plane. During the whole welding/cutting process, the self-propagating chemical reaction is used for releasing heat; and an external heat source is not required completely or is required partially. Products of the needed components and structure are obtained based on self-sustained reaction of rapid automatic wave combustion during welding. The unmanned plane is used for carrying self-propagating equipment and can arrive at a dangerous area rapidly or an area people can not reach easily. Welding/cutting of different materials can be realized by carrying self-propagating powder with different types. The self-propagating-reaction welding/current technology is combined with the unmanned plane, so that the overall welding/cutting efficiency is improved; and continuous energy supplying is not required when no ignition action is carried out, so that less energy is consumed. Moreover, the equipment is simple; presence of the staff at the working site is not required, so that operation is safe; and welding and cutting of different materials can be carried out. And the application range is wide.

The invention discloses a method for preparing piperacillin acid. The method comprises the following steps: adding ampicillin, water and a buffer solution with the pH of 6.0-9.0 into a reactor; adding EDPC into the reactor, meanwhile, adding an alkaline regulator to control the pH to be 6.0-9.0, and reacting for 30-60 minutes in the temperature range of 0 to 10 DEG C while carrying out heat preservation; and adding a solvent to crystallize, controlling the crystallizing point to be 15+/-2 DEG C, dropwise adding an acidic regulator to regulate the end pH to be 1.5-2.0, carrying out crystal growing for 1 hour in the temperature range of 0 to 10 DEG C, and then, filtrating, washing and drying crystals, thereby obtaining the piperacillin acid finished product. According to the method, during acylation, water is used as a solvent, and the buffer solution is added, so that synthetic reaction for piperacillin acid is inhibited from going towards a reverse reaction direction, the yield of piperacillin acid is increased, and the purity of the product is improved.

The invention relates to a preparation method and an application of ethylene sulfate. Ethylene sulfate is prepared through a catalytic oxidation reaction with glycol sulfite as a raw material, water as a reaction medium, metal and/or metal oxide as a catalyst and ozone as an oxidizing agent. The method has the characteristics that the yield is high, operation is convenient, aftertreatment is simple, no pollution is caused to the environment and the like.

The invention relates to an advanced treatment composite catalyst for industrial wastewater as well as a preparation method and application thereof. The composite catalyst-SKL-A is prepared by doping Mn, Co and Ni-substituted polyoxometallate PW11 with Fe and Cu, and then loading the Mn, Co and Ni-substituted polyoxometallate PW11 doped with Fe and Cu onto a modified carrier APS-SiO2. The preparation method can be used for overcoming the following defects: a Fenton process in an advanced oxidation process for advanced wastewater treatment is high in sludge amount and high in chemical feeding amount; a Fenton fluidized bed process is high in blockage possibility and difficult in continuous operation; an ozone catalytic oxidation process is low in treatment efficiency and limited in treatment capacity. The advanced treatment composite catalyst is large in specific surface area, increased in catalytic active points, improved in catalytic activity and improved in oxidation reaction velocity and oxidizing ability, has a favorable treatment effect on non-biodegradable pollutants in industrial wastewater, is low in stripping possibility during a reaction process and can be recycled. Compared with ferrous iron used as a catalyst in a Fenton reaction, the composite catalyst SKL-A is relatively efficient, broad in spectrum, and less in Fe leaching during use, and can be continuously and repeatedly used.

The invention discloses a method for preparing sulfoxide and sulfone through water phase oxidation of thioether. According to the method, H2O2 and a supported metal oxide catalyst are added to a thioether aqueous solution, and a reaction is performed to obtain sulfoxide and sulfone. According to the present invention, the reaction for preparing sulfoxide or sulfone is performed in the water phaseby using H2O2 as the oxidant without the organic solvent, wherein the product yield is high, the reaction conditions are mild, the reaction process is environmentally friendly, and the production costis low.

