公开(公告)号：US07390932B2

公开(公告)日：2008-06-24

申请号：US10547440

申请日：2004-03-03

Applicant: Eckard Stroefer ,  Neven Lang ,  Ulrich Steinbrenner ,  Hans Hasse ,  Michael Ott ,  Thomas Grützner

Inventor： Eckard Stroefer ,  Neven Lang ,  Ulrich Steinbrenner ,  Hans Hasse ,  Michael Ott ,  Thomas Grützner

IPC: C07C45/78

CPC classification number: C07C45/002 ,  C07C45/82 ,  C07C47/04

Abstract: Process for preparing high-concentration gaseous formaldehyde having a molar CH2O:H2O ratio of ≧0.6 from an aqueous formaldehyde solution by evaporation of at least part of the solution, in which the aqueous formaldehyde solution is heated to a vaporization temperature T and the gas phase formed is taken off, wherein the evaporation temperature T obeys the relationship: T[° C.]≧T′min[° C.] where T′min(c)=A+B×(c/100)+C×(c/100)2+D×(c/100)3 and A=+68.759, B=+124.77, C=−12.851, D=−10.095, where c is the instantaneous CH2O content of the aqueous formaldehyde solution during the evaporation in percent by weight and is from 20 to 99% by weight.

Abstract translation: 从甲醛水溶液中制备具有摩尔CH 2 H 2 O:H 2 O 2比值> 0.6的高浓度气态甲醛的方法，通过蒸发至少部分 溶液，其中将甲醛水溶液加热至汽化温度T，取出形成的气相，其中蒸发温度T遵循以下关系：<？in-line-formula description =“In-line formula”end = “lead”？> T [°C]> = T'分钟<°C。<？in-line-formula description =“In-line Formulas”end =“tail”？> 其中T'分钟（c）= A + Bx（c / 100）+ Cx（c / 100）2 + Dx（c / 100） / SUP>和A = + 68.759，B = + 124.77，C = -12.851，D = -10.095，其中c是蒸发期间甲醛水溶液的瞬时CH 2 O 2含量百分比 为20〜99重量％。

公开(公告)号：US07342139B2

公开(公告)日：2008-03-11

申请号：US10588662

申请日：2005-02-10

Applicant: Bernd Rumpf ,  Eckhard Ströfer ,  Ortmund Lang ,  Neven Lang

Inventor： Bernd Rumpf ,  Eckhard Ströfer ,  Ortmund Lang ,  Neven Lang

IPC: C07C45/78

CPC classification number: C07C45/82 ,  C07C47/04

Abstract: A process for preparing a high-concentration formaldehyde solution by removing water from a lower-concentration formaldehyde solution having a formaldehyde content of from 5 to 50% by weight, in which the lower-concentration formaldehyde solution is fed to a preheater and heated in the preheater, depressurized via a pressure maintenance device and concentrated in a helical tube evaporator to give a vapor stream and the high-concentration formaldehyde solution as bottom stream, wherein the heated lower-concentration formaldehyde hyde solution is depressurized in the pressure maintenance device to give a two-phase mixture which is fed into the helical tube evaporator, is proposed.

Abstract translation: 通过从甲醛含量为5〜50重量％的低浓度甲醛溶液中除去水而制备高浓度甲醛溶液的方法，其中将低浓度甲醛溶液加入到预热器中并在 预热器，通过压力维持装置减压，并浓缩在螺旋管蒸发器中，得到蒸气流，高浓度甲醛溶液作为底部流，其中加压的低浓度甲醛海藻溶液在压力维持装置中减压，得到 提出了进入螺旋管蒸发器的两相混合物。

公开(公告)号：US20070293689A1

公开(公告)日：2007-12-20

申请号：US11665840

申请日：2005-10-20

Applicant: Markus Siegert ,  Neven Lang ,  Eckhard Stroefer ,  Achim Stammer ,  Thorsten Friese

Inventor： Markus Siegert ,  Neven Lang ,  Eckhard Stroefer ,  Achim Stammer ,  Thorsten Friese

IPC: C07D323/06

CPC classification number: C07D323/06

Abstract: Processes are disclosed comprising: (a) reacting an aqueous formaldehyde solution in a reactor in the presence of a suitable catalyst to obtain a reaction product mixture comprising trioxane, formaldehyde and water; (b) distilling the reaction product mixture to form a top stream comprising crude trioxane; and (c) treating the top stream in one or more additional stages to form pure trioxane; wherein an aqueous sidestream is drawn off during the distilling of the reaction mixture.

Abstract translation: 公开的方法包括：（a）在合适的催化剂存在下使甲醛水溶液在反应器中反应，得到包含三恶烷，甲醛和水的反应产物混合物; （b）蒸馏反应产物混合物以形成包含粗三恶烷的顶流; 和（c）在一个或多个附加阶段处理顶部流以形成纯三恶烷; 其中在蒸馏反应混合物期间抽出水分流。

公开(公告)号：US20060185513A1

公开(公告)日：2006-08-24

申请号：US10547440

申请日：2004-03-03

Applicant: Eckhard Stroefer ,  Neven Lang ,  Ulrich Steinbrenner ,  Hans Hasse ,  Thomas Grutzner

Inventor： Eckhard Stroefer ,  Neven Lang ,  Ulrich Steinbrenner ,  Hans Hasse ,  Thomas Grutzner

IPC: B01D19/00

CPC classification number: C07C45/002 ,  C07C45/82 ,  C07C47/04

Abstract: Process for preparing high-concentration gaseous formaldehyde having a molar CH2O:H2O ratio of ≧0.6 from an aqueous formaldehyde solution by evaporation of at least part of the solution, in which the aqueous formaldehyde solution is heated to a vaporization temperature T and the gas phase formed is taken off, wherein the evaporation temperature T obeys the relationship: T[° C.]≧T′min[° C.] where T′min(c)=A+B×(c/100)+C×(c/100)2+D×(c/100)3 and A=+68.759, B=+124.77, C=−12.851, D=−10.095, where c is the instantaneous CH2O content of the aqueous formaldehyde solution during the evaporation in percent by weight and is from 20 to 99% by weight.

Abstract translation: 从甲醛水溶液中制备具有摩尔CH 2 H 2 O:H 2 O 2比值> 0.6的高浓度气态甲醛的方法，通过蒸发至少部分 溶液，其中将甲醛水溶液加热至蒸发温度T，取出形成的气相，其中蒸发温度T遵循以下关系：<？in-line-formula description =“In-line formula”end = “lead”？> T [°C]> = T'分钟<°C。<？in-line-formula description =“In-line Formulas”end =“tail”？> 其中T'分钟（c）= A + Bx（c / 100）+ Cx（c / 100）2 + Dx（c / 100） / SUP>和A = + 68.759，B = + 124.77，C = -12.851，D = -10.095，其中c是蒸发期间甲醛水溶液的瞬时CH 2 O 2含量百分比 为20〜99重量％。