Nalco published its latest financial results this week, revealing sales of $3.75 billion (2.40 billion pounds) for the period.
Net earnings of $61 million were declared, resulting in diluted earnings per share of 44 cents.
Fourth-quarter sales reached $1.01 billion - a rise of five per cent nominally from the third quarter.
During the period, all segments enjoyed their highest quarterly sales of the year, the company revealed.
Erik Fyrwald, Nalco's chairman and chief executive officer, declared: "We are pleased with our success in 2009 in also aggressively controlling internal costs to offset revenue losses from customers who shut down sites due to economic conditions."
In November, Nalco unveiled the results of a new environmental initiative that aims to use one of its own patent-pending processes.
The firm will begin pilot plant production of quaternized dimethylaminoethyl acrylate for use in its industrial water treatment programmes, it revealed.See all the latest jobs in Science