46results about How to "Increase microporosity" patented technology

Compositions and methods for preparing mesostructured zeolites having improved hydrothermal stability. Such mesostructured zeolites can be prepared by subjecting a zeolite to rare earth ion exchange prior to and / or subsequent to introducing mesoporosity into the zeolite.

The invention discloses a preparation method of a compound adsorbent mixture, an adsorbent particle and a compound adsorbent for purifying VOCs and belongs to the field of atmospheric VOCs treatment. The method comprises the steps of adding a mixture A and a mixture B to a mixer, adding water to mix and mixing evenly; and adding an additive to the mixer and mixing evenly to prepare the adsorbent mixture, wherein the mixture A comprises activated aluminum oxide, activated carbon and iron ore powder; and the mixture B comprises a pellet sieve residue, a biomass material, magnesium laterite-nickel ore and kaolin. The adsorbent has relatively high porosity and specific surface area; and when the VOCs are in contact with the adsorbent, the adsorbent can be in full contact with the VOCs, and the adsorption efficiency of the adsorbent is improved, thereby achieving high-efficiency and low-cost emission reduction of the VOCs.

The invention relates to a wound filling dressing for the closed negative pressure drainage of a surgical wound as well as a preparation method. The wound filling dressing mainly comprises a vegetable sponge matrix, micropore fabrics, a semi-transparent film and a negative pressure drainage duct, wherein the vegetable sponge matrix is matched with the wound in the shape, the micropore fabrics arerespectively arranged on the upper surface and the lower surface of the vegetable sponge matrix or wrapped on the surface of the vegetable sponge matrix, the semi-transparent film covers the upper surface of the vegetable sponge matrix to take the closing and fixing action, and the negative pressure drainage duct is inserted in the vegetable sponge matrix. The invention has low cost, simple structure, convenience of manufacture and low raw material and manufacture costs being only about one percent of a similar product, and can greatly decrease the medical cost and accordingly be favorable tothe popularization of a closed negative pressure suction technology.

The invention provides a soil ventilation improving synergist containing iron tailings and a preparation method thereof. The soil ventilation improving synergist comprises, by weight, 1 part of tailings, 0.01-0.1 part of crop straws and 0.01-0.1 part of polyvinyl alcohol. After the soil ventilation improving synergist is added into the soil, soil trace elements can be added, soil aggregate is increased, porosity of the soil is increased, soil ventilation is improved, and improvement of activity of microorganisms and enzyme in the soil is promoted. Hydroxyl on a polyvinyl alcohol high molecular chain on the surface of a tailings particle can be attached to soil particles, and soil aggregate and fine pores of the soil are further increased. Crop straw particles processed through decomposing can improve a biochemical property of cohesive soil, provides abundant organic substances for the soil, stimulates the microorganisms in the soil to grow and move, and improves fertilizer retaining and fertility improving capacity of the soil. The soil ventilation improving synergist is low in cost, simple in preparation process, favorable for popularizing. Simultaneously, double effects of chemical modification and physical modification are achieved simultaneously, and the effects are remarkable.

The invention discloses a preparation method of mesoporous ceramic. The mesoporous ceramic is prepared by taking a traditional pore-forming agent clad with an organic metal framework compound as a novel ceramic pore-forming agent, wherein the organic metal framework compound is a coordination polymer, has a three-dimension porous structure and is a high-stability mesoporous material taking metal ions as connection points; meanwhile, the surface of the traditional pore-forming agent is subjected to polydopamine membrane cladding treatment to improve the complexation of the metal ions on the surface of the traditional pore-forming agent, thereby realizing the high-efficient cladding of the organic metal framework compound. The novel pore-forming agent has good pore-forming capability equal to that of the traditional pore-forming agent, and also endows traditional ceramic pores with multidimensional mesoporous structures, the micropore performance of ceramic is obviously improved, and a prepared ceramic product is higher in porosity and more uniform; in addition, the metal ions can be converted into metal or metal compounds in a sintering process, so as to further improve the comprehensive performance of a ceramic body.