595results about How to "Reduce reaction energy consumption" patented technology

The present invention relates to process of catalytic hydration of ethylene epoxide to prepare glycol and aims at solving the problems of available corresponding process. The said process is especially suitable for low water ratio operation, and has the features of very low heat energy consumption and power consumption, high activity, selectivity and stability of catalyst, and low production cost. The said process may be used in industrial production of glycol.

The invention provides a catalyst for converting diisononyl phthalate, diisooctyl phthalate, dibutyl phthalate and other long-chain esters into corresponding 1, 2-cyclohexane dicarboxylic acid binary ester through hydrogenation. The catalyst for converting the diisononyl phthalate, the diisooctyl phthalate, the dibutyl phthalate and other long-chain esters into corresponding the 1,2-cyclohexane dicarboxylic acid binary ester through the hydrogenation consists of main active ingredients, additives and carriers, wherein the main active ingredients are noble metal Ru and Pd; the additives are Fe, Co, Ni, Cu and other metals or oxides; and macroporous Al2O3, ZrO2, TiO2 and the like are selected as the carriers. Under certain temperature, certain hydrogen pressure and the action of the catalyst, the diisononyl phthalate, the diisooctyl phthalate, the dibutyl phthalate and other long-chain esters in a trickle bed reactor can be converted into the corresponding the 1, 2-cyclohexane dicarboxylic acid binary ester with high activity and high selectivity.

The invention relates to a new method for preparing hydrocarbons in the scope of aviation kerosene from C8-C16 furyl oxygen-containing organic compounds as raw materials by hydrogenation deoxidation reaction, wherein the C8-C16 furyl oxygen-containing organic compounds are obtained by C-C coupling of lignocellulose based platform chemical compounds; low temperature direct hydrogenation deoxidation under the condition of no solvent of the furyl oxygen-containing organic compounds can be realized by use of a metal-solid acid dual-functional catalyst to obtain a series of low freezing point branched alkanes having the chain in the length range of the aviation kerosene in high yield. The catalyst is composed of two parts of an active metal A and an acid vector X. The catalyst related in the method ahs the characteristics of being in no need of a solvent, simple in operation process, mild in reaction conditions, good in aviation kerosene (or diesel) selectivity, and the like, and is an ideal hydrogenation deoxidation catalyst for preparing liquid fuels from the furyl oxygen-containing organic compounds by the hydrogenation deoxidation.

The invention relates to the field of vanadium slag hydrometallurgy and vanadium chemical engineering, in particular to a method for extracting chromium and vanadium from vanadium slag at a low temperature and the normal pressure. The method comprises the following steps that firstly, burdening, wherein the vanadium slag and a NaOH solution are mixed to form reaction slurry; secondly, reaction, oxide gas is led into the reaction slurry through a micro-hole arrangement device to carry out normal-pressure oxidative leaching, and after the reaction, solid-liquid mixed slurry of a solution containing NaOH, Na3VO4, Na2CrO4, water soluble impurity components and iron-rich tailings is obtained; thirdly, solid-liquid separation; fourthly, impurity removing; fifthly, sodium vanadate crystallization; and sixthly, sodium chromate crystallization. According to the method, chromium and vanadium efficient common extraction can be achieved, the extraction efficiency of both chromium and vanadium can be higher than 85%, more importantly, after the micro-hole gas distribution manner is adopted, the oxygen solubility can be obviously improved, the reaction temperature and alkali concentration are obviously reduced compared with those of an existing vanadium extraction method, the operation safety is greatly improved, and reaction energy consumption is reduced.

