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    Method of crystallizing aluminium sulphate solutions to form dust-free granules having uniform grain size
    1.
    发明授权
    Method of crystallizing aluminium sulphate solutions to form dust-free granules having uniform grain size 失效
    使硫酸铝溶液结晶以形成具有均匀晶粒尺寸的无尘颗粒的方法

    公开(公告)号：US4276052A

    公开(公告)日：1981-06-30

    申请号：US21205

    申请日：1979-03-16

    申请人： Egon Boisen Schmidt ,  Josef K. S. Zechner ,  Gosta M. Frang

    发明人： Egon Boisen Schmidt ,  Josef K. S. Zechner ,  Gosta M. Frang

    IPC分类号： B01D9/02 ,  C01F7/74

    CPC分类号： C01F7/746

    摘要： A method of crystallizing a solution of aluminium sulphate to form crystal agglomerates having an essentially uniform grain size and being in the form of granules having a characteristic appearance and good storage properties. A solution having a temperature of 105.degree.-115.degree. C. and a concentration of 14.5-16.8% by weight of Al.sub.2 O.sub.3 is brought to crystallize onto a bed of crystalline aluminium sulphate in a drum, the length of which is considerably larger than the diameter, a temperature of 70.degree.-95.degree. C. being maintained in the bed. Part of the crystalline product discharged from the drum is ground and recycled to the drum in an amount of 40-200 percent by weight of added solution and air is passed through the drum to remove moisture evolved by the crystallization so as to form a final product with more than 75% by weight present in the crystalline state and containing 15.0-18.0% by weight of Al.sub.2 O.sub.3.

    摘要翻译： 一种使硫酸铝溶液结晶以形成具有基本均匀晶粒尺寸并且具有特征外观和良好储存性能的颗粒形式的结晶聚集体的方法。 将温度为105-115℃，浓度为14.5-16.8％（重量）的Al2O3的溶液在鼓中结晶的硫酸铝床上结晶，其长度远大于直径 在床中保持70〜-95℃的温度。 从滚筒中排出的部分结晶产物被研磨并循环到滚筒中，其量为加入的溶液的40-200重量％，空气通过滚筒以除去通过结晶放出的水分，从而形成最终产物 存在结晶状态的超过75重量％并含有15.0-18.0重量％的Al 2 O 3。

    Production of aluminum sulfate
    2.
    发明授权
    Production of aluminum sulfate 失效
    生产硫酸铝

    公开(公告)号：US4039615A

    公开(公告)日：1977-08-02

    申请号：US644923

    申请日：1975-12-29

    申请人： Yasuie Mikami ,  Ippo Takei ,  Kazuo Soma ,  Yasuo Morimoto

    发明人： Yasuie Mikami ,  Ippo Takei ,  Kazuo Soma ,  Yasuo Morimoto

    IPC分类号： C01F7/74 ,  C30B7/00 ,  B01D9/02

    CPC分类号： C01F7/748 ,  C01F7/746 ,  C30B29/10 ,  C30B7/00

    摘要： Hexagonal plate crystals of aluminum sulfate are produced in chemically pure form by a process which comprises cooling a heated saturated solution of chemically impure aluminum sulfate acidified with sulfuric acid to precipitate crystals of aluminum sulfate, heating the slurry of the cooled solution containing the precipitated aluminum sulfate crystals to a predetermined temperature wherein the temperature is maintained for a time sufficient to dissolve a portion of the crystals in the solution, cooling the heated slurry to precipitate aluminum sulfate crystals, and separating the precipitated crystals from the slurry.

    摘要翻译： 硫酸铝的六角板晶体通过包括冷却用硫酸酸化的化学不纯的硫酸铝的加热饱和溶液来沉淀硫酸铝晶体的方法以化学纯的形式生产，加热含有沉淀的硫酸铝的冷却溶液的浆液 晶体到预定温度，其中保持温度足以溶解溶液中的一部分晶体的时间，冷却加热的浆料以沉淀硫酸铝晶体，并将沉淀的晶体与浆料分离。

    Process for obtaining an aluminum sulfate hydrate from an impure sulfuric acid solution of aluminum sulfate
    6.
    发明授权
    Process for obtaining an aluminum sulfate hydrate from an impure sulfuric acid solution of aluminum sulfate 失效
    从硫酸铝的不纯硫酸溶液中获得硫酸铝水合物的方法

    公开(公告)号：US4171205A

    公开(公告)日：1979-10-16

    申请号：US973932

    申请日：1978-12-28

    申请人： Jean M. Lamerant ,  Joseph Cohen ,  Pierre Maurel

    发明人： Jean M. Lamerant ,  Joseph Cohen ,  Pierre Maurel

    IPC分类号： C01F7/74 ,  B01D9/02

    CPC分类号： C01F7/746

    摘要： Process for recovering aluminum in the form of a specific acid sulfate from an initial solution containing aluminum in the form of dissolved aluminum sulfate hydrate in which the specific acid sulfate is of the formula Al.sub.2 (SO.sub.4).sub.3.0.5H.sub.2 SO.sub.4.11 to 12 H.sub.2 O and in which the initial solution is sequentially treated in a series of crystallizers, wherein successive crystallizers are maintained at a predetermined decreased generally fixed temperature such that in each crystallizer a state of supersaturation of aluminum acid sulfate exists and the parameters attendant operation of each crystallizer insure that a state of static equilibrium of precipitation of product is generally reached before the process solution/slurry is passed to a successive crystallizer, or filtered for recovery of product.

    摘要翻译： 从具有硫酸铝水合物形式的铝的初始溶液中回收特定酸式硫酸盐形式的铝的方法，其中特定酸式硫酸盐具有式Al 2（SO 4）3.0·5H 2 SO 4·11·12H 2 O和 其中初始溶液在一系列结晶器中连续处理，其中连续的结晶器保持在预定的降低的通常固定的温度，使得在每个结晶器中存在酸式硫酸铝的过饱和状态，并且每个结晶器的伴随操作的参数确保 通常在将工艺溶液/浆料通入连续结晶器之前通常达到产物沉淀的静态平衡状态，或过滤以回收产物。