Title:
【発明の名称】レーヨンの製造におけるガス流からの汚染物の除去
Document Type and Number:
Japanese Patent JP3501465
Kind Code:
B2
Abstract:
Sulfurous gas streams comprising hydrogen sulfide and carbon disulfide, such as produced as a by-product of the rayon-forming process, are processed to recover the components in a useable form. The gas stream first is contacted with an aqueous sodium hydroxide to dissolve out hydrogen sulfide and some of the carbon disulfide. The dissolved carbon disulfide is driven off from the solution and condensed as a liquid concentrate. Carbon disulfide remaining the gas stream is recovered, such as by condensation. The aqueous sodium sulfide solution which remains from removal of carbon disulfide is concentrated and the pH is adjusted, as necessary, to a value at which the sodium sulfide is predominantly in the form of sodium bisulfide. The concentrated sodium bisulfide solution is capable of reuse in the rayon-forming process along with the liquid concentrate of carbon disulfide.
Inventors:
Spink, Edward F.
Mueller, Christopher Earl.
Mueller, Christopher Earl.
Application Number:
JP54974298A
Publication Date:
March 02, 2004
Filing Date:
May 21, 1998
Export Citation:
Assignee:
Turbo Tack Technologies, Inc.
International Classes:
B01D53/34; B01D53/48; B01D53/52; B01D53/77; C01B17/22; C01B31/26; D01F13/00; D01F13/02; (IPC1-7): B01D53/52; B01D53/48; B01D53/77; D01F13/00
Domestic Patent References:
| JP4326374B1 | ||||
| JP3119007Y1 |
Attorney, Agent or Firm:
Nobuyuki Kaneda (2 others)