公开(公告)号：US4854981A

公开(公告)日：1989-08-08

申请号：US44096

申请日：1987-04-30

申请人： Forrest R. Goodson ,  Mark E. Dudley ,  Thomas P. Rudy

发明人： Forrest R. Goodson ,  Mark E. Dudley ,  Thomas P. Rudy

IPC分类号： B01J23/745 ,  B01J35/02 ,  C01G49/06 ,  C06B23/00 ,  F23D14/18

CPC分类号： B01J35/023 ,  B01J23/745 ,  C06B23/007 ,  Y10S149/11

摘要： A highly active, finely divided ferric oxide burning rate catalyst and method for making the same. The catalyst is made by vaporizing an iron-containing compound that is capable of vaporization at a temperature below about 500.degree. C., and is capable of forming ferric oxide when reacted with an oxygen-containing atmosphere at temperatures below about 500.degree. C. The iron-containing compound is then oxidized in an oxygen-containing atmosphere. The ferric oxide burning rate catalyst made by this process is particularly adapted for use in a composite solid rocket propellant. This process provides an ultra pure, highly active, finely divided burning rate catalyst.

公开(公告)号：US4806335A

公开(公告)日：1989-02-21

申请号：US119635

申请日：1987-11-12

申请人： Masayoshi Saito ,  Jiro I

发明人： Masayoshi Saito ,  Jiro I

IPC分类号： C01G49/02 ,  C01G49/06 ,  G11B5/706 ,  C01G45/02

CPC分类号： B82Y30/00 ,  C01G49/06 ,  G11B5/70663 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64

摘要： A process for producing acicular .alpha.-FeOOH particle powder having a narrow particle size distribution and a rectified shape and being highly dispersed is provided, which process comprises mixing with stirring an aqueous solution of a Fe(II) salt with an aqueous solution of an alkali in an equivalent ratio of alkali to Fe(II) salt of 1.5 or more, oxidizing the mixture with a O.sub.2 -containing gas, heat treating the resulting suspension of iron .alpha.-FeOOH particle powder to 60.degree. to 100.degree. C., further adding an aqueous solution of a FE(II) salt in a proportion of atom to molecule of Fe(II)/.alpha.-FeOOH of 0.5 to 10% and again oxidizing the mixture with a O.sub.2 -containing gas at 35.degree. to 55.degree. C.

摘要翻译： 提供了具有窄的粒度分布和矫正形状并且高度分散的针状α-FeO​​OH颗粒粉末的方法，该方法包括将Fe（II）盐的水溶液与碱的水溶液 碱金属与Fe（II）盐的当量比为1.5以上，用含O2气体氧化该混合物，将得到的铁α-FeO​​OH颗粒粉末悬浮液热处理至60℃至100℃，进一步加入 Fe（II）/α-FeO​​OH的原子与分子的比例为0.5至10％的FE（II）盐的水溶液，并再次在含有含氧气体的温度下在35至55℃下氧化该混合物。

公开(公告)号：US4751070A

公开(公告)日：1988-06-14

申请号：US852470

申请日：1986-04-15

申请人： Vencatesh R. Pai Verneker

发明人： Vencatesh R. Pai Verneker

IPC分类号： C01F5/06 ,  B01J19/00 ,  B22F9/22 ,  C01B13/18 ,  C01B21/16 ,  C01B35/04 ,  C01F7/02 ,  C01F7/30 ,  C01G1/02 ,  C01G23/00 ,  C01G25/00 ,  C01G25/02 ,  C01G49/00 ,  C01G49/06 ,  C01G53/00 ,  C22B5/00 ,  C22B34/12 ,  G11B5/706 ,  H01F1/36 ,  C01G49/02

CPC分类号： C22B5/00 ,  C01F7/02 ,  C01G25/02 ,  C01G49/009 ,  C01G49/06 ,  C22B34/129 ,  G11B5/70652 ,  H01F1/36 ,  C01P2006/42

摘要： Ultrafine particles of ceramic or metallic material are obtained at low temperatures from a nitrate source capable of endothermic decomposition by molecularly combining under a nitrogen atmosphere the nitrate source with an inorganic reducing fuel compound, such as hydrazine, to provide a chemical precursor for the ceramic or metallic material and then exothermically decomposing the precursor in a controlled atmosphere by heating to a temperature up to about 200.degree. C. below the endothermic decomposition temperature of the nitrate source. The nitrate source is a metal nitrate or a mixture of nitrate salts. Ferrite particles are recovered when the nitrate source is a mixture of nitrate salts containing ferric nitrate in a 2:1 molar ratio with at least one additional metal nitrate.

