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1. 发明授权

US07345207B2 Production of high-concentration formaldehyde solutions 失效
标题翻译：生产高浓度甲醛溶液
公开(公告)号：US07345207B2
公开(公告)日：2008-03-18
申请号：US10547732
申请日：2004-03-04
申请人： Eckhard Stroefer , Neven Lang , Hans Hasse , Thomas Grützner , Michael Ott
发明人： Eckhard Stroefer , Neven Lang , Hans Hasse , Thomas Grützner , Michael Ott
IPC分类号： G07C45/78 , C08G8/04
CPC分类号： C07C45/002 , C07C45/82 , C07C47/04
摘要： Process for preparing high-concentration formaldehyde solutions having a CH2O content of ≧50% by weight from an aqueous formaldehyde solution having a lower CH2O content by evaporation of part of this solution (partial evaporation), in which the aqueous formaldehyde solution is heated to an evaporation temperature T at which the gas phase becomes enriched in water relative to the liquid phase and the gas phase formed is taken off continuously or discontinuously, wherein the evaporation temperature T obeys the relationship: T[° C.]
摘要翻译：通过蒸发具有较低CH 2 O 2含量的甲醛水溶液制备CH 2 O 2含量> 50重量％的高浓度甲醛溶液的方法该部分溶液（部分蒸发），其中甲醛水溶液被加热到气相相对于液相富集水的蒸发温度T，形成的气相连续或不连续地取出，其中蒸发温度T遵循以下关系：<？in-line-formula description =“In-line Formulas”end =“lead”？> T [°C。] <°C] <？in-line-formula description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“In-line Formulas”end =“lead”？>其中T < （c）= A + Bx（c / 100）+ Cx（c / 100）2 + Dx（c / 100）3 < line-formula description =“In-line Formulas”end =“tail”？> A = + 68.759，B = + 124.77，C = -12.851，D = -10.095，其中c是瞬时CH 2， / 在蒸发期间甲醛水溶液的重量百分比为20〜99重量％。

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