JPS6452894A - Production of improved pulp - Google Patents
Production of improved pulpInfo
- Publication number
- JPS6452894A JPS6452894A JP20935687A JP20935687A JPS6452894A JP S6452894 A JPS6452894 A JP S6452894A JP 20935687 A JP20935687 A JP 20935687A JP 20935687 A JP20935687 A JP 20935687A JP S6452894 A JPS6452894 A JP S6452894A
- Authority
- JP
- Japan
- Prior art keywords
- urea
- formaldehyde
- pulp
- resultant
- keeping
- 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.)
- Pending
Links
Landscapes
- Paper (AREA)
Abstract
PURPOSE: To obtain a pulp having a large specific surface area and no decrease in retention even in high speed papermaking and excellent in whiteness by mixing an aqueous pulp slurry with urea and formaldehyde or the like and an acidic catalyst and keeping the resultant for a specified time without stirring. CONSTITUTION: This pulp is obtained by mixing an aqueous pulp slurry with urea and formaldehyde or an initial condensate of urea and formaldehyde and an acidic catalyst (sulfuric acid or formic acid) and keeping the resultant for >=15 min preferably 20-60 min and reacting substantially without stirring. It is preferable to use 0.8-1.6 mol formaldehyde based on 1 mol urea.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20935687A JPS6452894A (en) | 1987-08-25 | 1987-08-25 | Production of improved pulp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20935687A JPS6452894A (en) | 1987-08-25 | 1987-08-25 | Production of improved pulp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6452894A true JPS6452894A (en) | 1989-02-28 |
Family
ID=16571589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20935687A Pending JPS6452894A (en) | 1987-08-25 | 1987-08-25 | Production of improved pulp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6452894A (en) |
-
1987
- 1987-08-25 JP JP20935687A patent/JPS6452894A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5527830A (en) | Production of alumina carrier | |
MX165575B (en) | RESINS WITH RESISTANCE IN A WET CONDITION | |
MY104005A (en) | Synthesis of n-t-alkyl-1,2-diacylhydrazines. | |
TW260726B (en) | ||
ATE143681T1 (en) | METHOD AND DISPERSANTS FOR THE PRODUCTION OF AQUEOUS CALCIUM CARBONATE SUSPENSIONS WITH HIGH SOLIDS CONTENT | |
SE8802708D0 (en) | PROCEDURE FOR PREPARING AN ACID RESISTANT COATING ON FILLER PARTICLES | |
TW340116B (en) | Process for preparing N-phosphonomethylamino carboxylic acids | |
EP0379111A3 (en) | Process for producing alpha-hydroxycarboxylic acid amide | |
EP0936309A3 (en) | Improved starch retention in paper and board production | |
EP1078884A3 (en) | Manufacturing process for quaternary ammonium tannate, a vegetable coagulating/flocculating agent | |
JPS6452894A (en) | Production of improved pulp | |
WO1987001695A3 (en) | Vanillin production process | |
SE8500810L (en) | HART FRONT TELL NING | |
DE68916290D1 (en) | Process for the production of starch ethers. | |
JPS6452893A (en) | Improved pulp and its production | |
JPS56131658A (en) | Improvement in dispersion of loading material | |
DE69020035D1 (en) | Process for the preparation of methylol hydentoin. | |
ATE53777T1 (en) | HYDRATION OF SULPHONATED CATION EXCHANGE RESINS. | |
DE3161038D1 (en) | Process for preparing high wet-strength paper | |
ATE15877T1 (en) | PROCESS FOR THE PRODUCTION OF DIHYDROXIALUMINUM SODIUM CARBONATE. | |
GB1516062A (en) | Method of condensing and/or polymerising sulphonated lignin containing materials | |
SE8400188D0 (en) | PROCEDURE FOR PAPER Pulp PRODUCTION | |
JPS57122029A (en) | Preparation of formose | |
KR870003178A (en) | Manufacturing method of waterproofing agent | |
JPS57135715A (en) | Preparation of porous modified sepiolite |