摘要翻译： 陶瓷或金属材料的超细颗粒在低温下可从能够吸热分解的硝酸盐获得，其在氮气氛下通过在硝酸盐源与无机还原性燃料化合物如肼之间进行分子结合，以提供陶瓷的化学前体 然后通过加热到硝酸盐源的吸热分解温度以下约200℃的温度，在受控气氛中放热分解前体。 硝酸盐源是金属硝酸盐或硝酸盐的混合物。 当硝酸盐源是含有2:1摩尔比的硝酸铁与至少一种另外的金属硝酸盐的硝酸盐的混合物时，回收铁氧体颗粒。

公开(公告)号：US4693931A

公开(公告)日：1987-09-15

申请号：US641733

申请日：1984-08-17

申请人： Haruo Andoh ,  Seiji Matsumoto

发明人： Haruo Andoh ,  Seiji Matsumoto

IPC分类号： C01G49/06 ,  C09D5/23 ,  C09D101/08 ,  C09D127/04 ,  C09D127/06 ,  G11B5/706 ,  G11B5/712 ,  G11B5/714 ,  G11B5/84 ,  G11B5/842 ,  H01F1/11 ,  B32B5/16

CPC分类号： G11B5/714 ,  G11B5/70652 ,  G11B5/712 ,  Y10S428/90 ,  Y10T428/256

摘要： A magnetic recording medium comprising a nonmagnetic support and a magnetic layer provided thereon is disclosed. The magnetic layer comprises a magnetic recording element and a binder, wherein the magnetic recording element mainly comprises acicular gamma-Fe.sub.2 O.sub.3 particles having an average porosity of not more than 5% by volume, a specific surface area of 24 to 30 m.sup.2 /g and the X-ray diffraction intensity at the face (210) to that at the face (311) of not more than 5%. The magnetic recording medium has improved electromagnetic conversion characteristics such as sensitivity and noise.

摘要翻译： 公开了一种包括非磁性载体和设置在其上的磁性层的磁记录介质。 磁性层包括磁记录元件和粘合剂，其中磁记录元件主要包括平均孔隙率不大于5体积％，比表面积为24-30m2 / g的针状γ-Fe2O3颗粒和 面部（210）与面部（311）处的X射线衍射强度不大于5％。 磁记录介质具有改善的电磁转换特性，例如灵敏度和噪声。

公开(公告)号：US4663145A

公开(公告)日：1987-05-05

申请号：US774420

申请日：1985-09-10

申请人： Peter J. T. Van den Berk ,  Berend Knol ,  Franciscus J. M. Dubois

发明人： Peter J. T. Van den Berk ,  Berend Knol ,  Franciscus J. M. Dubois

IPC分类号： B01J8/12 ,  C01F7/30 ,  C01G49/06 ,  C01G53/00 ,  C23F1/46 ,  C23G1/36 ,  C01B7/18 ,  B01J8/08 ,  C01B17/90 ,  F27B15/00

CPC分类号： C23G1/36 ,  B01J8/12 ,  C01F7/30 ,  C01G49/06 ,  C01G53/00 ,  C01G53/04 ,  Y10S159/29 ,  Y10S423/01 ,  Y10S423/02

摘要： A device for and method of working up etching and pickling liquids consisting of a vertical furnace having one or more vertical reaction spaces through which balls move at a maximum packing density.The furnace has a temperature gradient from the bottom (high) to the top (low). The reaction space and the balls consist of a material which is inert with respect to the liquid to be worked up. The liquid is introduced into the upper side of the furnace so that a film is formed in the heated surface of the balls. The salt dissolved in the liquid decomposes pyrolytically. The metal oxide is deposited on the surface of the balls and is removed therefrom after leaving the reaction space. The acid residue vapours are drained at the top and recovered in a separate absorber to the original pickling or etching acid.

