Detail of "4109-96-0"

Reference

Polymerization of a-olefin using a specified deactivator for a catalyst

Polymerization of a-olefin using a specified deactivator for a catalyst. (Asahi Chemical Industry Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 59071305 A2 23 Apr 1984 Showa, 19 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08F004-00; C08F210-16. APPLICATION: JP 82-180014 15 Oct 1982. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) After the polymn. of ethylene optionally with a C3-18 a-olefin at 3130° by a Ziegler catalyst contg. Mg and Ti in the presence or absence of a solvent, a zeolite is added as a catalyst deactivator in the form of a hydrocarbon suspension, a solid, or a melt, the monomer and/or inert solvent is sepd., and the deactivator or the polymer contg. it is removed. As a hydrocarbon-sol. org. Mg compd., MaMgbBp1Rq2Xr1Xs2 [M = Al, Zn, B, Be or Li; b 3 1, a, p, q, r, and s 3 0; p+q+r+s = ma + 2b, (0 ￡ (r + s)/(a + b) ￡ 1.0; m = valence of M; R1 and R2 = C1-20 hydrocarbyl, X1 and X2 = H, OR3, OSiR4R5R6, NR7R8, or SR9 (R3, R7, R8 and R9 = C1-20 hydrocarbyl, and R4, R5, and R6 = H or C1-20 hydrocarbyl)] is used, with Ti(OR10)n.X4-n (R10 = C1-20 hydrocarbyl; X = halogen; 0 ￡ n ￡ 3) at mol ratio 1:(1.1-4.0) to make a Ti component. For example, to a mixt. of 1.6 L 0.5 M HSiCl3 [97-93-8] hexane soln. and 1.2 L hexane at 70° were charged 0.45 L Al0.15MgBu1.75 (metal concn. 0.9 M) octane soln. and 0.35 L hexane at 70° in 1 h, and the mixt. was treated with 0.7 g TiCl4 in 0.6 L hexane at 70° for 1 h to give a solid component (A). To a 100 L autoclave were continuously supplied 1.0 g/h A, 200 L/h 0.1 mM AlEt3 [4109-96-0] cyclohexane soln., 25 kg/h ethylene, and 1 kg/h H2, and polymn. was carried out at 200° and 80 kg/cm2 to give 20 kg/h polyethylene [9002-88-4] at conversion 80%. The deactivator (e.g. Na2O.Al2O3.2SiO2.xh2O zeolite; 2% slurry in hexane) was supplied at 40 mmol/L to the outgoing polymer from the reactor, the mixt. heated to 250°, the pressure reduced to 1 kg/cm2, and the product fed to the separator to give a polymer slurry from the bottom.

Silicon-nitrogen polymers and ceramics derived from reactions of dichlorosilane, H2SiCl2

Silicon-nitrogen polymers and ceramics derived from reactions of dichlorosilane, H2SiCl2. Seyferth, Dietmar; Wiseman, Gary H.; Prud'homme, Christian (Dep. Chem., Massachusetts Inst. Technol., Cambridge, MA 02139, USA). Mater. Sci. Res., 17(Emergent Process Methods High-Technol. Ceram.), 263-9 (English) 1984. CODEN: MTSRAY. ISSN: 0076-5201. DOCUMENT TYPE: Journal CA Section: 57 (Ceramics) Section cross-reference(s): 38 The products, obtained in the ammonolysis of H2SiCl2 [4109-96-0], were investigated as potential precursors of Si3N4. The reaction proceeds better in polar solvents, e.g., dichloromethane and Et2O, than in benzene soln. The products were polysilazane oils of a compn. that appeared to be more complex than the expected (H2SiNH)x. The oils were very reactive toward moisture. At -30°, under N2, the oils appeared to be stable indefinitely. At room temp., under N2, the viscosity of the oils increased gradually and after 3-5 days a glassy solid formed. Spectroscopic and thermogravimetric analyses of the oils are described. Heating of the oil in a fused SiO2 boat in an inert atm. for 1 h at 200° solidified the sample. Increase of the temp. to 1150° with holding for 5 h gave a brown, cryst. solid contg. a-Si3N4, b-Si3N4, and Si (by x-ray diffraction). Further pyrolysis in a N2 stream at 1150° for 12h gave a brown solid contg. only a trace of Si.