最高温度

Dealcoholization temperature markedly influences the surface area and porosity of the resultant MAO-supports. When the support was pretreated at lower or higher temperature, the corresponding MAO-support shows very low surface area;2.XRD and IR analyses indicate that MAO has reacted with the residual ethanol in the supports, which is an important manner to get MAO fixed on the carrier. Morever, XPS analyse indicates that MAO can also be coordinated with MgCl_2, which is another way to get MAO fixed on the support;3.ICP and EDX analyses indicate that dealcoholization temperature not only determined the element content on the solid catalyst, but also influences the element distribution on the carrier;4.The activities of the supported phenoxy-imine catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature. The support (MSP-5) obtained by treating MgCl_2·2.56C_2H_5OH at 160℃for 4 h, then modified by MAO is very effective for immobilizing complex 3, the resultant solid catalyst (MSPC-5) shows very high activity in ethylene polymerization, and its kinetics of polymerization is stable during the reaction process. Finally, PEs with spherical morphology and high bulk density (over 0.35g/ml) were obtained, without reactor fouling;5.In this work, polymerization conditions such as alkylaluminums, Al/Zr ratio, temperature and H_2 had a pronounced effect on the activity of MSPC-5 and properties of PE;(3). New MgCl_2-Supported Single-Site Catalysts for Ethylene PolymerizationIn this work, a kind of new MgCl_2 support was obtained by anhydrous MgCl_2 co-milled with solid MAO, and it is a creative contribution. Then some single-site catalysts were supported on the new MgCl_2 support, and the resulted solid catalysts were tested in ethylene polymerization, the results indicated that:1.XRD and IR analyses indicate that MAO does be coordinated with MgCl_2, which is in good agreement with the results obtained by XPS;2.co-mlling time had no obvious effect on the texture of support after 12 hours;3.In this work, MgCl_2 was co-milled with solid MAO for different hours, and then complex 3 was supported on these co-milled supports. It was found that co-milling time markedly influences the activity of solid catalysts, but it had negligible effect on the kinetic profile and the properties of resultant PE.

XPS研究结果表明，MAO不仅仅只和乙醇作用，MAO还与MgCl_2本身有一定的作用，这是一个极为重要的发现；3、通过ICP和EDX表征，发现载体的脱醇温度直接影响着元素在固体催化剂中的含量及分布；4、脱醇温度极大地影响着负载苯氧基亚胺类催化剂的活性和聚合物的性能，特别是原始载体经160℃活化4小时制备得到的固体催化剂MSPC-5的活性明显高于其他脱醇温度条件下制得的固体催化，并且催化剂寿命长，表现出稳定的动力学行为，最终获得了高堆密度(大于0.35g／ml)的球形聚乙烯颗粒；5、本文选择MSPC-5为研究对象，考察了聚合反应参数对催化剂的活性及其聚合物的影响，研究发现：不同的烷基铝对催化剂具有非常重要的影响，特别足TIBA对MSPC-5的助催化活性最高，烷基铝的加入量有一个较佳值，聚合温度为80度时活性最高，H_2的加入使催化剂的活性明显降低且聚合物的分子量也减小；、新型氯化镁载体负载单活性中心催化剂催化乙烯聚合本文创造性采用固体MAO与无水氯化镁直接进行共研磨，制备出了一种的新型的氯化镁载体，并将该载体用于多种单活性中心催化剂的负载化研究，研究表明：1、通过BET、XRD的表征，再次证实了MAO与MgCl_2之间具有直接作用，与XPS的研究结果相一致；2、当研磨时间高于12小时时，延长研磨时间对载体的结构没有显著的影响；3、将配合物3负载于共研磨时间不同的一系列载体上，乙烯聚合结果表明，尽管共研磨时间对负载催化剂的活性具有明显的影响，但是它对聚合物的性能以及催化剂的影响不明显。

