Abstract:
Reactor design and operating conditions enabling adiabatic direct chlorination of metallurgic silicon by hydrogen chloride are presented. The exothermic heat of reaction is absorbed by cooling fluid in admixture with the reactants and products of the reaction, thereby eliminating the necessity of external cooling for the reactor. Reactor temperature is managed by controlling the temperature and composition of reactor feedstock. Feedstock comprises hydrogen, STC, TCS, HCl, and metallurgic silicon. Exemplary feedstock composition, flow-rates, and temperatures are provided. Alternate means of producing the feedstock are described, including a method whereby the feedstock is the product of an upstream STC converter.
Abstract:
A method includes: (i) combining ingredients to form a reactant, (ii) contacting H 2 with the reactant to form an activated reactant; and (iii) contacting an organohalide with the activated reactant to form a spent reactant and a reaction product including a halosilane. The ingredients used in step (i) are: (a) SiO 2 , (b) a reducing agent, and (c) a silicide precursor. The halosilane produced by the method has formula R n H m SiX (4-n) , where subscript n is 0 to 3, subscript m is 0 to 2, a quantity (n + m) ≤ 3, each R is independently a hydrocarbyl group, and each X is independently a halogen atom.
Abstract:
본 실시예는 폴리실리콘 제조장치에 관한 것으로, 이는 베이스 플레이트; 이 베이스 플레이트 상에 결합되는 용기본체; 베이스 플레이트에 설치된 3 개의 전극과 연결되어 용기본체 내에 배치되는 적어도 하나의 로드; 용기본체 내에 반응가스를 공급하기 위해 용기본체와 연통되는 반응가스원; 및 전극들에 접속되어 로드가 발열하게 하는 교류 전원을 공급하도록 된 전력공급설비를 포함하여서, 전기소모량을 감소시킴과 더불어, 기존에 비해 수율 및 생산성을 대폭 향상시킬 수 있는 효과가 있게 된다.
Abstract:
An apparatus is provided that includes a heating zone, an overhead temperature modulation zone in fluid communication with the heating zone, and an overhead cooling zone in fluid communication with the overhead temperature modulation zone. The heating zone includes a solid reactant support and a reactant gas input, and also includes a heater. The overhead temperature modulation zone includes a temperature regulator for modifying the temperature of the overhead temperature modulation zone. The overhead temperature modulation zone also includes an overhead gas outlet and provides a reflux flow path for condensate to return to the heating zone. The overhead cooling zone has a chiller for cooling the temperature of the overhead cooling zone. The overhead cooling zone provides a barrier to separate condensate formed therein from the overhead temperature modulation zone. The apparatus further includes an apparatus wall that defines an interior chamber of the apparatus between the zones.
Abstract:
An apparatus is provided that includes a heating zone, an overhead temperature modulation zone in fluid communication with the heating zone, and an overhead cooling zone in fluid communication with the overhead temperature modulation zone. The heating zone includes a solid reactant support and a reactant gas input, and also includes a heater. The overhead temperature modulation zone includes a temperature regulator for modifying the temperature of the overhead temperature modulation zone. The overhead temperature modulation zone also includes an overhead gas outlet and provides a reflux flow path for condensate to return to the heating zone. The overhead cooling zone has a chiller for cooling the temperature of the overhead cooling zone. The overhead cooling zone provides a barrier to separate condensate formed therein from the overhead temperature modulation zone. The apparatus further includes an apparatus wall that defines an interior chamber of the apparatus between the zones.
Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung von Monochlorsilan aus der Umsetzung von Monosilan und Dichlorsilan in Gegenwart eines Katalysators. Nach dem erfindungsgemäßen Verfahren wird Monochlorsilan durch Komproportionierung von Monosilan und Dichlorsilan gebildet. Ferner betrifft die Erfindung die Verwendung des hergestellten Monochlorsilans als auch eine Anlage zur Durchführung des Verfahrens.
Abstract:
Shell and tube heat exchangers that include a baffle arrangement that improves the temperature profile and flow pattern throughout the exchanger and/or that are integral with a reaction vessel are disclosed. Methods for using the exchangers including methods that involve use of the exchanger and a reaction vessel to produce a reaction product gas containing trichlorosilane are also disclosed.
Abstract:
A method of making a trihalosilane comprising contacting an organotrihalosilane according to the formula RS1X3 (I), wherein R is C 1 -C 10 hydrocarbyl and each X independently is halo, with hydrogen, wherein the mole ratio of the organotrihalosilane to hydrogen is from 0.009:1 to 1:2300, in the presence of a catalyst comprising a metal selected from (i) Re, (ii) a mixture comprising Re and at least one element selected from Pd, Ru, Mn, Cu, and Rh, (iii) a mixture comprising Ir and at least one element selected from Pd and Rh, (iv) Mn, (v) a mixture comprising Mn and Rh, (vi) Ag, (vii) Mg, and (viii) Rh at from 300 to 800 °C to form a trihalosilane.
Abstract:
The present invention relates to a catalyst used in hydrodechlorination reaction which converts silicon tetrachloride (SiCl4), a byproduct generated when making silicon wafer for solar cells, into trichlorosilane (HSiCl3), and more specifically relates to 1) an active carbon, 2) an active carbon preprocessed with steam and others, 3) a catalyst manufactured by preprocessing with steam and others an active carbon having silicon and chlorine, and 4) a catalyst introduced with one of the metals from nickel, cobalt, copper, calcium, strontium, and barium, after preprocessing with steam and others the active carbon having silicon and chlorine, and a method for manufacturing same. The four types of catalysts of the present invention have trichlorosilane yield of 9-31% with the reaction pressure of 1-5 atmospheric pressure, the reaction temperature of 600-900, and the reaction time of 5-9 hours, when manufacturing trichlorosilane from hydrodechlorination reaction of silicon tetrachloride. The present invention enables significant decrease in the cost of manufacturing polysilicon, which is a material for silicon solar cell, by reusing silicon tetrachloride, which is a main byproduct generated in the manufacturing process of polysilicon for solar cells, and enhances the economic effect by increasing the yield and reducing the energy use even when the reaction temperature and the pressure are low.