-
公开(公告)号：US5898087A
公开(公告)日：1999-04-27
申请号：US820795
申请日：1997-03-19
摘要： Disclosed is a process to produce paraformaldehyde prills having a low dissolution time and low concentration of insoluble formation. The insolubles are believed to lead to stickiness, tackiness, and loss of flowability of the product, loss of handling, and lead to storage problems of the final prill product. To address this problem, a concentrated formaldehyde solution is prepared having a purity ranging from 37%-99% and may be mixed with an amine additive, an amine and alcohol additive, or amine, alcohol, and caustic additive. Alternatively, the final prill may be sprayed with an amine or amine mixture stabilizer.
摘要翻译： 公开了一种制备低溶解时间和低浓度不溶性形成的多聚甲醛颗粒的方法。 据信这些不溶物会导致产品的粘性，粘性和流动性的损失，丢失处理，并导致最终的造粒产品的储存问题。 为了解决这个问题，制备纯度为37％-99％的浓缩甲醛溶液，并可与胺添加剂，胺和醇添加剂或胺，醇和苛性碱添加剂混合。 或者，最终的颗粒可以用胺或胺混合物稳定剂喷雾。
-
公开(公告)号：US5603835A
公开(公告)日：1997-02-18
申请号：US278352
申请日：1994-07-21
CPC分类号： C07C29/86
摘要： This invention relates to a process for improving the color of trimethylolpropane (TMP) by extracting color-causing impurities generated in the reaction to produce TMP. This improved color TMP is characterized by a reduced acid wash color and phthalic anhydride color--color measurement tests commonly used in the industry for assessing product quality and suitability of the TMP for certain color sensitive end-uses.
摘要翻译： 本发明涉及通过提取在反应中产生的产生色素的杂质产生TMP来改善三羟甲基丙烷（TMP）的颜色的方法。 这种改进的颜色TMP的特征在于降低了酸性洗涤颜色和邻苯二甲酸酐颜色测量测试，该测试通常用于业界用于评估TMP对某些颜色敏感终端用途的产品质量和适用性。
-
3.发明授权Catalytic composition for carbonylation including iridium and pyridine polymers 有权用于羰基化的催化组合物包括铱和吡啶聚合物公开(公告)号：US06458995B1
公开(公告)日：2002-10-01
申请号：US09540124
申请日：2000-03-31
IPC分类号： C07C5112
CPC分类号： B01J31/1658 , B01J31/181 , B01J2531/827 , C07C51/12 , Y02P20/582 , C07C53/08
摘要： An improvement to methanol carbonylation processes utilizing a homogeneous iridium catalyst system comprises adding a rate-promoting amount of an insoluble pyridine ring-containing polymer. Typically, polyvinylpyridine is added to the reactor in amounts of up to about 2 wt. percent.
摘要翻译： 使用均相铱催化剂体系对甲醇羰基化方法的改进包括加入速率促进量的不溶性吡啶环聚合物。 通常，将聚乙烯基吡啶以最多约2重量％的量加入到反应器中。 百分。
-
4.发明授权Process control in production of acetic acid via use of heavy phase density measurement 有权通过使用重相密度测量法生产乙酸的过程控制公开(公告)号：US06677480B2
公开(公告)日：2004-01-13
申请号：US10058547
申请日：2002-01-28
IPC分类号： C07C5112
摘要： A process for monitoring and controlling reactor conditions during the production of acetic acid by the catalyzed carbonylation of methanol is provided. The process of the present invention comprises measuring the density of the heavy phase of the light ends distillation column in the purification system of the carbonylation process. The density measurement is used to adjust the feed of methanol and/or to regulate the temperature in the reaction zone to optimize reactor conditions. The density measurement may also be used to adjust other parameters in the reactor system. The invention is also directed to the system for manufacturing acetic acid based on the process control procedure described.
摘要翻译： 提供了一种通过甲醇催化羰基化来监测和控制乙酸生产期间的反应器条件的方法。 本发明的方法包括在羰基化方法的净化系统中测量轻馏分蒸馏塔的重相的密度。 密度测量用于调节甲醇进料和/或调节反应区中的温度以优化反应器条件。 密度测量也可用于调节反应器系统中的其它参数。 本发明还涉及基于所述过程控制程序制造乙酸的系统。
-
5.发明授权Oxidation treatment of a recycle stream in production of acetic acid by methanol carbonylation 失效通过甲醇羰基化生产乙酸的循环流的氧化处理公开(公告)号：US06667418B2
公开(公告)日：2003-12-23
申请号：US10124200
申请日：2002-04-16
申请人： Jerry A. Broussard , Hung-Cheun Cheung , Stephen Andrew Houliston , Michael E. Huckman , Peggy McKarns Macatangay , Madan Singh , Michael L. Karnilaw , G. Paull Torrence
发明人： Jerry A. Broussard , Hung-Cheun Cheung , Stephen Andrew Houliston , Michael E. Huckman , Peggy McKarns Macatangay , Madan Singh , Michael L. Karnilaw , G. Paull Torrence
IPC分类号： C07C5112
CPC分类号： C07C51/487 , C07C51/12 , C07C53/08
摘要： A method and system is provided for producing acetic acid by the catalytic carbonylation of methanol with carbon monoxide to obtain a reaction product stream comprising acetic acid and a minor amount of acetaldehyde. The acetaldehyde content in the reaction product stream is reduced by oxidation to convert at least a portion of the acetaldehyde in the stream to acetic acid or further to CO2 and H2O. The oxidized stream may then be directed to the purification section, the reaction section, or both whereby the deleterious effects of acetaldehyde are reduced. Advantage of the present invention over conventional processes is the reduced need to dispose of acetaldehyde as waste and improved overall system efficiency in the production of acetic acid.