摘要翻译： 一种处理由具有一个或多个垂直反应空间的垂直炉组成的蚀刻和酸洗液体的装置和方法，球以最大填充密度移动。 炉具有从底部（高）到顶部（低）的温度梯度。 反应空间和球由相对于被处理液体是惰性的材料组成。 将液体引入炉的上侧，使得在滚珠的加热表面中形成膜。 溶解在液体中的盐分解热分解。 金属氧化物沉积在球的表面上，并在离开反应空间之后被除去。 酸残留蒸气在顶部排出并在单独的吸收器中回收到原酸洗或酸蚀酸。

公开(公告)号：US4612138A

公开(公告)日：1986-09-16

申请号：US520390

申请日：1983-08-04

申请人： Bruce A. Keiser

发明人： Bruce A. Keiser

IPC分类号： B01J13/00 ,  C01B13/32 ,  C01F7/02 ,  C01F7/34 ,  C01G19/02 ,  C01G23/053 ,  C01G25/02 ,  C01G39/02 ,  C01G49/06 ,  C04B35/26

CPC分类号： C01F7/34 ,  B01J13/0013 ,  C01B13/32 ,  C01F7/02 ,  C01G19/02 ,  C01G23/053 ,  C01G25/02 ,  C01G39/02 ,  C01G49/06 ,  C01P2006/40 ,  C01P2006/60 ,  C01P2006/80

摘要： A stable acidic and alkaline metal oxide sol is formed by hydrolyzing a metal salt precursor in the presence of a stabilizing component chosen from the group consisting of surfactants having an HLB of at least 8, dispersing carboxylate polymers, and mixtures thereof, then alkalizing by adding a water-soluble amine compound, preferably diethylaminoethanol.

摘要翻译： 一种稳定的酸性和碱性金属氧化物溶胶是通过在选自HLB至少为8的表面活性剂，分散羧酸盐聚合物及其混合物的稳定组分存在下水解金属盐前体形成的，然后通过加入碱化 水溶性胺化合物，优选二乙基氨基乙醇。

公开(公告)号：US4560544A

公开(公告)日：1985-12-24

申请号：US680241

申请日：1984-12-10

申请人： Kazuo Nakata ,  Tsuneo Ishikawa ,  Taro Amamoto ,  Toshihiko Kawamura

发明人： Kazuo Nakata ,  Tsuneo Ishikawa ,  Taro Amamoto ,  Toshihiko Kawamura

IPC分类号： C01G49/02 ,  C01G49/06 ,  G11B5/706 ,  H01F1/11

CPC分类号： C01G49/06 ,  G11B5/70663 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2006/12 ,  C01P2006/42

摘要： A process for preparing acicular .alpha.-FeOOH by partially neutralizing and then oxidizing a ferrous salt solution in the presence of phosphoric acid or a salt thereof to form seed crystals of .alpha.-FeOOH and optionally further oxidizing said solution while neutralizing said solution with an alkali to grow said seed crystals, wherein pyrophosphoric acid or a salt thereof is used as said phosphoric acid and the seed crystals of .alpha.-FeOOH are formed at a temperature of 50.degree. to 100.degree. C. The .alpha.-FeOOH obtained according to the process of this invention is composed of fine particles and appreciably improved in acicularity and particle size distribution. Also, a magnetic recording medium made from the magnetic iron oxides derived therefrom in a usual way have a low noise characteristic and, are excellent in coercivity and other magnetic properties.

摘要翻译： 一种制备针状α-FeO​​OH的方法，通过在磷酸或其盐存在下部分中和亚铁盐溶液氧化形成α-FeO​​OH晶种，并任选地进一步氧化所述溶液，同时用碱中和所述溶液 生长所述晶种，其中焦磷酸或其盐用作所述磷酸，并且在50℃至100℃的温度下形成α-FeO​​OH的晶种。根据该方法获得的α-FeO​​OH 本发明由微细颗粒组成，针状度和粒度分布明显改善。 另外，以通常的方式由其衍生的磁性铁氧化物制成的磁记录介质具有低噪声特性，矫顽磁力和其它磁性能优异。

公开(公告)号：US4551327A

公开(公告)日：1985-11-05

申请号：US513033

申请日：1983-07-12

申请人： Ichiro Honma ,  Arata Koyama ,  Masatoshi Amano ,  Nobusuke Takumi

发明人： Ichiro Honma ,  Arata Koyama ,  Masatoshi Amano ,  Nobusuke Takumi

IPC分类号： C01G51/00 ,  C01G49/00 ,  C01G49/06 ,  G11B5/706 ,  H01F1/10 ,  H01F1/11

CPC分类号： G11B5/70673 ,  G11B5/70684

摘要： An aqueous slurry of a magnetic iron oxide powder is mixed with a suspension prepared by neutralizing an aqueous ferrous salt solution with an alkali to form ferrous hydroxide and then adding an aqueous cobalt salt solution thereto, and the excess OH concentration of the mixed slurry is adjusted to 0.05 to 3 mol/l, thereby obtaining a cobalt-and ferrous iron-containing ferromagnetic iron oxide. The cobalt-and ferrous iron-containing ferromagnetic iron oxide is excellent in coercivity, distribution of coercivity and other magnetic properties, and the magnetic tape produced by using such iron oxide is also excellent in coercivity and switching field distribution.

