Cyclohexanone to adipic acid. US3361806A 2022-12-23

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The Industrial Revolution, which took place from the 18th to 19th centuries, was a period of significant economic and social change. It marked a shift from an agrarian and handicraft economy to one dominated by industry and machine manufacturing. While the Industrial Revolution brought about many positive changes, it also had negative impacts on society and the environment.

One positive aspect of the Industrial Revolution was the increase in productivity and efficiency. The use of machinery and the division of labor allowed for goods to be produced more quickly and at a lower cost. This led to an increase in the standard of living for many people, as they were able to purchase more goods and services at lower prices. The Industrial Revolution also created new job opportunities and industries, allowing people to move from rural areas to urban centers in search of work.

Another positive impact of the Industrial Revolution was the development of new transportation and communication systems. The steam engine and the railroad allowed for the rapid movement of goods and people, and the telegraph allowed for faster communication over long distances. These advancements facilitated trade and helped to integrate global markets.

However, the Industrial Revolution also had negative impacts on society and the environment. One negative aspect was the exploitation of labor, as factory owners often paid low wages and provided poor working conditions for their employees. Children and women were often employed in factories, and they often worked long hours in hazardous conditions. The Industrial Revolution also led to the rise of urbanization, as people moved from rural areas to urban centers in search of work. This led to overcrowding and poor living conditions in cities, as there was often a lack of adequate housing and sanitation.

Another negative impact of the Industrial Revolution was the pollution of the environment. The use of coal as an energy source led to air pollution, and the disposal of waste in rivers and streams led to water pollution. The Industrial Revolution also had a negative impact on agriculture, as the demand for factory goods led to the enclosure of land, resulting in the displacement of small farmers.

In conclusion, the Industrial Revolution brought about many positive changes, such as increased productivity and efficiency, the development of new transportation and communication systems, and the creation of new job opportunities and industries. However, it also had negative impacts on society and the environment, including the exploitation of labor, overcrowding and poor living conditions in cities, and pollution of the environment.

US4263453A

cyclohexanone to adipic acid

Device for detecting formation of a second liquid phase US6288270B1 en 1996-06-24 2001-09-11 Rpc Inc. The organic products will contain the desired adipic acid and smaller amounts of glutaric and succinic acids. We prefer to employ cyclic hydroperoxides or cyclic ketones corresponding in carbon structure to the cyclic hydroperoxides and cyclic ketones produced in the reaction. R Chin, PEP abstract: Adipic acid, September 1996. The flask was swirled at frequent intervals for 20 minutes yield depends on how well the reactants are mixed at this stage. As pointed out above, in order to increase the yields of adipic acid in the process defined and claimed in our U.


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环己 的英文翻译(translate 环己 to english)

cyclohexanone to adipic acid

Uses Adipic acid is a very important chemical that is used all over the world to produce various products that people use every day. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list. Chevron USA Inc Original Assignee Gulf Research and Development Co Priority date The priority date is an assumption and is not a legal conclusion. The data obtained are set forth below in Table I. In order to assist in obtaining the high conversions herein, the amount of cobalt present in the reaction mixture is critical and must be in excess of about 25 millimols of cobalt per mol of cyclohexane, preferably in the range of about 50 to about 100 millimols of cobalt per mol of cyclohexane. The product was filtered by vacuum Hirsch funnel and dried. The great majority of the 2 billion kg of adipic acid produced annually is used as monomer for the production ofnylonby apolycondensationreaction with hexamethylene diamineforming 6,6-nylon.

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US4032569A

cyclohexanone to adipic acid

The mixture was then filtered through a large Buchner funnel vacuum into a clean filter flask. Methods of extracting catalyst from a reaction mixture in the oxidation of cyclohexane to adipic acid US6433221B1 en 1998-07-02 2002-08-13 Rpc Inc. US3361806A - Process for oxidizing cyclohexane to adipic acid - Google Patents US3361806A - Process for oxidizing cyclohexane to adipic acid - Google Patents Process for oxidizing cyclohexane to adipic acid Info Publication number US3361806A US3361806A US470912A US47091265A US3361806A US 3361806 A US3361806 A US 3361806A US 470912 A US470912 A US 470912A US 47091265 A US47091265 A US 47091265A US 3361806 A US3361806 A US 3361806A Authority US United States Legal status The legal status is an assumption and is not a legal conclusion. Tomlinson Journal: Environmental Progress, vol 13, No. In the oxidation of cyclohexane with molecular oxygen there is a period of induction before the reaction begins to proceed. Unfortunately, the process of the patent results, generally, in relatively low conversions of cyclohexane to desired product.

