Silane, methyltrichloro

HN03 nitric acid 7697-37-2 3.910E 09 24.860 4149 SiCH3CI3 silane, methyltrichloro 75-79-6 8.090E+09 61.680... 

Synonyms Methylsilicochloroform Methyl silicon trichloride Methylsilyl trichloride Silane, methyltrichloro- Silane, trichloromethyl-... 

Silane, methylphenyl-. See Phenylmethylsilane Silane, methyltricetoxy-. See Methyltriacetoxysilane Silane, methyltrichloro-. See Methyltrichlorosilane Silane, octadecyltriethoxy-. See n-Octadecyltriethoxysilane Silane, octadecyltrimethoxy-. See n-Octadecyltrimethoxysilane Silane, octyl-. See Octyls lane Silane, oxybis (trimethyl-. See Hexamethyidisiloxane Silane, phenyl-. See Phenylsilane Silane, phenyidimethyl-. See Phenyidimethylsilane... 

The first rectification stage. From collector 10 the mixture of methyl-chlorosilanes is periodically fed into pressure container 11, from where at 50-65 °C it is sent through heater 12 (by self-flow) onto the feeding plate of rectification tower 13. From the tower the tank liquid (methyltrichloro-silane, dimethyldichlorosilane and tank residue) flows into tank 14, where the temperature of 80-90 °C is maintained, and from there is continously poured into collector 22. After the tower, vapours of the head fraction at a temperature below 58 °C, consisting of the rest of methylchloride, di- and trichlorosilane, dimethylchlorosilane, methyldichlorosilane and the azeotropic mixture of silicon tetrachloride and trimethylchlorosilane are sent into refluxer 15, cooled with water, and into refluxer 16, cooled with salt solution (-15 °C). After that, through cooler 17 the condensate is gathered in receptacle 19. Volatile products, which did not condense in reflux-ers 15 and 16, are sent into condenser 18 cooled with Freon (-50 °C). There they condense and also flow into receptacle 19. As soon as it is accumulated, the condensate is sent from receptacle 19 into collector 20. 

Salinger (44) reported the successful conversion of methyltrichloro-silanes to silicon carbide in a 50-kW RF plasma torch. The liquid methyltrichlorosilanes were fed to the tail flame of various plasmas and the solid products were recovered in an acid-resistant bag filter. Up to 85% recovery of theoretical solid product was reported, which was subsequently heated at 500°C to remove elemental carbon. Under the best condition (20-25% vol. hydrogen in argon plasma at 36 kW), up to 70%o conversion to j3-SiC was obtained with ca. 10% conversion to amorphous SiC. Salinger suggested that the good crystallinity of the )3-SiC so obtained meant that the reaction occurred in a gas temperature range in which )3-SiC was the stable crystalline form (i.e., < 2300°C). 

Relative retention volumes and retention indices have been reported399 for silicon tetrachloride, methyltrichloro- and dimethyldichloro-silane, phosphorus trichloride and phosphorus oxychloride at 50 °C on stationary phases containing vaseline oil, poly-siloxane liquids VKZh-94, PFMS-2 and DS-701, fluorosilicone oil 169, dinonyl phthalate and dibutyl phthalate. The retention index for phosphorus oxychloride increased with increase in the polarity of the stationary phase that for silicon tetrachloride remained practically constant. 

Fig. 58, Gas chromatogram of methylvinyl-dichlorosilane, 68° 90°C distillation cut. Column 10 3 kieselguhr nitrobenzene at 25°C, Carrier gas, nitrogen, 50ml/min. (1) Hydrogen chloride (2) Methyl-dichlorosilane (3) Methyltrichloro-silane (4) Dimethyldichlorosilane (5) Dimethy1vinyl-chlorosilane (6) Vinyltrichlorosilane (7) Unknown ...

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