Priming and body paint having an active anti-corrosive and surface
cleaning effect
    1.
    发明授权
    Priming and body paint having an active anti-corrosive and surface cleaning effect 失效
    起泡和车身涂料具有主动的防腐蚀和表面清洁效果

    公开(公告)号:US4828617A

    公开(公告)日:1989-05-09

    申请号:US1364

    申请日:1987-01-08

    IPC分类号: C09D5/00 C09D5/08

    CPC分类号: C09D5/084

    摘要: The present invention relates to a priming or body paint having active anti-corrosive and surface cleaning effect containing binding material, pigment and optionally solvent, filler and/or additives, characterized in that said pigment, optionally in addition to other known pigments, comprises:(a) 30-70% parts by weight, preferably 40-55% by weight of alumina hydrate (Al/OH/.sub.3),(b) 20-55% by weight of at least of one of atoxic oxides, hydroxides, oxide hydroxides, carbonates or phosphates of amphoteric elements or metals of variable valency possessing less valency than the maximum, in case of aluminum the oxide or hydroxide thereof,(c) 0-50% by weight, preferably 2-15% by weight of calcium and/or magnesium carbonate,and the grain size thereof is

    摘要翻译: 本发明涉及包含粘合材料,颜料和任选的溶剂,填料和/或添加剂的具有活性的防腐蚀和表面清洁效果的底漆或车身涂料,其特征在于所述颜料任选地与其它已知颜料一起包括: (a)30-70重量份,优选40-55重量%的水合氧化铝(Al / OH / 3),(b)20-55重量%的至少一种氧化物,氢氧化物,氧化物 两性元素的氢氧化物,碳酸盐或磷酸盐或具有比最大值低的价态的可变化价金属的化合物,在铝的情况下为氧化物或其氢氧化物,(c)0-50重量%,优选2-15重量%的钙, /或碳酸镁,其粒径<20μm,优选2-10μm。

    Process and apparatus for the mixing of slurries
    4.
    发明授权
    Process and apparatus for the mixing of slurries 失效
    用于混合浆料的方法和设备

    公开(公告)号:US4630931A

    公开(公告)日:1986-12-23

    申请号:US704870

    申请日:1985-02-25

    IPC分类号: B01F13/02

    CPC分类号: B01F13/0244

    摘要: A method of and apparatus for the mixing of a slurry in a tank having a conical bottom along the axis of the tank, and air-lift pipe is provided which is supplied at its lower end with compressed air to induce an upward flow of the slurry and air mixture through the pipe during start up of a mixing operation. Thus an injection is cut off when steady state is reached and air is injected at an upper level in the pipe located in the upper third of the length thereof but below the upper eighth for continuing mixing operation.

    摘要翻译: 提供了一种用于将浆料混合在具有沿罐的轴线的锥形底部的罐中的方法和装置,以及空气提升管,其下端被供应有压缩空气以引起浆料向上流动 并在混合操作启动期间通过管道进行空气混合。 因此,当达到稳定状态并且在位于其长度的三分之一长度但低于上方八分之一处的管中的上部空气处注入空气以进行连续混合操作时,注入被切断。

    Method and apparatus for burning fine-grain material
    5.
    发明授权
    Method and apparatus for burning fine-grain material 失效
    燃烧细粒材料的方法和装置

    公开(公告)号:US4352660A

    公开(公告)日:1982-10-05

    申请号:US226476

    申请日:1981-01-19

    IPC分类号: F27B15/00 C01F7/02

    CPC分类号: F27B15/003

    摘要: The invention relates to a method of burning, calcining or sintering fine-grain material in which the burnt material separated from the gas flow is supplied to a residence container from which a part of the material is returned to the burning zone and the remainder of the material is supplied to the cooling zone. Such a method is distinguished by a low heat and energy requirement and by a simple construction of the apparatus and permits ideal adaptation of the burning conditions to the particular material.

