会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 45. 发明授权
    • Manufacture of olefin polymers
    • 烯烃聚合物的制造
    • US4048414A
    • 1977-09-13
    • US657863
    • 1976-02-13
    • Hans FrielingsdorfWolfgang GruberHeinz Mueller-Tamm
    • Hans FrielingsdorfWolfgang GruberHeinz Mueller-Tamm
    • C08F4/00C08F4/06C08F10/00C08F4/02C08F4/24
    • C08F10/00
    • A process for the manufacture of olefin polymers by polymerization of monoolefins using a silicic xerogel/chromium trioxide catalyst obtained by (1) synthesizing a particulate silicic xerogel, (2) doping said xerogel with chromium trioxide or a chromium compound capable of converting to chromium trioxide under the conditions of stage (3) and (3) heating the resulting product in a gas stream containing oxygen. The silicic xerogel/chromium trioxide catalyst used is one which has been obtained by (1) synthesizing the silicic xerogel in the first stage by (1.1) starting with a silicic hydrogel having a relatively high solids content, (1.2) extracting water from said hydrogel by means of an alkanol and/or alkanone until the organic liquid absorbs no further water, (1.3) extracting the organic liquid used in stage (1.2) from the resulting dehydrated gel saturated with said organic liquid by means of a hydrocarbon or oxohydrocarbon until said hydrocarbon or oxohydrocarbon absorbs no further organic liquid from stage (1.2), and (1.4) drying the resulting dehydrated gel saturated with hydrocarbon or oxohydrocarbon (xerogel formation), and (2) doping said xerogel in the second stage with the desired amount of chromium from a solution of chromium trioxide in an alkanone or solution of a chromium compound capable of converting to chromium trioxide under the conditions of stage (3) in an alkanol or alkanone with evaporation of the solvent.
    • 一种通过使用(1)合成硅氧烷干燥剂获得的硅干燥剂/三氧化铬催化剂聚合单烯烃的方法,(2)用三氧化铬或能够转化成三氧化铬的铬化合物掺杂干燥剂 在阶段(3)和(3)的条件下,将所得产物加热到含氧的气流中。 所使用的硅干凝胶/三氧化铬催化剂是通过(1)通过(1.1)由具有相对高的固体含量的硅水凝胶合成硅酸凝胶得到的,(1.2)从所述水凝胶中提取水 通过烷醇和/或烷酮直到有机液体不再吸收其他水,(1.3)从所得到的用烃或氧代烃饱和的有机液体的脱水凝胶中提取阶段(1.2)中使用的有机液体,直到所述 碳氢化合物或氧代烃不会从阶段(1.2)吸收进一步的有机液体,和(1.4)干燥所得到的用烃或氧代烃饱和的脱水凝胶(干凝胶形成),和(2)在第二阶段用所需量的铬掺杂所述干凝胶 在三烷基铬溶液中,在烷烃或烷烃或碱的阶段(3)的条件下,可以在烷酮或能够转化成三氧化铬的铬化合物的溶液中, 无溶剂蒸发。
    • 46. 发明授权
    • Manufacture of olefin polymers
    • 烯烃聚合物的制造
    • US4042770A
    • 1977-08-16
    • US631642
    • 1975-11-13
    • Robert BachlHans FrielingsdorfWolfgang GruberHeinz Mueller-TammLeonhard Gonsior
    • Robert BachlHans FrielingsdorfWolfgang GruberHeinz Mueller-TammLeonhard Gonsior
    • C08F4/00C08F4/06C08F10/00C08F4/02C08F4/24
    • C08F10/00Y02P20/52
    • This invention relates to a process for the manufacture of olefin polymers by polymerization of monoolefins with the aid of a silicic xerogel/chromium trioxide catalyst obtained by (1) synthesizing a particulate silicic xerogel, (2) doping this xerogel with chromium trioxide or a chromium compound which converts to chromium trioxide under conditions of stage (3) and (3) maintaining the resulting product at an elevated temperature in a water-free oxygen-containing stream of gas. The characteristic feature of the process of the invention is that the silicic xerogel/chromium trioxide catalyst used is one obtained by (1) synthesizing the silicic xerogel in the first stage as follows: (1.1) taking an aqueous solution of a sodium silicate, (1.2) substituting substantially all of the sodium ions contained in said solution by hydrogen ions by means of an ion exchanger, (1.3) introducing a water-soluble aluminum salt into the resulting aqueous silicic acid solution, (1.4) adjusting the pH of the solution obtained in stage (1.3) to from 0.1 to 3.5, if necessary, (1.5) adjusting the solution obtained in (1.3) or (1.4) to a pH of from 4 to 12 by means of a nitrogen-base compound, (1.6) extracting the product forming the solid phase in stage (1.5) (silicic hydrogel) by means of an alkanol and/or alkanone until the organic liquid absorbs no more water and, finally, (1.7) drying the dehydrated gel saturated with organic liquid resulting from stage (1.6) (xerogel formation). This process makes it possible to obtain polymers having a satisfactory particle size distribution and a favorable melt index.
    • 本发明涉及一种通过使用(1)合成硅氧烷干凝胶得到的硅胶干凝胶/三氧化铬催化剂,通过单烯烃的聚合制备烯烃聚合物的方法,(2)将这种干凝胶与三氧化铬或铬 在阶段(3)和(3)的条件下转化成三氧化铬的化合物在无水的含氧气流中保持所得产物在升高的温度。 本发明方法的特征在于,使用的硅干燥剂/三氧化铬催化剂是通过(1)在第一阶段合成硅干凝胶得到的催化剂如下:(1.1)取硅酸钠水溶液( 1.2)通过离子交换器用氢离子基本上全部取代所述溶液中所含的所有钠离子,(1.3)将水溶性铝盐引入所得水性硅酸溶液中,(1.4)调节溶液的pH (1.3)中得到的化合物为0.1至3.5,如果需要,(1.5)通过氮碱化合物将(1.3)或(1.4)中获得的溶液调节至4至12的pH,(1.6) 通过链烷醇和/或烷酮萃取在阶段(1.5)(硅水凝胶)中形成固相的产物,直到有机液体吸收不再多的水,最后(1.7)干燥由有机液体饱和的脱水凝胶 阶段(1.6)(干凝胶形成)。 该方法可以获得具有令人满意的粒度分布和良好熔融指数的聚合物。