31results about How to "Give full play to the adsorption effect" patented technology

The invention relates to a method for grading catalysts for hydrofining of inferior distillate oil. A hydrogenation reactor is divided into three sections of reaction regions sequentially from top to bottom, wherein a hydrogenating protective agent is filled in the first section of reaction region; a hydrofining agent A is filled in the second section of reaction region and is characterized in that the catalyst adopts Al2O3-TiO2-SiO2-ZrO2 quaternary composite oxide as a carrier, W-Mo-Ni ternary metal as an active metal component and P as an aid; and a hydrofining agent B is filled in the third section of reaction and is characterized in that the catalyst adopts Al2O3-SiO2-ZrO2 ternary composite oxide as a carrier, W-Mo-Ni ternary metal as an active metal component and P and F as aids. The method is used for grading different systems of catalysts reasonably, wherein due to combination of the hydrofining agent A with large pore volume, large specific surface area and high surface acid quantity and the ternary metal component with high activity, certain desulfuration and deep denitrogenation effects are achieved, and the influence of azacyclo compounds on the desulfurization activity of the catalyst in the next step is reduced; and due to the hydrofining agent B and the deep desulfurization performance of the catalyst, ultralow sulfur diesel oil with the sulfur content meeting the European IV standard is obtained finally.

The invention relates to a ladle slag modifier for the stainless steel refining process, which comprises the following components in percentage by weight: 38 to 50 percent of CaO, 22 to 28 percent of SiO2, 5 to 10 percent of Al2O3, 5 to 10 percent of CaF2, 3 to 8 percent of Ca-Si, 2 to 5 percent of MgO and 5 to 10 percent of B2O3, wherein the particle size of the modifier is 3 to 15mm. The ladle slag modifier for the stainless steel refining process modifies and reduces ladle slag subjected to argon oxygen decarburization (AOD) tapping in the stainless steel smelting process to control the alkalinity and reduce the oxidability of the ladle slag, so that the ladle slag has the function of improving the cleanliness of stainless steel, and the quality of the stainless steel is further improved.

The invention discloses a compound refined diatomite sewage dephosphorization agent. The compound refined diatomite sewage dephosphorization agent comprises 67-75% of modified refined diatomite, 24-32% of a polymeric diacid flucculant and 1-2% of a cationic organic polymer flocculant. The compound refined diatomite sewage dephosphorization agent has the advantages that the modified diatomite has efficient adsorption effects and the polymeric diacid flucculant and the cationic organic polymer flocculant are conducive to obvious improvement of aggregation and flocculation effects of suspended sludge blankets in a biological aeration tank or a sedimentation tank, thus the dephosphorization efficiency of sewage treatment is greatly improved; and compared with the traditional chemical dephosphorization technology only adopting an aluminium salt or a ferric salt, a technology adopting the compound refined diatomite sewage dephosphorization agent has higher treatment efficiency and a lower operation cost.

The invention discloses an ecological remediation-type precast concrete plank and a method for reconstructing a river hard protection bank as well as restoring riverbed, wherein the precast concrete plank employs concrete to precast, the concrete comprises the following components: 400-700kg / m<3> of porous aggregate; 200-250kg / m<3> of low alkalescence cementing material, 40-60kg / m<3> of granular repairing agent, 3-7kg / m<3> of high efficiency additive and 50-90kg / m<3>. The ecological reconstruction method that the ecological remediation-type precast concrete plank is employed at bottom of original hard protection bank and riverbed has the advantages of saved resource, less investment, short construction period and fast effectiveness, and overcomes the difficulty of underwater construction of the concrete. Through the reconstruction method, a water and land ecological system chain is improved, pollutants such as an organic matter, nitrogen and phosphorus and heavy metals in water can be simultaneously absorbed, then pollutants can be removed through combined action of animals and plants as well as microbes, in-situ regeneration of an adsorbent is realized, adsorption capacity enables in-situ recovery, and long-term continuous ecological water purification effect can be reached.

The invention provides a steel ladle slag reducing agent with high calcium oxide content, which comprises the components by mass percent: 42-48% of Al, 18-28% of CaO, 0.5-2.0% of SiO2, 15-22% of Al2O3, 3-8% of CaF2 and 1-4% of MgO. The steel ladle slag reducing agent has high calcium oxide content, and other components are synthesized at the same time, so that the steel ladle slag reducing agent is good in a metal-slag reaction and rapid in slagging, and is capable of realizing the reduction on steel ladle slag and giving full play to the desulfuration and deoxidation functions of steel ladle slag on molten steel as well as the adsorption function of the steel ladle slag on impurities; therefore, the cleanliness of the molten steel can be improved.

A cyclodextrin nanocluster modified graphene membrane material, which uses graphene as a carrier, cyclodextrin is connected on the graphene sheet by a method of functional group reaction, and at the same time self-assembles on the graphene surface to form nanoclusters , the graphene is obtained by reducing various types of graphene oxide through various methods, and the cyclodextrin is α, β, γ cyclodextrin substituted by various functional groups. Graphene provides a carrier for cyclodextrin nanoclusters and provides a channel for water filtration, so that cyclodextrin can fully exert its adsorption effect on bisphenol A, and at the same time make the whole removal process simple and fast; while the graphene membrane itself has The nanofiltration effect also greatly improved the removal efficiency of bisphenol A. The invention discloses its preparation method.

