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    Roasting of pyrite
    5.
    发明授权
    Roasting of pyrite 失效
    PYRITE的磨光

    公开(公告)号：US3589866A

    公开(公告)日：1971-06-29

    申请号：US3589866D

    申请日：1969-09-24

    Applicant: DORR OLIVER INC

    Inventor： ROBERTS ELLIOTT J

    IPC: C01B17/06 ,  C22B1/10

    CPC classification number: C22B1/10 ,  C01B17/06

    Abstract: A PROCESS FOR IMPROVING THE EFFICIENCY OF GENERATING ELEMENTAL SULFUR FROM THE ROASTING OF PYRITE COMPRISING PRECLASSIFYING THE PYRITE; ROASTING THE COARSE FRACTION IN A MAIN ROASTING SYSTEM; ROASTING THE FINE FRACTION IN AN AUXILIARY ROASTING SYSTEM; AND COMBINING AT LEAST PART OF THE PRODUCT OF THE AUXILIARY ROASTING SYSTEM WITH ONE OF THE PRODUCTS OF THE MAIN ROASTING SYSTEM.

    Process for the manufacture of phosphoric acid
    6.
    发明授权
    Process for the manufacture of phosphoric acid 失效
    制备磷酸的方法

    公开(公告)号：US3552919A

    公开(公告)日：1971-01-05

    申请号：US3552919D

    申请日：1968-05-13

    Applicant: DORR OLIVER INC

    Inventor： ROBERTS ELLIOTT J

    IPC: C01B25/22 ,  C01B25/234 ,  C01B25/18 ,  C01B17/14

    CPC classification number: C01B25/2343 ,  C01B25/22

    Abstract: PROCESS FOR PRODUCING PHOSPHORIC ACID BY THE ACIDULATION OF PHOSPHATE ROCK WHEREIN SUBSTANTIALLY ALL THE REQUIRED ACID IS REGENERATED WITHIN THE PROCESS. THE PREFERRED PROCESS COMPRISES THE STEPS OF TREATING BY-PRODUCT CALCIUM SULPHATE, IN THE FORM OF GYPSUM, WITH AMMONIUM CARBONATE TO PRODUCE AMMONIUM SULPHATE AND CALCIUM CARBONATE, THEREAFTER REACTING THE THUS PRODUCED AMMONIUM SULPHATE WITH FLUOSILICIC ACID TO PRODUCE AMMONIUM FLUOSILICATE CRYSTALS AND SULPHURIC ACID. THE FLUOSILICIC ACID IS REGENERATED BY REACTING THE RESULTING AMMONIUM FLUOSILICATE WITH AMMONIUM BISULPHATE, TO PRODUCE FLUORSILICIC ACID AND AMMONIUM SULPHATE. THE AMMONIUM SULPHATE IS HEATED TO DRIVE OFF AMMONIUM AND REGENERATE AMMONIUM BISULPHATE.

    Fluid bed incineration of wastes containing alkali metal chlorides
    10.
    发明授权
    Fluid bed incineration of wastes containing alkali metal chlorides 失效
    流化床焚烧含有碱金属氯化物的废物

    公开(公告)号：US3907674A

    公开(公告)日：1975-09-23

    申请号：US46365574

    申请日：1974-04-24

    Applicant: DORR OLIVER INC

    Inventor： ROBERTS ELLIOTT J ,  ANGEVINE PETER ALLEN

    IPC: B09B3/00 ,  B01J8/24 ,  B01J8/32 ,  C02F11/06 ,  F23C10/00 ,  F23G5/00 ,  F23G5/30 ,  F27B15/00 ,  C02B1/34 ,  F23D19/00

    CPC classification number: B01J8/32 ,  F23G5/30 ,  F23G2209/10 ,  Y02W10/40 ,  Y10S423/16

    Abstract: Combustible waste materials containing alkali metal chlorides and sulfur and/or sulfates are incinerated in a fluid bed reactor by a process in which formation of low melting eutectics is avoided. The temperature of the fluid bed is maintained substantially above the vapor saturation temperatures of the alkali metal chlorides so that they are to a great extent carried out with the combustion gases. By insuring the presence of sufficient reactive silica and a sufficiently high temperature, alkali metal sulfates can be prevented from accumulating. Any sticky alkali metal silicate glasses which tend to form are prevented from causing defluidization by insuring the presence of sufficient CaO, MgO, Fe2O3 and/or Al2O3 so that the glass is converted into high melting silicate compounds.

    Abstract translation: 含有碱金属氯化物和硫和/或硫酸盐的可燃废料通过避免形成低熔点共晶体的方法在流化床反应器中焚烧。 流化床的温度基本上保持在碱金属氯化物的蒸气饱和温度以上，使得它们在很大程度上与燃烧气体一起进行。 通过确保足够的反应性二氧化硅和足够高的温度的存在，可以防止碱金属硫酸盐积聚。 通过确保足够的CaO，MgO，Fe 2 O 3和/或Al 2 O 3的存在来防止倾向于形成的任何粘性碱金属硅酸盐玻璃引起脱墨，使得玻璃转化为高熔点硅酸盐化合物。

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