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Adipic Acid Production Cyclohexane Reaction, Sample of Essays

cyclohexanone to adipic acid

Thus, either air or oxygen itself can be employed. The second step also can be done by reacting cyclohexanol and cyclohexanone with only air and catalytic amounts Cobalt, copper, and manganese. Methods and devices for controlling hydrocarbon oxidations to respective acids by adjusting the solvent to hydrocarbon ratio US6326455B2 en 1998-02-09 2001-12-04 Rpc Inc. While the addition of even very small amounts of water to the reaction zone at the beginning of the process will be sufficient to obtain an increase in yield of adipic acid, we generally add at least about 0. N 2 O absorbs reflected infrared radiation.

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Preparation OF Adipic ACID FROM Cyclohexene

cyclohexanone to adipic acid

A process for converting cyclohexane to adipic acid in a system consisting essentially of cyclohexane, an aliphatic monobasic acid solvent, cobaltic ions and molecular oxygen, which comprises subjecting cyclohexane to oxidation with oxygen in the presence of cobaltic ions in an aliphatic monobasic acid having only primary and secondary hydrogen atoms and having two to eight carbon atoms, wherein at least about 25 millimols of cobalt are present per mol of cyclohexane, while maintaining a temperature of about 85° to about 105° C. This induction period can vary, for example, from about one half to as high as three hours, or even more. Thus, while in acetic acid these metal ions can profitably be used as acetates, in, for example, chlorobenzene, the insolubility of acetates dictates that the metal ions catalysts be used as napthenates. Accordingly, we can permit the reaction to continue until oxygen absorption ceases. In this way the reaction can continue until no more cyclohexane can be converted. In the present process, because of the presence of added water, reaction time is not critical and no appreciable degradation of adipic acid to glutaric or succinic acid occurs. Methods and devices for controlling hydrocarbon oxidations to respective acids by adjusting the solvent to hydrocarbon ratio US6232495B1 en 1998-02-09 2001-05-15 Rpc Inc.

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US3361806A

cyclohexanone to adipic acid

SUMMARY OF THE INVENTION We have found that in our process defined in our U. Desirably, the conversion is in the range of 10 to 20% and it is preferred to utilize a conversion of approximately 10%. ASSIGNMENT OF ASSIGNORS INTEREST. A spot test was made by withdrawing some of the reaction mixture on the tip of a stirring rod and touching it to a filter paper; permanganate, if present appeared as a purple ring around the dark brown spot of manganese dioxide. So it seems to be of great academic and practical interesting to study and develop highly efficient and environmentally friendly catalytic cyclohexane oxidation processes. This period of induction is believed to occur in order to oxidize the cobaltous ion to the active cobaltic ion and to promote the production of free radicals from the cyclohexane charge.

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cyclohexanone to adipic acid

Methods and replacing water and cyclohexanone with acetic acid in aqueous solutions of catalyst US6235932B1 en 1999-06-18 2001-05-22 Chemintel India Private Ltd. The amount of initiator can vary between about 0. The flask was then rinsed with a second portion of 10 mL of 1% sodium hydroxide solution. This new cyclohexane oxidation procedure is useful for processes in which additional molecular oxygen is used for conversion of these precursors to adipic acid. In general, it is not necessary to utilize more than about 0.

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cyclohexanone to adipic acid

In addition in each of the runs the cobalt salt was introduced in the form of cobaltous acetate tetrahydrate. Process of separating catalyst from oxidation mixtures US6218573B1 en 1998-07-02 2001-04-17 Rpc Inc. . Any disagreements between the various sections of this article probably resulted from this being a group effort. ASSIGNMENT OF ASSIGNORS INTEREST. There are several specific facts about why N 2 O is so bad for the environment. These can readily be separated by extraction with a solvent, such as acetone mentioned above.

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cyclohexanone to adipic acid

Copyright 1998 SRI consulting. Manufacturers of adipic acid are attempting to reduce emmis ions by forming inter-industry groups, which share information, and the use of different technologies. DESCRIPTION OF PREFERRED EMBODIMENTS Example I A series of runs was carried out in which all of the components of a reaction mixture, except molecular oxygen, were added to a one-liter, stirred, 316-stainless steel autoclave. This non-nitric 1 page, 335 words Lab Date: Topic: The reactivity series Problem: Which of the following metals are more reactive with acids - magnesium, zinc, aluminum, iron, lead, and copper? One of those reasons was strategic usage of chemical warfare. Methods for treating cobalt catalyst in oxidation mixtures resulting from oxidation of hydrocarbons to dibasic acids US6235932B1 en 1999-06-18 2001-05-22 Chemintel India Private Ltd. At the end of the reaction period the reaction mixture can be separated into its component parts by any convenient means.

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