Reference

Catalyst and method for polymerizing

Catalyst and method for polymerizing .alpha.-olefins. Sandis, Stylianos; Bailly, Jean Claude (Naphtachimie S. A., Fr.). Ger. Offen. DE 2703911 11 Aug 1977, 23 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C08F010-00. PRIORITY: FR 76-2898 3 Feb 1976. DOCUMENT TYPE: Patent CA Section: 35 (Synthetic High Polymers) TiCl4 was reduced with an Al compd. in the presence of diisoamyl ether (I) [544-01-4] or Bu2O [142-96-1] to prep. TiCl3-contg. catalysts which were used with Al compds. to prep. isotactic polypropylene (I) [25085-53-4] and polyethylene [9002-88-4]. Thus, 380 g TiCl4 in 120 mL heptane was treated slowly at 35.degree. with a mixt. of 93.4 g I, 30 g Et2AlCl [96-10-6], and 180 mL heptane, and the ppt. was stirred for 1 h at 35.degree. and 2 h at 65.degree., washed with heptane, and used (0.8 mg-atom Ti) with 16 mmoles Et2AlCl in heptane for the polymn. of propylene at 65.degree./7 atms., giving 630 g I during 5 h.

Solid titanium trichloride

Solid titanium trichloride. Kakogawa, Genjiro; Suzuki, Tetsumi; Hasuo, Masayoshi; Suga, Yoshinori (Mitsubishi Chemical Industries Co., Ltd., Japan). Japan. Kokai JP 52069892 10 Jun 1977 Showa, 7 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C01G023-02. APPLICATION: JP 75-146147 8 Dec 1975. DOCUMENT TYPE: Patent CA Section: 35 (Synthetic High Polymers) TiCl4 was reduced with Et2AlCl [96-10-6] in the presence of diisoamyl ether (I) [544-01-4] or diisohexyl ether [64192-92-3] to give TiCl3, activated with di-Bu ether [142-96-1], di-Et ether [60-29-7], di-Pr ether [111-43-3], or I, and used as a catalyst to prep. isotactic polypropylene [25085-53-4]. Thus, 2.8 mL Et2AlCl was added to 75 mL toluene contg. 5 mL TiCl4 and 9.3 mL I at 30.degree. under Ar during 5 min, heated at 30.degree. for 30 min, 50.degree. for 60 min, and 90.degree. for 60 min, mixed with 5.9 g Bu2O at 30.degree., and stirred for 2 h to prep. 7.1 g purple solid catalyst.