Who invented the pulp paper plant?

The invention of the pulp paper plant cannot be attributed to a single individual, as it evolved over time through various innovations in the paper-making process. However, the significant development of the mechanical pulping process is often associated with inventors like Friedrich Gottlieb Keller, who patented a wood pulp process in 1843. Additionally, the industrialization of pulp production was significantly advanced by the introduction of the chemical pulping process in the late 19th century.