53results about How to "Give full play to the catalytic effect" patented technology

The invention discloses a method for synthesizing dimethyl isophthalate-5-sodium sulfonate. Dimethyl isophthalate-5-sodium sulfonate is prepared by steps of sulfonation reaction, esterification, neutralization reaction and aftertreatment with isophthalic acid and fuming sulfuric acid serving as raw materials, wherein the sulfonation reaction is completed in three reaction temperature zones, different catalysts are used in different reaction temperature zones, cadmium sulfate is used as the catalyst at the temperature ranging from 150 DEG C to 159 DEG C, SiO2 is used as the catalyst at the temperature ranging from 160 DEG C to 169 DEG C, and mercuric sulfate is used as the catalyst temperature ranging from 170 DEG C to 181 DEG C. By the method, sulfonation reaction effect is improved, conversion rate of isophthalic acid is increased, sulfonation reaction temperature is lowered while sulfonation reaction time is shortened, reaction by-products including disulfonate, polymer and sulfone compounds are greatly reduced, product purity is improved while product yield is increased, and further, usage of fuming sulfuric acid and usage of sodium carbonate in a subsequent neutralization procedure are reduced, so that production cost is reduced.

The present invention is a kind of magnesium base composite material, this material contains (weight): 0.5~5.0% nano titanium oxide (TiO 2 ), 1.0 to 3.0% Cr, 5.0 to 15.0% Ni, and remaining Mg. It can reversibly absorb and desorb hydrogen at low temperature, has high hydrogen storage capacity, good activation performance and excellent kinetic performance of hydrogen absorption and desorption. It can be used to manufacture hydrogen sources, facilitate the purification, storage and transportation of hydrogen, and can also be used as hydrogen storage materials for fuel cells.

The invention relates to a composite carrier of an alumina-coated molecular sieve, a hydrocracking isomerization catalyst, and a preparation method and application thereof. Firstly, a molecular sieveis subjected to an amino acid pore broadening treatment; then the molecular sieve is sulfonated, the sulfonated molecular sieve is added into an alcohol-water solution containing hexadecyl trimethyl ammonium bromide, an aluminum source and urea are added, and then crystallizing, washing, drying, and roasting are performed to obtain the composite carrier, which has abundant pores and abundant acidic sites, thereby enhancing the hydro-isomerization performance. Pt, Pd, Ni and Co are used as main active metals; Na, K, Be, Mg, Ca, Sr, Cr, Mn, Fe, Cu and Zn are used as auxiliary metals; and the auxiliary metals can enhance the dispersity of the active metals, can selectively cover and inhibit the acidic sites of the molecular sieve, play a key role in hydrogenation activity, and have higher activity in the aspect of preparation of biofuel from long-chain alkane through hydro-isomerization.

The invention discloses a garbage incinerator system and a method for catalytic removal of garbage incinerator flue gas purification furnace, comprising a garbage incinerator, the flue gas outlet of the garbage incinerator is connected to a flue, the flue gas outlet of the garbage incinerator is provided with a heat exchange device, and the garbage incinerator The garbage input port of the furnace is equipped with a mixing device, which is connected to the garbage source and the chlorine inhibitor source. The furnace wall of the boiling section of the garbage incinerator furnace is equipped with an insulating high-temperature catalyst layer, and the furnace wall of the suspension section of the garbage incinerator furnace wall and the inner wall of the flue are provided with insulation Medium-temperature catalyst layer and heat storage ball layer are laid on the surface of the heat exchange device; chlorine inhibitor is formed by compounding sulfur-containing carbon and calcium oxide; heat-insulating high-temperature catalyst is formed by compounding refractory material and high-temperature catalyst; heat-insulating medium-temperature catalyst is formed by compounding refractory material and medium-temperature catalyst Formation; heat storage balls contain catalytically active components. The invention can effectively reduce the cost of the out-of-furnace treatment of flue gas and fly ash, effectively realize the inhibition in the process of dioxin formation and the decomposition of incineration products.

The invention relates to a device for synthesis of dimethyl carbonate by methanol carbonyl oxidization, the device includes a tubular reaction segment, the upper end of the tubular reaction segment is a reactor gas-liquid separation section, the upper part of the tubular reaction segment is provided with a methanol feeding port, the lower part of the tubular reaction segment is provided with a CO and O2 mixed gas feed port, and also provided with an external circulating pipeline extending from the bottom of the tubular reaction segment to the methanol feeding port at the upper part of the tubular reaction segment, the external circulating pipeline is provided with a centrifugal pump, and the centrifugal pump can forcibly delivery a gas-liquid reaction raw material on the bottom of the tubular reaction segment to the top of the tubular reaction segment. The device for synthesis of the dimethyl carbonate by methanol carbonyl oxidization replaces a reflux vice reaction tube by the circular pipeline with the centrifugal pump, can effectively prevent the local deposition of a catalyst in a reactor, strengthens cycle of the catalyst in the device, significantly increases the contact area, and gives full play to the catalytic effect of the catalyst.

The invention discloses a method for catalytic conversion of biomass. The method comprises steps as follows: (1), collected bean curd swill is naturally fermented, and biomass is naturally air-dried and then broken; (2), the fermented bean curd swill and the broken biomass are mixed in the mass ratio being (1:1)-(10:1) and sent to a reaction kettle; (3), the reaction kettle filled with a mixture of the bean curd swill and the biomass is heated for carbonization, and after the reaction ends, and solid products are obtained through cooling, collection, filtration and separation and can be taken as fuel or chemical raw materials. The fermented bean curd swill is taken as a solvent, biomass is subjected to hydrothermal conversion, and the catalytic action of rich lactic acid and succinic acid contained in the bean curd swill is sufficiently exerted. The hydrothermal conversion technology is controlled at the two-stage reaction temperatures, the lactic acid and the succinic acid in the fermented bean curd swill are dissolved in water and can be sufficiently spread into the biomass, and the catalytic effect of the bean curd swill is improved.

The invention discloses an expanded halogen-free flame-retardant EVA-based composite material and a preparation method thereof. The preparation method is characterized in that a synergistic flame retardant, namely Zirconate-Amino Trimethylene Phosphonic Acid (Zr-ATMP) is synthesized under hydrothermal conditions by taking nitrogen-based trimethylene phosphoric acid and zirconium oxychloride as raw materials; the flame-retardant composite material is prepared from EVA, a char-forming agent (starch), a flame retardant and the synergistic flame retardant in manners of extrusion and dicing; the mass percentage ratio of the EVA to the char-forming agent to the flame retardant to the synergistic flame retardant is 50:12.5:(35.5-32.5):(2-5). The composite material has the advantages that the raw materials are poisonless and harmless, the preparation way is simple and safe, a role in obviously improving the flame retardance and the mechanical property of the EVA is played, particularly, a role in obviously promoting char forming is played during combustion, and the molten drop phenomenon is eliminated.