32results about How to "Control decomposition" patented technology

The invention provides a continuous production process for ultra-pure hydrogen peroxide, comprising the following steps: mixing the industrial hydrogen peroxide material with the modified active carbon; then classifying filter by microfiltration membrane and ultrafiltration membrane in sequence; the filtrate is pumped into the distillation column formed by a plurality of columns connected in series; adding metal ion complexing agent into the primary column; performing reverse osmosis on the semi-finished products out of the column before filtering by nanofiltration membrane to get ultra-pure hydrogen peroxide products. The device comprises the following parts: a raw material chute, an active carbon pre-mixer, a microfiltration and ultrafiltration filter, a distillation column formed by a plurality of columns connected in series, a reverse osmosis device, a nanofilter, a finished product receiver, a pump and a shaft; wherein, the raw material chute outlet is connected with the active carbon pre-mixer inlet; the microfiltration and ultrafiltration filter outlet is connected with the pump, the outlet of which is connected with the inlet of the distillation column formed by a plurality of columns connected in series; the outlet of the distillation column formed by a plurality of columns connected in series is connected with the inlet of the reverse osmosis device, the outlet of which is connected with the shaft; the outlet of the shaft is connected with the inlet of the nanofilter, the outlet of which is connected with the finished product receiver.

This invention provides a long-life Sialon insert, the cutting edge of which is resistant to wear and hard to fracture, and a cutting tool equipped with the Sialon insert.

Provided are a Sialon insert made of a Sialon sintered body including a Sialon phase comprising an α-Sialon and a β-Sialon, and at least one element, originating from a sintering aid, selected from the group consisting of Sc, Y, Dy, Yb, and Lu in an amount of 0.5 to 5 mol % in terms of an oxide thereof, wherein an α-value, which shows the proportion of the α-Sialon in the Sialon phase, is from 10% to 40%; the β-Sialon has a value of Z from 0.2 to 0.7 wherein Z is a variable of the formula Si_6-ZAl_ZO_ZN_8-Z and within a range: 0<Z≦4.2; and the sintered body has an average thermal expansion coefficient of 3.5×10⁻⁶/K or less at temperatures of room temperature to 1000° C., and a thermal conductivity of 10 W/m·K or more at temperatures of room temperature to 1000° C., and a cutting tool comprising a holder equipped with the Sialon insert.

The invention discloses a method for catalyzing air or oxygen to oxidize alkane and cycloparaffin by use of conjugated polymetalloporphyrin. Solid polymetalloporphyrin which has high porosity and specific surface area and is formed by coupling and polymerizing conjugated alkynyl is used as a catalyst for catalytic oxidation of hydrocarbon bonds of the alkane and the cycloparaffin under a gentle condition so as to obtain a corresponding oxidation product such as ketonic acid and the like. The amount of the used catalyst is small, and the catalytic effect is good. The catalyst is not dissolved or decomposed in a reaction system and can be recycled for lots of times. The transformation rate of the hydrocarbon bonds in catalytic oxidation is high and good alcohol ketone selectivity is achieved.

The invention discloses a method for catalytic oxidation of toluene and substituted toluene to form aldehyde and alcohol by conjugated polymer metalloporphyrin. The method comprises that solid metalloporphyrin having high porosity and high specific surface area and obtained by conjugated alkynyl coupling polymerization is used as a catalyst, and toluene or substituted toluene undergoes a catalytic oxidation reaction in the presence of the catalyst under mild conditions to produce corresponding aldehyde and alcohol oxidation products. The catalyst has a less use amount and good catalysis effects. The catalyst is nonsoluble and is not decomposed in the reaction system and can be recycled at multitimes. The method has a high toluene catalytic oxidation conversion rate and good aldehyde and alcohol selectivity.

The invention provides a preparation method of an evaporation ITO particle. The method comprises the following steps performed in a non-pressure sintering furnace: (1) heating an ITO green body in anoxygen flowing environment to 180-240 DEG C at the heating speed of 10-100 DEG C per hour, then heating to 400-600 DEG C at the heating speed of 10-30 DEG C per hour, and preserving the heat for 1-4 hours after finishing heating; (2) heating in the oxygen flowing environment to 1300-1500 DEG C at the heating speed of 100-200 DEG C per hour, and conducting non-pressure oxygen sintering, wherein thesintering time is 1-10 hours. The preparation method simplifies the control conditions for the preparation of a powder, is favorable for separately controlling the quality of the powder, simplifies the forming, degreasing and sintering process, and is the first case among the domestic preparation methods of the ITO particle. The invention also provides the ITO particle. The ITO particle meets thetechnical requirements of the vacuum evaporation method, is uniform in structure, and does not crack easily.

The invention provides a preparation method of a vitamin K2 compound. The preparation method comprises the following steps that a compound shown by the formula 2, a carbonyl protective agent and a bromination agent undergo a reaction to produce a compound shown in the formula 3; the compound shown in the formula 3 and a long-chain olefin metal compound undergo a reaction in the presence of catalysts to produce a compound shown in the formula 4; and the compound shown in the formula 4 reacts under an acid catalysis condition to produce a compound shown in the formula 1, wherein n represents an integer of 0 to 10, such as 1, 3, 6 or 8; and R represents C1-C4 of O,O-, O,S- and S,S-ketal and acetal (comprising annular ketal and acetal), O,O,O-orthoester, O,S,S-orthoester, S,S,S-orthoester, alkenyl ether, sulfo-alkenyl ether and enamine. The preparation method has the advantages of mild reaction conditions, less side reactions, poor product decomposability, relatively simple deprotection reaction conditions and high yield.

