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US Patent 7794604 Method for removing lignin from water

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Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

Patent Inventor Names

Arja Paloniemi0

Heikki Palonen0

Päivi Rousu0

Reetta Taittonen0

Date of Patent

September 14, 2010

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Patent Application Number

115718460

Date Filed

July 8, 2005

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Patent Primary Examiner

Peter A. Hruskoci

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Patent abstract

The invention relates to a method for removing lignin from an aqueous solution. It is accomplished by adding a calcium compound and an aluminium compound to said solution. Said calcium compound is preferably calcium chloride and said aluminium compound is preferably a polymeric aluminium hydroxide salt.

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