公开(公告)号：US4438083A

公开(公告)日：1984-03-20

申请号：US418547

申请日：1982-09-15

申请人： Michael H. Willems ,  Winfried J. W. Vermijs

发明人： Michael H. Willems ,  Winfried J. W. Vermijs

IPC分类号： C01C1/18 ,  C01F5/38 ,  C05C1/02 ,  C01F11/14

CPC分类号： C01C1/18 ,  C01C1/185 ,  C01F5/38 ,  C05C1/02 ,  C01P2006/12

摘要： Process for preparing magnesium nitrate hexahydrate without the need for filtering aids. A process for preparing magnesium nitrate hexahydrate essentially comprises: (a) forming a magnesium oxide or magnesium carbonate suspension in melted magnesium nitrate hexahydrate at a suspension temperature in excess of 90.degree. C.; (b) adding a nitric acid solution to the suspension while stirring thereby forming a reaction mixture containing additional magnesium nitrate hexahydrate; (c) filtering the liquid reaction mixture to obtain a clear magnesium nitrate hexahydrate filtrate; (d) discharging as product a part, corresponding to the amount of magnesium oxide or magnesium carbonate introduced, of the liquid magnesium nitrate hexahydrate obtained as clear filtrate; (e) utilizing the remaining part as liquid medium for the conversion of magnesium oxide or magnesium carbonate with nitric acid. Thermally stabilized ammonium nitrate containing granules may also be prepared containing magnesium nitrate hexahydrate according to the above process.

摘要翻译： 制备硝酸镁六水合物的方法，无需过滤助剂。 制备硝酸镁六水合物的方法主要包括：（a）在熔融的硝酸镁六水合物中在悬浮温度超过90℃下形成氧化镁或碳酸镁悬浮液。 （b）在搅拌下向该悬浮液中加入硝酸溶液，形成含有另外的硝酸镁六水合物的反应混合物; （c）过滤液体反应混合物，得到透明的硝酸镁六水合物滤液; （d）将作为透明滤液得到的液体硝酸镁六水合物的一部分相当于导入的氧化镁或碳酸镁的量排出的部分; （e）利用剩余部分作为液体介质，用于将氧化镁或碳酸镁与硝酸转化。 根据上述方法，还可以制备含有水合硝酸铵的颗粒，其含有六水合硝酸镁。

公开(公告)号：US3988398A

公开(公告)日：1976-10-26

申请号：US523005

申请日：1974-11-11

申请人： Johan W. Frenken ,  Michael H. Willems

发明人： Johan W. Frenken ,  Michael H. Willems

IPC分类号： B01J2/02 ,  B01J2/04 ,  B22F9/10

CPC分类号： B01J2/04

摘要： An improved method for spraying molten material in order to obtain solidified grains or prills. Molten material, such as NPK-fertilizer is fed into a symetrical rotating reservoir which rotates about a vertical axis and whose upright walls are provided with apertures for spraying. The interior of the rotating reservoir accommodates a member provided with blades, which member rotates at a speed different from that of the reservoir. The sprayed molten material cools while falling to form solid round prills. The blades inside the reservoir rotate at a speed at least 1.5 times greater than the speed of rotation for the reservoir.

摘要翻译： 一种用于喷射熔融材料以获得固化的颗粒或颗粒的改进方法。 将熔化的材料（例如NPK-肥料）进料到相对旋转的储存器中，该储存器围绕垂直轴线旋转，并且其直立壁上设置有用于喷洒的孔。 旋转储存器的内部容纳设置有叶片的构件，该构件以与储存器的速度不同的速度旋转。 喷射的熔融材料在下落时冷却，形成固体圆形颗粒。 储存器内的叶片的旋转速度至少比储存器的旋转速度大1.5倍。

公开(公告)号：US4675440A

公开(公告)日：1987-06-23

申请号：US816055

申请日：1986-01-03

申请人： Stanislaus M. P. Mutsers ,  Michael H. Willems ,  Wilhelmus P. Wolvers

发明人： Stanislaus M. P. Mutsers ,  Michael H. Willems ,  Wilhelmus P. Wolvers

IPC分类号： C07C63/06 ,  C07C51/00 ,  C07C51/265 ,  C07C51/42 ,  C07C51/43 ,  C07C51/487 ,  C07C67/00

CPC分类号： C07C51/43 ,  C07C51/42 ,  C07C51/487

摘要： The invention relates to a process for preparing purified, virtually odorless, solid benzoic acid obtained from toluene by oxidation with a gas containing molecular oxygen, by means of a treatment using an inert gas or gas mixture, wherein the benzoic acid to be purified is supplied in a liquid state to a fluid or spouted bed granulator in which the prevailing temperature is below the solidification temperature of the benzoic acid and in which the benzoic acid is treated, during and possibly after the granulating process, with the said gas or gas mixture, the impurities present being taken up in whole or in part in the gas or gas mixture, upon which the benzoic acid thus purified is removed from the fluid or spouted bed device.

摘要翻译： 本发明涉及一种通过使用惰性气体或气体混合物的处理通过用含有分子氧的气体氧化由甲苯获得的纯净的，无味的固体苯甲酸的方法，其中提供待提纯的苯甲酸 处于液态或流态或喷射式造粒机，其中主要温度低于苯甲酸的固化温度，并且其中苯甲酸在造粒过程中和可能的过程中与所述气体或气体混合物一起被处理， 存在的杂质全部或部分被吸收在气体或气体混合物中，其中如此纯化的苯甲酸从流体或喷射床装置中除去。

公开(公告)号：US4390483A

公开(公告)日：1983-06-28

申请号：US248439

申请日：1981-03-27

申请人： Michael H. Willems ,  Jan W. Klok

发明人： Michael H. Willems ,  Jan W. Klok

IPC分类号： B01J2/02 ,  B01J2/04 ,  C05C9/00

CPC分类号： C05C9/005 ,  B01J2/04

摘要： A method for producing urea prills by passing molten droplets of substantially water free urea downwardly through a cooling zone countercurrent to a cooling gas. A dispersion of crystalline particles is maintained in at least a portion of the cooling zone, the crystalline particles having average dimensions of between 2 and 10 microns and being dispersed in the cooling gas in a quantity of between about 8 and 25 mg per m.sup.3 of the cooling gas at ambient temperature and pressure, whereby urea prills, built up of relatively small crystallites with random orientation having improved impact strength are formed.

摘要翻译： 通过使基本上无水的尿素的熔融液滴向下通过与冷却气体逆流的冷却区域来生产尿素颗粒的方法。 结晶颗粒的分散体保持在冷却区的至少一部分中，结晶颗粒具有2至10微米的平均尺寸，并以约3至25mg / m3的量分散在冷却气体中 在环境温度和压力下冷却气体，由此形成具有随机取向的具有改进的冲击强度的相对较小的微晶的尿素颗粒。