541results about How to "Large pore volume" patented technology

The invention relates to a modified loading nano composite photocatalyst which takes titanium dioxide as main part and adopts new reaction technique to degraded the organic industrial wastewater in a water processing system (see attached drawing 1 in Instruction). The main point on preparing the catalyst lies in that titanium dioxide active compounds loaded on different carriers are employed to prepare a loading photocatalyst with grain diameter of 5-40nm; meanwhile, different elements are mixed into the loading photocatalyst to reduce the composition between photoproduciton electron and cavity, which enables the catalyst to move the light absorbing wavelength thereof towards the visible regions, thus effectively improving the degradation rate of organic pollutants as a new environmental-friendly catalyst. As to the new technique of processing the organic industrial wastewater, the invention overcomes the defects that the present photocatalysts are only used for degrading the organic industrial wastewater with low concentration. The catalyst being irradiated respectively or simultaneously under sunbeam and ultraviolet light can decrease COD values of high-concentration organic industrial wastewater from 10000-40000mg / L to less than 100mg / L in short time, thus meeting the national emission standard.

The invention discloses a preparation method of a sound absorbing material, the sound absorbing material and a filling method of same. The preparation method comprises the following steps: (S1) preparing a non-foamed slurry material; (S2) producing a flammable material framework and a shape-cover container, and placing the flammable material framework into the shape-cover container; (S3) forming the non-foamed slurry material in the shape-cover container to form a wet formed body; (S4) drying the wet formed body to form a dry formed body; and (S5) roasting the dry formed body, wherein the flammable material framework is burned off during the roasting step to form three-dimensional throughout channels. The preparation method is simple in operations. The three-dimensional throughout channels are formed in the sound absorbing material so that sound absorbing effect is improved. The sound absorbing material, which is prepared through the preparation method disclosed in the invention, has the three-dimensional throughout channels therein, so that the sound absorbing material is good in the sound absorbing effect. The filling method includes the steps of pre-fabricating the sound absorbing material and filling it into a to-be-filled space, so that the sound absorbing material is fully filled in the to-be-filled space.

The present invention relates to an acidic amorphous silica-alumina having large specific surface area and a large pore volume, a carrier complex and a hydrotreating catalyst containing said acidic amorphous silica-alumina, in particular a hydrocracking catalyst containing said acidic amorphous silica-alumina in combination with a modified zeolite-Y for treating petroleum hydrocarbon materials to produce middle distillates, and processes for the preparation thereof. Said amorphous silica-alumina has a SiO2 content of 10-50 wt %, a specific surface area of 300-600 m2 / g, a pore volume of 0.8-1.5 ml / g and an IR acidity of 0.25-0.60 mmol / g. The catalyst according to the present invention shows a relatively high activity and mid-distillate selectivity and can be particularly used in hydrocracking process for producing mid-distillates in a higher yield.

A process for preparing the nano-class composite photocatalyst includes such steps as preparing TiO2 aerogel by supercritical technique, and osmosizing metallic ions into TiO2 main body. Its advantages are high catalytic activity, wide trigger range moving from UV to visual light, and high degradability to hydrocarbon, oily sewage and more pollutants.

The invention discloses a magnetic carrier iron ordered mesoporous carbon. The ordered mesoporous carbon is taken as a carrier, the carrier is prepared by a hard template method, and magnetic nanoparticles are loaded onto the carrier by a nano-joint casting method; the magnetic nanoparticles mainly consist of zero-valent iron and oxide of iron, wherein the proportion of the iron element is taken as 1-1.5m mol of each gram of a mesoporous silicon template, and the pore diameter distribution of the mesoporous carbon is mainly concentrated nearby 5nm and 3.8nm. A perpetration method of the magnetic carrier iron ordered mesoporous carbon provided by the invention comprises the following steps of: dissolving iron source materials and cane sugar in sulfuric acid, dipping the mesoporous silicon template, and adopting two-section type heat treatment; secondly, dipping by cane sugar-containing sulfuric acid solution, and adopting two-section type heat treatment; and finally carrying out constant-temperature high-temperature carbonization so as to obtain the silicon template in a demoulding way by hot NaOH solution, and drying to obtain the magnetic carrier iron ordered mesoporous carbon. The magnetic carrier iron ordered mesoporous carbon disclosed by the invention has the characteristics of being large in specific surface area and pore volume, wide in application range, stable in physicochemical property and the like, and the heavy metal hexavalent chromium ions in water body can be removed.