The invention relates to a cellulose graft modification method by using supercritical carbon dioxide as a green solvent, belonging to the field of high polymer chemistry. The cellulose graft modification method comprises the following steps: preparing a regenerated cellulose aerogel from cellulose, putting the regenerated cellulose aerogel, a grafting monomer and a catalyst in a supercritical carbon dioxide environment, and carrying out grafting reaction to obtain a regenerated cellulose aerogel grafting product, wherein the reaction temperature of the grafting reaction is 50-120 DEG C, the reaction pressure is 8-30 MPa, the stirring rate is 50-400 rpm, the reaction time is 1-48 hours, the regenerated cellulose aerogel accounts for 1-40 wt% of the grafting monomer, and the catalyst accounts for 0.14-3 wt% of the grafting monomer. The swelling and plastification actions of the supercritical carbon dioxide on the cellulose aerogel increase the accessibility of the regenerated cellulose aerogel, and enhance the dispersion and permeation of the monomers and the like in the regenerated cellulose aerogel.

The invention discloses a boron-nitrogen co-doped carbon/manganese oxide composite nanosheet material, a preparation method, and an application of the composite nanosheet material in capacitive deionization or in an electrode material of an electrochemical energy storage device. The preparation method comprises the following steps: adding boric acid into chitosan hydrogel, uniformly mixing the boric acid and the chitosan hydrogel, freeze-drying the mixture, and carbonizing the mixture to obtain boron-nitrogen co-doped carbon nanosheets; and putting the boron-nitrogen co-doped carbon nanosheetsin a potassium permanganate solution for reaction to obtain the boron-nitrogen co-doped carbon/manganese oxide composite nanosheet material. The boron-nitrogen co-doped carbon/manganese oxide composite nanosheet material is of a mutually connected three-dimensional sheet structure. The preparation method provided by the invention is simple and feasible, the reaction conditions are mild, and the carbon nanosheets are of a three-dimensional mutual connection structure. The prepared carbon/manganese oxide composite nanosheet material is rich in nitrogen and boron and is of a mesoporous-dominatedporous structure. The composite nanosheet material shows a good prospect in the fields of preparation of capacitive deionization and super capacitor electrodes and catalyst carriers.

The invention relates to a new method for improving a production process of water-soluble carboxymethyl chitosan by taking chitin as a raw material and sodium chloroacetate as a reactant. The method is characterized by taking chitin powder instead of chitosan powder as the raw material and adopting sodium chloroacetate for replacing high-irritation and corrosion chloroacetic acid used in conventional production for reaction, wherein the ethanol solution in certain concentration is used as the reaction solvent. The prepared carboxymethyl chitosan is capable of dissolving within the pH scope from 6.0 to 8.0, the degree of substitution is more than 80%, the degree of deacetylation is more than 70% and the purity is more than or equal to 85%. The chitosan derivative has excellent bacteria resistance, bacteriostasis, and moisture absorption and moisture retention performance and can be further purified for wide application to the fields of medicines, food or cosmetics. See abstract figuresfor the details of a schematic diagram for the process of preparing water-soluble carboxymethyl chitosan from chitin.

The invention provides a novel synthesis process for 4-phenyl-1-butanol. According to the process, tetrahydrofuran is used as a raw material and rapidly and moderately reacts with acyl chloride under catalysis of zinc chloride so as to obtain high-yield high-purity 4-chlrobutanol ester; without separation, 4-chlrobutanol ester and benzene undergo Friedel-Crafts alkylation under catalysis of aluminum trichloride to obtain 4-phenyl-butanol ester; and 4-phenyl-butanol ester undergoes hydrolysis under an alkaline condition so as to produce 4-phenyl-1-butanol. The process has the advantages of easiness, greenness, environment-friendliness, safety and low cost.

