Methods of trichlorosilane synthesis for polycrystalline …
tented a process in which hydrochlorination is carried out at 400–525 °C and ~35 MPa in the presence of copper, nickel or their compounds [11]. Depending on process temperature, pressure, H 2: SiCl 4 molar ratio, contact du-ration and silicon powder coarseness, the authors could achieve a trichlorosilane yield of 14 to 38 mol.%.
Trichlorosilane (TCS) Plant
Trichlorosilane is an important raw material for the production of polysilicon and it's also used in the synthesis of organosilanes, alkyl, aryl and organochlorosilanes and it is the most basic monomer in organosilane coupling agents. Trichlorosilane is produced by using silicon powder and hydrogen chloride gas via a fluidized bed type reactor.
Trichlorosilane — Advanced Material Solutions
Trichlorosilane (TCS) is considered the foundation molecule for the semiconductor industry. It is the raw material that becomes silicon for silicon wafers, which most integrated circuits are built upon. In addition, it is the raw material to produce dichlorosilane (DCS), monochlorosilane (MCS) and silane.
Siemens Process 3
3. TCS synthesis process and main equipment The fluidized bed reactor is generally used for TCS synthesis reactor. See Fig. 2 for its process flow. The chlorinator is a …
Silicon for photovoltaic applications
In Summer 2005, Joint Solar Silicon started up a pilot plant for the production of silicon at Degussa's site in Rheinfelden, Germany. The main advantage of this process is that the energy consumption of the decomposition of silane to silicon powder in comparison to all other deposition processes is very low. Download : …
Methods of trichlorosilane synthesis for …
Novel technical solutions and ideas for increasing the yield of solar and semiconductor grade polycrystalline silicon processes have been analyzed. The … See more
Trichlorosilane (TCS) Plant
Trichlorosilane is produced by using silicon powder and hydrogen chloride gas via a fluidized bed type reactor. It consumes a large amount of chlorine and hydrogen gas in …
Fluidized Bed Reactors for Solar-Grade Silicon and Silane …
Trichlorosilane is used in the silicon refining industry in the production of high purity silicon via the conventional Siemens process ... The reactor was filled with 862 g of 32 mesh silicon powder to a height of 18 in. Mixtures of hydrogen and liquid SiCl 4 were fed into the reactor. At the exit, the reaction mixture was condensed to produce ...
Preparation process of trichlorosilane | Semantic Scholar
Two preparation processes of trichlorosilane for producing polysilicon are described including process flow,process characteristics and structure of core equipment.The raw materials of improved Siemens process are silica powder and hydrogen chloride,which has wide material sources and low cost.The raw materials of hydrochlorination process …
Use of the active-phase Cu3Si alloy as superior catalyst to …
At present, solar silicon is mostly produced by the Siemens process [19]. This process involves hydrochlorination of silicon without using any catalyst to prepare trichlorosilane (TCS) at 350 °C, and the preparation process can be expressed by the following Eq (1) : (1) Si ( s ) + HCl ( g ) → 350 C ∘ SiHCl 3 ( g ) + SiCl 4 ( g ) + SiH 2 Cl ...
Siemens Process 3
3. TCS synthesis process and main equipment The fluidized bed reactor is generally used for TCS synthesis reactor. See Fig. 2 for its process flow. The chlorinator is a fluidized bed reactor. Metallurgical grade Si powder is fed to the middle of the reactor. HCl gas and some recycled gas from the hydrogen
Methods of trichlorosilane synthesis for polycrystalline silicon
Novel technical solutions and ideas for increasing the yield of solar and semiconductor grade polycrystalline silicon processes have been analyzed. The predominant polycrystalline silicon technology is currently still the Siemens process including the conversion of technical grade silicon (synthesized by carbon-thermal reduction of …
Silicon Production
In the direct chlorination process, TCS is produced from MG Si and anhydrous hydrogen chloride (HCl) according to the exothermic reaction: MG Si + 3HCl→ SiHCl 3 + H 2, at about 350 °C and about 5 bar (g). MG silicon at > 98% purity is fluidized with HCl in a specially designed FBR. The yield of TCS is over 85%.
Distillation assisted heat pump in a trichlorosilane purification process
Abstract. The objective of this paper is to design and optimize a trichlorosilane distillation system with the aim of obtaining this product with a purity higher than 0.99999 mole fraction, so that it can employed as a source of solar-grade silicon. A conventional process with at least two columns is capable of separating the …
About-Anyang Zhong Yu Jin Ming Silicon Industry Co., Ltd.
Anyang Zhong Yu Jin Ming Silicon Industry Co., Ltd. is a large scale silicon metal powder processing company with integrated advantages of technical equipment, inspection and talented staff. We supply premium 553, 441, 421, 411, 3303 silicon metal powder for the production of polysilicon, trichlorosilane, metallurgy, refractory, etc.