    摘要翻译: 本发明涉及一种燃烧,煅烧或烧结细粒材料的方法,其中从气流分离的燃烧材料被供应到一部分材料返回到燃烧区的停留容器,其余的 材料被供应到冷却区。 这种方法的特征在于低热量和能量需求以及设备的简单结构,并允许将燃烧条件理想地适应于特定材料。

    Process for preparing alumina being suitable for layer chromatography
    7.
    发明授权
    Process for preparing alumina being suitable for layer chromatography 失效
    制备氧化铝适用于层析的方法

    公开(公告)号:US4225639A

    公开(公告)日:1980-09-30

    申请号:US49653

    申请日:1979-06-19

    摘要: The invention relates to a process for preparing alumina being suitable for layer chromatography.The alumina suitable for layer chromatography is prepared in accordance with the invention in such a manner that an aluminium trinydroxyde containing 34 to 37% by weight of bayerite, 3 to 5% by weight of pseudoboehmite and 60 to 62% by weight of amorphous aluminium trihydroxide is heated at 300.degree. C. to 400.degree. C. for 2 to 4 hours.The activated alumina thus produced is snow-white, has a large specific surface and its average grain size is within the range between 8 and 20 .mu.m.The product complies with the requirements of layer chromatographical technique.

    摘要翻译: 本发明涉及一种适用于层析层析的制备氧化铝的方法。 根据本发明制备适用于层析层析的氧化铝,使得含有34至37重量%的三羟铝石,3至5重量%的假勃姆石和60至62重量%的无定形三氢氧化铝的三羟甲基纤维素 在300〜400℃下加热2〜4小时。 这样生成的活性氧化铝为白雪白,比表面积大,平均粒径在8〜20μm的范围内。 该产品符合层析技术的要求。

    Process and apparatus for grain-sizing in alumina hydrate slurry
    8.
    发明授权
    Process and apparatus for grain-sizing in alumina hydrate slurry 失效
    在水合氧化铝浆料中的粒度调整方法和设备

    公开(公告)号:US4816142A

    公开(公告)日:1989-03-28

    申请号:US7122

    申请日:1987-01-27

    摘要: According to the invention, the grains of the hydrate slurry are separated by sedimentation where the dispersed bubbles of air are removed in course of the presizing, then a supplementary sizing is carried out. Preferably, a liquid free from hydrate grains is fed in to stream against the sinking grains. This liquid is advantageously the spent liquor of the hydrate filter. The apparatus according to the invention consists of a container with conical bottom, a feeding device, a slurry outlet stub and an overflow channel. The inlet stubs of the feeding device, however, are placed off-center and every stub is connected with a presizing equipment. This equipment is composed of a bundle of pipes and/or a pack of plates which are slop placed to geometrical axis: At the upper part of the presizing equipment there is a foam overflow apparatus. The bottom of each presizing equipment is connected with a common cone-frustum type deflector casing. The casing is concentric with the container. There is ring shape gap between the upper edge of the deflector casing and the cylinder jacket of the container. Under the deflector casing there is an upwards convex control cone. The control cone is vertically adjustable and concentric with the deflector casing.

    摘要翻译: 根据本发明,通过沉淀分离水合物浆料的颗粒,其中在预定过程中除去分散的空气气泡,然后进行补充施胶。 优选地,将不含水合物颗粒的液体加入到沉没颗粒中。 该液体有利地是水合物过滤器的废液。 根据本发明的装置由具有锥形底部的容器,进料装置,浆料出口短管和溢流通道组成。 然而,进料装置的入口短柱放置在偏心处,每个短截线与预设装置连接。 该设备由一排管道和/或一组板条组成,这些管道几何轴线是倾斜的:在预设设备的上部有一个泡沫溢流装置。 每个预设设备的底部与普通锥形截头锥型偏转器外壳连接。 外壳与容器同心。 在偏转器壳体的上边缘和容器的气缸套之间存在环形间隙。 在偏转器外壳下面有一个向上凸的控制锥。 控制锥体可垂直调节,与导流罩同心。

    Process for the reduction of the sodium hydroxide losses of the
Bayer-type alumina production
    9.
    发明授权
    Process for the reduction of the sodium hydroxide losses of the Bayer-type alumina production 失效
    降低拜耳型氧化铝生产的氢氧化钠损失的方法

