专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

AT247620T 未知
公开(公告)号：AT247620T
公开(公告)日：2003-09-15
申请号：AT97912748
申请日：1997-10-17
申请人： CELANESE INT CORP
发明人： SINGH MADAN , BLAY GEORGE A , KARNILAW MICHAEL L , MEILCHEN MELCHIOR A , PICARD WAYNE DAVID , SANTILLAN VALERIE , SCATES MARK O , TANKE ROBIN SUZANNE , TORRENCE G PAULL , VOGEL RICHARD F JR , WARNER R JAY
IPC分类号： B01J27/32 , B01J38/00 , C07C51/00 , C07C51/12 , C07C51/44 , C07C51/48 , C07C53/08 , C08G2/12 , C08G2/28
摘要： Disclosed is a method to manufacture high purity acetic acid. Although described in relation to that produced by a low water carbonylation process the present invention is applicable to other mechanisms for production of acetic acid which results in formation of permanganate reducing compounds such as acetaldehyde, propionic acid, and alkyl iodide impurities in intermediate process streams. It has been found that permanganate reducing compounds and alkyl iodides may be conveniently removed from a light phase of an intermediate stream in the reaction process by employing a multiple distillation process coupled with an optional extraction of acetaldehyde. The distillation process involves first distilling a light phase to concentrate the permanganate reducing compounds, and in particular the acetaldehyde, and then separating the permanganate reducing compounds and alkyl iodides in a second distillation tower. The second distillation serves to remove the permanganate reducing compounds and alkyl iodides from methyl iodide, methyl acetate, and methanol mixture. As an optional third step, the twice distilled stream may be directed to an extractor to remove any remaining quantities of methyl iodide from the aqueous acetaldehyde stream to obtain acetic acid as a final product in greater than 99% purity. It has been found that this process removes at least 50% of the permanganate reducing compounds and alkyl iodides and at least 20% of the propionic acid impurity from the intermediate light phase stream, and results in lower alkyl iodide concentration in the carbonylation reaction process, and in particular in the carbonylation reactor. It has also been found that during shut down of the inventive process, polymers of acetaldehyde tend to form in the base of the second distillation tower. To avoid or minimize the formation of these polymers, a constant flow of solvent is passed through the base of the column.

2. 发明专利

CZ137599A3 PROCESS OF REMOVING SUBSTANCES REDUCING PERMANGANATE AND ALKYL IODIDES 未知
公开(公告)号：CZ137599A3
公开(公告)日：1999-09-15
申请号：CZ137599
申请日：1997-10-17
申请人： CELANESE INT CORP
发明人： SINGH MADAN , BLAY GEORGE A , KARNILAW MICHAEL L , MEILCHEN MELCHIOR A , PICARD WAYNE D , SANTILLAN VALERIE , SCATES MARK O , TANKE ROBIN S , TORRENCE PAULL G , VOGEL RICHARD F JR , WARNER JAY R
IPC分类号： B01J27/32 , B01J38/00 , C07C51/00 , C07C51/12 , C07C51/44 , C07C51/48 , C07C53/08 , C08G2/12 , C08G2/28 , C07C51/42
摘要： Disclosed is a method to manufacture high purity acetic acid. Although described in relation to that produced by a low water carbonylation process the present invention is applicable to other mechanisms for production of acetic acid which results in formation of permanganate reducing compounds such as acetaldehyde, propionic acid, and alkyl iodide impurities in intermediate process streams. It has been found that permanganate reducing compounds and alkyl iodides may be conveniently removed from a light phase of an intermediate stream in the reaction process by employing a multiple distillation process coupled with an optional extraction of acetaldehyde. The distillation process involves first distilling a light phase to concentrate the permanganate reducing compounds, and in particular the acetaldehyde, and then separating the permanganate reducing compounds and alkyl iodides in a second distillation tower. The second distillation serves to remove the permanganate reducing compounds and alkyl iodides from methyl iodide, methyl acetate, and methanol mixture. As an optional third step, the twice distilled stream may be directed to an extractor to remove any remaining quantities of methyl iodide from the aqueous acetaldehyde stream to obtain acetic acid as a final product in greater than 99% purity. It has been found that this process removes at least 50% of the permanganate reducing compounds and alkyl iodides and at least 20% of the propionic acid impurity from the intermediate light phase stream, and results in lower alkyl iodide concentration in the carbonylation reaction process, and in particular in the carbonylation reactor. It has also been found that during shut down of the inventive process, polymers of acetaldehyde tend to form in the base of the second distillation tower. To avoid or minimize the formation of these polymers, a constant flow of solvent is passed through the base of the column.

