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| 1 | APPLICATION OF MODIFIED POLYACYLAMIDE IN TREATMENT OF PAPERMAKING DEINKING WASTEWATER显示文摘In this paper, the application of modified polyacylamide is discussed and the complex systems of PAC/modified PAM are used to treat the papermaking wastewater. The results showed that when cationic polyacylamide (CPAM) and amphoteric polyacylamide (AmPAM) were used at the dosage of 0.75ppm with PAC, of which the optimum dosage was 100ppm, the removed rate of CODcr was above 80% . | FushanChen HongjieZhang HuirenHu LijuanQin | 2004 | 天津科技大学学报2004，19，A02： | 1 |
| 2 | PREPARATION AND APPLICATION OF COPOLYMERS OF 2-ACRYLAMIDO-2-METHYL PROPANE SULFO ACID AS WASTE WATER TREATMENT AGENTS显示文摘In this paper, the preparation and application of copolymers of 2-acrylamido-2-methyl propane sulfo acid (AMPS) were discussed. The results showed that the copolymers with molecular weight 18.10 million can be prepared. In treating waste water from deinked pulp, the dosage of copolymers was 0.75ppm, the optimum dosage of PAC was 100ppm; dosage of the amphoteric polyacylamide (AmPAM) with molecular weight 11.34 million was 0.75ppm, the optimum dosage of PAC was 75ppm. The removed rate of CODcr was above 70%. | FushanChen HongjieZhang HuirenHu QiushiHe | 2004 | 天津科技大学学报2004，19，A02： | 0 |
| 3 | PEROXYACID ENHANCED OXYGEN DELIGNIFICATION OF KRAFT PULP显示文摘Effect of peroxyacid (a mixture of peroxymonosulfuric acid and peroxyacetic acid) pretreatment on oxygen delignification of kraft pulp from eucalyptus was studied, and the conditions of pretreatment (e.g. DTPA charge, peroxyacid charge, pretreatment time, pretreatment temperature and pH value) were optimized. The results show that peroxyacid pretreatment prior to oxygen delignification could enhance oxygen delignification of kraft pulp, and result in selective delignification and increased delignified-pulp brightness. The optimum conditions of peroxyacid pretreatment were as follows: peroxyacid charge 3% (on peroxymonosulfuric acid), 60℃, 30min, 12% pulp consistency, pH5.0. Pretreatment with 0.5%DTPA was essential before peroxyacid pretreatment. Under the optimum conditions, the degree of delignification and brightness of final pulp were increased by 12.4% (from 44.9% to 57.3%) and 4.9%(ISO, from 54.0% to 58.9%) respectively while maintaining a similar viscosity of final pulps compared to single oxygen delignification. | JianZhao XuezhiLi ShulanShi HuirenHu | 2004 | 天津科技大学学报2004，19，A01： | 0 |
| 4 | STUDY ON THE RETENTION MECHANISMS OF HIGH MOLECULAR WEIGHT CATIONIC POLYACRYLAMIDE显示文摘Cationic polyacrylamide (CPAM), used as a retention and drainage aid in paper industry, has received much attention. As the white water system becomes more closed and the anionic trash in the furnish is accumulated, the anionic trash catcher (ATC) is often applied to neutralize the anionic trash. In this paper, we applied colloid titration and Zeta potential analysis to measure the charge and Zeta potential of paper furnish under the conditions of only adding CPAM and adding both CPAM and polyaluminum chloride (PAC). The underlying mechanism was studied. | HuirenHu HongjieZhang FushanChen | 2004 | 天津科技大学学报2004，19，A01： | 0 |
| 5 | STDUY ON RETENTION AND DRAINAGE PROPERTIES OF THE HIGH SUBSTITUTED DEGREE CATIONIC STARCH显示文摘This paper deals with the retention and drainage properties of the high substituted degree cationic starch (HCS) prepared by half-dry process. The experiments show that HCS has remarkable effects on filler retention and drainage in papermaking industry. With the degree of substitution (DS) of HCS increasing, the effects on filler retention and drainage increase. When the DS of HCS is 0.509 and the dosage is 0.08%, the freeness decreases about 12oSR and the filler retention is 79.82%. | QijieChen FushanChen GaoshengWang HuirenHu | 2004 | 天津科技大学学报2004，19，A01： | 0 |
| 6 | THE CHARACTERISTICS OF HIGH MOLECULAR WEIGHT CATIONIC POLYACRYLAMIDE显示文摘In this paper, the cationic polyacrylamide(CPAM) with high molecular weight was prepared in aqueous solution through a complex initiator system. The CPAM was characterized by Fourier transform infrared spectroscopy (FTIR) and 13C nuclear magnetic resonance spectroscopy (13C NMR), and the charge density of the CPAM was determined by colloid titration. The results obtained indicated that the copolymerization technology used in the experiment was successful. | HongjieZhang HuirenHu FushanChen | 2004 | 天津科技大学学报2004，19，A01： | 0 |
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