Dealcoholization temperature markedly influences the surface area and porosity of the resultant MAO-supports. When the support was pretreated at lower or higher temperature, the corresponding MAO-support shows very low surface area; 2.XRD and IR analyses indicate that MAO has reacted with the residual ethanol in the supports, which is an important manner to get MAO fixed on the carrier. Morever, XPS analyse indicates that MAO can also be coordinated with MgCl_2, which is another way to get MAO fixed on the support; 3.ICP and EDX analyses indicate that dealcoholization temperature not only determined the element content on the solid catalyst, but also influences the element distribution on the carrier; 4.The activities of the supported phenoxy-imine catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature. The support (MSP-5) obtained by treating MgCl_2·2.56C_2H_5OH at 160℃for 4 h, then modified by MAO is very effective for immobilizing complex 3, the resultant solid catalyst (MSPC-5) shows very high activity in ethylene polymerization, and its kinetics of polymerization is stable during the reaction process. Finally, PEs with spherical morphology and high bulk density (over 0.35g/ml) were obtained, without reactor fouling; 5.In this work, polymerization conditions such as alkylaluminums, Al/Zr ratio, temperature and H_2 had a pronounced effect on the activity of MSPC-5 and properties of PE;(3). New MgCl_2-Supported Single-Site Catalysts for Ethylene Polymerization In this work, a kind of new MgCl_2 support was obtained by anhydrous MgCl_2 co-milled with solid MAO, and it is a creative contribution. Then some single-site catalysts were supported on the new MgCl_2 support, and the resulted solid catalysts were tested in ethylene polymerization, the results indicated that: 1.XRD and IR analyses indicate that MAO does be coordinated with MgCl_2, which is in good agreement with the results obtained by XPS; 2.co-mlling time had no obvious effect on the texture of support after 12 hours; 3.In this work, MgCl_2 was co-milled with solid MAO for different hours, and then complex 3 was supported on these co-milled supports. It was found that co-milling time markedly influences the activity of solid catalysts, but it had negligible effect on the kinetic profile and the properties of resultant PE.

XPS研究结果表明，MAO不仅仅只和乙醇作用，MAO还与MgCl_2本身有一定的作用，这是一个极为重要的发现； 3、通过ICP和EDX表征，发现载体的脱醇温度直接影响着元素在固体催化剂中的含量及分布； 4、脱醇温度极大地影响着负载苯氧基亚胺类催化剂的活性和聚合物的性能，特别是原始载体经160℃活化4小时制备得到的固体催化剂MSPC-5的活性明显高于其他脱醇温度条件下制得的固体催化，并且催化剂寿命长，表现出稳定的动力学行为，最终获得了高堆密度(大于0.35g／ml)的球形聚乙烯颗粒； 5、本文选择MSPC-5为研究对象，考察了聚合反应参数对催化剂的活性及其聚合物的影响，研究发现：不同的烷基铝对催化剂具有非常重要的影响，特别足TIBA对MSPC-5的助催化活性最高，烷基铝的加入量有一个较佳值，聚合温度为80度时活性最高，H_2的加入使催化剂的活性明显降低且聚合物的分子量也减小；、新型氯化镁载体负载单活性中心催化剂催化乙烯聚合本文创造性采用固体MAO与无水氯化镁直接进行共研磨，制备出了一种的新型的氯化镁载体，并将该载体用于多种单活性中心催化剂的负载化研究，研究表明： 1、通过BET、XRD的表征，再次证实了MAO与MgCl_2之间具有直接作用，与XPS的研究结果相一致； 2、当研磨时间高于12小时时，延长研磨时间对载体的结构没有显著的影响； 3、将配合物3负载于共研磨时间不同的一系列载体上，乙烯聚合结果表明，尽管共研磨时间对负载催化剂的活性具有明显的影响，但是它对聚合物的性能以及催化剂的影响不明显。

Type of guide Shape Cage Material Specifications Type using standard material Roller Spherical outer ring Yes Iron-based, stainless steel Iron-based Standard grease Standard lubrication method Standard grease nipples Oil hole Oil hole position Albania No.2 can be replaced with Albania S2 Grease Lubrication None Yes Inner ring General dust prevention measures Minimum service temperature Centigrade Minimum service temperature Fahrenheit Min...