The invention provides an environment-friendly multifunctional scouring agent and a preparation method thereof. The environment-friendly multifunctional scouring agent contains no banned substances such as alkylphenol polyoxyethylene or adsorbable organic halides, etc., is easy to dissolve in water, is resistant to acid, alkali and hard water, is low-foam, and is convenient to use. By integratingpenetration, emulsification, chelating, dispersion and hydrogen peroxide stabilization through the environment-friendly multifunctional scouring agent, pretreatment process is simplified, rationalizedand economized, and is energy-saving and environmentally-friendly. The environment-friendly multifunctional scouring agent is of great revolutionary significance for a traditional process, is widelyapplicable to cotton and blended fabrics process, can be used for conventional desizing, boiling and bleaching process as well as short-process cold batching process, and can achieve good desizing rate, whiteness and capillary effect. In addition, the environment-friendly multifunctional scouring agent also has chelating ability, can chelate metal ions in work bath, prevent the influence of metalions on pretreatment and dyeing, and is helpful for raising product quality.

The invention provides a preparation method of a solid slow-release carbon source for biological denitrification nitrogen removal. The preparation method comprises the following steps: dispersing starch and polysulfone into dimethylacetamide, heating, stirring and uniformly mixing, pouring into a mold, and immersing into water for molding; and immersing the preliminarily formed carbon source intowater, and drying after phase inversion is completed to obtain the product. The preparation method is simple and convenient, high in operability and low in cost. The slow-release carbon source provided by the invention has a good carbon source controlled release effect, does not cause secondary pollution in enhanced denitrification, and has a wide application prospect in removal of nitrate in secondary effluent of urban sewage plants.

The invention relates to an earth electrode wind-cooling flat-plate ozone generating unit, and belongs to the technical field of application of gas ionization discharge, plasma chemistry, environmental engineering and the like. The earth electrode wind-cooling flat-plate ozone generating unit is characterized in that both an earth electrode and a discharge electrode are in a rectangular flat-plate mode; the earth electrode and a cooling fin on the rear side are made of the same metal such as composite steel aluminum, stainless steel and titanium; a dense ionization discharge electric field is formed in a narrow gap between the discharge electrode and the wind-cooling earth electrode, and the electric field strength reaches between 100 and 400 kilovolts per centimeter; and electric field parameters are adopted to adjust and control oxygen molecule dissociation, and oxygen atoms, oxygen atom ions and the free radical concentration are generated by dissociative ionization reaction, so that the ozone production quantity and the ozone concentration are controlled, the redecomposition of controllable ozone is realized, and the ozone concentration reaches between 80 and 160 milligrams per liter. The earth electrode wind-cooling flat-plate ozone generating unit has the advantages of using wind cooling to replace water cooling or oil cooling, using the flat-plate ozone generating unit to replace a tube-type ozone generating unit, realizing the wind-cooling flat-plate small ozone generating unit, and highly efficiently generating ozone with high concentration and large production quantity.

The invention discloses a catalyst for a side-chain alkylation reaction of toluene methanol, and a preparation method of styrene. The catalyst comprises: an ordered mesoporous molecular sieve catalystand a methanol oxygen-free dehydrogenation catalyst; and the ordered mesoporous molecular sieve catalyst is doped with alkali metal ions. The catalyst utilizes the better dehydrogenation performanceof the methanol oxygen-free dehydrogenation catalyst to produce a true alkylation reagent formaldehyde, and on the other hand, the alkali metal ion-modified mesoporous molecular sieve catalyst has excellent side-chain alkylation performance, the products styrene and ethylbenzene are obtained, and higher toluene conversion and styrene ethylbenzene selectivity can be obtained. The invention also provides the preparation method of styrene by using the catalyst.

The invention discloses a method for recycling iron ore concentrate in copper slag floating copper tailings through microwave low-temperature reduction roasting, and belongs to the technical field of metal element recycling. The method comprises the steps of microwave pretreatment, wet-type low-intensity magnetic separation and reverse flotation. According to the invention, microwave pretreatment is adopted, the catalytic action and selective heating characteristics of microwaves on the reaction are utilized, the composite additives (calcium oxide and sodium carbonate) are adopted to assist the microwaves to conduct weak reduction roasting on the copper slag at the temperature lower than 1000 DEG C, so that the purposes of copper slag resource ore phase reconstruction and catalytic in-situ reduction are achieved, the phase composition in the copper slag is improved, an iron phase in the slag is subjected to a decomposition reaction; and meanwhile, roasting products are treated through magnetic separation and reverse flotation, particularly flotation is assisted by a mixed collecting agent, the iron ore concentrate grade can be further improved, the recovery rate is high, the process is simple, energy consumption is low, and environmental protection is achieved.

The invention provides a body weight management composition containing plant exosomes and a preparation method thereof. The body weight management composition containing plant exosomes, medium chain triglyceride microcapsule powder, plant fat powder, erythritol, coconut powder, polydextrose, L-arabinose, a flavor regulator, an additive and resistant dextrin. Through the synergistic effect of various raw materials, fat in the body can be quickly combusted to generate ketone bodies, the effects of increasing satiety, controlling decomposition and absorption of carbon water, avoiding fat accumulation and the like are achieved, and the weight losing effect is achieved. The preparation method provided by the invention is simple in production process, low in energy consumption, high in safety, wide in applicability and suitable for industrial production.