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公开(公告)号：US5649322A
公开(公告)日：1997-07-15
申请号：US571625
申请日：1995-12-11
IPC分类号： C07C201/04 , C07C203/00 , C07C203/02
CPC分类号： C07C201/04
摘要： C.sub.1 -C.sub.4 -Alkyl nitrites can be prepared by reaction of C.sub.1 -C.sub.4 -alkanols with nitrogen oxides with the participation of oxygen in a reactor designed as a scrubber column, nitrogen oxides having a proportion of more than 50% of NO of the total amount of gram atoms of N of the nitrogen oxides, oxygen and optionally inert gas being fed into the lower part of the reactor. 5 to 60% of the total amount of C.sub.1 -C.sub.4 -alkanol used is likewise fed into the lower part of the reactor in vaporous or atomized form, while the remaining C.sub.1 -C.sub.4 -alkanol is delivered to the column head.
摘要翻译： C1-C4烷基亚硝酸盐可以通过在设计为洗涤塔的反应器中将C1-C4-链烷醇与氮氧化物反应而制备，氧化反应设计为总量超过NO的50％ 的氮原子的氮原子的克原子，氧和任选的惰性气体被供给到反应器的下部。 使用的C 1 -C 4烷醇的总量的5-60％同样以蒸气或雾化的形式进料到反应器的下部，而剩余的C1-C4-链烷醇被输送到塔头。
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公开(公告)号：US5562887A
公开(公告)日：1996-10-08
申请号：US336365
申请日：1994-11-08
摘要： Alkyl nitrite-containing exhaust gases are purified in continuous form by treating them with equimolar to excess amidosulphuric acid in the form of an aqueous solution in the manner of a counter-current scrubbing at a temperature of 0.degree.-100.degree. C.
摘要翻译： 含有亚烷基亚烷基的废气通过在0℃-100℃的温度下以逆流洗涤的方式以等摩尔至过量的酰胺硫酸的水溶液的形式，以连续的形式进行纯化。
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公开(公告)号：US5449806A
公开(公告)日：1995-09-12
申请号：US272497
申请日：1994-07-08
摘要： Dialkyl carbonates can be prepared by reacting carbon monoxide with alkyl nitrites in a continuous gas phase reaction in the presence of a catalyst using a fixed bed reactor with a short catalyst bed in the direction of flow. The dialkyl carbonates are formed with almost quantitative selectivity; thermal decomposition of the alkyl nitrite, with the resulting formation of decomposition products, is not observed.
摘要翻译： 碳酸二烷基酯可以通过在催化剂存在下在连续气相反应中使一氧化碳与烷基亚硝酸盐反应来制备，所述催化剂使用在流动方向上具有短催化剂床的固定床反应器。 以几乎定量的选择性形成碳酸二烷基酯; 没有观察到亚硝酸烷基酯的热分解，从而形成分解产物。
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公开(公告)号：US5478960A
公开(公告)日：1995-12-26
申请号：US408240
申请日：1995-03-22
IPC分类号： B01J23/44 , B01J27/13 , C07B61/00 , C07C31/04 , C07C41/50 , C07C43/315 , C07C303/30 , C07C309/68 , C07C315/04 , C07C317/18 , C07C319/20 , C07C323/11 , C07F7/08 , C07F7/18 , C07F9/28 , C07F9/40 , C07F9/02
CPC分类号： C07F7/1892 , C07C303/30 , C07C31/04 , C07C315/04 , C07F7/083 , C07F9/4006 , Y02P20/52
摘要： Heterosubstituted acetals of the formula ##STR1## can be obtained by reacting vinyl compounds of the formulaCH.sub.2 .dbd.CH-A.sup.1 (II)with alkyl nitrites of the formulaR.sup.1 --ONO (III.)The reaction is performed in the presence of palladium in metallic or bonded form and in alcohols or ethers as reaction medium at from 0.degree. to 120.degree. C.
摘要翻译： 式（I）的取代双缩醛可以通过使式CH 2 = CH-Al（II）的乙烯基化合物与式R1-ONO（III）的亚硝酸烷基酯反应来获得。该反应在 金属或键合形式的钯和作为反应介质的醇或醚在0-120℃
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15.发明授权Process for separating off methanol from a mixture of dimethyl carbonate and methanol 失效从碳酸二甲酯和甲醇的混合物中分离甲醇的方法
公开(公告)号：US5455368A
公开(公告)日：1995-10-03
申请号：US351860
申请日：1994-12-08
CPC分类号： C07C68/08
摘要： Methanol can be substantially removed from dimethyl carbonate (DMC)/methanol mixtures by absorption on ion exchange resins. The enriched DMC is obtained as filtrate. The absorption is carried out at from -50.degree. C. to +100.degree. C. and 0.1-10 bar.
