| http://www.w3.org/ns/prov#value | - In addition to the washing steps indicated in the above processes (1) to (6), the intermediate products in any of the above contact steps may be washed with a hydrocarbon compound which is liquid at normal temperatures.Based on the above description, a particularly preferable process for preparing the solid catalyst component (A) comprises suspending the dialkoxy magnesium (a) in the aromatic hydr
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