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    Aluminum nitride powder and a process for the preparation thereof
    31.
    发明授权
    Aluminum nitride powder and a process for the preparation thereof 失效
    氮化铝粉末及其制备方法

    公开(公告)号：US4923691A

    公开(公告)日：1990-05-08

    申请号：US364013

    申请日：1989-06-09

    申请人： Dieter Peters ,  Gero Heymer ,  Christian May

    发明人： Dieter Peters ,  Gero Heymer ,  Christian May

    IPC分类号： C01B21/072

    CPC分类号： C01B21/072 ,  C01P2002/60 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/60

    摘要： An aluminum nitride powder has a crystallite size of 40 to 150 nm, measured by powder diffractometry and evaluated by the method of Scherrer, a primary particle size of 0.1 to 0.5 .mu.m, a specific surface according to BET of 5 to 50 m.sup.2 /g and a degree of whiteness of more than 91%, measured using light of a 400 to 700 nm wavelength against barium sulfate analytical reagent as standard of whitness.To prepare this aluminum nitride powder, metallic aluminum and monoamminealuminum chloride [AlCl.sub.3 (NH.sub.3)] are first molten together in an inert gas atmosphere at temperatures above 125.degree. C. and allowed to react with one another with evolution of hydrogen. 8 to 20 g of ammonia are then introduced per hour per mol of monoamminealuminum chloride into the aluminum-containing monoamminealuminum chloride melt at temperatures between 250.degree. and 400.degree. C., aluminum nitride being precipitated as a solid until the conversion of the aluminum is complete. The temperature of the melt is finally raised to more than 400.degree. C.

    摘要翻译： 氮化铝粉末的微晶尺寸为40〜150nm，用粉末衍射法测定，用Scherrer法评价，一次粒径为0.1〜0.5μm，BET比表面积为5〜50m 2 / g 白度为91％以上，采用400〜700nm波长的光作为白度标准测定硫酸钡分析试剂。 为了制备这种氮化铝粉末，首先在惰性气体气氛中，在高于125℃的温度下将金属铝和一氯化铝[AlCl 3（NH 3）]熔融在一起，并使其彼此发生氢气反应。 然后在250-400℃的温度下将8至20g的氨每小时每摩尔氯化单铝酸铵引入含铝单胺氯化铝熔体中，将氮化铝作为固体沉淀直到铝的转化完全 。 熔体的温度最终升至400℃以上。

    Continuous process for complete removal or organic impurities from and complete decolorization of prepurified wet-process phosphoric acid
    32.
    发明授权
    Continuous process for complete removal or organic impurities from and complete decolorization of prepurified wet-process phosphoric acid 失效
    用于完全去除或有机杂质的连续方法和完全脱湿的湿法磷酸完全脱色

    公开(公告)号：US4906445A

    公开(公告)日：1990-03-06

    申请号：US311640

    申请日：1989-02-16

    申请人： Gunther Schimmel ,  Gerhard Bettermann ,  Gero Heymer ,  Friedrich Kolkmann

    发明人： Gunther Schimmel ,  Gerhard Bettermann ,  Gero Heymer ,  Friedrich Kolkmann

    IPC分类号： C01B25/234 ,  C01B25/235 ,  C01B25/46

    CPC分类号： C01B25/461 ,  C01B25/235

    摘要： A continuous process is indicated for complete removal of organic impurities from and complete decolorization of pre-purified wet-process phosphoric acid which has been purified by an extractive method using an organic solvent, freed from residual hydrofluoric acid by steam stripping and treated with hydrogen peroxide at elevated temperature, which comprises mixing the pre-purified wet-process phosphoric acid and the hydrogen peroxide in a mixing zone at a temperature of from 100.degree. to 200.degree. C., preferably 140.degree. to 160.degree. C., and allowing them to react at this temperature for a further 1 to 4 hours, cooling to from 85.degree. to 90.degree. C. the pre-purified wet-process phosphoric acid treated in this way and pumping it at this temperature with exclusion of air firstly through an activated charcoal bed which has been prepared on the basis of peat and has been steam-activated and has a BET surface area of from 800 to 1000 m.sup.2 /g, and subsequently through a silicon carbide and/or graphite bed while maintaining a pumping rate of less than 0.5 m.sup.3 /h of wet-process phosphoric acid per m.sup.3 of activated charcoal bed.