3. 发明专利

AU4985597A Removal of permanganate reducing compounds and alkyl iodides from a carbonylation process stream 未知
公开(公告)号：AU4985597A
公开(公告)日：1998-05-15
申请号：AU4985597
申请日：1997-10-17
申请人： CELANESE INT CORP
发明人： SINGH MADAN , BLAY GEORGE A , KARNILAW MICHAEL L , MEILCHEN MELCHIOR A , PICARD WAYNE DAVID , SANTILLAN VALERIE , SCATES MARK O , TANKE ROBIN SUZANNE , TORRENCE G PAULL , VOGEL RICHARD F JR , WARNER R JAY
IPC分类号： B01J27/32 , B01J38/00 , C07C51/00 , C07C51/12 , C07C51/44 , C07C51/48 , C07C53/08 , C08G2/12 , C08G2/28
摘要： Disclosed is a method to manufacture high purity acetic acid. Although described in relation to that produced by a low water carbonylation process the present invention is applicable to other mechanisms for production of acetic acid which results in formation of permanganate reducing compounds such as acetaldehyde, propionic acid, and alkyl iodide impurities in intermediate process streams. It has been found that permanganate reducing compounds and alkyl iodides may be conveniently removed from a light phase of an intermediate stream in the reaction process by employing a multiple distillation process coupled with an optional extraction of acetaldehyde. The distillation process involves first distilling a light phase to concentrate the permanganate reducing compounds, and in particular the acetaldehyde, and then separating the permanganate reducing compounds and alkyl iodides in a second distillation tower. The second distillation serves to remove the permanganate reducing compounds and alkyl iodides from methyl iodide, methyl acetate, and methanol mixture. As an optional third step, the twice distilled stream may be directed to an extractor to remove any remaining quantities of methyl iodide from the aqueous acetaldehyde stream to obtain acetic acid as a final product in greater than 99% purity. It has been found that this process removes at least 50% of the permanganate reducing compounds and alkyl iodides and at least 20% of the propionic acid impurity from the intermediate light phase stream, and results in lower alkyl iodide concentration in the carbonylation reaction process, and in particular in the carbonylation reactor. It has also been found that during shut down of the inventive process, polymers of acetaldehyde tend to form in the base of the second distillation tower. To avoid or minimize the formation of these polymers, a constant flow of solvent is passed through the base of the column.

4. 发明专利

CA2267887A1 REMOVAL OF PERMANGANATE REDUCING COMPOUNDS AND ALKYL IODIDES FROM A CARBONYLATION PROCESS STREAM 未知
公开(公告)号：CA2267887A1
公开(公告)日：1998-04-30
申请号：CA2267887
申请日：1997-10-17
申请人： CELANESE INT CORP
发明人： MEILCHEN MELCHIOR A , KARNILAW MICHAEL L , TORRENCE G PAULL , PICARD WAYNE D , SANTILLAN VALERIE , SCATES MARK O , VOGEL RICHARD F JR , TANKE ROBIN S , SINGH MADAN , BLAY GEORGE A , WARNER R JAY
IPC分类号： B01J27/32 , B01J38/00 , C07C51/00 , C07C51/12 , C07C51/44 , C07C51/48 , C07C53/08 , C08G2/12 , C08G2/28
摘要： Disclosed is a method to manufacture high purity acetic acid. Although described in relation to that produced by a low water carbonylation process the present invention is applicable to other mechanisms for production of acetic acid which results in formation of permanganate reducing compounds such as acetaldehyde, propionic acid, and alkyl iodide impurities in intermediate process streams. It has been found that permanganate reducing compounds and alkyl iodides may be conveniently removed from a light phase of an intermediate stream in the reaction process by employing a multiple distillation process coupled with an optional extraction of acetaldehyde. The distillation process involves first distilling a light phase to concentrate the permanganate reducing compounds, and in particular the acetaldehyde, and then separating the permanganate reducing compounds and alkyl iodides in a second distillation tower. The second distillation serves to remove the permanganate reducing compounds and alkyl iodides from methyl iodide, methyl acetate, and methanol mixture. As an optional third step, the twice distilled stream may be directed to an extractor to remove any remaining quantities of methyl iodide from the aqueous acetaldehyde stream to obtain acetic acid as a final product in greater than 99 % purity.

6. 发明专利

ID21867A 未知
公开(公告)号：ID21867A
公开(公告)日：1999-08-05
申请号：ID990179
申请日：1997-10-17
申请人： CELANESE INT CORP
发明人： SINGH MADAN , BLAY GEORGE A , KARNILAW MICHAEL L , MEILCHEN MELCHIOR A , PICARD WAYNE DAVID , SANTILLAN VALERI , SCATES MARK O , TANKE ROBIN SUZANNE , TORRENCE G PAULL , VOGEL RICHARD F JR , WARNER R JAY
IPC分类号： B01J27/32 , B01J38/00 , C07C51/00 , C07C51/12 , C07C51/44 , C07C51/48 , C07C53/08 , C08G2/12 , C08G2/28
摘要： Disclosed is a method to manufacture high purity acetic acid. Although described in relation to that produced by a low water carbonylation process the present invention is applicable to other mechanisms for production of acetic acid which results in formation of permanganate reducing compounds such as acetaldehyde, propionic acid, and alkyl iodide impurities in intermediate process streams. It has been found that permanganate reducing compounds and alkyl iodides may be conveniently removed from a light phase of an intermediate stream in the reaction process by employing a multiple distillation process coupled with an optional extraction of acetaldehyde. The distillation process involves first distilling a light phase to concentrate the permanganate reducing compounds, and in particular the acetaldehyde, and then separating the permanganate reducing compounds and alkyl iodides in a second distillation tower. The second distillation serves to remove the permanganate reducing compounds and alkyl iodides from methyl iodide, methyl acetate, and methanol mixture. As an optional third step, the twice distilled stream may be directed to an extractor to remove any remaining quantities of methyl iodide from the aqueous acetaldehyde stream to obtain acetic acid as a final product in greater than 99% purity. It has been found that this process removes at least 50% of the permanganate reducing compounds and alkyl iodides and at least 20% of the propionic acid impurity from the intermediate light phase stream, and results in lower alkyl iodide concentration in the carbonylation reaction process, and in particular in the carbonylation reactor. It has also been found that during shut down of the inventive process, polymers of acetaldehyde tend to form in the base of the second distillation tower. To avoid or minimize the formation of these polymers, a constant flow of solvent is passed through the base of the column.