    公开(公告)号:US4486393A

    公开(公告)日:1984-12-04

    申请号:US469140

    申请日:1983-02-23

    IPC分类号: C01F7/06

    CPC分类号: C01F7/066

    摘要: The invention relates to a process for the reduction of sodium hydroxide losses of the Bayer-cycle by modified causticization of red mud which comprisessubjecting an optionally previously concentrated red mud slurry led off from the red mud washing line by ramification and containing a liquid phase which has a concentration of 5-40 g. caustic Na.sub.2 0/1. caustification by adjusting the lime content expressed as CaO through addition of lime or lime milk to 1-3.2 moles per mole Al.sub.2 O.sub.3, preferably to 2-2.5 moles per mole Al.sub.2 O.sub.3, related to the total Al.sub.2 O.sub.3 content of the slurry;stirring the slurry for 0.3-5 hours at a temperature of 70.degree.-110.degree. C., preferably at 80.degree.-100.degree. C.;adding to the slurry 3-4 moles, preferably 3.2-3.4 moles, of soda related to 1 mole of the originally dissolved Al.sub.2 O.sub.3, and continuing the stirring for 1-4 hours at 80.degree.-100.degree. C., preferably at a temperature of 90.degree.-95.degree. C.;if necessary causticizing the excess of soda by adding lime or lime milk by methods known per se;if desired concentrating the slurry thus obtained and re-introducing the liquid phase thereof to the red mud washing unit which corresponds to the sodium hydroxide content thereof;and re-entering the slurry to the red mud washing line.The advantages of the process of the present invention are as follows: the sodium hydroxide losses of different origin of Bayer-type alumina production are recovered by a single operation step, the process is simple, requires no expensive equipment and is economical.

    摘要翻译: 本发明涉及通过红泥的改性苛化来降低拜耳 - 循环的氢氧化钠损失的方法,该方法包括将由红泥浆清洗线引出的任选预先浓缩的红泥浆经分散和含有液相 浓度为5-40g。 苛性钠Na20 / 1。 通过将石灰或石灰乳添加为1-3.2摩尔/摩尔Al 2 O 3,优选为2-2.5摩尔/摩尔Al 2 O 3,通过调整CaO表示的石灰含量与浆料的总Al 2 O 3含量相关; 在70-110℃,优选在80℃-100℃下搅拌该浆料0.3-5小时。 向浆料中加入3-4摩尔,优选3.2-3.4摩尔与1摩尔原始溶解的Al 2 O 3有关的苏打,并在80℃-100℃下,优选在 90°-95℃。 如果需要,通过本身已知的方法加入石灰或石灰乳来苛化苏打水; 如果需要浓缩由此获得的浆料并将其液相再引入对应于其氢氧化钠含量的红泥洗涤单元; 并将浆料重新进入红泥清洗线。 本发明方法的优点如下:通过单一操作步骤回收拜耳式氧化铝生产不同来源的氢氧化钠损失,工艺简单,不需要昂贵的设备,而且经济。

    Cleaning boiler tubes of digesting heat exchangers used in alum earth
processing
    10.
    发明授权
    Cleaning boiler tubes of digesting heat exchangers used in alum earth processing 失效
    用于矾土处理的消化热交换器的清洁锅炉管

    公开(公告)号:US4353753A

    公开(公告)日:1982-10-12

    申请号:US212636

    申请日:1980-12-03

    IPC分类号: F28G9/00 B08B3/10

    CPC分类号: F28G9/00

    摘要: The invention relates to plant operations for increasing the cycle times of heat exchangers by the digestion of the aluminium oxide content of a slurry according to the Bayer technology, said slurry consisting of bauxite and sodium aluminate liquor, using an equipment in which the material is heated stepwise and in more parallel material streams, then the material streams are combined and further heated, or combined and kept at the same temperature, or after combination further heated and kept at the same temperature, characterized in that a part of the parallel material streams is slurry, another part of same is aqueous sodium hydroxide solution, preferably sodium aluminate liquor containing sodium hydroxide, or water, and the parallel material streams are exchanged in the heat exchangers in a cyclical manner.

    摘要翻译: 本发明涉及通过根据拜耳技术消除浆料的氧化铝含量来增加热交换器的循环时间的设备操作,所述浆料由铝土矿和铝酸钠液体组成,使用其中材料被加热的设备 然后在更平行的材料流中,将物料流组合并进一步加热或组合并保持在相同的温度,或者在进一步加热并保持在相同温度下的组合之后,其特征在于,一部分平行材料流是 浆料的另一部分是氢氧化钠水溶液,优选含有氢氧化钠的铝酸钠溶液或水,并且平行材料流以循环方式在热交换器中交换。