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公开(公告)号：US5011987A
公开(公告)日：1991-04-30
申请号：US523868
申请日：1990-05-15
IPC分类号： C07C51/265 , C07C51/44 , C07C51/487 , C07C63/04
CPC分类号： C07C51/44
摘要： A process for manufacturing high-purity o-toluic acid from a partial oxidation product of o-xylene is disclosed. o-Toluic acid is widely used as a raw material for agricultural chemicals, medicines, polymerization initiators, and the like. Depending on its use, 99% by weight or more purity is demanded for o-toluic acid. Hitherto, o-toluic acid having purity of higher than 99% by weight could not be obtained by fractionation, and purification by fractional crystallization was used. Fractional crystallization is, however, and expensive operation and not only gives a low yield of product but also results a large amount of waste water. The process disclosed herein gives an economical, commercial way to obtain high purity o-toluic acid. In summary, a process for the manufacture of high purity o-toluic acid which comprises: subjecting an oxidation product of o-xylene to distillation to remove therefrom low boiling point components such as unreacted o-xylene and benzoic acid, and high boiling point components, of which the major component is o-methylbenzyl o-toluate, thus obtaining crude o-toluic acid, treating said crude o-toluic acid with ammonia of an amount 1 to 1.2 mol equivalent of o-phthalic acid contained in said crude o-toluic acid, and subjecting the product thus treated to distillation is disclosed.
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公开(公告)号：US5880310A
公开(公告)日：1999-03-09
申请号：US65233
申请日：1998-04-23
CPC分类号： C07C67/08
摘要： Provided is a process for producing a plasticizer ester characterized by previously removing dissolved oxygen in a starting alcohol, and then subjecting an organic acid or its anhydride and the alcohol to an esterification reaction in the presence of an organic metal compound catalyst, which process can substantially reduce formation of coloring impurities and can easily provide a plasticizer ester having a low degree of coloring.Further, a plasticizer ester having a high volume resistivity can easily be obtained by adding an alkaline aqueous solution to a reaction product obtained by an esterification reaction to conduct neutralization of an unreacted acid and hydrolysis of the catalyst, further blowing a carbon dioxide gas to convert the residual alkali into a carbonate, recovering an excess alcohol, and then conducting purification through finefiltration using a filter aid or further in combination with adsorption treatment.
摘要翻译： 提供一种生产增塑剂的方法，其特征在于预先除去起始醇中的溶解氧，然后在有机金属化合物催化剂存在下使有机酸或其酸酐和醇进行酯化反应，该方法基本上 减少着色杂质的形成，并且可以容易地提供着色程度低的增塑剂酯。 此外，通过将碱性水溶液加入到通过酯化反应获得的反应产物中以导致未反应的酸的中和并水解催化剂，进一步吹入二氧化碳气体以进行转化，可以容易地获得具有高体积电阻率的增塑剂酯 将残留的碱转化成碳酸盐，回收过量的醇，然后通过使用助滤剂进行微滤或进一步与吸附处理组合进行纯化。
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公开(公告)号：US5208383A
公开(公告)日：1993-05-04
申请号：US825275
申请日：1992-01-24
IPC分类号： C07C45/46
CPC分类号： C07C45/46
摘要： A process for producing an aromatic acylation product from an aromatic compound, an olefin and carbon monoxide, which comprises the steps of:(a) reacting an olefin with carbon monoxide in the presence of hydrogen fluoride and boron trifluoride at a pressure of not more than 100 kg/cm.sup.2 G to prepare an acyl fluoride synthesis solution,(b) allowing the acyl fluoride synthesis solution to absorb boron trifluoride to form a complex of acyl fluoride and boron trifluoride,(c) subjecting an aromatic compound to an acylation reaction with a reaction mixture containing the complex of acyl fluoride and boron trifluoride, obtained in the step (b), to form a complex of boron trifluoride, hydrogen fluoride and an aromatic acylation compound, provided that the amount of the acyl fluoride in the complex of acyl fluoride and boron trifluoride is less than 1 mole per mole of the aromatic compound, and(d) separating the aromatic acylation compound from the complex formed in the step (c) by heating a reaction mixture obtained in the step (c).
摘要翻译： 一种由芳族化合物，烯烃和一氧化碳生产芳族酰化产物的方法，包括以下步骤：（a）在氟化氢和三氟化硼的存在下，使烯烃与一氧化碳在不大于 100kg / cm2G以制备酰基氟合成溶液，（b）使酰基氟合成溶液吸收三氟化硼以形成酰氟和三氟化硼的络合物，（c）使芳族化合物与反应进行酰化反应 含有步骤（b）中得到的酰氟和三氟化硼的络合物的混合物，形成三氟化硼，氟化氢和芳族酰化化合物的络合物，条件是酰基氟络合物中的酰基氟和 三氟化硼每摩尔芳族化合物少于1摩尔，和（d）通过加热芳族酰化化合物与步骤（c）中形成的络合物分离芳族酰化化合物 在步骤（c）中获得的载体混合物。
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4.发明授权
公开(公告)号：US4967011A
公开(公告)日：1990-10-30
申请号：US392514
申请日：1989-08-11
申请人： Nobuyuki Tokura , Tadayoshi Takefumi , Shunichi Matsumoto , Tatsuhiko Yanagawa , Yoshihiro Shiokawa , Ichiyo Ohtsuka
发明人： Nobuyuki Tokura , Tadayoshi Takefumi , Shunichi Matsumoto , Tatsuhiko Yanagawa , Yoshihiro Shiokawa , Ichiyo Ohtsuka
IPC分类号： B01J27/12 , C07B61/00 , C07C45/00 , C07C45/46 , C07C45/78 , C07C45/82 , C07C45/83 , C07C45/85 , C07C49/76 , C07C49/782 , C07C67/00
摘要： The present invention relates to a process for decomposing an aromatic acylated compound.HF-BF.sub.3 complex in preparing an aromatic acylated compound by decomposing an aromatic acylated compound.HF-BF.sub.3 complex obtained by reacting an aromatic compound with an acylating agent in the presence of HF-BF.sub.3 as a catalyst, which comprises subjecting the aromatic acylated compound.HF-BF.sub.3 complex to thermal decomposition in the presence of at least one aromatic hydrocarbon (A.H.) selected from benzene, toluene and chlorobenzene and at least one saturated aliphatic hydrocarbon (S.H.) selected from pentane, hexane and cyclohexane, as a decomposing agent.
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公开(公告)号：US5463095A
公开(公告)日：1995-10-31
申请号：US260237
申请日：1994-06-14
摘要： A process for the production of esters, comprising allowing an olefin, carbon monoxide and an alcohol to react in the presence of hydrogen fluoride, in which the esters can be produced at high yields at a low temperature for a short period of time, the esters can be easily separated from a reaction solution, hydrogen fluoride can be recycled, the esters can be produced at a low cost, a mixture of esters can be easily produced, the kinetic viscosity of the mixture of the esters can be easily adjusted and the coloring of, and an increase in the viscosity of, the esters can be prevented.
摘要翻译： 一种生产酯的方法，包括使烯烃，一氧化碳和醇在氟化氢存在下反应，其中酯可以在低温下以高产率在短时间内生产，酯 可以容易地从反应溶液中分离，氟化氢可以循环使用，可以低成本生产酯，可以容易地生产酯的混合物，可以容易地调节酯的混合物的动力粘度，并且着色 并且可以防止酯的粘度增加。
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