The production and main use of silicon metal powder
The main uses of silicon metal powder: silicon metal powder is widely used in refractories, powder metallurgy industry, in order to improve the high temperature, abrasion and oxidation resistance. Its products are widely used in steel-making furnaces, kilns, kiln furniture. In organic silicon chemical industry, metal powder is the basic raw ...
Fluidized Bed Process with Silane 4
process and converts a batch process into a more economical continuous process. The spherical granular silicon product fromfluidized-bed reactors is preferred to the polysilicon rods produced by the Siemens process for down-stream processing. Production of silicon byfluidized beds has been carried on
Effect of Boundary Layers on Polycrystalline Silicon Chemical …
FLUID FLOW AND TRANSPORT PHENOMENA Chinese Journal of Chemical Engineering, 19(1) 1ü9 (2011) Effect of Boundary Layers on Polycrystalline Silicon Chemical Vapor Deposition in a Trichlorosilane and Hydrogen System * ZHANG Pan (ᕖᬶ) 1, WANG Weiwen (⧠Օᮽ) 2, CHENG Guanghui (䱾ݿ䖿) 2 and LI …
Development of fluidized bed reactors for silicon production
The suggested method was leaching silicon powder in hydrofluoric acid and before World War 2 this was the only method available. ... Reactors which utilize trichlorosilane as their reactant gas operates their ... The process of producing silane for this process is therefore often more complicated and makes use of more advanced …
Production of polycrystalline silicon from silane pyrolysis: …
1. Introduction. Polycrystalline silicon is the basic raw material in electronic and solar photovoltaic power generation industries. With the rapid development of the electronic industry, especially under the great foreground of photovoltaic (PV) industry, polysilicon manufacturing industry has increases with every year 15–30% (Tejero …
Silicon tetrachloride hydrogenation method (2017) | Xia …
Silicon tetrachloride hydrogenation method. Xia Gaoqiang, Liu Jianhai, Liu Xingping, Zheng Baogang +1 more. 14 Feb 2017 -. TL;DR: In this paper, the authors proposed a silicon tetrachloride hydrogenation method, which does not need a complex reactor and can increase the yield of the existing trichlorosilane and the one-way …
Purification of Organosilicon Waste Silicon Powder with …
allurgical removal of impurities from the waste silicon powder. To remove the organic residue of waste silicon powder, the waste silicon powder was initially treated under argon gas ambiance at 600 C for 2 h. Then, the high-temperature heat-treated materials, including single acid leaching, mixed acid leaching, and metal-assisted …
Siemens Process | SpringerLink
Metal-grade silicon as the raw material reacts with hydrogen chloride to produce trichlorosilane (TCS); after distillation and purification, trichlorosilane deposits …
Silicon Production
The chemical processes for producing high-purity polysilicon are detailed, including the two large-volume production processes for synthesis of trichlorosilane …
Design and Control of Pressure-Swing Heat Integration …
Design and Control of Pressure-Swing Heat Integration Distillation for the Trichlorosilane Purification Process. ... the equipment calculation formula references to a study by Douglas, 39 and the utility price references to a study by Turton et al ... trichlorosilane and silicon-tetrachloride. J. Chem. Thermodyn. 2015, 91, 420–426. …
CN101966993B
The invention discloses an equipment for producing trichlorosilane by comprehensively utilizing waste silicon powder. The equipment comprises a trichlorosilane synthetic furnace mixed gas outlet pipe connected with a high-efficiency cyclone separator; wherein a material discharge port of the high-efficiency cyclone separator is connected with a …
CN102745691A
A method for recovering waste silicon powder from the trichlorosilane synthetic furnace comprises the synthetic furnace and a silicon powder collection tank, and includes steps: A, replacing the synthetic furnace after the synthetic furnace stops normally; B, after replacement is qualified, connecting a silicon powder discharging valve at the bottom of …
Processes | Free Full-Text | Conversion of Carbonaceous …
The primary process used to obtain polysilicon is the Siemens process [5,6,7,8,9], which is used by more than 80% of polysilicon manufacturers worldwide. It mainly involves the hydrochlorination of industrial silicon to trichlorosilane (SiHCl 3) and SiHCl 3 distillation, followed by the hydrogen reduction of the SiHCl 3 to polysilicon.
Catalytic conversion of silicon tetrachloride to trichlorosilane …
Hydrogenation of silicon tetrachloride (SiCl 4) to trichlorosilane (SiHCl 3) using carbon-based catalysts is studied.The results show that surface functional groups that result from the defect sites of the carbon catalysts play an important role in producing SiHCl 3.Because the metal−carbon composites obtained by treating sucrose and transition …
Trichlorosilane | HSiCl3 | CID 24811
All silicon chlorides are immediately and completely hydrolyzed by water (1) and trichlorosilane has been reported to hydrolyze in water, releasing hydrochloric acid (2). Trichlorosilane is expected to volatilize from dry …