7. 发明专利

CA2267887C REMOVAL OF PERMANGANATE REDUCING COMPOUNDS AND ALKYL IODIDESFROM A CARBONYLATION PROCESS STREAM 未知
公开(公告)号：CA2267887C
公开(公告)日：2007-01-09
申请号：CA2267887
申请日：1997-10-17
申请人： CELANESE INT CORP
发明人： TANKE ROBIN S , VOGEL RICHARD F JR , TORRENCE G PAULL , MEILCHEN MELCHIOR A , KARNILAW MICHAEL L , WARNER R JAY , SCATES MARK O , SANTILLAN VALERIE , SINGH MADAN , PICARD WAYNE D , BLAY GEORGE A
IPC分类号： B01J27/32 , C07C51/44 , B01J38/00 , C07C51/00 , C07C51/12 , C07C51/48 , C07C53/08 , C08G2/12 , C08G2/28
摘要： Disclosed is a method to manufacture high purity acetic acid. Although described in relation to that produced by a low water carbonylation process the present invention is applicable to other mechanism s for production of acetic acid which results in formation of permanganate reducing compounds such as acetaldehyde, propionic acid, and alkyl iodide impurities in intermediate process streams. It has been found that permanganate reducing compounds and alkyl iodides may be conveniently removed from a light phase of an intermediate stream in the reaction process by employing a multiple distillation process coupled with an optional extraction of acetaldehyde. The distillation process involves first distilling a light phase to concentrate the permanganate reducing compounds, and in particular the acetaldehyde, and then separating the permanganate reducing compounds and alkyl iodides in a second distillation tower. The second distillation serves to remove the permanganate reducing compounds and alkyl iodides from methyl iodide, methyl acetate, and methanol mixture. As an optional third step, the twice distilled stream may be direct ed to an extractor to remove any remaining quantities of methyl iodide from the aqueous acetaldehyde stream to obtain acetic acid as a final product in greater than 99% purity.

8. 发明专利

DK0934243T3 未知
公开(公告)号：DK0934243T3
公开(公告)日：2003-12-15
申请号：DK97912748
申请日：1997-10-17
申请人： CELANESE INT CORP
发明人： SINGH MADAN , BLAY GEORGE A , KARNILAW MICHAEL L , MEILCHEN MELCHIOR A , PICARD WAYNE DAVID , SANTILLAN VALERIE , SCATES MARK O , TANKE ROBIN SUZANNE , TORRENCE G PAULL , VOGEL RICHARD F JR , WARNER R JAY
IPC分类号： B01J27/32 , B01J38/00 , C07C51/00 , C07C51/12 , C07C51/44 , C07C51/48 , C07C53/08 , C08G2/12 , C08G2/28
摘要： Disclosed is a method to manufacture high purity acetic acid. Although described in relation to that produced by a low water carbonylation process the present invention is applicable to other mechanisms for production of acetic acid which results in formation of permanganate reducing compounds such as acetaldehyde, propionic acid, and alkyl iodide impurities in intermediate process streams. It has been found that permanganate reducing compounds and alkyl iodides may be conveniently removed from a light phase of an intermediate stream in the reaction process by employing a multiple distillation process coupled with an optional extraction of acetaldehyde. The distillation process involves first distilling a light phase to concentrate the permanganate reducing compounds, and in particular the acetaldehyde, and then separating the permanganate reducing compounds and alkyl iodides in a second distillation tower. The second distillation serves to remove the permanganate reducing compounds and alkyl iodides from methyl iodide, methyl acetate, and methanol mixture. As an optional third step, the twice distilled stream may be directed to an extractor to remove any remaining quantities of methyl iodide from the aqueous acetaldehyde stream to obtain acetic acid as a final product in greater than 99% purity. It has been found that this process removes at least 50% of the permanganate reducing compounds and alkyl iodides and at least 20% of the propionic acid impurity from the intermediate light phase stream, and results in lower alkyl iodide concentration in the carbonylation reaction process, and in particular in the carbonylation reactor. It has also been found that during shut down of the inventive process, polymers of acetaldehyde tend to form in the base of the second distillation tower. To avoid or minimize the formation of these polymers, a constant flow of solvent is passed through the base of the column.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式