Patent application number | Description | Published |
20110297884 | Method of producing trichlorosilane (TCS) rich chlorosilane product stably from a fluidized gas phase reactor (FBR) and the structure of the reactor -II - A fluidized bed reactor (FBR) for producing chlorosilane mixture, which has high contents of tri-chlorosilane (TCS), by hydro chlorination of metallurgical silicon (MGSI) and a method of producing high contents of TCS stably with the FBR is disclosed. A cooling jacket, which surrounds the lower reactor section, combined with inert initial charging material, which does not react with HCl during the reaction at a temperature of above 300° C. and pressure of above 5 bar, controls the extreme exothermal heat of the reaction. In addition to this, combination of an optimized gas distributor and a feeder that can feed the metallurgical silicon with accuracy of ±5% enabled to realize uniform temperature profile within the reaction zone within ±1° C. deviation at 350° C. of average reaction temperature and at 5 bar of reaction pressure. Without the initial charging material, temperature profile within the reaction zone is controlled within ±30° C. | 12-08-2011 |
20120114546 | Hybrid TCS-siemens process equipped with 'turbo charger' FBR; method of saving electricity and equipment cost from TCS-siemens process polysilicon plants of capacity over 10,000 MT/YR - A ‘hybrid’ TCS (Trichlorosilane)-Siemens process is provided to save electricity and initial investment cost from TCS synthesizing process and silicon tetrachloride to TCS converting process in a TCS-Siemens polysilicon plant, whose size is over 10,000 MT/YR of polysilicon. The ‘hybrid’ TCS-Siemens process of the current application is equipped with one direct chlorination FBR (Fluidized Bed Reactor) and one hydro-chlorination FBR. Three different TCS-Siemens processes are compared based on mass balance calculation. The hybrid TCS-Siemens process saves at least 78,000,000Kwhr/year of electricity from TCS generation only from a 10,000 MT/YR polysilicon plant when compared with a ‘Closed Loop TCS-Siemens Process’, which is equipped with only high-pressure, high-temperature operating hydro-chlorination FBRs. | 05-10-2012 |
Patent application number | Description | Published |
20100001236 | Method of producing trichlorosilane (TCS) rich product stably from a fluidized gas phase reactor (FBR) and the structure of the reactor - A fluidized bed reactor (FBR) for producing tri-chlorosilane (TCS) from metallurgical silicon (MGSI) and method of producing TCS stably with the FBR is disclosed. The FBR according to current application is comprised of 1) a straight lower bed section whose height over inner diameter ratio (H/D) is in the range of 3 to 6, 2) an expanded zone that has steep angle lower than 7 degree from the vertical line of the lower bed section, 3) a hemi-sphere top section on a flange for internal cooler, 4) a straight upper section of the reactor, 5) an internal cooler with flange, 6) a gas distribution plate, 7) a feed inlet line that has angle lower than 20 degree from the vertical line of the lower bed section, 8) a cyclone installed upper-outside of the FBR, 9) a recycle line from an outside cyclone that has angle lower than 20 degree from the vertical line of the lower bed section, 10) a seed bed hopper located vertically at the top of the hemi-sphere top section, 11) an outer cooling jacket surrounding the outside of the lower bed section, and 12) a feeder that controls feed rate of MGSI within ±5% accuracy. | 01-07-2010 |
20100264362 | Method of producing trichlorosilane (TCS) rich Chlorosilane product stably from a fluidized gas phase reactor (FBR) and the structure of the reactor - A fluidized bed reactor (FBR) for producing chlorosilane mixture, which has high contents of tri-chlorosilane (TCS), by hydro chlorination of metallurgical silicon (MGSI) and a method of producing high contents of TCS stably with the FBR is disclosed. A cooling jacket, which surrounds the lower reactor section, combined with inert initial charging material, which does not react with HCl during the reaction at a temperature of above 300° C. and pressure of above 5 bar, controls the extreme exothermal heat of the reaction. In addition to this, combination of an optimized gas distributor and a feeder that can feed the metallurgical silicon with accuracy of ±5% enabled to realize uniform temperature profile within the reaction zone within ±1 degree ° C. deviation at 350° C. of average reaction temperature and at 5 bar of reaction pressure. | 10-21-2010 |
20110129402 | Method of producing trichlorosilane (TCS) rich product stably from hydrogenation of silicon tetra chloride (STC) in fluidized gas phase reactor (FBR) and the structure of the reactor - A fluidized bed reactor (FBR) for producing chlorosilane mixture containing trichlorosilane (TCS) concentration at least 50% from hydrogenation of special metallurgical silicon (MGSI), which has manganese concentration less than 35 ppmw, silicon tetra chloride (STC), and the method of producing high TCS content chlorosilane mixture is disclosed. The FBR according to current application has an expanded over head zone, whose inner diameter is at least twice bigger than that of the inner diameter of the lower straight zone. Temperature of the reaction bed is controlled between 300° C. to 600° C. within the mean temperature deviation of ±5 C. Reaction pressure is maintained between 3 to 10 bar. Retention time of the STC and hydrogen in the reaction bed is controlled to be shorter than 30 seconds. The FBR of the current application enables higher STY (space time yield; production rate/volume of the reactor) of TCS compared to any other current commercial STC cold converter, which hydrogenise STC to TCS. | 06-02-2011 |