The invention discloses an aluminum profile anodic oxidation electrolyte, a preparation method thereof, and an anodic oxidation process of an aluminum profile, which belong to the technical field of electrolysis or electrophoresis, and consist of phytic acid, fulvic acid, a pH regulator and water. The concentration of acid in the electrolyte is 70-90g / L, the concentration of fulvic acid in the electrolyte is 35-55g / L, and the pH value of the electrolyte is 2.0-2.8. On the one hand, phytic acid mainly comes from the roots, stems and seeds of plants, while fulvic acid can be used for medical treatment, so the electrolyte composed of the two as the main components is completely non-toxic and harmless, and is green. Environmentally friendly; on the other hand, it can adsorb aluminum ions dispersed in the solution, and the complex formed by phytic acid and aluminum ions to the vicinity of the aluminum profile, assisting in sealing pores, and also forming phytic acid and Al on the surface of alumina 3+ The complex compound produces a dense hydrophobic protective film, which slows down the chemical dissolution of the oxide film by the electrolyte, improves the performance of the film layer, and enhances the corrosion resistance of the oxide film.

The invention discloses a system for treating heavy metal wastewater. The system comprises an aeration pond, a neutralization pond, a flocculation pond, a thickening pond, a mechanical filtering tank, an absorption column, and functional wetland which are connected sequentially, and also comprises a ferric salt feeding system and a sludge backflow system. The concentration of Fe<3+> in wastewateris improved by aerating and feeding ferric salt, and the concentration of lead, arsenic and cadmium in a solution is reduced by using a Fe<3+> co-precipitation effect, and an adsorption effect of active iron hydroxide; by backflow of sludge, the feeding amount of lime is reduced by 5 to 10 percent, and the water treatment capacity is improved by 1 to 3 times; a high-flux large-aperture resin loaded with ferric hydroxide is used as adsorbent which has a strong effect of adsorbing the lead, arsenic and cadmium in wastewater, and effluent meets the requirement of V-grade water body of 'environmental quality standard of surface water' (GB3838-2002); and the functional wetland fully exerts the adsorption effect of filler on heavy meal, and an enrichment effect of plant, and the effluent reaches the requirement of III-grade water body.

The invention discloses a preparation method of an octenyl succinic acid water-soluble starch ester. The method comprises the following steps: grinding dry ore materials, screening and evenly mixing with octenyl succinic anhydride; then dripping a water-soluble starch solution into a mixture of the ore materials and the octenyl succinic anhydride and reacting under an alkaline condition; and finally, regulating a pH value to reach acidity, centrifuging after oscillating, taking out a supernatant and drying, thereby obtaining the octenyl succinic acid ester of the water-soluble starch. The method has the advantages that the octenyl succinic acid water-soluble starch ester with high substitution efficiency and low octenyl succinic acid residue quantity can be prepared by directly utilizing the water-soluble starch.

The invention relates to a carbon nano tube / chitosan mesoporous spherical composite material as well as a preparation method thereof. The preparation method of the spherical composite material comprises the following steps: (1) carrying out acid treatment and dispersion treatment on carbon nano tube raw materials; (2) preparing a chitosan solution with the degree of deacetylation of 80-100%; (3) adding the carbon nano tube which is treated by the step (1) into the chitosan solution obtained by the step (2), and mixing uniformly so as to a spherical liquid; (4) dissolving alkaline solute into water so as to obtain a solidified liquid; (5) dropwise adding the spherical liquid into the solidified liquid so as to prepare a composite sphere; (6) placing the composite sphere generated by the step (5) into a crosslinking agent solution to crosslink, and stirring so as to obtain a crosslinking composite sphere; (7) refrigerating and drying the crosslinking composite sphere obtain by the step (6) so as to obtain the carbon nano tube / chitosan mesoporous spherical composite material. The carbon nano tube / chitosan mesoporous spherical composite material disclosed by the invention is nontoxic, and has favorable adsorption performance.

The invention discloses carbon nano tube / activated carbon mesoporous composite pellets and a preparation method thereof. The preparation method comprises the following steps that 1, a carbon nano tube is subjected to acid treatment and disperse treatment; 2, the carbon nano tube treated in the step 1 is evenly mixed with pelleting auxiliary materials and a wetting agent; 3, the mixed material obtained in the step 2 is pelletized, and precursors are obtained; 4, the precursors obtained in the step 3 are carbonized and activated to obtain the carbon nano tube / activated carbon mesoporous composite pellets. The pellets prepared through the preparation method are good in sphericity and uniform in size, solves the problem that the carbon nano tube is large in elasticity modulus, poor in flowability and not likely to be pelletized, is nontoxic and has good adsorptive property.