Production of granular alkali metal diphosphates or triphosphates
    1.
    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。

    Process for the manufacture of finely dispersed sparingly soluble salts
of oxyacids of phosphorus
    3.
    发明授权
    Process for the manufacture of finely dispersed sparingly soluble salts of oxyacids of phosphorus 失效
    用于制造磷的含氧酸的微细分散的微溶盐的方法

    公开(公告)号:US4346065A

    公开(公告)日:1982-08-24

    申请号:US222079

    申请日:1981-01-02

    摘要: The invention relates to a process for making a finely dispersed, sparingly soluble salt of an oxyacid of phosphorus, having a maximum particle size of 20 .mu.m, by reacting a compound of a divalent metal with the oxyacid of phosphorus or an alkali metal or ammonium salt thereof. More particularly, finely dispersed salt consisting to an extent of at least 90% of particles with a size between 0.05 and 7 .mu.m is made. To this end, an at least 5% by weight aqueous solution or suspension of a compound of a divalent metal selected from the group Mg, Ca, Sr, Ba, Mn, Zn, Cu, Cd, Pb, Sn, Co and Ni is reacted, while maintaining a pH range of between 3 and 9 and while stirring, with an at least 2 mol % solution of at least one trivalent metal selected from the group Al, Fe and Cr in the oxyacid of phosphorus and, optionally, with an aqueous solution of an alkali metal or ammonium salt of the oxyacid of phosphorus, and the precipitated salt is separated off and dried.

    摘要翻译: 本发明涉及通过使二价金属的化合物与磷或碱金属或铵的含氧酸反应来制造磷的含氧酸的微细分散,微溶的最大粒度为20μm的盐的方法 的盐。 更具体地说,制备了至少90%粒度在0.05和7μm之间的颗粒的程度的精细分散的盐。 为此,选自Mg,Ca,Sr,Ba,Mn,Zn,Cu,Cd,Pb,Sn,Co和Ni中的二价金属的化合物的至少5重量%的水溶液或悬浮液是 反应,同时保持pH范围在3和9之间并在搅拌的同时,使用至少2mol%的选自Al,Fe和Cr中的至少一种选自Al,Fe和Cr的三价金属的溶液在磷的含氧酸中,并且任选地与 将磷酸的含氧酸的碱金属或铵盐的水溶液分离出来并干燥。

    Production of an anticorrosive pigment on phosphate basis
    4.
    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。

    Process for making granulated condensed phosphates
    5.
    发明授权
    Process for making granulated condensed phosphates 失效
    颗粒状缩合磷酸盐的制备方法

    公开(公告)号:US4394359A

    公开(公告)日:1983-07-19

    申请号:US303425

    申请日:1981-09-18

    CPC分类号: C11D3/062 C01B25/38 C01B25/39

    摘要: The invention relates to a process for converting water-soluble, condensed phosphates of the following general formula (I)M.sub.2 O(MPO.sub.3).sub.n (I)in which M stands for sodium, potassium or ammonium and n stands for a number between 4 and about 100, to granulate, wherein the pulverulent, water-soluble, condensed phosphate is thoroughly agitated and granulated in the presence of water and of a phosphate salt other than the condensed phosphate. More specifically, the condensed phosphate of general formula (I) or a mixture of the phosphate with an anhydrous or partially hydrated alkali metal phosphate is thoroughly agitated and granulated in the presence of water and an ammonium polyphosphate of the following general formula (II)H.sub.(n-m)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1 (II)in which n stands for an integral average value of 3 to 1000, m stands for a whole number of up to n+2, and the m/n-ratio is between about 1.0 and 1.67.

    摘要翻译: 本发明涉及一种转化下列通式(I)M 2 O(MPO 3)n(I)的水溶性缩合磷酸酯的方法,其中M代表钠,钾或铵,n代表4至约 100,其中将粉末状,水溶性的缩合磷酸盐在水和磷酸盐以外的磷酸盐的存在下充分搅拌和造粒。 更具体地,将通式(I)的缩合磷酸酯或磷酸盐与无水或部分水合的碱金属磷酸盐的混合物在水和多磷酸铵的存在下充分搅拌并造粒,通式为(II)H (nm)+2(NH4)mPnO3n + 1(II)其中n表示3〜1000的积分平均值,m表示n + 2的整数,m / n比在 约1.0和1.67。

    Process for making mixed granulates from condensed phosphates and
builder salts
    6.
    发明授权
    Process for making mixed granulates from condensed phosphates and builder salts 失效
    从缩合磷酸盐和助洗剂盐制备混合颗粒的方法

    公开(公告)号:US4517109A

    公开(公告)日:1985-05-14

    申请号:US542075

    申请日:1983-10-14

    IPC分类号: C11D3/06 C11D7/16

    CPC分类号: C11D3/06 C11D3/062

    摘要: The disclosure provides a process for making mixed granulates from water-soluble condensed phosphates and at least one builder salt by subjecting the components making the granulate to granulation in the presence of water. To this end, the disclosure provides:(a) for water to be sprayed on to a mixture of the condensed phosphate, the builder salt and an ammonium polyphosphate as a binder, and for the mixture to be granulated, or(b) for an aqueous solution or suspension of ammonium polyphosphate to be sprayed on to the mixture of condensed phosphate and builder salt, and for the mixture to be granulated.

