ES2003174A6 - Decreasing viscosity and enhancing evapn. of black liquors - Google Patents
Decreasing viscosity and enhancing evapn. of black liquorsInfo
- Publication number
- ES2003174A6 ES2003174A6 ES8603204A ES8603204A ES2003174A6 ES 2003174 A6 ES2003174 A6 ES 2003174A6 ES 8603204 A ES8603204 A ES 8603204A ES 8603204 A ES8603204 A ES 8603204A ES 2003174 A6 ES2003174 A6 ES 2003174A6
- Authority
- ES
- Spain
- Prior art keywords
- temp
- evapn
- raised
- enhancing
- decreasing viscosity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000003247 decreasing effect Effects 0.000 title 1
- 230000002708 enhancing effect Effects 0.000 title 1
- 238000010411 cooking Methods 0.000 abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract 1
- 239000005864 Sulphur Substances 0.000 abstract 1
- 229920002678 cellulose Polymers 0.000 abstract 1
- 239000001913 cellulose Substances 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000005485 electric heating Methods 0.000 abstract 1
- 229920005610 lignin Polymers 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 229920001021 polysulfide Polymers 0.000 abstract 1
- 229910021653 sulphate ion Inorganic materials 0.000 abstract 1
Landscapes
- Paper (AREA)
Abstract
Temp. of sulphate black liquor (I) from a cellulose cook is raised above its cooking temp. to split the macromolecular lignin fraction in (I). - Pref. temp. of (I) is raised to 170-190 deg.C for 1-5 mins. and a polysulphide or sulphur redn. agent is added to (I) to intensify splitting. Temp. can be raised immediately after the cook, in the cooking process circulation loop or just before final evapn. Temp. can be raised by direct or indirect steam or electric heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES8603204A ES2003174A6 (en) | 1986-11-27 | 1986-11-27 | Decreasing viscosity and enhancing evapn. of black liquors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES8603204A ES2003174A6 (en) | 1986-11-27 | 1986-11-27 | Decreasing viscosity and enhancing evapn. of black liquors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2003174A6 true ES2003174A6 (en) | 1988-10-16 |
Family
ID=8248806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES8603204A Expired ES2003174A6 (en) | 1986-11-27 | 1986-11-27 | Decreasing viscosity and enhancing evapn. of black liquors |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES2003174A6 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2187318A1 (en) * | 2000-04-07 | 2003-06-01 | Univ Huelva | High solids black lye viscosity reduction additive consists of e.g. formamide applied to Kraft process pulp paste prior to inputting into the recuperation vessel |
-
1986
- 1986-11-27 ES ES8603204A patent/ES2003174A6/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2187318A1 (en) * | 2000-04-07 | 2003-06-01 | Univ Huelva | High solids black lye viscosity reduction additive consists of e.g. formamide applied to Kraft process pulp paste prior to inputting into the recuperation vessel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| SA6 | Expiration date (snapshot 920101) |
Free format text: 2006-11-27 |