Olefines polymerizing tech. of load type non penta metallic catalyst
A non-metallocene and olefin polymerization technology, which is applied in the field of catalyst loading and organic polymerization, can solve the problems of requiring a microwave device and is not easy to operate, and achieves the effect of high melting point
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Embodiment 1
[0124] 1.1 Preparation of supported catalyst
[0125] 1.1.1 Activation of the carrier
[0126] Take ES-70 type silica gel (product of Crosfield Company) and roast it under nitrogen atmosphere. The calcination conditions are: heating rate 5°C / Min, constant temperature at 200°C for 0.5h, constant temperature at 400°C for 0.5h, then constant temperature at 600°C for 4h, and finally natural cooling under nitrogen atmosphere. Recorded as ES-70-600 carrier.
[0127] 1.1.2 Chemical treatment of the carrier
[0128] Under an anhydrous and oxygen-free nitrogen atmosphere (the content of water and oxygen are both lower than 5ppm), take 2.0413g of ES-70-600 carrier, add 20ml of toluene solvent and stir to form a suspension. Take 2ml of a toluene solution of methylaluminoxane (MAO) (abbreviated as original MAO, MAO accounted for 15wt%, product of Witco Company), and slowly add it dropwise to the suspension at 25°C under stirring. Stirring was continued for 2h. Then take titanium tetr...
Embodiment 2
[0138] 2.1 Preparation of catalyst
[0139]The preparation process of the catalyst is similar to Example 1.1. Take 2.048g of ES-70-600 carrier and add 20ml of toluene solvent. Slowly add 2ml of MAO toluene solution dropwise (the original MAO and toluene solvent are diluted 1:9, abbreviated as dilute MAO), and then slowly drop 10ml TiCl 4 hexane solution (titanium content is 0.41mol / L), then washed, filtered, dried and sucked dry.
[0140] Weigh 224 mg of the non-metallocene olefin polymerization catalyst and dissolve it in 40 ml of toluene solvent, then add it into the carrier powder, and stir for 12 h. Finally washed, filtered, dried and drained.
[0141] The titanium content of the supported non-metallocene olefin polymerization catalyst was 2.4%.
[0142] 2.2 Aggregation
[0143] 48.7mg of supported catalyst, 4ml of original MAO and 250ml of hexane solvent were simultaneously added into a 0.5L autoclave, and ethylene polymerization was carried out at an ethylene pressur...
Embodiment 3
[0154] The preparation of the catalyst is similar to that in Example 1.1. Take 2.008g of ES-70-600 carrier and add 20ml of toluene solvent. Slowly add 10ml TiCl dropwise 4 hexane solution (titanium content is 0.41mol / L), then washed, filtered, dried and sucked dry. Weigh 191.4 mg of non-metallocene olefin polymerization catalyst and dissolve it in 35 ml of toluene, add it into the carrier powder, and stir for 12 h. Finally washed, filtered, dried and drained.
[0155] The titanium content of the supported non-metallocene olefin polymerization catalyst was 2.57%.
[0156] The polymerization process was carried out similarly to Example 1.2. 54.1mg of supported catalyst, 4ml of original MAO and 250ml of hexane solvent were simultaneously added into a 0.5L autoclave, and ethylene polymerization was carried out at a ethylene pressure of 1.04MPa, a stirring speed of 560rpm, and a constant temperature of 50°C. The reaction time is 2h.
[0157] Yield: 13.45 g, polyethylene meltin...
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