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    • 2. 发明授权
    • Method for preparing hydrous iron oxide gels and spherules
    • 水合氧化铁凝胶和球晶的制备方法
    • US06599493B2
    • 2003-07-29
    • US09917117
    • 2001-07-27
    • Jack L. CollinsRobert J. LaufKimberly K. Anderson
    • Jack L. CollinsRobert J. LaufKimberly K. Anderson
    • C01G4900
    • C01G49/02C01G49/0036C01P2004/32C01P2004/62
    • The present invention is directed to methods for preparing hydrous iron oxide spherules, hydrous iron oxide gels such as gel slabs, films, capillary and electrophoresis gels, iron monohydrogen phosphate spherules, hydrous iron oxide spherules having suspendable particles homogeneously embedded within to form composite sorbents and catalysts, iron monohydrogen phosphate spherules having suspendable particles of at least one different sorbent homogeneously embedded within to form a composite sorbent, iron oxide spherules having suspendable particles homogeneously embedded within to form a composite of hydrous iron oxide fiber materials, iron oxide fiber materials, hydrous iron oxide fiber materials having suspendable particles homogeneously embedded within to form a composite, iron oxide fiber materials having suspendable particles homogeneously embedded within to form a composite, dielectric spherules of barium, strontium, and lead ferrites and mixtures thereof, and composite catalytic spherules of barium or strontium ferrite embedded with oxides of Mg, Zn, Pb, Ce and mixtures thereof. These variations of hydrous iron oxide spherules and gel forms prepared by the gel-sphere, internal gelation process offer more useful forms of inorganic ion exchangers, catalysts, getters, dielectrics, and ceramics.
    • 本发明涉及制备含水氧化铁球,含水氧化铁凝胶如凝胶板,薄膜,毛细管和电泳凝胶,单磷酸铁球,含有均匀嵌入其中的悬浮颗粒的含水氧化铁球,形成复合吸附剂的方法, 催化剂,具有均匀嵌入以形成复合吸附剂的至少一种不同吸附剂的悬浮颗粒的磷酸一氢化铁小球,具有均匀嵌入其中的可悬浮颗粒的氧化铁球,形成水合氧化铁纤维材料,氧化铁纤维材料,含水 具有均匀地嵌入其中以形成复合材料的悬浮颗粒的氧化铁纤维材料,具有均匀地嵌入其中的可悬浮颗粒的氧化铁纤维材料,以形成钡,锶和铅铁氧体的介电球,及其混合物,以及复合催化剂 包含Mg,Zn,Pb,Ce的氧化物的钡或锶铁氧体的球体及其混合物。 通过凝胶球,内部凝胶化方法制备的含水氧化铁球和凝胶形式的这些变化提供了更有用的无机离子交换剂,催化剂,吸气剂,电介质和陶瓷的形式。
    • 3. 发明授权
    • Process for treating red mud to recover metal values therefrom
    • 处理红泥以回收金属价值的方法
    • US06248302B1
    • 2001-06-19
    • US09497909
    • 2000-02-04
    • Robert J. BarnettMichael B. Mezner
    • Robert J. BarnettMichael B. Mezner
    • C01G4900
    • C01G23/00C01G23/04C01G49/00C01G49/02C22B3/44C22B7/007C22B34/12Y02P10/234
    • A method for processing red mud to recover iron, aluminum, silicon and titanium metal values therefrom the method comprising the steps of adding the red mud to a digester containing an acid to provide a mixture of acid and red mud and heating the mixture to dissolve soluble compounds of at least one of iron, aluminum, silicon and titanium to provide a digest containing dissolved salts of the soluble compounds and to provide a gas component. Thereafter, the digest is treated with water to dissolve water soluble salts therein to provide a slurry comprised of a liquid containing water and the dissolved soluble salts and a solid component comprised of silica. The solid component is separated from the liquid and the pH of the liquid is adjusted to form an aluminate and an iron-containing precipitate. The iron-containing precipitate is separated from the liquid to provide an iron-depleted liquid whose pH is adjusted to precipitate aluminum trihydrate which is separated from the iron-depleted liquid to provide an aluminum trihydrate-depleted liquid. The pH of the aluminum trihydrate-depleted liquid is adjusted to form a precipitate comprised of at least one remaining salt in the aluminum trihydrate-depleted liquid to provide a salt-depleted liquid. The salt precipitate is separated from the salt-depleted liquid thereby recovering the metal values from the red mud.