摘要翻译： 将磁性氧化铁粉末的水性浆料与通过用碱中和亚铁盐水溶液制备的悬浮液混合形成氢氧化亚铁，然后向其中加入钴盐水溶液，并调节混合浆料的过量OH浓度 至0.05至3mol / l，从而获得含铁和含铁铁的铁磁性氧化铁。 含钴铁和含铁铁的铁磁性氧化铁的矫顽力，矫顽力分布等磁性能优异，通过使用这种氧化铁制造的磁带也具有优异的矫顽力和切换场分布。

公开(公告)号：US4540551A

公开(公告)日：1985-09-10

申请号：US707196

申请日：1985-03-01

申请人： James P. Bonsack ,  Semyon D. Fridman

发明人： James P. Bonsack ,  Semyon D. Fridman

IPC分类号： C01G49/06 ,  C01G49/10 ,  C22B34/12 ,  C01G23/02

CPC分类号： C01G49/10 ,  C01G49/06 ,  C22B34/1222 ,  Y02P10/23

摘要： There is provided a multi stage process for nonselectively chlorinating a titaniferous ore containing iron to produce TiCl.sub.4. In this process a portion of the ore charge is subjected to conventional fluid bed chlorination to produce TiCl.sub.4 and FeCl.sub.2. A second portion is subdivided and submitted to chlorination in a dilute phase chlorination step using FeCl.sub.3 as the chlorinating agent to produce additional TiCl.sub.4. The FeCl.sub.3 is obtained by partial oxidation of the FeCl.sub.2 obtained in the first stage and/or second stage to yield Fe.sub.2 O.sub.3 and FeCl.sub.3. The product streams of TiCl.sub.4 are then combined for further treatment.

摘要翻译： 提供了一种用于非选择性氯化含铁含铁矿石以生产TiCl 4的多阶段方法。 在该过程中，矿石装料的一部分经受常规流化床氯化以产生TiCl 4和FeCl 2。 将第二部分细分并在稀氯化步骤中进行氯化，使用FeCl 3作为氯化剂以产生另外的TiCl 4。 通过在第一阶段和/或第二阶段中获得的FeCl 2的部分氧化获得FeCl 3，以产生Fe 2 O 3和FeCl 3。 然后将TiCl 4的产物流合并用于进一步处理。

公开(公告)号：US4497723A

公开(公告)日：1985-02-05

申请号：US508168

申请日：1983-06-27

申请人： Manfred Ohlinger ,  Guenter Vaeth ,  Peter Rudolf ,  Wilhelm Sarnecki ,  Helmut Jakusch ,  Eberhard Koester ,  Milena Melzer

发明人： Manfred Ohlinger ,  Guenter Vaeth ,  Peter Rudolf ,  Wilhelm Sarnecki ,  Helmut Jakusch ,  Eberhard Koester ,  Milena Melzer

IPC分类号： C01G49/02 ,  C01G49/06 ,  G11B5/706 ,  H01F1/11 ,  C01G49/08

CPC分类号： B82Y30/00 ,  C01G49/06 ,  G11B5/70694 ,  C01P2002/60 ,  C01P2004/10 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/42

摘要： A process for the preparation of acicular ferrimagnetic iron oxides by reducing gamma-iron(III) oxide hydroxide to magnetite, at from 280.degree. to 620.degree. C., by means of an organic compound which is decomposable at this temperature in the presence of iron oxide, and, optionally, a stream of reducing gas, and, if desired, then oxidizing the magnetite with oxygen-containing gases, at from 150.degree. to 450.degree. C., to acicular ferrimagnetic iron oxide of the formula FeO.sub.x, where x is from above 1.33 to 1.50, wherein the organic compound used for the reduction is a non-polar glycerol ester of a fatty acid which is introduced into the aqueous reaction suspension during the preparation of the gamma-iron(III) oxide hydroxide.

摘要翻译： 一种制备针状亚铁磁性氧化铁的方法，该方法是通过在这种温度下在铁存在下可分解的有机化合物将280℃至620℃的氧化氢氧化物还原成磁铁矿 氧化物和任选的还原气体流，并且如果需要，然后用含氧气体在150℃至450℃下将磁铁矿氧化成式FeO x的针状亚铁磁性氧化铁，其中x为 从1.33到1.50，其中用于还原的有机化合物是在制备γ-铁（III）氧化物氢氧化物期间引入到水性反应悬浮液中的非极性甘油酯脂肪酸酯。