Silicon production-process evaluations. Quarterly technical progress report (IV), February 1, 1982-April 30, 1982

Technical Report · Sat May 01 04:00:00 EDT 1982

DOI:https://doi.org/10.2172/5289154· OSTI ID:5289154

For the HSC process (Hemlock Semiconductor Corporation), chemical engineering analysis of the process for producing silicon from dichlorosilane in a 1000 MT/yr plant is nearing completion. Progress and status for the major process engineering activities involved in the analysis are reported: base case conditions, reaction chemistry, process flow diagram, material balance, energy balance, property data, equipment design, major equipment list and labor. Engineering design of the third distillation column (D-03, DCS column) in the process was accomplished. The initial design is based on a 94.35% recovery of the light key (DCS, dichlorosilane) in the distillate and a 99.9% recovery of the heavy key (TCS, trichlorosilane) in the bottoms. The specified separation of DCS and TCS is achieved at a reflux ratio of 15 with 20 trays (equilibrium stages). Additional specifications and results are reported including equipment size, temperatures and pressure. Specific raw material requirements necessary to produce the silicon in the process are presented. The primary raw materials include metallurgical grade silicon, silicon tetrachloride, hydrogen, copper (catalyst) and lime (waste treatment). Hydrogen chloride is produced as a by-product in the silicon deposition. Cost analysis of the HSC process was initiated. The costs for raw materials and utilities necessary to produce silicon in HSC process are reported. Raw material costs are $2.66 (1980 dollars) and $3.07 (1982 dollars) per kg of silicon. Utility costs are $4.75 (1980 dollars) and $5.69 (1982 dollars) per kg of silicon.

• Research Organization: Texas Research and Engineering Inst., Inc., Port Neches (USA)
• DOE Contract Number: NAS-7-100-956045
• OSTI ID: 5289154
• Report Number(s): DOE/JPL/956045-82/4; ON: DE82014193
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COPPER
COST
DESIGN
DIAGRAMS
DISTILLATION EQUIPMENT
ECONOMIC ANALYSIS
ECONOMICS
ELEMENTS
ENERGY BALANCE
EQUIPMENT
FLOWSHEETS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN
MATERIAL BALANCE
MATERIALS
METALS
NONMETALS
OXYGEN COMPOUNDS
PRODUCTION
PUBLIC UTILITIES
SEMIMETALS
SILICON
SILICON CHLORIDES
SILICON COMPOUNDS
SPECIFICATIONS
TRANSITION ELEMENTS