A kind of catalyst and its preparation method and application
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A kind of catalyst, alloy catalyst technology, applied in the field of chemical industry
Active Publication Date: 2019-04-02
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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But, above these reaction processes all relate to solvent, and the use of initiator and additive, reaction process can bring processes such as solvent separation
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Embodiment 1
[0094] (1) Catalyst preparation. Use Ti, Zr, Co, La elements with a purity of 99.5% or more, according to Ti 60 Zr 20 co 15 La 5 The atomic ratio composition weighs a certain amount of metal elements, and melts them into alloys in a vacuum electric arc furnace, using argon protection during melting. The resulting alloy has the molecular formula Ti 60 Zr 20 co 15 La 5 . The obtained alloy is mechanically pulverized into particles of about 100-200 mesh as a catalyst for future use.
[0095] (2) Catalyzed oxidation reaction of cyclohexane. The reaction was carried out in a 600ml reactor, and the weight ratio of the catalyst to cyclohexane was 1:800. After feeding, the autoclave was heated to 140°C, filled with air to a pressure of 1.5MPa, and the reaction time was 300min, with constant stirring .
[0096] (3) Separation of reactants. After the reaction finishes, carry out liquid phase and solid phase centrifugal separation, obtain liquid phase product A and solid phas...
Embodiment 2-34
[0110] Catalyst preparation method is the same as embodiment 1, prepares different composition catalysts, and the implementation result of its catalyzed cyclohexane oxidation reaction is shown in Table 2. Wherein the method for product analysis is with embodiment 1.
Embodiment 8
[0112] The cerium-rich mixed rare earth used in Example 8 was purchased from Beijing Haoyun Jinneng Technology Co., Ltd., and the weight percentage (wt%) composition of its main elements is as follows:
[0113] Elemental composition of cerium-rich mischmetal (wt%)
[0114]
[0115] The yttrium-rich mixed rare earth used in Examples 23 and 29 was purchased from Ganzhou Sanxin New Material Technology Co., Ltd., and the weight percentage (wt%) composition of its main elements is as follows:
[0116] Elemental composition of yttrium-rich mixed rare earths (wt%)
[0117]
[0118] Implementation results of different catalysts in table 2
[0119]
[0120]
[0121]
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Abstract
The invention relates to an alloy catalyst and a preparation method and application of catalyst. The alloy catalyst is shown as the formula I, namely TM(100-x)-REX. The alloy catalyst can be used for carrying out catalytic oxidation on cyclohexane to directly generate adipic acid, glutaric acid, succinic acid and KA oil in the presence of oxidizing agents such as air, oxygen gas or oxygen-enriched air, and the main product is adipic acid; the appropriate reaction conditions are as follows: the temperature is 130-150 DEG C and the pressure is 1.0-3.0MPa. The alloy catalyst has the characteristics of good activity, long service life, easiness in separation and the like; the metal alloy catalyst is characterized by being used for carrying out catalytic oxidation on cyclohexane to generate adipic acid, glutaric acid and succinic acid in the presence of air by one step, the reaction process is green and has an energy-saving effect, and the greenhouse gas emission can be reduced.
Description
technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a catalyst and its preparation method and application. The catalyst can be used in the direct oxidation reaction of cyclohexane to prepare dibasic acid. Background technique [0002] Dibasic acids such as adipic acid, glutaric acid and succinic acid are important industrial raw materials, mainly used in the production of engineering plastics, polyurethane foam and plasticizers, such as nylon 66 and nylon 66. In addition, the above-mentioned dibasic acids can also be used in the production of high-grade lubricants, food additives, pharmaceutical intermediates, fragrance and flavor control agents, new single crystal materials, plastic foaming agents, coatings, insecticides, adhesives and dyes, etc. very broad. [0003] The production methods of adipic acid mainly include phenol method, cyclohexane method, cyclohexene method and butadiene method, etc., but the current ...
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