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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 ...
In 2009, NBSK pulp sold for $650/ton in the United States. The price had dropped due to falling demand when newspapers reduced their size, in part, as a result of the recession. [42] By 2024 this price had recovered to $1315/ton. [43]
The range of prices is typically between US$18 to US$30 per (wet)-ton delivered. [43] In 2006, prices were US$15 and US$30 per wet-ton in the northeast. [44] In the 20 years leading up to 2008, prices have fluctuated between US$60–70/oven-dry metric ton (odmt) in the southern states, and between US$60/odmt and US$160/odmt in the Northwest. [45]
A pulp mill in Rauma, Finland Woodchips for paper production. A pulp mill is a manufacturing facility that converts wood chips or other plant fiber sources into a thick fiber board which can be shipped to a paper mill for further processing. Pulp can be manufactured using mechanical, semi-chemical, or fully chemical methods (kraft and sulfite ...
NEWARK, Del, Dec. 12, 2024 (GLOBE NEWSWIRE) -- The global wood pulp market is poised for significant growth, with its size estimated to reach USD 80.2 billion in 2024 and projected to surpass USD 101.0 billion by 2034, expanding at a CAGR of 2.4% during the forecast period.
Tall oil is the third largest chemical by-product in a kraft mill after lignin and hemicellulose; the yield of crude tall oil from the process is in the range of 30–50 kg / ton pulp. [4] It may contribute to 1.0–1.5% of the mill's revenue if not used internally. [citation needed]
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A typical refiner pulp can require 2000 kWh/mass ton pulp. [1] A larger mechanical pulp and paper mill can, including the paper production, consume 200-300 MW electricity. The chemical pulping processes can often generate enough energy (steam and electricity) to make the mill energy self-sufficient.