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    Heat-sealable polyolefin films and processes for their preparation
    1.
    发明授权
    Heat-sealable polyolefin films and processes for their preparation 失效
    可热封聚烯烃薄膜及其制备方法

    公开(公告)号：US4421780A

    公开(公告)日：1983-12-20

    申请号：US331361

    申请日：1981-12-16

    申请人： Pierpaolo Buzio ,  Lucio Edefonti ,  Gianluigi Argela'

    发明人： Pierpaolo Buzio ,  Lucio Edefonti ,  Gianluigi Argela'

    IPC分类号： B05D7/00 ,  B05D7/04 ,  C08J7/04 ,  B05D3/00

    CPC分类号： B05D7/532 ,  B05D7/04 ,  C08J7/047 ,  C08J2323/02 ,  C08J2479/08 ,  Y10T428/31862 ,  Y10T428/31873 ,  Y10T428/31938

    摘要： Heat-sealable films are described which are constituted by a polyolefin film, particularly polypropylene, having on one surface thereof a layer of primer, applied in aqueous or aqueous-alcoholic solution, and chosen from: polyethylenimines, products of the condensation of urea or melamine with formaldehyde, particularly the etherified compounds; alkoxyalkyl melamine polyhydroxylates; or mixtures of the said compounds; and, on the other surface thereof, a layer of the said primer or one similar to the first, followed by a layer of vinyl, vinylidene or acrylic polymer or copolymer.The process for the production of these films includes the surface treatment of the polyolefin film by means of an electric discharge, flame or chemical agents, followed by the application of both surfaces, by means of an aqueous or aqueous-alcoholic solution, of a layer of primer chosen from: polyethylenimines, products of the condensation of urea or melamine with formaldehyde, particularly the etherified compounds; alkoxyalkyl melamine polyhydroxylates; or mixtures of the said compounds; and finally followed by the application, to one of the surfaces thus treated, of a layer of vinyl, vinylidene or acrylic polymer or copolymer. The heat-sealable films thus obtained have improved characteristics, particularly with regard to their printability, dimensional stability and residual solvent content both in the film per se, and when printed, and are particularly suitable for use in flow packing.

    摘要翻译： 描述了由聚烯烃薄膜特别是聚丙烯构成的可热封薄膜，该聚烯烃薄膜的一个表面上具有涂覆在水溶液或含水醇溶液中的底层，并选自：聚乙烯亚胺，尿素或三聚氰胺缩合的产物 与甲醛，特别是醚化化合物; 烷氧基烷基三聚氰胺多羟基甲酸酯; 或所述化合物的混合物; 并且在其另一个表面上具有一层所述底漆或类似于第一层的底层，随后是一层乙烯基，亚乙烯基或丙烯酸聚合物或共聚物。 制造这些膜的方法包括通过放电，火焰或化学试剂对聚烯烃膜进行表面处理，然后通过水溶液或含水醇溶液施加两层表面的层 选自：聚乙烯亚胺，尿素或三聚氰胺与甲醛缩合的产物，特别是醚化化合物; 烷氧基烷基三聚氰胺多羟基甲酸酯; 或所述化合物的混合物; 并且最后应用到如此处理的一个表面上的一层乙烯基，亚乙烯基或丙烯酸类聚合物或共聚物。 由此获得的可热封膜具有改进的特性，特别是关于它们的可印刷性，尺寸稳定性和膜本身以及印刷时的残留溶剂含量，并且特别适用于流动包装。

    Process for the purification of ethylene oxide
    6.
    发明授权
    Process for the purification of ethylene oxide 失效
    环氧乙烷纯化方法