The invention discloses a preparation method and application of diethyl phosphinates, belonging to the field of green flame retardants. The preparation method of the diethyl phosphinates comprises the following steps of: making hypophosphorous acid and/or an alkali metal salt thereof react with ethylene under the irradiation of ultraviolet light in the presence of a photoinitiator in a solvent system to obtain diethyl phosphinic acid and/or an alkali metal salt thereof; and making the obtained diethyl phosphinic acid and/or the alkali metal salt thereof react with metallic compounds of Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Ce, Sn and/or Fe to obtain corresponding diethyl phosphinates. In the invention, the photoinitiator is decomposed into free radicals under the irradiation of the ultraviolet light to initiate an additive reaction so that the reaction rate can be improved, the energy consumption required in the reaction can be reduced and the production cost of products can be lowered.

The invention discloses a method and a device for extracting lithium, which is used for preparing lithium carbonate, from a lapidolite ore by a chloridizing roasting method. The method comprises the following steps of: firstly, mixing the lapidolite ore, calcium chloride and sodium hydroxide with a compound bonding agent for pellet fabrication; secondly, performing chloridizing roasting in a square-frame shaped track type roasting furnace; thirdly, leaching out soot dust by using solution containing sodium carbonate and potassium carbonate to ensure that potassium, sodium, rubidium and cesium enter the solution and convert the lithium into lithium carbonate; fourthly, filtering the mixture to obtain a lithium carbonate solid, and circularly using the filtrated mother liquor to leach out the soot dust; fifthly, when an alkali metal salt is close to be saturated, indirectly heating the filtrated mother liquor by using the residual heat of the gas in the roasting furnace to evaporate part of water; sixthly, passing CO2 into the filtrated mother liquor to perform carbonation; and seventhly, performing cooling crystallization to separate out a mixed salt of the sodium carbonate and the potassium carbonate, returning part of the mixed salt which is used as an auxiliary material mixed and roasted with lapidolite for cyclic utilization, using another part of the mixed salt as a carbonate reagent needed in dissolution, and using the rest part of the mixed salt as byproducts of the sodium carbonate and the potassium carbonate. The method has the advantages of high lithium recovery rate, good material comprehensive utilization, large equipment productivity, high production efficiency, small water consumption in the process and less wastewater discharge.

The invention discloses a preparation method of organopolysiloxane resin. The preparation method includes the steps of (1), taking alkoxyorganosilane, an end-capping reagent and an acidic compound as preparation raw materials; (2), feeding the preparation raw materials with uniform stirring, wherein the feeding molar ratio of the end-capping reagent to the alkoxyorganosilane to the acidic compound is (0-40):1:(0.2-5); (3), adjusting the temperature at 40-150 DEG C at which condensation polymerization reaction is conducted for 2-20 hours; (4), terminating the condensation polymerization reaction, adjusting a reaction mixture to be neutral, and purifying a reaction product so as to obtain the organopolysiloxane resin. The preparation method of the organopolysiloxane resin has the advantages of environmental protection and no pollution during production, low energy consumption, short period, high product yield and the like and is more excellent in performance.

This invention involves a preparation method for chromium oxide with chromium salt as raw materials and reducing gas as a reductant. Said method comprises carrying out reaction of chromium salt with superfluous reducing gas at 300~850DEG C for 0.5-3 h and cooling to obtain a reaction mixture, washing the mixture and drying, and calcining at 400~1100DEG C for 1-3 h to obtain the ultrafine chromium oxide powders, wherein the chromium salt is chromate or dichromate, and the reducing gas is hydrogen, natural gas, gas or their mixtures. Compared with existing technologies, this invention has the advantages of simple production process and being easy for industrialization. The obtained chromium oxide has high purity, uniform particle size distribution and small particle size. The whole process does not produce containing chromium-containing waste, and is environmental friendly. The reaction by-product can be reused, which greatly reduces the cost of production. Low reaction temperature greatly reduces the reaction energy.

