Vinyl acetate preparation
    1.
    发明授权
    Vinyl acetate preparation 失效
    乙酸乙烯酯制备

    公开(公告)号:US4158737A

    公开(公告)日:1979-06-19

    申请号:US921391

    申请日:1978-07-03

    摘要: A Group VIII noble metal catalyst supported on an alumina carrier having an alumina content greater than 99.0%, a crystalline alpha-alumina content of greater than 96%, a theta-alumina content of less than about 3.0%, a total calcium and magnesium content of less than 750 ppm, a surface area of about 2 to 6 m.sup.2 /g, an average crush strength of from about 20 to 45 lbs., a bulk density of less than about 1.35 g/cc, and an acetic acid loading of less than about 1.5% in 200 hours. The catalyst generally contains an alkali metal carboxylate activator and optionally a metal such as gold, copper, and the like. The catalyst is particularly useful for the preparation of unsaturated organic esters such as vinyl acetate and allyl acetate by a vapor phase process wherein a gaseous mixture of an olefinic compound, a lower carboxylic acid, and oxygen is contacted with the catalyst.

    摘要翻译: 负载在氧化铝载体上的第VIII族贵金属催化剂,其氧化铝含量大于99.0%,结晶α-氧化铝含量大于96%,θ-氧化铝含量小于约3.0%,总钙和镁含量 小于750ppm,表面积为约2至6m 2 / g,平均抗挤强度为约20至45磅,堆积密度小于约1.35克/立方厘米,乙酸加载量较小 在200小时内约为1.5%。 催化剂通常含有碱金属羧酸盐活化剂和任选的金属如金,铜等。 催化剂特别可用于通过气相法制备不饱和有机酯如乙酸乙烯酯和乙酸烯丙酯,其中烯属化合物,低级羧酸和氧的气体混合物与催化剂接触。

    Printing on a polyolefin substrate
    2.
    发明授权
    Printing on a polyolefin substrate 失效
    在聚烯烃基材上印刷

    公开(公告)号:US4073992A

    公开(公告)日:1978-02-14

    申请号:US524176

    申请日:1974-11-15

    IPC分类号: B41M1/12 B41M1/30 B41M5/26

    摘要: A method is provided for forming an adherent image, such as a design, print, or decoration, on a substrate by applying a fusible pigmented polyolefin powder in a selected pattern to a hot surface of a polyolefin substrate, and fusing the particles of the powder to each other and to the surface to form the image on cooling.

    摘要翻译: 提供了一种通过将选定图案中的可熔性着色的聚烯烃粉末涂覆在聚烯烃基材的热表面上,在基材上形成粘合图像(例如设计,印刷或装饰)的方法,并将粉末颗粒 彼此和表面形成冷却图像。

    Vinyl acetate catalyst
    3.
    发明授权
    Vinyl acetate catalyst 失效
    乙酸乙烯酯催化剂

    公开(公告)号:US4119567A

    公开(公告)日:1978-10-10

    申请号:US750491

    申请日:1976-12-14

    摘要: A Group VIII novel metal catalyst supported on an alumina carrier having an alumina content greater than 99.0%, a crystalline alpha-alumina content of greater than 96%, a theta-alumina content of less than about 3.0%, a total calcium and magnesium content of less than 750 ppm, a surface area of about 2 to 6 m.sup.2 /g, an average crush strength of from about 20 to 45 lbs., a bulk density of less than about 1.35 g/cc, and an acetic acid loading of less than about 1.5% in 200 hours. The catalyst generally contains an alkali metal carboxylate activator and optionally a metal such as gold, copper, and the like. The catalyst is particularly useful for the preparation of unsaturated organic esters such as vinyl acetate and allyl acetate by a vapor phase process wherein a gaseous mixture of an olefinic compound, a lower carboxylic acid, and oxygen is contacted with the catalyst.

    摘要翻译: 负载在氧化铝载体上的第VIII族新型金属催化剂,其氧化铝含量大于99.0%,结晶α-氧化铝含量大于96%,θ-氧化铝含量小于约3.0%,总钙和镁含量 小于750ppm,表面积为约2至6m 2 / g,平均抗挤强度为约20至45磅,堆积密度小于约1.35克/立方厘米,乙酸加载量较小 在200小时内约为1.5%。 催化剂通常含有碱金属羧酸盐活化剂和任选的金属如金,铜等。 催化剂特别可用于通过气相法制备不饱和有机酯如乙酸乙烯酯和乙酸烯丙酯,其中烯属化合物,低级羧酸和氧的气体混合物与催化剂接触。