    摘要翻译: 本公开提供了一种由水溶性缩合磷酸盐和至少一种助洗剂盐制备混合颗粒的方法,该方法是使制粒颗粒的组分在水存在下进行造粒。 为此,本公开内容提供:(a)将水喷雾到缩合磷酸盐,助洗剂盐和作为粘合剂的多磷酸铵的混合物上,并且对于待造粒的混合物,或(b) 水溶液或多磷酸铵的悬浮液喷雾到缩合磷酸盐和助洗剂盐的混合物中,并将混合物制粒。

    Process for making granulated alkali metal orthophosphates
    7.
    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 Maddrell salt
    9.
    发明授权
    Production of Maddrell salt 失效
    Maddrell盐的生产

    公开(公告)号:US4162300A

    公开(公告)日:1979-07-24

    申请号:US945502

    申请日:1978-09-25

    CPC分类号: C01B25/445

    摘要: Pure Maddrell salt is produced by heating sodium phosphate to temperatures of 250.degree. to 420.degree. C. The sodium phospate used as starting material is sodium trimetaphosphate or a mixture of sodium trimetaphosphate with Maddrell salt, monosodium orthophosphate or disodium pyrophosphate, the mixture containing Na and P in a molar ratio of 1:1. Prior to heating the starting material, it is admixed with 0.5 to 5 weight% of orthophosphoric acid, polyphosphoric acid, phosphorus pentoxide or at least one salt of a volatile base forming polyphosphoric acid at the temperatures specified. The resulting mixture is calcined over the period necessary to transform the starting material to Maddrell salt.

    摘要翻译: 纯麦德雷尔盐是通过将磷酸钠加热至250-420℃的温度而制得的。用作原料的磷酸钠是三偏磷酸钠或三偏磷酸钠与马德雷尔盐,正磷酸单钠或焦磷酸二钠的混合物,混合物含有Na和 P的摩尔比为1:1。 在加热原料之前,在指定的温度下与0.5-5重量%的正磷酸,多磷酸,五氧化二磷或至少一种形成多磷酸的挥发性碱的盐混合。 将所得混合物在将起始材料转化为Maddrell盐所需的时间内煅烧。

    Process for the preparation of ammonium polyphosphate
    10.
    发明授权
    Process for the preparation of ammonium polyphosphate 失效
    制备聚对苯二甲酸一铵的方法

    公开(公告)号:US5139758A

    公开(公告)日:1992-08-18

    申请号:US731541

    申请日:1991-07-17

    IPC分类号: C01B25/40

    CPC分类号: C01B25/405

    摘要: To prepare essentially water-insoluble, chain-form ammonium polyphosphate from equimolar amounts of di- ammonium phosphate and phosphorus pentoxide in the presence of ammonia at temperatures of from 170.degree. to 350.degree. C. with constant mixing, kneading and comminution, at least some of the diammonium phosphate and phosphorus pentoxide is replaced by partially ammoniated polyphosphoric acid.A plant for carrying out this process can comprise a sealed reactor (1) which is provided with metering devices (2, 3) and feed tubes (4, 5) for phosphorus pentoxide and diammonium orthophosphate, an ammonia feed tube (8), an ammonium polyphosphate discharge tube (9) and a line for offgas. Rotatable mixing, kneading and comminution elements are provided inside the reactor (1). Furthermore, a heatable stirred tank (11) which can be charged with polyphosphoric acid via a feed line (13) is provided and can be used to remore water vapor and ammonia from the offgas flowing from the reactor (1) via the line (20) and from which partially ammoniated polyphosphoric acid can be introduced into the reactor (1) via an outlet line (17).

    摘要翻译: 在氨存在下,在170〜350℃的温度下,从等摩尔量的磷酸二氢铵和五氧化二磷基本上制备水不溶性的链状多磷酸铵,同时进行不断的混合,捏和和粉碎 的磷酸氢二铵和五氧化二磷被部分氨化的多磷酸代替。 用于进行该方法的设备可以包括密封反应器(1),该反应器设置有用于五氧化二磷和正磷酸二铵的计量装置(2,3)和进料管(4,5),氨进料管(8), 多磷酸铵放电管(9)和废气管线。 在反应器(1)内设置可旋转混合,捏合和粉碎元件。 此外,提供了可以通过进料管线(13)装入多磷酸的可加热搅拌罐(11),并且可用于通过管线(20)从从反应器(1)流出的废气中再次蒸发水蒸气和氨 ),并且可以通过出口管线(17)将部分氨化的多磷酸从其中引入反应器(1)。