Comparison of cooking technologies for production of softwood kraftliner pulp

TAPPI Journal ◽  
2014 ◽  
Vol 13 (3) ◽  
pp. 9-15
Author(s):  
STEFAN ANTONSSON ◽  
ANDERS HJORT

Kraftliner, used as the top and bottom layers in corrugated board, is one of the major paper products in the United States and worldwide and is a long-term growth business area for the pulp and paper industry. However, for many years pulping development for kraftliner has been limited. The lack of development may be because corrugated board standards in many countries have specified basis weight and not strength demands on the corrugated board. With the modifications of Item 222/Rule 41, the situation in the United States has changed. Recently, a new cooking technology has been developed enabling defibration of softwood pulps at considerably higher kappa number with low reject content. Pulp quality as a function of kappa number has been evaluated for this new cooking technology compared to pulp produced using a conventional kraftliner cooking technology. Lower H-factor demands and increased strength, measured as tensile energy absorption, were the most important differences found between the two cooking systems in this study.

2020 ◽  
Vol 13 (8) ◽  
pp. 2243-2261 ◽  
Author(s):  
W. J. Sagues ◽  
H. Jameel ◽  
D. L. Sanchez ◽  
S. Park

The pulp and paper industry is a suitable candidate to lead the deployment of BECCS in the US.


1988 ◽  
Vol 20 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Rebecca W. Hanmer

The pulp, paper, and paperboard industry in the United States is the larqest industrial user of water with half of the facilities discharging wastewater directly to our Nation's waters. The major pollutants of concern have historically been the conventional pollutants: biochemical oxygen demand (BOD5), total suspended solids (TSS), and pH. Biological treatment systems are currently employed to reduce these pollutants. Sludges generated by these treatment systems have been categorized as nonhazardous and are generally landfilled. Under the Clean Water Act, the Environmental Protection Agency (EPA) has promulgated all the reguired regulations for this industry. The national regulations are applied to individual pulp and paper mills through permits issued by EPA Regional or State staff. Permit limits can be written that are more restrictive than the national regulations to protect local water guality. In its current projects concerning the pulp and paper industry, EPA is focusing on the reduction of toxic pollutants. The Agency is conducting a joint EPA/industry program to study dioxin discharges at bleached kraft mills. The Agency will also undertake a comprehensive review of the pulp and paper regulations in 1988.


2017 ◽  
Vol 47 (6) ◽  
pp. 735-742 ◽  
Author(s):  
Jean-Thomas Bernard ◽  
Jakir Hussain

We analyze the total factor productivity (TFP) of the pulp and paper industry in three Canadian provinces (British Columbia, Ontario, and Quebec) and in three United States (US) states that are contiguously located south of the border (Washington, Illinois, and Maine) over the period of 1971 to 2005. We find that the industry in the three Canadian provinces had much higher TFP growth rates in the era following the Free-Trade Agreement (FTA) signed in 1988. In terms of productivity level, this relative TFP surge allowed the industry in Ontario and British Columbia to move ahead of Illinois and Washington, respectively; however, Quebec trailed further Maine, which is the overall leader in the sample. Our results in this particular case reveal that the Canadian pulp and paper industry did not contribute to the overall Canada–US productivity gap.


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