Distillation: processes – separatory – Adding material to distilland except water or steam per se – Organic compound
Reexamination Certificate
2005-10-18
2005-10-18
Manoharan, Virginia (Department: 1764)
Distillation: processes, separatory
Adding material to distilland except water or steam per se
Organic compound
C203S016000, C203S017000, C203S077000, C203S078000, C203S079000, C203S080000, C159S047300, C159S901000, C159SDIG002, C162S016000, C162S038000, C162S076000, C549S490000, C562S608000, C562S609000
Reexamination Certificate
active
06955743
ABSTRACT:
The invention relates to a process for recovering and producing chemicals in a pulp production process where organic chemicals, such as formic acid and acetic acid, are used as cooking chemicals. The process of the invention is based on regeneration of cooking acids and formation of additional cooking acids and furfural by evaporating the cooking liquor and then separating acetic acid, formic acid, furfural and water. The separation is preferably carried out by distillation using the furfural formed in the process as a distilling aid in the distillation.
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Anttila Juha
Rousu Esa
Rousu Päivi
Rousu Pasi
Tanskanen Juha
Alston & Bird LLP
Chempolis Oy
Manoharan Virginia
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