Process for making granulated alkali metal orthophosphates
    11.
    发明授权
    Process for making granulated alkali metal orthophosphates 失效
    制造造粒的碱金属正磷酸盐的方法

    公开(公告)号:US4385040A

    公开(公告)日:1983-05-24

    申请号:US344481

    申请日:1982-02-01

    CPC分类号: C01B25/308

    摘要: The disclosure relates to a process for making granulated, hydrated alkali metal orthophosphates. To this end, the disclosure provides for one or more anhydrous or partially hydrated alkali metal orthophosphates presenting a degree of hydration of less than 90%, based on the theoretically possible degree of hydration, and containing an at least 20% proportion of particles with a size of less than 0.045 mm, to be intensively mixed and granulated with water and an ammonium polyphosphate.

    摘要翻译: 本公开涉及制备颗粒状,水合的碱金属正磷酸盐的方法。 为此,本发明基于理论上可能的水合度,提供一种或多种无水或部分水合的碱金属正磷酸盐,其具有小于90%的水合度,并且含有至少20%比例的颗粒与 尺寸小于0.045mm,将被浓缩混合并用水和多磷酸铵制粒。

    Production of aluminum polyphosphate
    12.
    发明授权
    Production of aluminum polyphosphate 失效
    生产聚磷酸铝

    公开(公告)号:US4147758A

    公开(公告)日:1979-04-03

    申请号:US794959

    申请日:1977-05-09

    CPC分类号: C04B12/022 C01B25/40

    摘要: Aluminum polyphosphate is made. To this end, solid aluminum hydroxide and polyphosphoric acid which are used in proportions corresponding to an Al:P molar ratio of 1:2.5 to 1:3.5, are introduced separately from, but concurrently with, one another into a reaction zone kept at 150.degree. to 200.degree. C. A moist friable consistency of the starting materials is maintained in the reaction zone by continuously mixing, kneading and comminuting them over substantially the entire period during which they are introduced into the reaction zone. The reaction is continued until a dry sandy powder is formed; and the powder is annealed at 400.degree. to 600.degree. C. over a period sufficient to yield a product undergoing a 0.5 to 1% weight loss on ignition.

    摘要翻译: 制成聚磷酸铝。 为此,以与Al:P摩尔比为1:2.5〜1:3.5的比例使用的固体氢氧化铝和多磷酸分别从彼此分开引入到保持在150℃的反应区中 通过在它们被引入反应区域的基本上整个时间段内连续地混合,捏合和粉碎它们,在反应区域中维持起始材料的潮湿脆性稠度。 继续反应直至形成干燥的沙质粉末; 并将粉末在400℃至600℃下退火一段足以产生在点火时经历0.5至1重量%失重的产物。

    Hardeners for use in water-glass cement compositions and process for
making them
    13.
    发明授权
    Hardeners for use in water-glass cement compositions and process for making them 失效
    用于水玻璃水泥组合物的硬化剂及其制备方法

    公开(公告)号:US4138261A

    公开(公告)日:1979-02-06

    申请号:US881727

    申请日:1978-02-27

    CPC分类号: C04B22/16 C01B25/40

    摘要: Hardeners of condensed aluminum phosphates for use in water-glass cementing compositions and process for making them. The hardeners consist substantially of a short chain aluminum polyphosphate with a chain length of 3 to 6 and a long chain aluminum polyphosphate with a chain length or more than 40. Quick-setting hardeners contain a high proportion of the short chain component and slow-setting hardeners contain a high porportion of the long chain component.

    摘要翻译: 用于水玻璃胶合组合物的浓缩磷酸铝的硬化剂及其制备方法。 硬化剂基本上由链长为3至6的短链多磷酸铝和长链或多于40的长链多磷酸铝组成。快速固化硬化剂含有高比例的短链组分和缓慢沉降 硬化剂含有长链组分的高比例。

    Production of granular alkali metal diphosphates or triphosphates
    14.
    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

    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。

    Production of an anticorrosive pigment on phosphate basis
    17.
    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

    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。