The invention provides a halamine antibacterial agent and a synthetic method and application thereof. The halamine antibacterial agent is a compound with a structure which is shown as a formula (I) or a formula (II). The synthetic method comprises the following steps of: reacting by taking epoxy chloropropane and cyanuric acid or a derivative of the cyanuric acid as synthetic raw materials at the temperature of between 5 and 50 DEG C for 6 to 12 hours, filtering, removing impurities to obtain a halamine antibacterial agent precursor with a structure which is shown as a formula (III) or a formula (IV), and performing halogenating reaction to obtain a finished product of the halamine antibacterial agent. According to the application of the halamine antibacterial agent to the preparation of an antibacterial material, the antibacterial material is prepared by the following steps of: treating a material to be treated by a working solution prepared from the halamine antibacterial agent precursor, taking the material out, drying, treating at the temperature of between 80 and 200 DEG C for 3 to 60 minutes, and performing halogenating reaction. According to the method, reaction condition is mild, a process is simple, and raw materials are low in cost and readily available; and the halamine antibacterial agent synthesized by the method and the halamine antibacterial agent precursor are water-soluble, high in yield, safe and non-toxic, and can be prepared into antibacterial textiles with high antibacterial performance.

The invention discloses a hydrogenation catalyst and a preparation method of 4,4'-diamino-dicyclohexyl methane. The hydrogenation catalyst comprises a carrier used as mesoporous carbon and an active component used as ruthenium, wherein the load capacity of the active component is 0.5-10 percent by mass of the hydrogenation catalyst. in the preparation method of low transisomer 4,4'-diamino-dicyclohexyl methane, the catalyst of the invention is adopted to selectively hydrogenate and generate a target product under the conditions of solvents and hydrogenation. In the invention, the catalyst and the method reduce the generation of byproducts while the higher conversion ratio of the 4,4'-diamino-diphenylmethane is remained, and decrease the content of the transisomer of the 4,4'-diamino-dicyclohexyl methane. Meanwhile, the catalyst is low in cost and simple and convenient in preparation and is suitable for industrial application.

The invention discloses a catalyst for preparing cyclohexanediamine by phenylenediamine hydrogenation under ammonia reaction conditions. The catalyst realizes the transformation of phenylenediamine and hydrogen into cyclohexanediamine under ammonia reaction conditions and comprises a main active component, one or more auxiliary agents and a carrier. The main active component is a precious metal Ru or Pd. The one or more auxiliary agents are selected from Re, Co, Ni, Fe and their oxides. The carrier is active carbon, Al2O3 or SiO2. In a slurry-bed reactor, at a certain temperature, under the action of ammonia and catalyst, the high activity and high selectivity transformation of phenylenediamine and hydrogen into a plurality of amine products comprising cyclohexanediamine as a main product is realized.

The invention provides a method for preparing adipic acid through liquid-phase catalytic oxidation of cyclohexanol. H2O2 is taken as oxidant, a heteropoly acid imidazole salt is taken as catalyst, the cyclohexanol undergoes the catalytic oxidation to prepare the adipic acid, the catalyst can be phosphotungstic acid 1-butyl-3-methylimidazolium bmim3PW12O40, phosphomolybdic acid 1-butyl-3-methylimidazolium bmim3PMo12O40, and molybdovanadophosphoric heteropolyacid 1-butyl-3-methylimidazolium bmim3+xPMo12-xVxO40 (x is equal to between 1 and 3) and so on, and the bmim represents a 1-butyl-3-methyl-imidazolium cation. Compared with the method of preparing the adipic acid by industrially using nitric acid (nitrate) to oxidize the cyclohexanol, the method can not produce poisonous oxynitride N2O, and avoids the harm to the environment; and in a reaction system, phase shift catalyst and addition agent are not used, which avoids the potential environmental pollution and has apparent economic and social significance.

