News Center

       活性氧化铝应用范围：

　　1、空气、天然气、石油裂解气的干燥脱水

　　2、饮用水除氟

　　3、葸醌法生产双氧水的用催化剂

　　4、粘性树脂脱氯

　　5、催化剂载体

　　6、空分及制氧工业用

　　活性氧化铝属于化学品氧化铝范畴，主要用于吸附剂、净水剂、催化剂及催化剂载体，根据不同的用途，其原料和制备方法不同。活性氧化铝(分子式Al2O(3-x)(OH)2x,0

　　分子式(Formula)： Al2O3 ·nH2O (

　　分子量(Molecular Weight)： 101.96 + nH2O )

　　CAS No.： 1344-28-1

　　该纳米氧化铝XZ-L14显白色蓬松粉末状态，晶型是α型。粒径是20nm;比表面积≥50m/g。粒度分布均匀、度高、高分散、α-Al2O3，其比表面低，具有耐高温的惰性，但不属于活性氧化铝，几乎没有催化活性;耐热性强，成型性好，晶相稳定、硬度高、尺寸稳定性好，可广泛应用于各种塑料、橡胶、陶瓷、耐火材料等产品的补强增韧，特别是提高陶瓷的致密性、光洁度、冷热疲劳性、断裂韧性、抗蠕变性能和高分子材料产品的耐磨性能尤为显著。由于α相氧化铝也是性能优异的远红外发射材料，作为远红外发射和保温材料被应用于化纤产品和高压钠灯中。此外，α相氧化铝电阻率高，具有良好的绝缘性能，可应用于YGA激光晶的主要配件和集成电路基板中。

　　活性氧化铝是种具有多孔性高分散度的固体物料，有很大的比表面积，既有良好的吸 附性能，又有良好的耐压、耐磨损和耐热性能，因而，被广泛地用作吸附剂、干燥剂 以及各种反应的催化剂载体。

　　产品晶粒结构、分子式、分子量 晶粒结构：X-P型 分子式：AL2O3 分子量：102 2)产品性质： 本品为白色，球状多孔性物质、无臭、不粉化、不溶于水. 技术指标 名称 外观 堆比重g/ml 强度N/粒 比表面m2/g 孔容ml/g 活性% 静态吸附容量PH=60% 吸水% 磨耗率% 指标 白色球状 0.65-0.8 127.4-392 300-340 0.38-0.42 ≥70 .1干燥剂是用在防潮，防霉方面，起干燥作用硅胶是种高活性吸附材料，通常是用硅酸钠和反应，并经老化、酸泡等系列后处理过程而制得。硅胶属非晶态物质，其化学分子式为mSiO2.nH2o。不溶于水和溶剂，无味，化学性质稳定，除强碱、氢氟酸外不与物质发生反应。硅胶的化学组份和物理结构，决定了它具有许多其它同类材料难以取代的特点：吸附性能高、热稳定性好、化学性质稳定、有较高的机械强度等。又称减湿剂。为能吸附或化学吸收水蒸气的固体材料。 用吸附法除去水蒸气的干燥剂有硅胶、氧化铝凝胶、分子筛、活性炭、骨炭、木炭或活性白土等。 用化学吸收法除去水蒸气的常用干燥剂有氯化钙、生石灰或五氧化二磷等与水蒸气的化学亲和力大的物质。 干燥剂是种从大气中吸收潮气的除水剂，它的干燥原理就是通过物理方式将水分子吸附在自身的结构中或通过化学方式吸收水分子并改变其化学结构，变成另外种物质。

