32results about How to "Improved pore distribution" patented technology

The invention provides mordenite and a preparation method thereof. The mordenite has an ellipsoidal structural topography formed by stacking a plurality of strip zeolite crystals in the one-dimensional direction in order; and the method for preparing the mordenite with the special structural topography comprises that: a solid silicon-aluminum source raw material is subjected to two-stage crystallization reaction in an extremely thick system, the molar ratio of water to silicon dioxide in the crystallization system is 1-7, the structural topography of the obtained mordenite is obviously difference from that of the conventional product by optimizing and controlling synthesis process and condition parameters, and mesopores and macropores are introduced into the mordenite structure to contribute to solving the problems of dislocation and surface defects of the mordenite structure and better contribute to improving the catalytic performance in xylene isomerization reaction. The invention also provides application of the mordenite with the special structural topography to catalysis in the xylene isomerization reaction.

Disclosed is a method of preparing propylene by oxygen-containing compounds. The method comprises the following steps that: the oxygen-containing compounds contacts and reacts with a spent catalyst and/or a regenerated catalyst in a first reactor; after having a contact reaction with a regenerated catalyst in a second reactor, ethylene and light olefins are introduced into a third reactor for a further reaction. The catalyst in the first reactor is a spent catalyst and/or a regenerated catalyst, and contains modified medium pore zeolites. According to the method of preparing propylene by oxygen-containing compounds provided in the invention, propylene prepared has high selectivity.

The invention discloses a lightweight high-strength gangue baking-free brick, which is prepared from the following ingredients: gangue, basalt powder, electrolytic manganese residue, ceramic powder, glass powder, red mud, limestone, arsenic sandstone, water glass, a modifier, a cementing material, boron mud and a proper amount of water. The production technology of the baking-free brick is simple, and the cost is low. Through synergism of the materials, the prepared baking-free brick is endowed with high strength, low thermal conductivity and good crack resistance, is energy-saving and environment friendly, meets requirements of constructional engineering, and accords with environmental protection requirement. The baking-free brick has excellent high and low temperature resistance. Problems of general baking-free bricks, such as poor crack resistance and frost resistance, are solved. The application range of baking-free brick is greatly broadened.

The invention discloses a method for producing premixed copper-tin 10 bronze. The method comprises the steps that copper powder is subjected to water atomization by a conical spray tray and then is subjected to thermal treatment, the copper powder subjected to thermal treatment is crushed and subjected to oxidation resistance, and raw material copper powder is obtained through screening; the prepared copper powder and tin powder are evenly mixed according to the mass fraction; the powder is subjected to thermal treatment in a reducing atmosphere, and copper powder particles and tin powder particles are bonded with each other in a diffusion mode in the thermal treatment process; the thermal treatment powder is crushed, and powder is obtained through screening; a lubricating agent is added into the powder to be mixed evenly. According to mixed bronze powder produced by the method, the water atomization copper powder in irregular shapes is used and then is subjected to thermal treatment, so that the raw material copper powder has good toughness, and composition segregation of the bronze powder is avoided; in addition, the water atomization copper powder is likely to form communicated pores after being sintered, and the environment can not be polluted by the water atomization method for producing the bronze powder. The premixed bronze prepared by the method is free of composition segregation, stable in apparent density, good in forming property and high in sintered strength; well distributed pores are formed in a sintered mode.

The invention discloses a coal gangue baking-free brick with mouldproof and antibacterial effects. The coal gangue baking-free brick is prepared from coal gangue, basalt powder, electrolytic manganese residue, hemp fiber, chitosan, red mud, limestone, aluminum dihydrogen phosphate, water glass, modifier, cementing material, boron mud and a proper amount of water. The baking-free brick is easy to produce and low in cost. Through the synergistic effect of different materials, the prepared baking-free brick is high in strength, low in heat conductivity coefficient, good in anti-crack effect, energy-efficient and environmentally friendly, and meets constructional engineering requirements and the requirement for environment protection; besides good mouldproof, antibacterial and pest killing effects, excellent performances including light weight, high strength, heat insulation, sound insulation and low water absorbability are realized; the baking-free brick has excellent high and low temperature resistance, the problems of ordinary baking-free bricks of being poor in crack resistance and freezing resistance are solved, and the application range of the baking-free brick is widened greatly.

The invention provides a negative electrode piece and a lithium ion battery. The negative electrode piece comprises a negative electrode current collector and a negative electrode diaphragm, and the negative electrode diaphragm is formed on one side or two sides of the negative electrode current collector. The negative electrode diaphragm comprises an inner active material layer which is located on the negative electrode current collector and is adjacent to the negative electrode current collector, contains a negative active material capable of removing lithium ions; and an outer functional layer located on the inner active material layer and located on one side, away from the negative electrode current collector, of the negative electrode diaphragm, the outer functional layer comprises super p and a binding agent, and does not contain a negative active material capable of removing lithium ions. The negative electrode piece can rapidly improve the low-temperature performance of the lithium ion battery, the power performance and the high-current fast-charging cycle performance.

The invention relates to a lithium battery pole piece coating method, which comprises the step of synchronously coating conductive carbon layer slurry, lithium battery slurry and PVDF (Polyvinylidene Fluoride) glue solution slurry on the surface of a foil from inside to outside through a multi-layer slope flow coating process. According to the lithium battery pole piece coating method provided by the invention, the pore distribution of the coating layer of the prepared positive/negative pole piece can be optimized, a positive pole piece and a negative pole piece prepared by the method provided by the invention can be matched and assembled with an existing common diaphragm to form a lithium battery cell, and the lithium battery cell has relatively good wettability and rate charge-discharge performance.

The invention discloses a catalyst used for preparing isobutene, and a preparation method thereof. The catalyst is a core-shell catalyst, amorphous silica-alumina is taken as the core, and the shell is silicon and stannum modified aluminium oxide. Organic combination of the core with the shell is capable of realizing isobutene production via simultaneous MTBE pyrolysis and TBA dehydration, conversion rate of TBA and conversion rate of MTBE are both high, and selectivity of production of isobutene is relatively high.

The invention provides reclaimed rubber particle permeable asphalt concrete and a preparation method thereof. The preparation method comprises the following steps that S1, a modifier and various auxiliaries are added into matrix asphalt to be stirred and sheared, and a mixture is obtained; S2, storing and developing are carried out to prepare SBS modified asphalt; S3, the SBS regenerated rubber particle modified asphalt is prepared; and S4, the regenerated rubber particle permeable asphalt concrete is prepared. After the regenerated rubber particles are mixed with the SBS modified asphalt, light components in the modified asphalt are absorbed, and the viscosity of the modified asphalt is increased, so that the thickness of a coating aggregate asphalt film is increased, and the cohesive force among aggregate particles is effectively improved. The colloidal particles have excellent elastic performance; when internal pores of the water-permeable asphalt concrete are frozen and heaved at extreme temperature, the freezing and thawing resistance of the water-permeable asphalt concrete is improved, the durability of the water-permeable asphalt concrete is improved, the pore distribution of the water-permeable asphalt concrete can be optimized by the reasonably graded rubber particles, the pore blockage of the water-permeable asphalt concrete is delayed, and the water-permeable function of the water-permeable asphalt concrete is guaranteed.