    摘要翻译： 指示完全除去有机杂质并完全脱色预纯化的湿法磷酸的连续方法，其通过萃取方法使用有机溶剂纯化，通过汽提除去残留的氢氟酸并用过氧化氢处理 在高温下，其包括在预先纯化的湿法磷酸和过氧化氢的混合区中在100至200℃，优选140至160℃的温度下混合，并使它们 在该温度下再反应1至4小时，冷却至85℃至90℃，预纯化的湿法磷酸以此方式处理并在该温度下泵送，首先通过活性炭排除空气 基于泥炭制备并已蒸汽活化并具有800至1000m2 / g的BET表面积的床，随后通过碳化硅和/或石墨b 同时保持每立方米活性炭床的湿法磷酸的泵送速率小于0.5m 3 / h。

    Process for the dearsenification of polyphosphoric acid
    36.
    发明授权
    Process for the dearsenification of polyphosphoric acid 失效
    多磷酸脱砷方法

    公开(公告)号：US4399114A

    公开(公告)日：1983-08-16

    申请号：US402941

    申请日：1982-07-29

    申请人： Alexander Maurer ,  Gero Heymer ,  Markus Erpenbach

    发明人： Alexander Maurer ,  Gero Heymer ,  Markus Erpenbach

    IPC分类号： C01B25/24 ,  C01B25/16

    CPC分类号： C01B25/24

    摘要： The disclosure relates to a process for the continuous dearsenification of polyphosphoric acid with the aid of hydrogen sulfide in a gas admission zone. To this end, the disclosure provides for the acid to be dearsenified in a gas admission zone subdivided so as to comprise at least two separate liquid matter-receiving zones, each zone being separated from the other by means of a separate gas zone; for the liquid in each of the liquid matter-receiving zones to be maintained at a level 0.1 up to 10 cm high, without admission of gas; for hydrogen sulfide which remained unreacted in the individual liquid matter-receiving zones to be collected in the respective gas zone and for it to be finely redispersed in the liquid matter-receiving zone directly upstream of the respective gas zone by allowing the hydrogen sulfide to flow through a plurality of openings into the acid, the latter being delivered from the respective liquid-matter-receiving zone into the next downstream liquid-matter-receiving zone, and introduced thereinto directly below the liquid matter level therein; for precipitated arsenic sulfide to be separated from the acid coming from the lower end of the gas admission zone, and for the filtrate obtained to be freed from gaseous hydrogen sulfide in excess.

    摘要翻译： 本公开涉及在气体入口区借助硫化氢连续脱砷多磷酸的方法。 为此，本公开内容提供了在气体进入区域中进行脱砷的酸，其被细分为包括至少两个分离的液体物质接收区域，每个区域通过单独的气体区域与另一个区域分离; 使每个液体物质接收区域中的液体保持在0.1至10厘米高的水平，而不允许气体; 对于在各个液体物质接收区中保持未反应的硫化氢，其被收集在各个气体区中，并且通过允许硫化氢流动直接在各个气体区的上游被精细地再分散在液体物质接收区中 通过多个开口进入酸，后者从相应的液体接收区输送到下一个下游液体接收区，并直接在其中引入液体物质的下方; 使沉淀的硫化砷与气体入口区的下端的酸分离，得到的过滤得到的无水硫化氢的滤液。

    Production of granular alkali metal diphosphates or triphosphates
    37.
    发明授权
    Production of granular alkali metal diphosphates or triphosphates 失效
    生产颗粒状碱金属二磷酸盐或三磷酸盐

    公开(公告)号：US4394358A

    公开(公告)日：1983-07-19

    申请号：US303100

    申请日：1981-09-17

    申请人： Alexander Maurer ,  Renate Adrian ,  Herbert Panter ,  Gero Heymer ,  Dieter Nolker

    发明人： Alexander Maurer ,  Renate Adrian ,  Herbert Panter ,  Gero Heymer ,  Dieter Nolker

    IPC分类号： C01B25/41 ,  C01B25/42 ,  C11D3/06 ,  C01B25/30

    CPC分类号： C01B25/418 ,  C01B25/425 ,  C11D3/062

    摘要： The invention relates to a process for making granulated, partially or completely hydrated alkali metal diphosphates or triphosphates. To this end, the invention provides for alkali metal diphosphates or triphosphates which consist to an extent of at least 20% of particles with a size of less than 0.045 mm and are hydrated to an extent of less than 90%, based on the phosphates' theoretical content of water of hydration, to be intensively mixed and granulated in the presence of water and an ammonium polyphosphate, this latter being used in a proportion of about 0.5 to 50 weight %, based on the quantity of water used.