摘要翻译： 提供了通过甲醇与一氧化碳的催化羰基化生产乙酸的方法和系统，以获得包含乙酸和少量乙醛的反应产物流。 通过氧化还原反应产物流中的乙醛含量，将至少一部分乙醛转化为乙酸或进一步转化为CO 2和H 2 O. 然后将氧化物流引导至纯化部分，反应部分或二者，由此降低乙醛的有害作用。 本发明优于常规方法的优点是减少了将乙醛作为废物处理的需要，并提高了乙酸生产中的整体系统效率。
-
6.发明授权Method and apparatus for sequesting entrained and volatile catalyst species in a carbonylation process 有权在羰基化过程中螯合和挥发性催化剂物种的方法和装置公开(公告)号：US06627770B1
公开(公告)日：2003-09-30
申请号：US09645642
申请日：2000-08-24
IPC分类号： C07C5112
摘要： A method and apparatus for sequestering entrained or volatile catalyst species in a carbonylation process includes contacting the product stream with a vinyl pyridine or a vinyl pyrrolidone resin bed which is operative to sequester entrained or volatile catalytic species. The invention is particularly useful in connection with the iridium catalyzed carbonylation of methanol wherein the loss of entrained or volatile catalyst species depletes the catalytic content of the reactor. The resin may be digested in order to recover the catalytic metals.
摘要翻译： 用于在羰基化方法中螯合夹带或挥发性催化剂物质的方法和装置包括使产物流与乙烯基吡啶或乙烯基吡咯烷酮树脂床接触，该床用于螯合夹带或挥发性催化物质。 本发明对于铱催化的甲醇羰基化特别有用，其中夹带或挥发性催化剂物质的损失消耗了反应器的催化剂含量。 可以将树脂消化以回收催化金属。
-
7.发明授权Rhodium/inorganic iodide catalyst system for methanol carbonylation process with improved impurity profile 有权铑/无机碘化物催化剂体系用于甲醇羰基化工艺，杂质分布改进公开(公告)号：US06323364B1
公开(公告)日：2001-11-27
申请号：US09386561
申请日：1999-08-31
申请人： Pramod Agrawal , Hung-Cheun Cheung , Darrell A. Fisher , Valerie Santillan , Mark O. Scates , Elaine C. Sibrel , G. Paul Torrence
发明人： Pramod Agrawal , Hung-Cheun Cheung , Darrell A. Fisher , Valerie Santillan , Mark O. Scates , Elaine C. Sibrel , G. Paul Torrence
IPC分类号： C07C5112
摘要： The method of the present invention provides an improvement upon prior art methanol carbonylation methods which substantially reduces the production of carbonyl impurities. The production of carbonyl impurities, particularly acetaldehyde, crotonaldehyde, and 2-ethyl crotonaldehyde, in methanol carbonylation reactions has been found to decrease by maintaining less than about 4.5 wt % methyl iodide in the reaction medium during the course of the reaction.
摘要翻译： 本发明的方法提供了现有技术的甲醇羰基化方法的改进，其大大降低了羰基杂质的产生。已经发现在甲醇羰基化反应中羰基杂质，特别是乙醛，巴豆醛和2-乙基巴豆醛的生产降低 通过在反应过程中在反应介质中维持少于约4.5重量％的甲基碘。
-
公开(公告)号：US06211405B1
公开(公告)日：2001-04-03
申请号：US09178325
申请日：1998-10-23
IPC分类号： C07C5112
摘要： The present invention provides a process for the carbonylation of an alcohol, ether or ester to products comprising a carboxylic acid, the anhydride thereof or coproduction of the carboxylic acid and anhydride. More particularly, the present invention provides a process for the carbonylation of methanol to produce acetic acid by reacting methanol with carbon monoxide in a liquid reaction medium containing a catalyst comprising rhodium, iridium, iodide ion, and said reaction medium further comprising water, acetic acid, methyl iodide, and methyl acetate and subsequently recovering acetic acid from the resulting reaction product.
摘要翻译： 本发明提供了一种将醇，醚或酯羰基化成产物的方法，该方法包括羧酸，其酸酐或共聚的羧酸和酸酐。 更具体地说，本发明提供了一种通过甲醇与一氧化碳在含有铑，铱，碘离子的催化剂的液体反应介质中进行甲醇羰基化生产乙酸的方法，所述反应介质还包含水，乙酸 ，甲基碘和乙酸甲酯，随后从所得反应产物中回收乙酸。
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.029 秒)