The invention discloses a recycling method for an anode graphite material for an invalid prismatic lithium-ion battery. The method comprises the following steps: completely discharging the invalid prismatic lithium-ion battery, dismantling a negative pole piece and putting the negative pole piece into a dilute hydrochloric acid solution for ultrasonic dissolution; stopping ultrasound after completely separating graphite flakes from a current collector, taking out the separated current collector, and finishing recovery of the current collector after washing and drying; carrying out filtration, low-temperature vacuum drying and sieving on residual graphite slurry to obtain primarily purified graphite material, carrying out ultrasonic treatment on an oxidizing agent solution in a water bath, and carrying out centrifuging, washing, low-temperature vacuum drying and sieving to obtain secondarily purified graphite material; and carrying out ultrasonic reaction in low-temperature nitrogen atmosphere when steeping the graphite material into a reducing solution in the water bath, repairing the graphite material in the nitrogen atmosphere through thermal treatment, and cooling and sieving the graphite material, so as to obtain battery-grade modified graphite powder. The energy consumption of the reaction in the method is relatively low; and recovery is efficient.

The invention discloses a method for preparing carboxymethyl modified starch, which uses non-crystallization granule state starch as a basis and a microwave method as a core, and combines a part of processes of a drying method and a solvent method. The method comprises the following steps : (1) mixing certain amount of pure water with 95 percent of ethanol; adding the starch at a stirring state, keeping stirring and keeping a reaction container to be obturated, maintaining the temperature of a reaction system, and stirring to react for several minutes; (2) crushing a filter cake at the stirring state, spraying the prepared sodium hydroxide solution to stir at 25 DEG C and react for several minutes, again spraying a sodium chloroacetate ethanol liquid after the reaction is finished, stirring and evenly mixing; (3) evenly spreading a reaction mixture and placing the reaction mixture in a microwave oven to irradiate for several minutes; (4) washing the reaction product after being irradiated by microwave with the ethanol and centrifuging; and (5) drying, pulverizing and screening to prepare the carboxymethyl modified starch. The carboxymethyl starch with high substitution degree prepared through the method has the advantages of high reaction efficiency, short reaction period and low reaction energy consumption.

The invention relates to a preparation method of a noble metal catalyst. The method comprises the following steps: (1) mixing a carrier, a salt solution of noble metal, and a dispersant, and performing dispersion in the presence of ultrasonic wave to obtain a mixture; (2) adding the mixture in a reductant and performing reduction under microwave radiation to obtain a solid product; and (3) washing the solid product with distilled water, and drying the solid product to obtain the noble metal catalyst. The preparation method is simple and easy to operate; metal is dispersed uniformly on the carrier, the particle size of the metal is small, the reaction time is short and the energy consumption in reaction is low.

The invention discloses a preparation method of catalyst for producing 1,2-cyclohexane dicarboxylic ester through hydrogenation. The preparation method is characterized in that the catalyst comprises Ru and/or Pd as active components; Ru is 0.01-5.0% of the catalyst in percentage by mass, and Pd is 0.01-3% of the catalyst in percentage by mass; and a carrier is a mesoporous oxide which is selected from aluminum oxide, amorphous silica-alumina or silicon dioxide. The preparation method is carried out by the following steps of: a, drying the mesoporous oxide carrier; b, diluting a hydrochloric acid aqueous solution of a calculated quantity of Ru compound and/or a hydrochloric acid aqueous solution of Pd compound with a certain amount of deionized water, and evenly mixing; c, dipping a noble metal solution on the mesoporous carrier through an equivalent-volume dipping method, wherein the impregnation time is 1-10h; d, drying the catalyst for 10h at a temperature of 110 DEG C after the dipping process, raising the temperature to 200-500 DEG C through programs and roasting for 3h; e, washing the catalyst for 1-10 times by using 0.1-5wt% of NaOH aqueous solution; and f, stoving the catalyst for 10h at 120 DEG C after the catalyst is dried.

The invention discloses a method for preparing calcium carbide, which comprises the following steps: pyrolyzing junked tires to obtain high-temperature oil gas, iron wires and tire carbon black; mixing the tire carbon black with a calcium-base raw material to obtain a mixture; forming the mixture to obtain a massive furnace raw material; and smelting the massive furnace raw material in an arc furnace to obtain the calcium carbide. The technique can obviously lower the temperature and energy consumption, thereby lowering the production cost of the calcium carbide.