Title:
木材パルプ化処理のためのアルカリ液体の部分的自動苛性化
Document Type and Number:
Japanese Patent JP4502507
Kind Code:
B2
Abstract:
A method is provided for the use of borates in the recausticization of alkali-containing liquors such as those produced in the chemical and semi-chemical pulping of wood and in the oxidation and bleaching of wood pulp. Sodium hydroxide is regenerated from sodium carbonate-containing smelts in such pulp processes by autocausticization through the addition of limited amounts of borate. Autocausticization may be carried out at boron to carbonate molar ratios below 2:1 and at sodium to boron molar ratios exceeding 3:1, resulting in high reaction efficiency. Partial autocausticization using borate may also be combined with conventional lime recausticization for the regeneration of sodium hydroxide from sodium carbonate-containing smelts.
Inventors:
Bear, Charles, M
Mac Bloom, Robert, Bee
Trang, Hongfi, N
Mac Bloom, Robert, Bee
Trang, Hongfi, N
Application Number:
JP2000552339A
Publication Date:
July 14, 2010
Filing Date:
May 28, 1999
Export Citation:
Assignee:
U.S. Borax Incorporated
International Classes:
D21C11/00; D21C3/02; D21C11/04
Domestic Patent References:
| JP57161189A | ||||
| JP3019987A | ||||
| JP52042901A | ||||
| JP50064502A | ||||
| JP7126997A | ||||
| JP7316994A | ||||
| JP4342250A | ||||
| JP4263686A |
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Sadafumi Kobori
Yukihiro Ikeda
Hajime Asamura
Sadafumi Kobori
Yukihiro Ikeda