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    • 6. 发明申请
    • METHOD FOR THE PRODUCTION OF POLYMERS
    • 生产聚合物的方法
    • WO2010037652A1
    • 2010-04-08
    • PCT/EP2009/062185
    • 2009-09-21
    • INEOS Europe LimitedCHAMAYOU, Jean-Louis
    • CHAMAYOU, Jean-Louis
    • C08F6/00C08F2/34C08F10/00C08F297/08
    • B01J8/1809B01J2219/00191C08F6/005C08F210/16C08L23/10C08F2/00C08F210/14C08F210/08
    • The present invention relates to methods useful for the production of polymer powder, and in particular to a method for transitioning from a first process for production of a first polymer to a second process for the production of a second polymer during a polymerisation campaign in a polymerisation apparatus, said polymerisation apparatus comprising a reaction vessel and a degassing vessel, in which the respective first and second processes each comprise: (a) bringing a principal olefin and a comonomer into contact with a catalyst under gas phase polymerisation conditions in the reaction vessel to form the respective first or second polymer, wherein said first and second process utilise the same principal olefin but differ in at least one of (i) the comonomer used and (ii) the reaction temperature at which the polymer is produced, and (b) subsequently contacting the respective first or second polymer with a purge gas in the degassing vessel to remove unreacted monomers, characterised in that the method for transitioning comprises changing the flow rate of purge gas in the degassing vessel from a first rate, X 1, used for degassing of the first polymer to a second rate, X 2, used for degassing of the second polymer, the second rate being defined relative to the flow rate, X i, and temperature, T i, used for an earlier polymer produced during the campaign using the same comonomer as the second process, and the reaction temperature, T 2 in the second process, and that a. where T 2 is increased relative to T i, X 2 is at least 1% lower than X i for each 1 °C increase in T2 compared to T i, b. where T 2 is decreased relative to T i, X 2 is at least 1% higher than X 1 for each I °C decrease in T 2 compared to T i, and c. where T 2 is equal to T i, X 2 is at least equal to X 1, preferably equal to X i .
    • 本发明涉及可用于生产聚合物粉末的方法,特别涉及一种从第一聚合物生产的第一种方法过渡到在聚合反应中聚合过程中第二种聚合物生产的第二种方法的方法 装置,所述聚合装置包括反应容器和脱气容器,其中相应的第一和第二工艺各自包含:(a)使主要烯烃和共聚单体在气相聚合条件下与催化剂在反应容器中接触至 形成相应的第一或第二聚合物,其中所述第一和第二方法利用相同的主要烯烃,但在(i)所用共聚单体和(ii)生产聚合物的反应温度中的至少一个中不同,(b) 随后在脱气容器中将相应的第一或第二聚合物与吹扫气体接触以除去未反应的单体,其特征在于 因为转换方法包括将脱气容器中的吹扫气体的流速从用于将第一聚合物脱气到第二速率的第一速率X1,用于第二聚合物的脱气的第二速率,第二速率 相对于在使用与第二过程相同的共聚单体的活动期间产生的较早聚合物的流速,Xi和温度Ti,以及第二过程中的反应温度T2来定义。 其中T2相对于Ti增加,X2与Ti,b相比,T2每升高1℃,至少比Xi低1%。 其中T2相对于Ti而降低,X2相对于Ti而言,对于T1的每1℃的降低,X2比X1高至少1%,c。 其中T2等于Ti,X2至少等于X1,优选等于Xi。
    • 7. 发明申请
    • PROCESS AND APPARATUS FOR THE POLYMERISATION OF OLEFINS
    • 烯烃聚合的方法和装置
    • WO2012084628A1
    • 2012-06-28
    • PCT/EP2011/072701
    • 2011-12-14
    • INEOS COMMERCIAL SERVICES UK LIMITEDBELL, Andrew DavidCHAMAYOU, Jean-LouisRAMSAY, Kevin Peter
    • BELL, Andrew DavidCHAMAYOU, Jean-LouisRAMSAY, Kevin Peter
    • C08F10/00C08F2/34
    • C08F10/00C08F2/34C08F110/02C08F2/007
    • The present invention relates to a process for the gas-phase polymerisation of olefins in a fluidised bed reactor, which process comprises: a) passing a fluidising gas comprising one or more olefin monomers through a fluidised bed of polymer particles in the presence of a polymerisation catalyst. b) withdrawing a first gaseous stream comprising solid particles from the top of the reactor, c) passing the first gaseous stream to a gas/solids separator, separating solid particles therefrom, and forming a second gaseous stream comprising residual solid particles, d) passing at least a portion of the second gaseous stream to one or more heat exchangers to remove the heat of reaction, and e) recycling at least a portion of the cooled stream from step (d) as the fluidising gas in step (a), characterised in that the rate of fouling of the one or more heat exchangers is such that i) the increase in pressure drop across the heat exchangers is equivalent to less than 5% per year, and/or ii) the decrease in heat transfer of the heat exchangers is equivalent to less than 5% per year.
    • 本发明涉及在流化床反应器中烯烃气相聚合的方法,该方法包括:a)在聚合反应存在下使包含一种或多种烯烃单体的流化气体通过聚合物颗粒的流化床 催化剂。 b)从反应器顶部排出包含固体颗粒的第一气流,c)将第一气流送至气/固分离器,从其中分离固体颗粒,形成包含残留固体颗粒的第二气流,d)通过 至少一部分所述第二气流到一个或多个热交换器以去除反应热,以及e)将步骤(d)中的至少一部分冷却流作为步骤(a)中的流化气体再循环,其特征在于 因为一个或多个热交换器的结垢率使得i)热交换器上的压降的增加等于每年小于5%,和/或ii)热量的传热减少 交换机每年相当于不到5%。