    • 一种处理赤泥以回收铁,铝,硅和钛金属值的方法,包括以下步骤:将红泥添加到含酸的蒸煮器中,以提供酸和红泥的混合物,并加热混合物以溶解可溶的 铁,铝,硅和钛中的至少一种的化合物,以提供含有可溶性化合物的溶解盐的消化物并提供气体组分。 此后,用水处理消化物以溶解其中的水溶性盐,以提供由含有水的溶液和溶解的可溶性盐以及由二氧化硅组成的固体组分的淤浆。 将固体组分与液体分离,并调节液体的pH以形成铝酸盐和含铁沉淀物。 将含铁沉淀物与液体分离以提供贫铁液体,其pH被调节以沉淀三水合铝,其与贫铁液体分离以提供三水合铝贫液体。 调节三水合铝酸液体的pH以在三水合铝贫液体中形成由至少一种剩余的盐组成的沉淀物以提供贫盐液体。 将盐沉淀物与贫盐液体分离,从而从红泥中回收金属值。
    • 6. 发明授权
    • Method for making ferrite magnets
    • 制造铁氧体磁铁的方法
    • US06755988B1
    • 2004-06-29
    • US10130290
    • 2002-07-10
    • Philippe TenaudEric Brando
    • Philippe TenaudEric Brando
    • C01G4900
    • H01F41/0273C04B35/2633
    • A method for making ferrite magnets of formula M1−xRxFe12−yTyO19 including: a1) forming a powder mixture MP of related raw materials, a2) transforming into granules in green state A, b) calcining the granules in green state to form clinker B, c) wet grinding clinker B to obtain a homogeneous dispersion of fine particles C, d) concentrating and compressing the particles under an orienting magnetic field to form an anisotropic green compact D, and e) sintering the green compact to obtain a sintered element E. In step a1), MP is formed from a dry mixture MS of M and Fe powder elements and a dispersion DF of raw materials related to elements R and T, and in step b) the granules in green state are calcined to obtain a clinker B which is homogeneous in chemical composition and size and with apparent low density, between 2.5 and 3.5.
    • 一种制备式M1-xRxFe12-yTyO19的铁氧体磁体的方法,包括:a1)形成相关原料的粉末混合物MP,a2)转化成绿色状态A的颗粒,b)以生坯状态煅烧颗粒以形成熟料B, c)湿式研磨熟料B,得到细颗粒C的均匀分散体,d)在定向磁场下浓缩和压缩颗粒,形成各向异性生坯D,e)烧结生坯以获得烧结元件E. 在步骤a1)中,MP由M和Fe粉末元素的干燥混合物MS和与元素R和T相关的原料的分散体DF形成,并且在步骤b)中,将生坯中的颗粒煅烧以获得熟料B 其化学成分和尺寸均匀,表观密度低,为2.5〜3.5。
    • 8. 发明授权
    • Process for producing magnetite particles
    • 生产磁铁矿颗粒的方法
    • US06767529B2
    • 2004-07-27
    • US10047315
    • 2002-01-14
    • Ulrich Meisen
    • Ulrich Meisen
    • C01G4900
    • H01F1/36C01G49/08C01P2004/30C01P2004/41C01P2004/62C01P2006/42C09C1/24
    • This invention relates to a process for producing magnetite particles having a coercivity of 6.366 kA/m to 10.345 kA/m (=80 to 130 Oe) and an octahedral particle shape, comprising heating an alkaline component and an iron(II) component in the form of an aqueous solution to a temperature of 50° C. to 100° C., whereby the molar ratio of iron(II) component to one equivalent of alkaline component is 0.38 to 0.45, and treating the suspension with an oxidizing agent at a rate of oxidation of 20 to 50 mol. % Fe(II)/h until the iron compound has an Fe(III) content of more than 65 mol. %, and then again adding an Fe(II) component in the form of an aqueous solution at a molar ratio of Fe(II) to one equivalent of total alkaline component used is 0.47 to 0.49, and treating the suspension with an oxidizing agent, at a rate of oxidation is 20 to 50 mol. % Fe(II)/h until the iron compound has an Fe(III) content of more than 65 mol. %, and filtering the suspension, and washing, drying and grounding the residue.
    • 本发明涉及矫顽磁力为6.366kA / m至10.345kA / m(= 80-130Oe)和八面体颗粒形状的磁铁矿颗粒的制造方法,包括加热碱性组分和铁(II)组分 形式的水溶液至50℃至100℃,由此铁(II)组分与一当量碱性组分的摩尔比为0.38至0.45,并用氧化剂处理悬浮液 氧化速率为20〜50 mol。 %Fe(II)/ h,直到铁化合物的Fe(III)含量大于65mol。 %,然后以Fe(II)摩尔比与所使用的全部碱性成分的1当量再次加入水溶液形式的Fe(II)成分为0.47〜0.49,用氧化剂处理悬浮液, 氧化速率为20〜50摩尔。 %Fe(II)/ h,直到铁化合物的Fe(III)含量大于65mol。 %,过滤悬浮液,洗涤,干燥和接地残渣。