摘要翻译： 通过在离子交换树脂上吸收，甲醇可以从碳酸二甲酯（DMC）/甲醇混合物中基本上除去。 得到富集的DMC作为滤液。 吸收在-50℃至+ 100℃和0.1-10巴之间进行。
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公开(公告)号：US5886232A
公开(公告)日：1999-03-23
申请号：US608651
申请日：1996-02-29
IPC分类号： B01J23/44 , C07B61/00 , C07C45/00 , C07C49/403 , C07C49/463 , C07C49/497 , C07C49/517 , C07C61/08 , C07C67/30 , C07C69/757 , C07C231/12 , C07C233/32
CPC分类号： C07C45/006 , C07C231/12
摘要： Substituted cyclohexanones of the formula ##STR1## where R.sup.1 to R.sup.5 are as defined in the description, can be obtained by catalytic hydrogenation of phenols of the formula ##STR2## where R.sup.1 to R.sup.5 are as defined in the description.The reaction is carried out at from 20.degree. to 250.degree. C., from 1 to 200 bar and in an ether as solvent. If desired, an alkaline alkali metal, alkaline earth metal or ammonium compound is used as additive.
摘要翻译： 式（I）的取代的环己酮其中R1至R5如说明书中所定义，可以通过式（II）的酚的催化氢化获得，其中R 1至R 5如说明书中所定义。 反应在20-250℃，1-200巴和乙醚作为溶剂进行。 如果需要，碱性碱金属，碱土金属或铵化合物被用作添加剂。
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公开(公告)号：US5756824A
公开(公告)日：1998-05-26
申请号：US730627
申请日：1996-10-21
IPC分类号： C07C281/02 , C07C261/00
CPC分类号： C07C281/02
摘要： Alkyl carbazates of the formula R.sup.1 --O--CO--NH--NH.sub.2 (I) are prepared in an advantageous manner by reacting an alkyl carbazate of the formula R.sup.2 --O--CO--NH--NH.sub.2 (II) with alcohols of the formula R.sup.1 --OH (III) in the presence of a catalyst, where the symbols used in the formulae are as defined in the description.
摘要翻译： 通过使式R 2 -O-CO-NH-NH 2（II）的肼基甲酸烷基酯与式R1-0的醇反应制备式R 1 -O-CO-NH-NH 2（I）的烷基肼基甲酸酯， OH（III）在催化剂存在下进行，其中式中使用的符号如说明书中所定义。
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公开(公告)号：US5302742A
公开(公告)日：1994-04-12
申请号：US58549
申请日：1993-05-05
IPC分类号： A01N37/24 , B01J23/42 , C07B61/00 , C07C231/02 , C07C231/10 , C07C231/14 , C07C233/25 , C07C233/60 , C07C269/00
CPC分类号： C07C231/14 , C07C2101/14
摘要： N-acylated p-amino-phenols can be prepared by catalytical hydrogenation of the underlying aromatic nitro compounds in a reaction medium of aqueous sulfuric acid in the sense of a Bamberger type reaction at elevated temperature, optionally in the presence of a water-miscible organic solvent, and subsequent reaction of this reaction mixture with an acid chloride, optionally in the presence of an acid binder and optionally in the presence of a diluent.
摘要翻译： N-酰化的对氨基苯酚可以通过在升高的温度下在Bamberger型反应的含义的硫酸水溶液的反应介质中任选地在水混溶性有机物的存在下催化氢化下面的芳族硝基化合物来制备 溶剂，随后将反应混合物与酰氯反应，任选在酸性粘合剂存在下，任选在稀释剂存在下进行。
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公开(公告)号：US5235087A
公开(公告)日：1993-08-10
申请号：US717948
申请日：1991-06-20
IPC分类号： B01J23/52 , B01J23/62 , B01J23/64 , B01J23/652 , B01J23/89 , B01J27/045 , B01J27/057 , C07B61/00 , C07C68/00 , C07C69/96
CPC分类号： C07C68/00
摘要： Dialkyl carbonates can be prepared by reacting carbon monoxide with alkyl nitrites over a modified platinum metal supported catalyst at an elevated temperature in a continuous gas phase reaction, the reaction being carried out with the exclusion of additional oxidizing substances and, if appropriate, the presence of a lower alcohol.
摘要翻译： 碳酸二烷基酯可以通过在连续气相反应中在升高的温度下使一氧化碳与亚硝酸烷基酯在改性的铂金属负载的催化剂上反应来制备，反应是在排除另外的氧化物质的情况下进行的，并且如果合适的话， 低级酒精。
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公开(公告)号：US5648570A
公开(公告)日：1997-07-15
申请号：US667533
申请日：1996-06-21
IPC分类号： C07B39/00 , C07C17/16 , C07C25/02 , C07C25/08 , C07C25/10 , C07C25/12 , C07C25/125 , C07C25/18 , C07C22/00
CPC分类号： C07C17/16
摘要： Substituted chloroaromatics are obtained in a simple manner in virtually isomer-free form when substituted phenols of the formula (II) ##STR1## where R.sup.1 to R.sup.5 are each, independently of one another, hydrogen, C.sub.1 -C.sub.10 -alkyl, unsubstituted or substituted C.sub.6 -C.sub.10 -aryl or halogen, with at least one of these radicals being different from hydrogen,are reacted with dichlorotriphenylphosphorus.
摘要翻译： 当式（II）的取代的苯酚（II）的取代酚，其中R 1至R 5各自彼此独立地为氢，C 1 -C 10 - 烷基，未被取代的取代的苯基，取代的氯代芳族化合物以几乎无异构体的形式以简单的方式获得。 或这些基团中的至少一个与氢不同的取代的C 6 -C 10 - 芳基或卤素与二氯三苯基磷反应。
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