    摘要翻译： 本发明涉及制备颗粒状，部分或完全水合的碱金属二磷酸盐或三磷酸盐的方法。 为此，本发明提供碱金属二磷酸盐或三磷酸盐，其碱度至少为20％，其尺寸小于0.045mm，并且基于磷酸盐的水合物水合至小于90％的程度， 在水和多磷酸铵的存在下，水合的水的理论含量将被浓缩混合和造粒，后者基于所用的水量以约0.5至50重量％的比例使用。

    Process for making aqueous alkali metal phosphate solutions
    38.
    发明授权
    Process for making aqueous alkali metal phosphate solutions 失效
    制备碱金属磷酸盐水溶液的方法

    公开(公告)号：US4385041A

    公开(公告)日：1983-05-24

    申请号：US326078

    申请日：1981-11-30

    申请人： Klaus Jodden ,  Gero Heymer

    发明人： Klaus Jodden ,  Gero Heymer

    IPC分类号： C01B25/30 ,  C01B15/16 ,  C01B25/26

    CPC分类号： C01B25/30

    摘要： The invention relates to a process for making aqueous alkali metal phosphate solutions by subjecting aqueous alkali metal phosphite solutions to catalytic oxidation with oxygen or air. More particularly, oxygen or air in stoichiometric excess proportions is introduced into the aqueous alkali metal phosphite solution at about 30.degree. to 110.degree. C., at a pH-value of 0 to about 8, and in the presence of SiO.sub.2 or aluminum silicate containing at most 10 weight % Al.sub.2 O.sub.3, for as long as necessary to achieve conversion of the alkali metal phosphite to alkai metal phosphate. After completion of the oxidation, the aqueous solution is separated from the catalyst.

    摘要翻译： 本发明涉及通过使碱金属亚磷酸盐水溶液用氧气或空气进行催化氧化来制备碱金属磷酸盐水溶液的方法。 更具体地说，在约30℃至110℃，pH值为0至约8的条件下，在含碱金属亚磷酸盐水溶液中的化学计量过量的氧气或空气中，在含有 至多10重量％的Al 2 O 3，只要需要实现碱金属亚磷酸盐转化为磷酸金属。 氧化完成后，将水溶液与催化剂分离。

    Production of an anticorrosive pigment on phosphate basis
    40.
    发明授权
    Production of an anticorrosive pigment on phosphate basis 失效
    以磷酸盐为基础生产防腐颜料

    公开(公告)号：US4294621A

    公开(公告)日：1981-10-13

    申请号：US141135

    申请日：1980-04-16

    申请人： Alexander Maurer ,  Renate Adrian ,  Klaus Hestermann ,  Gero Heymer

    发明人： Alexander Maurer ,  Renate Adrian ,  Klaus Hestermann ,  Gero Heymer

    IPC分类号： C09D5/08 ,  C01B25/32 ,  C09C1/00 ,  C09C1/02 ,  C08K3/10

    CPC分类号： C01B25/322 ,  C01B25/325 ,  C09C1/02 ,  C01P2004/61 ,  C01P2006/12

    摘要： The invention relates to the production of phosphorus-containing anticorrosive pigments with a particle size of at most 20 microns by reacting one or more calcium or magnesium compounds with phosphoric acid or acid alkali metal or ammonium phosphates by intimately mixing an aqueous suspension or solution of the reactants inside a dispersing means rotating at a speed of 3000 to 10,000 rpm. More particularly, fine pulverulent calcium and magnesium compounds are converted, with agitation, together with water and, if desired, a water-soluble alkanol to a homogeneous suspension or solution. The suspension or solution is intimately mixed, inside the dispersing means at 0.degree. to 40.degree. C. and in an approximately stoichiometric ratio, with the phosphoric acid or acid phosphate solution. Resulting and precipitated pigment is separated and dried under mild conditions while maintaining its content of water of crystallization. The anticorrosive pigment is comprised of a homogeneous mixture and/or mixed crystals of which 10 to 95 mol % is calcium hydrogen phosphate dihydrate, the balance being magnesium hydrogen phosphate trihydrate. An at least 55 weight % proportion consists of particles with a size of up to 5 microns with a BET-surface of at least 1 m.sup.2 /g.

    摘要翻译： 本发明涉及通过使一种或多种钙或镁化合物与磷酸或酸性碱金属或铵磷酸盐反应，通过将下列物质的水性悬浮液或溶液紧密混合，从而生产粒径至多为20微米的含磷防腐颜料 分散装置内的反应物以3000至10,000rpm的速度旋转。 更具体地，精细的粉末状钙和镁化合物在搅拌下与水一起转化，如果需要，将水溶性链烷醇转化成均匀的悬浮液或溶液。 悬浮液或溶液在分散装置内在0℃至40℃下以大约化学计量比与磷酸或酸式磷酸盐溶液紧密混合。 将所得沉淀的颜料分离并在温和条件下干燥，同时保持其结晶水含量。 防腐颜料由均匀的混合物和/或其中10〜95摩尔％为磷酸氢钙二水合物的混合晶体组成，余量为磷酸氢二氢钙三水合物。 至少55重量％的比例由尺寸高达5微米，BET表面至少为1m 2 / g的颗粒组成。