Title:
【発明の名称】乾燥前駆物質の処理方法
Document Type and Number:
Japanese Patent JP2534402
Kind Code:
B2
Abstract:
PCT No. PCT/AU89/00500 Sec. 371 Date Jul. 18, 1991 Sec. 102(e) Date Jul. 18, 1991 PCT Filed Nov. 17, 1989 PCT Pub. No. WO90/05984 PCT Pub. Date May 31, 1990.A container (13) is arranged to be filled with a dry precursor material and the top of the container is welded shut. The container (13) has a generally cylindrical shape with at least a partially corrugated side wall (23). The top of the container (27) has a filling port (21) and a plug (22) adapted to fit therein. A cylindrical liner (24) fits snugly within the container (13) and extends between an inlet and outlet filter (25) and (26) located at the bottom (20) and top (27) of the container, respectively. At the center of the top of the container (27), a gas outlet (28) is provided, the gas outlet (28) in the form of a vertical extending pipe which passes through the plug (22) and terminates in a transverse perforated pipe (29) at its lower end. The perforated pipe (29) is separated from the dry precursor material within the container (13) by the outlet filter (26). At the bottom of the container (20), a gas inlet (30) is provided in one side wall of the container. Inside the container (13) the pipe (30) extends horizontally parallel to the bottom of the container (20). It is also perforated and is separated from the dry precursor material by the inlet filter (25). The container (13) is heated in either a batch or continuous process while a reducing gas such as hydrogen or nitrogen is introduced at the gas inlet (30). This gas passes from the perforated pipe (31) and eventually passes through the outlet pipe (28). The container (13) is heated for a time sufficient to ensure that substantially all the nitrates within the dry precursor material have been decomposed and removed.
Inventors:
RAMU ERITSUKU JON
Application Number:
JP50000789A
Publication Date:
September 18, 1996
Filing Date:
November 17, 1989
Export Citation:
Assignee:
OOSUTOREIRIAN NYUUKURIA SAIENSU ANDO TEKUNOROJII OOGANIZEISHON
International Classes:
G21F9/16; G21F9/30; G21F9/36; (IPC1-7): G21F9/16; G21F9/30
Attorney, Agent or Firm:
Fujiya Shiga (1 person outside)