Title:
硫酸溶液の硫酸濃度を増加させる方法
Document Type and Number:
Japanese Patent JP2013545705
Kind Code:
A
Abstract:
Described is a method of increasing the sulfuric acid concentration of a first aqueous sulfuric acid solution with a sulfuric acid concentration of 82-89% to a concentrated sulfuric acid solution with a sulfuric acid concentration of at least 90%, including evaporating water from the first aqueous sulfuric acid solution in an evaporator vessel to the concentrated sulfuric acid solution, pumping around a mixture of the first aqueous sulfuric acid solution, part of the concentrated sulfuric acid solution, a second aqueous sulfuric acid solution, and hydrogen peroxide through an enameled piping system comprising the evaporator vessel and one or more heaters and pumps, wherein the piping system is operating at a temperature of at least 180° C., and the sulfuric acid concentration of the second aqueous sulfuric acid solution is at least 90%.
Inventors:
Kuhorst, Hendricks, Johannes
Bourg, Toinis Reindelt
Bourg, Toinis Reindelt
Application Number:
JP2013539186A
Publication Date:
December 26, 2013
Filing Date:
October 26, 2011
Export Citation:
Assignee:
Teijin Aramid B.V.
International Classes:
C01B17/88; B01J19/02
Domestic Patent References:
| JPH11314906A | 1999-11-16 | |||
| JP2011500988A | 2011-01-06 | |||
| JPS5645703A | 1981-04-25 | |||
| JPS5645808A | 1981-04-25 | |||
| JPH11314906A | 1999-11-16 | |||
| JP2011500988A | 2011-01-06 | |||
| JPS5645703A | 1981-04-25 | |||
| JPS5645808A | 1981-04-25 |
Foreign References:
| WO2009053254A2 | 2009-04-30 | |||
| US4274910A | 1981-06-23 | |||
| US5075097A | 1991-12-24 | |||
| WO2009053254A2 | 2009-04-30 | |||
| US4274910A | 1981-06-23 | |||
| US5075097A | 1991-12-24 |
Attorney, Agent or Firm:
Taro Tameyama