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In 2006 CELCO/ARAUCO had five pulp mills in Chile and one in Argentina. Apart from pulp mills, CELCO/ARAUCO has 4 engineered wood manufacturing plants in Chile, 2 in Argentina and 2 in Brazil. The company was founded in September 1979 as result of the fusion of Celulosa Arauco S.A. (1967) and Celulosa Constitución S.A. (1969).
The kraft process (also known as kraft pulping or sulfate process) is a process for conversion of wood into wood pulp, which consists of almost pure cellulose fibres, the main component of paper. The kraft process involves treatment of wood chips with a hot mixture of water, sodium hydroxide (NaOH), and sodium sulfide (Na 2 S), known as white ...
Argentina is the fourth largest producer of paper, paperboard and corrugated fiberboard in Latin America. As of the 2004, the sector produced about 1.4 million tons. The production experienced an increase of 11 percent compared to 2003. However, this production only satisfied 67 percent of domestic demand.
Uruguay allowed UPM to increase production at Fray Bentos mill from 1.1 million tonnes a year to 1.3 million tonnes in 2013. Argentina threatened to take Uruguay to the International Court of Justice, despite having lost its earlier case. [82] Uruguay Senator Lucia Topolansky denied that there were plans to construct a new plant at the site. [83]
Cellulose is the most abundant organic polymer on Earth. [6] The cellulose content of cotton fibre is 90%, that of wood is 40–50%, and that of dried hemp is approximately 57%. [7] [8] [9] Cellulose is mainly used to produce paperboard and paper. Smaller quantities are converted into a wide variety of derivative products such as cellophane and ...
Chemical pulping involves dissolving lignin in order to extract the cellulose from the wood fiber. The different processes of chemical pulping include the Kraft process, which uses caustic soda and sodium sulfide and is the most common; alternatively, the use of sulfurous acid is known as the sulfite process, the neutral sulfite semichemical is treated as a third process separate from sulfite ...
In the manufacturing process, pulp is introduced into a paper machine where it is shaped into a paper web and water is extracted through pressing and drying stages. Pressing involves removing water from the sheet by applying force. This process employs a specialized type of felt, distinct from traditional felt, to absorb the water.
This, along with the ability of the kraft process to accept a wider variety of types of wood and to produce stronger fibres, [13] made the kraft process the dominant pulping process, starting in the 1940s. [2] Global production of wood pulp in 2006 was 175 million tons (160 million tonnes). [14]