The invention relates to the field of renewable energy technology and environmental protection and particularly relates to a method for preparing alkane type biodiesel by using tung oil. The method comprises the following steps: utilizing a porous inorganic material as a carrier and preparing a catalyst through a stepwise impregnation method; introducing hydrogen to reduce and activate the catalyst; introducing gaseous tung oil to carry out a hydrocracking reaction with the hydrogen; and collecting the alkane type biodiesel generated after the hydrocracking reaction. The cetane number of the biodiesel prepared by the method provided by the invention is as high as 81-90 and is similar to that of a petroleum diesel component; the reaction process is environmental-friendly, thereby being suitable for industrial popularization and application; the preparation process is simple, the reaction procedures are simple and the conversion rate is higher than 85%; the highly unsaturated fatty acid of the tung oil limits the utilization of the tung oil serving as a biodiesel raw material, and a catalytic cracking method is adopted to carry out hydrogenation and cracking on the tung oil so that the tung oil is converted into high-quality biodiesel, thereby providing a foundation and reference for full use of tung oil resources.

The invention discloses a diffusion dialysis membrane (anion-exchange membrane) for recycling acid, as well as a preparation method and application thereof. The diffusion dialysis membrane consists of an organic phase and an inorganic phase, wherein the organic phase is polyving akohol (PVA) grafting epoxy group ammonium salt; the inorganic phase is alkoxy silane compound with amino; a content of water in the diffusion dialysis membrane is 196-267%; an ion-exchange capacity is 0.58-1.15mmol/g; an acid dialysis coefficient is 0.018-0.021m/h; a separation factor is 18.6-21; the acid dialysis coefficient and the separation factor are better than a commercial film DF-120. Since the epoxy group ammonium salt comprising the ion exchange group is directly introduced to obtain the ion-exchange capacity, the reaction conditions of the epoxy group, hydroxyl and amino are mild, therefore, the reaction process is simple and controllable; the utilization rate of raw materials is high; since all the reaction processes are carried out in water phase in the absence of the organic solvent; the reaction processes are green and environmentally friendly; the prepared diffusion dialysis membrane is high in heat stability and applicable to the acid recycling field.

The invention discloses a synthetic method for cordycepin. The method comprises the following steps: with adenosine as a starting material, subjecting adenosine and Mattock's bromide to bromination in a reaction solvent of acetonitrile and/or ethyl acetate during implementation of hydroxyl protection so as to obtain two products, i.e., 5'-[2,5,5-trimethyl-1,3-dioxolane-4-one-2-yl]-3'-bromo-3'-deoxy-2'-O-acetyl adenosine and 5'-[2,5,5-trimethyl-1,3-dioxolane-4-one-2-yl]-2'-bromo-2'-deoxy-3'-O-acetyl adenosine; then removing protective groups so as to obtain 3'-bromo-3'-deoxy-adenosine hydrochloride; and subjecting 3'-bromo-3'-deoxy-adenosine hydrochloride to debromination so as to obtain 3'-deoxyadenosine, i.e., cordycepin. The synthetic method provided by the invention is simple to operate, has short reaction steps and does not need purification in the process of reaction; and the purity and each index of the obtained cordycepin product are better than a currently commercially available cordycepin product.

The invention discloses a method for preparing a carbon nanosphere with a hierarchical pore high graphitization degree. The method comprises the following steps: (1) uniformly stirring and mixing glucose and other biologic materials, a nickel salt or a cobalt salt and an anionic surfactant in distilled water, adding the mixture into a hydrothermal reactor, and heating and maintaining the temperature for a certain time; (2) adding the obtained amorphous carbon material into a heating furnace in nitrogen protection, and heating and maintaining the temperature for a certain time; and (3) cleaning the obtained carbon material with dilute acid, and finally cleaning with distilled water and drying, thereby obtaining the finished product. The carbon sphere prepared by the method disclosed by the invention is low in cost, readily available, adjustable in diameter, high in porosity, adjustable in quantity and size of pores, high in graphitization degree and high in conductivity.