Company Filing History:
Years Active: 1994-1997
Title: Innovations by Hans G Lindberg in Metal Treatment Technologies
Introduction
Hans G Lindberg is an accomplished inventor based in Glens Falls, NY (US). He has made significant contributions to the field of metal treatment technologies, holding a total of 5 patents. His work primarily focuses on methods for controlling metals in bleach plants and improving the efficiency of pulp mill operations.
Latest Patents
One of his latest patents is a method of controlling metals in a bleach plant using oxidation. This innovative approach facilitates the removal of metals from acidic liquids containing dissolved metals, such as those found in pulp mill bleach plant washer filtrate. By oxidizing the liquid with ozone, hydrogen peroxide, oxygen, and/or air, the valence of metals like manganese (Mn) and iron (Fe) is increased, making them easier to precipitate. The oxidation process can be conducted using various reactors, including gas-contact reactors and stirred tanks. After oxidation, the pH of the liquid is adjusted to over 6, preferably around 8-11, to precipitate the metals, which are then removed through filtration, sedimentation, or flotation.
Another notable patent involves the treatment of bleach plant effluents. This process removes bleaching chemical-consuming metals from treatment fluids in a cellulose pulp mill. The pulp is treated in an acidic or neutral stage to dissolve metals, followed by washing or thickening to produce a filtrate containing dissolved metals. An alkali liquid is then used to adjust the pH of the filtrate, causing the dissolved metals to precipitate. The alkali liquid is pretreated with carbon dioxide to reduce sulfide content and increase carbonate content, with preferred alkali liquids being green liquor and white liquor.
Career Highlights
Throughout his career, Hans G Lindberg has worked with several prominent companies, including Kamyr, Inc. and Ahlstrom Machinery, Inc. His expertise in metal treatment technologies has made him a valuable asset in the pulp and paper industry.
Collaborations
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Conclusion
Hans G Lindberg's innovative patents and contributions to metal treatment technologies have significantly advanced the efficiency of pulp mill operations. His work continues to influence the industry and improve environmental sustainability.
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