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    Process for the manufacture of polyphosphates
    1.
    发明授权
    Process for the manufacture of polyphosphates 失效
    制备聚磷酸酯的方法

    公开(公告)号：US3449068A

    公开(公告)日：1969-06-10

    申请号：US3449068D

    申请日：1967-02-07

    Applicant: KNAPSACK AG

    Inventor： HARTLAPP GERHARD ,  KOWALSKI WERNER ,  KLEE HELMUT

    IPC: C01B25/41 ,  C01B25/30 ,  C01B25/28

    CPC classification number: C01B25/412

    Abstract: 1,133,045. Polyphosphates. KNAPSACK A.G. 9 Feb., 1967 [9 Feb., 1966; 16 July, 1966], No. 6158/67. Heading C1A. Polyphosphates are produced by spraying an alkali metal or alkaline earth metal orthophosphate solution or suspension in a spray tower, in the presence of a reducing substance, especially a low-valent phosphorus compound, at 200‹ to 500‹ C., wherein said orthophosphate solution or suspension is so combined with an oxidant solution oxidizing the reducing substance and its decomposition products, that the contact time of said orthophosphate solution or suspension with the oxidant is less than 1 second, preferably 0À1 to 0.3 second, and the combined solutions are thereafter sprayed jointly. The orthophosphate solution, preferably supplied hot, may be contacted with the oxidant inside the turbulence chamber of a spray nozzle. Preferred oxidants are peroxides and alkali metal nitrates and chlorates, and the oxidant is preferably supplied at below 35‹ C. Low bulk density products may be obtained by jointly spraying an alkali metal or ammonium carbonate or bicarbonate solution with the orthophosphate. The spray tower may be heated by means of a gas containing 0 to 2000 milligrams of elementary or combined phosphorus per cubic metre, for example a gas originating from phosphorus production. The orthophosphates may be contaminated with organic compounds, preferably not more than 3% by weight on the P 2 0 5 .

    Transformation of phosphorus compounds obtained as by-products
    2.
    发明授权
    Transformation of phosphorus compounds obtained as by-products 失效
    作为副产物获得的磷化合物的转化

    公开(公告)号：US3656898A

    公开(公告)日：1972-04-18

    申请号：US3656898D

    申请日：1969-05-14

    Applicant: KNAPSACK AG

    Inventor： HARNISCH HEINZ ,  THUMMLER URSUS ,  TRAULSEN KARL ,  HARTLAPP GERHARD

    IPC: C01B25/18 ,  C01B25/24 ,  C01B25/39 ,  C01B25/12

    CPC classification number: C01B25/395 ,  C01B25/18 ,  C01B25/24

    Abstract: A process whereby substantially low-valent phosphorus-containing compounds in waste by-products obtained in the manufacture of mineral and organic phosphorus compounds are converted into useful phosphoric acid, polyphosphoric acid, or corresponding alkali metal salts thereof despite the presence of partially noncombustible material, organic pentavalent compounds, and nonphosphorus-containing compounds within said material; by introducing the by-products into an elemental phosphorus-oxygen flame having excess oxygen, the by-products being introduced in an amount so as not to exceed 50 percent by weight of the elemental phosphorus being burned in said flame.

    Abstract translation: 在矿物和有机磷化合物的制造中获得的废弃副产物中基本上低价的含磷化合物转化为有用的磷酸，多磷酸或其相应的碱金属盐的方法，尽管存在部分不可燃的 材料，有机五价化合物和所述材料内的非含磷化合物; 通过将副产物引入具有过量氧的元素磷氧火焰中，副产物的引入量不超过在所述火焰中燃烧的元素磷的50重量％。

    Process for the manufacture of alkali metal phosphates
    7.
    发明专利
    Process for the manufacture of alkali metal phosphates 未知

    公开(公告)号：GB887749A

    公开(公告)日：1962-01-24

    申请号：GB3918659

    申请日：1959-11-18

    Applicant: KNAPSACK AG

    Inventor： HARTLAPP GERHARD ,  BIELENBERG WALDEMAR ,  KRIBBE HARRI

    IPC: C01B25/30 ,  C01B25/39

    Abstract: Alkali metal phosphates of the type (P2O5)x (Na2O)y, where the ratio x:y is between 1 and 0,5, are prepared by feeding finely divided alkali metal chloride, specifically sodium or potassium chloride, in the presence of oxygen but in the absence of water vapour, into a downwardly-directed phosphorus flame fed with molten phosphorus. In order to prevent the formation of phosphorus oxychloride, the oxygen should be in at least 30% stoichiometric excess. The hot reaction product is dissolved outside the flame region in an aqueous medium preferably having a pH of 7 or less, whereby the chlorine formed is not dissolved. The alkali metal chloride is sprayed into the flame by a nozzle at about the same height as the phosphorus inlet or higher. According to a typical example sodium chloride, substantially all of which is below 0,1 mm. particle size, is suspended in oxygen and atomized into a phosphorous flame fed with molten phosphorus and oxygen-enriched air in proportions such that the P2O5:Na2O ratio is 1:1,3. The flame temperature is about 2000 DEG C.; the reaction product leaves at 600-700 DEG C. and is cooled by chilling with water and simultaneously dissolved. Crystallized phosphate is obtained from the solution by known methods. The hot waste gases still contain about 10% of alkali metal phosphate and are washed with concentrated phosphoric acid solution, whereby the phosphate is separated and chlorine gas, suitable for the production of hydrochloric acid, remains. A further example relates to potassium chloride.

    Spray-drying
    10.
    发明专利
    Spray-drying 未知

    公开(公告)号：GB817520A

    公开(公告)日：1959-07-29

    申请号：GB1761657

    申请日：1957-06-03

    Applicant: KNAPSACK AG

    Inventor： RODIS FRANZ ,  HARTLAPP GERHARD ,  BELTZ KLAUS

    IPC: B01D1/16 ,  B01D1/18 ,  C01B25/41

    Abstract: A process for concentrating and drying solutions or removing water of constitution comprises atomizing the solution or material by means of a nozzle into a flame zone located above a fall zone, said flame zone being in the form of an inverted cone, and spraying uniformly from above into the interior of the flame cone. In a preferred apparatus for carrying out the process, a material 9 to be treated is sprayed through nozzle 8 into a flame zone 7 produced by ring burner 6 and then passes into the atomization tower 2. Hot waste gases together with the resulting final product pass off through line 10 to a cyclone separator in which the product is removed, the gases are conducted through the heat exchanger 4 in countercurrent to fresh air which enters by supply line 12 and is then fed to the top of the atomization tower. The nozzle is preferably arranged above the ring burner at a distance equal to up to half the diameter of the ring burners. In examples: (1) and (2) sodium phosphate is produced by spraying a mixture of phosphoric acid and sodium carbonate; in (3) CaCl2 is dehydrated; and in (4) sodium sulphate is produced in anhydrous form.

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