Effects of Process Variables on Poly-Aluminum Chloride (PAC)-Rosin Sizing Performance under Neutral Papermaking Conditions

Hamzeh, Yahya; Ekhtera, Mohammad Hassan; Hubbe, Martin A.; Izadyar, Soheila; Pourtahmasi, Kambiz

doi:10.1021/ie800107x

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…Although our information about different aspects of rosins application in paper mills (premixing rosin sizes, pH adjustment, applied temperatures, water hardness effect, optimum chemical dosages, etc.) has considered many issues (Nitzman and Royapaa 2003;Zou et al 2004a,b;Bajpai 2005;Hubbe 2005Hubbe , 2006Zhijie 2006;Hamzeh et al 2008;Bergvall 2013), the subject of cationic rosin seems to need more attention. Although its application became prevalent by the late 1990s (Ehrhardt and Gast 1988;Nitzman and Royapaa 2003), the scientific and laboratory information about different aspects such as the main mechanism underlying the hydrophobizing effect, its tolerance domain in complex wet end chemistry of recycled mill (high conductivity suspension, highly cationic demand,…), the effect of alum presence, the influence of sequence of alum/rosin addition, and the effect of suspension pH, etc., remain unclear (Daniel and Moore 1956;Watanabe et al 1999;Hubbe 2005).…”

Section: Introductionmentioning

confidence: 99%

Process Variables and the Performance of Cationic Rosin as an Internal Sizing Agent in Recycled Corrugated Container Pulp

2016

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Cationic rosin has many uses in papermaking; however, its performance as an internal sizing agent differs depending on the circumstance, especially in the recycling of pulps. In this study, a comprehensive laboratory approach was used to investigate the process variables affecting the cationic rosin application in the paper recycling process. In this respect, four levels of alum (0.5, 1.0, 1.5, and 2.0%) and four levels of cationic rosin (0.5, 1.0, 1.5, and 2.0%) were considered to find the best alum/cationic rosin combination in acidic conditions (pH 5). After considering all aspects of the paper, such as the mechanical properties (tensile, burst, and tear indices), wet resistance (Cobb test and dynamic contact angle test), and chemical usage (economically and environmentally-friendly procedures), the 1.0% alum and 0.5% cationic rosin levels were selected for optimum performance. This research also showed that the combined effect of alum with cationic rosin was favorable. Moreover, the sequence of alum and cationic rosin addition, which is a challenge in paper mills, also should be considered. The results indicated that the addition of cationic rosin after alum obtained the best mechanical and wet resistance results. In addition, the results showed that both acidic and neutral pH were acceptable in this sizing process.

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Section: Introductionmentioning

confidence: 99%

Process Variables and the Performance of Cationic Rosin as an Internal Sizing Agent in Recycled Corrugated Container Pulp

2016

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“…Although our information about different aspects of rosin application in paper mills (pH adjustment, tolerance assessment, optimum chemical dosages, etc.) has considered many issues (Seppänen et al 2000;Kitaoka et al 2001;Mattsson et al 2002;Hamzeh et al 2008), combining rosin-based sizing agents and AKD seems to need more attention, because of lacking research to try to combine the advantages of AKD and rosin. Some of these areas, such as retention aid dosages, pH adjustment, and tolerance assessment, can provide a proper lead for optimizing the process.…”

Section: Introductionmentioning

confidence: 99%

Process variables and the performance of soybean-oil rosin-based polyester as an internal sizing agent

Chen

Zhao

et al. 2019

BioRes

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Soybean-oil rosin-based polyester (SRP) has many uses in papermaking, but its performance as an internal sizing agent differs depending on the circumstances. In this study, a comprehensive laboratory approach was used to investigate the process variables affecting SRP application. Five levels of SRP (0.5%, 1.0%, 1.5%, 2.0%, and 2.5%), five levels of aluminum sulfate (0.5%, 1.0%, 1.5%, 2.0%, and 2.5%), and five levels of cationic polyacrylamide (0.05%, 0.1%, 0.15%, 0.2%, and 0.25%) were considered to determine the best process variables within a pH range of 5.0 to 9.0. Aspects that were considered included the mechanical properties (tensile, burst, and tear indices), water resistance (Cobb test, dynamic c9197ontact angle test, and scanning electron microscopy), and chemical usage (economical and environmentally friendly procedures). The optimum conditions based on these factors were 1.0% SRP, 1.0% aluminum sulfate, and 0.15% cationic polyacrylamide levels at a pH of 7.0. The results showed that in the optimal sizing system, 15% calcium carbonate can be tolerated.

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“…Rosin, a natural resin isolated mainly from exudates of pine trees, is an abundant and renewable resource in the world . The rosin or modified rosin is an extremely important chemical raw material that widely used in many fields such as in paint, coatings, insulation materials, medicine, papermaking, and rubber . The softening point of rosin is a key quality parameter to evaluate whether the material can be used to produce the products with the desired quality or performance, e.g., the lower the softening point, the worse its quality .…”

Section: Introductionmentioning

confidence: 99%

Determination of the softening point of rosin by a simple and automated headspace gas chromatographic technique

Dai

Zhan

et al. 2018

J of Separation Science

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We report a simple and automated headspace gas chromatographic technique for the determination of the softening point of rosin. A lumpy solid of rosin is added into a headspace vial, then an automated stepwise temperature ramping and headspace sampling was performed at each temperature stage and gas chromatography measurement. By plotting the gas chromatography signal for an impurity in rosin versus the temperature, a transition point (corresponding to the rosin softening point) was determined. The results show that the present method has a good precision (<0.76%), and good accuracy (the relative differences compared to the ring and ball method was <4.0%). The present method is simple, accurate, and automated. It is practical and suitable for testing the softening of rosin and derivatives in mills.

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Effects of Process Variables on Poly-Aluminum Chloride (PAC)-Rosin Sizing Performance under Neutral Papermaking Conditions

Cited by 6 publications

References 7 publications

Process Variables and the Performance of Cationic Rosin as an Internal Sizing Agent in Recycled Corrugated Container Pulp

Process Variables and the Performance of Cationic Rosin as an Internal Sizing Agent in Recycled Corrugated Container Pulp

Process variables and the performance of soybean-oil rosin-based polyester as an internal sizing agent

Determination of the softening point of rosin by a simple and automated headspace gas chromatographic technique

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