| PATENT ASSIGNEE'S COUNTRY | Brazil |
| UPDATE | 01.00 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Process for ethylene polymn at low pressure comprising - Prepg polymn catalyst by (a) Milling analytical grade Mg chloride in ball mill with 10% by wt. of Et benzoate in inert atm at room T, for 48 h, up to suppression of the 2.56 A peak in the X-ray spectrum; (b) Calcining at 600-800C alumi na of 200-500 square.m/g & 1.3-3.5 cubic.cm/g pore vol. for 4-8 h.; (c) Mixing thoroughly the activated alumina of (b) at rates ranging from 15-85% by wt., of the MgCl2 prepd in (a), the mixing being done in ball mill at room T for > 2 h in inert atm.; (d) Impregnating support prepd in (c) with 5-7.5 times by wt. of TiCl4 in inert atm & stirring for 2 h at 80C so as to deposit 1.3-2 % Ti & (e) washing surplus TiCl4 off with n-hexane at 50C - Contacting impregnated & washed support with C2H4, to provide PE which comprises (i) high MW chains having MW > 1000000 in amount 3.5-6.5% & (ii) lower MW chains having MW > 100000 in amount 35-55% Wherein MFI = 0.32-0.1 g/10 min |
| PATENT PHOTOCOPY | Available on request |
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