A process for modifying kaolinite includes such steps as proportionally mixing kaolinite, dispersing modifier, acid solution and deionized water, beating, calcining, cooling, and washing with deionized water. The modified kaolinite has large specific surface area and pore volume, and high catalytic activity.

The invention provides a hydrorefining catalyst special for new coal tar, a preparation method and an application method thereof, which are used for solving problems existing in the conventional hydrogenation catalyst for coal tar. The hydrorefining catalyst consists of active components, aids and carriers, wherein the active components refer to MoO3 and NiO or MoO3 and CoO; the aids refer to Bi2O3 and K2O; and the carriers refer to alumina and barium oxide. According to calculation by the form of an oxide, the active components, the aids and the carriers account for 15 to 35 percent, 2 to 5 percent and 60 to 83 percent of the total mass of the catalyst respectively. The catalyst is prepared by the following steps of: kneading, grinding, extruding into strips, molding, soaking, performing catalyst post-treatment and the like. New ultrasonic soaking technology is introduced, and the preparation condition of the catalyst is controlled strictly. Compared with the prior art, the catalyst has high surface physical and chemical properties, high purified atom degumming activity, high hydrogenation saturation capability, high stability and high mechanical intensity, and the quality and yield of hydrogenation product oil can be enhanced effectively.

The present invention discloses a method for removing hexavalent chromium in wastewater by using a beta-cyclodextrin chitosan and walnut shell biochar compounded adsorbent, wherein beta-cyclodextrin and chitosan are compounded, and then the beta-cyclodextrin chitosan is grafted on a walnut shell biochar substrate so as to form the complex. The preparation method comprises: compounding beta-cyclodextrin and chitosan, carrying out high temperature calcination on walnut shell biomass powder formed through air-drying and grinding so as to prepare walnut shell biochar, and compounding the beta-cyclodextrin chitosan onto the biochar surface. The application steps comprise: adding the composite material to hexavalent chromium wastewater with a hexavalent chromium concentration of 20-800 mg / L, wherein the use amount of the composite material is 0.1-1 g / L; and carrying out an oscillation adsorption reaction for a certain time at a temperature of 20-50 DEG C under a pH value of 2-9, and collecting the adsorbent through filtration or precipitation separation so as to complete the removal of the hexavalent chromium ions in the wastewater. The method of the present invention has advantages of low cost, simple process, high adsorption performance, effective waste utilization, easy separation, environmental protection, and the like.

The invention relates to a macroporous / mesoporous hollow silica microballoon and its preparation method. The macroporous / mesoporous hollow microballoon is prepared by the following steps of: carrying out self assembly on organic polymer microballoons with different particle sizes to obtain a template, generating a silica outer layer by in situ method, and calcining to remove the internal organic matter. The internal cavity of the microballon obtained is 500-2000nm controllable and the pore diameter of the microballoon surface is 10-100nm controllable, so as to form the macroporous / mesoporous hollow structure. The preparation method provided by the invention has characteristics of simple condition, convenient operation, easily obtained raw materials, pure product, environmental protection and the like. The silica hollow microballoon provided by the invention can be widely applied in a controllable transport and delivery system of medicament, dye, cosmetic and sensitive reagents such as enzyme and protein as a carrier material, can be used as a lightweight filling material, a high selectivity catalyst or a catalyst carrier, and has a very important value in the aspects of artificial cells, disease diagnosis and the like.