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Stockhausen, a subsidiary of Degussa, develops a special product for de-inking and de-watering of sludge

Best results thanks to PRAESTOL® 806 BC


Originally developed for the Nordic market, PRAESTOL® 806 BC is now poised for success throughout Europe. De-inking and de-watering of sludges is better performing and less expensive with this high-molecular, low- cationic polymer product from Stockhausen, a subsidiary of Degussa.

The primary benefit: The product matches the demands of the sludges in a standard de-inking plant, making it an excellent dewatering agent. "De-inking sludges are particularly difficult to dewater because they contain a high proportion of fine ink and organic particles," explained Dr. Michael Brüne, head of Stockhausen's Product Line Paper. With PRAESTOL® 806 BC, these kinds of sludges are no longer a problem. On the contrary, thanks to excellent de-watering qualities, polymer use can be reduced, thereby reducing costs. "Our customers in Scandinavia and throughout Europe have been more than satisfied with the product and its performance," Dr. Brüne emphasized. Today already more than 2 million tons of paper are produced with benefits from the PRAESTOL® 806 BC technology.

A comprehensive selection of flocculating agents for separating solids from liquids is available under the PRAESTOL® brand name. Based on polyacrylamide, PRAESTOL® products can be used to treat and condition fresh and process water, to clean waste water and as an aid to the mechanical dewatering of sludges. They are also used to prepare fresh water for use in the paper industry. Using PRAESTOL® ensures maximum removal of suspended particles from circulation water. The additives help clarify white water and mill effluents more efficiently. During the clarification process, they accelerate settling in sedimentation basins, clearing funnels and similar sedimentation equipment. They also ensure optimal thickening and dewatering of sludges.

Stockhausen, a subsidiary of Degussa, offers a large selection of high-quality water treatment products and products for the paper industry through its affiliates Stockhausen Nordic OY in Finland and Stockhausen Nordic AB in Sweden. And emphasis is placed on customer-oriented service: "Due to our application laboratory and the numerous paper experts working in the customer service, we are able to respond directly to customers' wishes and offer solutions to special requirements quickly," Dr. Brüne said. "Finland and Sweden are among the most important paper-producing countries, so they are of special strategic interest for us," he added.

Another product in Stockhausen's program is a new, environmentally friendly method for reducing slime and deposits. Available under the brand name TALLOFIN®, this project ensures good runnability of the paper machine, reduces the need for system cleaning and produces paper of consistently high quality. Nearly 200 applications on paper machines all over the world give evidence of the success of the TALLOFIN® deposit control concept. With its TALLOFIN® biodispersants Stockhausen is the market leader in Scandinavia, thanks in part to the exceptional research findings of our ,Deposit Control Laboratory' in Helsinki.

With the help of the retention aid PRAESTARET®, it is possible to make the most of the raw materials used to produce paper. Particularly innovative are the new, oil-free and low-salt retention aids in the PRAESTARET® K 300 series, offered exclusively by Degussa. These products optimize de-watering on the paper machine and are easy on the environment. They consist of a fixing agent and a retention aid – a dual system in a single product – and provide numerous advantages: among others, improved formation, increased retention and excellent de- watering performance at even reduced costs. The chemistry provides an additional benefit: These products are easy to dissolve with comparable simple equipment. The advantages affect the entire paper machine, improving product quality and machine runnability.

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