导轨型号形状保持器材质规格标准材质规格滚子球面外圈有不锈钢钢铁系列标准润滑脂标准润滑方式标准加脂油嘴油孔一般防尘措施无脂润滑无无无最低使用温度摄氏最低使用温度华氏最高使用温度摄氏最高使用温度华氏可否变更为对应高温的型号-15 5 80 176 可配用滚子尺寸总滚子数 3.00*9.50L 11 个。。。

Type of guide Shape Cage Material Specifications Type using standard material Roller Spherical outer ring None Iron-based, stainless steel Iron-based Standard grease Standard lubrication method Standard grease nipples Oil hole Oil hole position Albania No.2 can be replaced with Albania S2 Grease Lubrication None Yes Inner ring General dust prevention measures Minimum service temperature Centigrade Minimum service temperature Fahrenheit Mi...

导轨型号形状保持器材质规格标准材质规格滚子球面外圈无不锈钢钢铁系列标准润滑脂标准润滑方式标准加脂油嘴油孔油孔位置 Albania S2可替代Albania No.2 脂润滑无有内环一般防尘措施最低使用温度摄氏最低使用温度华氏最高使用温度摄氏最高使用温度华氏 UU -15 5 80 176 可否变更为对应高温的型号滚子尺寸总滚子数。。。

Type of guide Shape Cage Material Specifications Type using standard material Roller Spherical outer ring None Iron-based, stainless steel Iron-based Standard grease Standard lubrication method Standard grease nipples Oil hole Oil hole position Albania No.2 can be replaced with Albania S2 Grease Lubrication None Yes Inner ring General dust prevention measures Minimum service temperature Centigrade Minimum service temperature Fahrenheit Mi...

导轨型号形状保持器材质规格标准材质规格滚子球面外圈有不锈钢钢铁系列标准润滑脂标准润滑方式标准加脂油嘴油孔油孔位置 Albania S2可替代Albania No.2 脂润滑无有内环一般防尘措施最低使用温度摄氏最低使用温度华氏最高使用温度摄氏最高使用温度华氏 UU -15 5 80 176 可否变更为对应高温的型号滚子尺寸总滚子数。。。

Type of guide Shape Cage Material Specifications Type using standard material Roller Cylindrical outer ring Yes Iron-based, stainless steel Iron-based Standard grease Standard lubrication method Standard grease nipples Oil hole Oil hole position Albania No.2 can be replaced with Albania S2 Grease Lubrication None Yes Inner ring General dust prevention measures Minimum service temperature Centigrade Minimum service temperature Fahrenheit M...

导轨型号形状保持器材质规格标准材质规格滚子球面外圈有不锈钢钢铁系列标准润滑脂标准润滑方式标准加脂油嘴油孔油孔位置 Albania S2可替代Albania No.2 脂润滑无有内环一般防尘措施最低使用温度摄氏最低使用温度华氏最高使用温度摄氏最高使用温度华氏 UU -15 5 80 176 可否变更为对应高温的型号滚子尺寸总滚子数。。。

Type of guide Shape Cage Material Specifications Type using standard material Roller Cylindrical outer ring Yes Iron-based, stainless steel Iron-based Standard grease Standard lubrication method Standard grease nipples Oil hole Oil hole position Albania No.2 can be replaced with Albania S2 Grease Lubrication None Yes Inner ring General dust prevention measures Minimum service temperature Centigrade Minimum service temperature Fahrenheit M...

导轨型号形状保持器材质规格标准材质规格滚子球面外圈有不锈钢钢铁系列标准润滑脂标准润滑方式标准加脂油嘴油孔一般防尘措施无脂润滑无无无最低使用温度摄氏最低使用温度华氏最高使用温度摄氏最高使用温度华氏可否变更为对应高温的型号-15 5 80 176 可配用滚子尺寸总滚子数 3.50*11.80L 13 个。。。

And 95% relative humidity. The normal test condition for acceptance will be 35oC and 85% R.H.

周围实际环境最高温度达40oC，相关湿度为95%时，冰箱为了运转将与环境完全匹配。

It is shown that the pre-extracting reaction should be terminated as Log reached 3.2 to 3.4, and the maximum temperature should not be higher than 160℃. Smaller Log result in lower dissolving rates of saccharides.

结果表明，为了获取最大量的糖、减少F和HMF的生成量，H因子的对数值应控制在3.2—3.4的范围内；同时发现，在获得相同最大量糖的前提下，热水预抽提的最高温度不应超过160℃。

Again, the maximum temperature can exceed 30 °C (86 °F) in summer.

再次，最高温度可超过30 ℃（ 86 °F ）在夏季。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。