　　活性氧化铝具有吸附容量大、比表面积大、强度高、热稳定性好等特点，可广泛应用于化工、石化、天然气和化肥等工业中作吸附剂、干燥剂及催化剂。

Net alumina is white amorphous powder, commonly known as bauxite, with a density of 3.9-4.0g/cm3, a melting point of 2050 ℃ and a boiling point of 2980 ℃. It is insoluble in water. Alumina mainly has two variants of α type and γ type, which can be extracted from bauxite in industry. Bauxite (Al2O3?H2O and Al2O3?3H2O) is the main mineral of aluminum in nature. It is crushed and impregnated with high-temperature sodium hydroxide solution to obtain sodium aluminate solution. Filter to remove the residue, cool the filtrate and add aluminum hydroxide crystal. After long-term stirring, the sodium aluminate solution will decompose and precipitate aluminum hydroxide. The precipitate is separated, washed, and then calcined at 950-1200 ℃ to obtain α-type alumina powder, and the mother liquor can be recycled. This method was invented by Austrian scientist Bayer (K.J.Bayer) in 1888. It is still the main method for industrial production of alumina up to now. It is called "Bayer method". In the lattice of α-type alumina, oxygen ions are closely packed in hexagonal, Al3 + is symmetrically distributed in octahedral coordination centers surrounded by oxygen ions, and the lattice energy is very large, so the melting point and boiling point are very high. α-type alumina is insoluble in water and acid, also known as aluminum oxide in industry, it is the basic raw material for making metal aluminum. It is also used to make various refractory bricks, refractory crucibles, refractory tubes and high temperature resistant experimental instruments. It can also be used as abrasive, flame retardant, filler, etc. High α-alumina is also the raw material for the production of artificial corundum, artificial ruby and sapphire. It is also used to produce the board base of modern large-scale integrated circuits, industry is also called activated alumina, aluminum glue. In its structure, oxygen ions are approximately closely packed in vertical centers, and Al3 + is irregularly distributed in octahedral and tetrahedral voids surrounded by oxygen ions. γ-type alumina is insoluble in water and can be dissolved in strong acid or alkali solution. When it is heated to 1200 ℃, it is completely converted into α-type alumina. γ-type alumina is a porous substance with an internal surface area of several hundred square meters per gram, high activity and strong adsorption capacity. Industrial products are often colorless or micro-pink cylindrical particles with good pressure resistance. It is a commonly used adsorbent, catalyst and catalyst carrier in petroleum refining and petrochemical industry. In industry, it is a deacidification agent for transformer oil and turbine oil, and is also used for chromatography analysis. In the laboratory, it is a neutral strong desiccant with a drying capacity no less than phosphorus pentoxide. After use, it can be regenerated and reused when heated below 175 ℃ for 6-8h. At present, the alumina produced by Bayer process accounts for more than 90% of the total output in the world, most of the alumina is used for making metal aluminum, and less than 10% for other purposes. Product Description: Activated alumina is porous, high dispersion and large specific surface area of alumina with adsorption performance and catalytic activity. Activated alumina ball according to the internal main crystal composition is divided into gamma type and x-p type, according to its use can be divided into activated alumina ball adsorbent, activated alumina ball desiccant and activated alumina ball catalyst carrier. Main uses: activated alumina balls are suitable for drying a variety of gases and liquids, and are used as adsorbents, desiccants, catalysts and carriers in many reaction processes such as petroleum, fertilizers, and chemicals. Various varieties of activated alumina: γ-type catalyst carrier with alumina, its stable catalyst carrier, itself can also be used as a catalyst. X-ρ defluoridation agent: defluoridation treatment of edible water, fluorine absorption capacity: 2.1 mg/g. X-ρ-γ hydrogen peroxide type: used for purification of hydrogen peroxide working fluid. X-ρ net oil agent: used for decolorization and purification of transformer oil.

　　活性氧化铝根据氧化铝的孔径大小大致可分为以下三类：小孔氧化铝、中孔氧化铝和大孔氧化铝。对具体的催化反应，要求氧化铝的孔径大小合适。除孔径大小外，氧化铝的比表面和孔容也是基本的物性参数，大多数要求尽可能大的比表面和孔容，以及孔分布集中的氧化铝。目前，国内外市场拟薄水铝石的价格从不足万元到3万元左右，制备成特种活性氧化铝的价格更高。

　　价格决定市场，市场体现价格

　　目前我国对小孔氧化铝的需求量约5万吨以上。其中仅兰州炼油催化剂厂、山东齐鲁石化和湖南长岭催化剂厂年需求量都在1万吨以上。大孔氧化铝主要用户有抚顺石化催化剂厂、沈阳催化剂厂、温州华华集团、姜堰化工助剂总厂、长岭石油催化剂厂、北京长城、上海石油化工、天津石油化工研究院和其它化肥行业催化剂厂等，总用量也达到3万吨以上。中孔氧化铝主要用户在国外，仅在美国肯塔基州sud-chemie公司每年的用量要超过5000吨，国内目前没有中孔氧化铝生产厂，但也有需求。总之，作为催化剂用的特种活性氧化铝的国内用量应该在10万吨左右。

　　活性氧化铝具有许多毛细孔道，表面积大，可作为吸附剂、干燥剂及催化剂使用。同时还根据吸附物质的性强弱来确定，对水、氧化物、醋酸、碱等具有较强的亲合力，是种微水深度干燥剂，也是吸附性分子的吸附剂。