Method and apparatus for granulation and granulated product
    95.
    发明授权
    Method and apparatus for granulation and granulated product 失效
    造粒和造粒产品的方法和装置

    公开(公告)号:US5100592A

    公开(公告)日:1992-03-31

    申请号:US631249

    申请日:1990-12-20

    摘要: A method of melt granulation for powdery material is disclosed wherein the powdery material is discharged onto the upper surface of a heated rotary spreader for migration under centrifugal force to the periphery of the spreader accompanying by melting of a portion of the material and enrobing of non-melted particles by the melted material for discharge as enlarged granules from the periphery of the spreader. To improve the quality of the granules produced, the feed material is supplied to the spreader at two separate locations. The first location is the central portion of the spreader to provide the melted material and the second location is adjacent to the periphery of the spreader. The spreader is preferably in the form of a concave bowl or inverted truncated cone or dish. Feed material is supplied to the first location by a screw feeder extending down the side of the dish and at the second location by a rotary vaned distributor located within the dish which radially flings the feed material onto the inclined dish wall. The process and apparatus is particularly useful for the production of non-sticky granules which are difficult to form when a single central feed of material is used.

    摘要翻译: 公开了一种用于粉末材料的熔体制粒方法,其中粉末材料被排放到加热的旋转撒布机的上表面上,用于在离心力下向扩散器的周边迁移,伴随着材料的一部分的熔化并且引入非均相 通过熔化的材料熔化的颗粒作为从扩散器的周边扩大的颗粒排出。 为了提高生产的颗粒的质量,将饲料在两个不同的位置供应到撒布机。 第一位置是吊具的中心部分,以提供熔化的材料,第二位置与吊具周边相邻。 撒布机优选为凹碗或倒圆锥形或碟形的形式。 通过在盘的侧面延伸的螺旋进料器将进给材料供给到第一位置,并且在第二位置处,通过位于盘内的旋转式叶片式分配器将进料材料径向地旋转到倾斜的盘壁上。 该方法和设备对于生产当使用单一中心原料进料时难以形成的非粘性颗粒特别有用。

    Process for the purification of benzoic acid by distillation with an
amine
    97.
    发明授权
    Process for the purification of benzoic acid by distillation with an amine 失效
    用胺蒸馏纯化苯甲酸的方法

    公开(公告)号:US5037512A

    公开(公告)日:1991-08-06

    申请号:US395229

    申请日:1989-08-17

    CPC分类号: C07C51/44 C07C51/487

    摘要: A process for the purification of crude benzoic acid obtained by the catalytic oxidation of toluene in the liquid phase, which is contaminated with impurities including phthalic acid and benzylbenzoate, the process involves distilling the crude benzoic acid in a first distillation in the presence of an aliphatic amine or a mixture of aliphatic amines of the formulaHNR.sup.1 R.sup.2whereinR.sup.1 represents hydrogen or a straight-chain or branched hydroxyalkyl or aminoalkyl radical with 1 to 6 carbon atoms andR.sup.2 represents a straight-chain or branched hydroxyalkyl or aminoalkyl radical with 1 to 6 carbon atoms,and/or the salts of these amines, recovering from this distillation (a) a purified benzoic acid and (b) a benzylbenzoate containing residue, working up the residue by a second distillation and chlorinating the distillate resulting from this second distillation to give a benzoylchloride virtually free of benzonitrile.

    摘要翻译: 通过在液相中甲苯的催化氧化获得的粗苯甲酸的方法,其被杂质包括邻苯二甲酸和苄基苯甲酸酯污染,所述方法包括在脂肪族的存在下,在第一次蒸馏中蒸馏粗苯甲酸 胺或式HNR1R2的脂族胺的混合物,其中R 1表示氢或具有1至6个碳原子的直链或支链羟烷基或氨基烷基,R 2表示具有1至6个碳的直链或支链羟烷基或氨基烷基 原子和/或这些胺的盐,从该蒸馏中回收(a)纯化的苯甲酸和(b)含有苄基苯甲酸酯的残余物,通过第二次蒸馏处理残余物并氯化由该第二次蒸馏得到的馏出物,得到 实际上不含苄腈的苯甲酰氯。

    Liquid crystalline compound
    99.
    发明授权
    Liquid crystalline compound 失效
    液晶化合物

    公开(公告)号:US4814476A

    公开(公告)日:1989-03-21

    申请号:US101773

    申请日:1987-09-28

    CPC分类号: C07D239/26 C09K19/3463

    摘要: A liquid crystalline compound represented by the following general formula: ##STR1## where m and l represent individually integers within a range: 6.ltoreq.m.ltoreq.14 and 1.ltoreq.l.ltoreq.5, the symbol * represents an asymmetric carbon atom and the compound is required to be optically active. The compound can induce the twisting arrangement when added to the TN system or phase transition type liquid crystal mixture, as well as can improve the spontaneous polarization as the index of the ferroelectric property when added to the SmC* liquid crystal mixture.

    摘要翻译: 由以下通式表示的液晶化合物:其中m和l分别表示在6≤n≤14和1≤1的范围内的整数,符号 *表示不对称碳原子,该化合物需要是光学活性的。 当添加到TN系统或相变型液晶混合物中时,该化合物可以引起扭转布置,并且可以将自发极化作为当添加到SmC *液晶混合物时作为铁电性质的指标而提高。