    公开(公告)号：US4033617A

    公开(公告)日：1977-07-05

    申请号：US703342

    申请日：1976-07-08

    申请人： Gioacchino Cocuzza ,  Gianni Torreggiani ,  Michele Sfregola

    发明人： Gioacchino Cocuzza ,  Gianni Torreggiani ,  Michele Sfregola

    IPC分类号： C07D301/32 ,  B01D3/14 ,  C07D303/04

    CPC分类号： C07D301/32

    摘要： Crude ethylene oxide present in the dilute aqueous solution resulting from the extraction with an aqueous solvent of ethylene oxide from the gaseous stream obtained by catalytic oxidation of ethylene is purified by desorption, liquefaction, distillation in a fractionating column and final desorption treatment to remove absorbed non-condensable gases. The fractionating column is heated by condensation of the water vapor evolved during desorption and a liquid stream of ethylene oxide rich in acetaldehyde is discharged from the bottom, treated to convert a fraction of said acetaldehyde into high-boiling products, distilled to remove the latter as bottoms and returned to the fractionating column.

    摘要翻译： 通过由乙烯的催化氧化获得的气流中的环氧乙烷的水性溶剂萃取而得到的稀水溶液中存在的稀水溶液中的粗环氧乙烷通过解吸，液化，分馏塔中的蒸馏和最终解吸附处理来净化， 可冷凝气体。 分馏柱通过在解吸过程中放出的水蒸气的冷凝而被加热，并且从底部排出富含乙醛的环氧乙烷的液体流，经处理以将所述乙醛的一部分转化为高沸点产物，蒸馏除去后者作为 底部并返回分馏塔。

    Catalyst for the oxidation of methanol to formaldehyde and process for preparing the same
    8.
    发明授权
    Catalyst for the oxidation of methanol to formaldehyde and process for preparing the same 失效
    用于将甲醇氧化成甲醛的催化剂及其制备方法

    公开(公告)号：US4024074A

    公开(公告)日：1977-05-17

    申请号：US664199

    申请日：1976-03-05

    申请人： Luciano Cairati ,  Ferruccio Trifiro' ,  Pierluigi Villa

    发明人： Luciano Cairati ,  Ferruccio Trifiro' ,  Pierluigi Villa

    IPC分类号： C07C47/052 ,  B01J23/88 ,  B01J23/887 ,  B01J37/03 ,  C07B61/00 ,  C07C45/00 ,  C07C45/38 ,  C07C67/00

    CPC分类号： B01J37/03 ,  B01J23/8876 ,  C07C45/38 ,  B01J2523/00

    摘要： A catalyst active and selective in the oxidation of methanol to formaldehyde is prepared by mixing an aqueous molybdate solution with an aqueous solution of a ferric salt, while maintaining a Mo/Fe atomic ratio of from 1.6:1 to 2.2:1 in the mixture, heating the resulting suspension at 70.degree.-100.degree. C for at least 30 minutes, washing the resulting precipitate with water, drying said precipitate to reduce its water content to 2-8% by weight, reducing the dried precipitate to granules and drying the latter to completely remove water, impregnating the dried granules with an aqueous solution of a decomposable bismuth salt and drying and calcining the impregnated granules. The catalyst consists of granules of crystalline iron molybdate and molybdenum trioxide having on their surface an interaction product thereof with bismuth oxide, said molybdenum trioxide and said bismuth being present in an amount of 5-35 wt.% and 0.5-10 wt.%, respectively, with respect to the crystalline iron molybdate.

    摘要翻译： 通过将钼酸水溶液与铁盐水溶液混合，同时保持混合物中的Mo / Fe原子比为1.6:1至2.2:1，制备了将甲醇氧化成甲醛的活性和选择性的催化剂， 将所得悬浮液在70℃-100℃加热至少30分钟，用水洗涤所得沉淀物，干燥所述沉淀物以将其水含量降低至2-8重量％，将干燥的沉淀物还原成颗粒并干燥后者 完全除去水，用可分解的铋盐水溶液浸渍干燥的颗粒，并干燥并煅烧浸渍的颗粒。 催化剂由结晶钼酸钼和三氧化钼的颗粒组成，其表面上与氧化铋的相互作用产物，所述三氧化钼和所述铋以5-35重量％和0.5-10重量％的量存在， 分别相对于结晶的钼酸铁。