- Synthesis method of 2,6-di-tert-butyl-4-methylcyclohexanol compound
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The invention discloses a synthetic method of a 2,6-di-tert-butyl-4-methylcyclohexanol compound, and belongs to the technical field of chemical products. The synthetic method specifically comprises the steps: adding ethyl acetate and 2,6-di-tert-butyl-4-methylphenol into an autoclave, and stirring for 15 min at normal temperature until the ethyl acetate and the 2,6-di-tert-butyl-4-methylphenol arecompletely dissolved; then adding palladium on carbon and potassium tert-butoxide, sealing the autoclave, replacing with nitrogen, and introducing hydrogen; carrying out hydrogenation reaction underthe conditions that the temperature is 80-100 DEG C and the hydrogen pressure is 0.2-0.4 MPa, and stopping hydrogenation when hydrogen is not absorbed in the autoclave; discharging and filtering palladium carbon; adding a diluted hydrochloric acid solution, adjusting to be neutral, and removing lower-layer water; distilling the supernatant liquid until all ethyl acetate is distilled out, so as toobtain colorless and transparent 2,6-di-tert-butyl-4-methylcyclohexanol liquid. According to the method, the 2,6-di-tert-butyl-4-methylcyclohexanol is directly obtained through hydrogenation at low temperature and pressure, and the method is suitable for industrial production.
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Paragraph 0017-0028
(2020/07/15)
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- Method of preparing 2,6-di-tert-butyl-4-methylcyclohexanol through continuous catalysis
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The invention discloses a method of preparing 2,6-di-tert-butyl-4-methylcyclohexanol through continuous catalysis: a supported metal catalyst is respectively packed in two fixed bed reactors in tandem; preheated di-tert-butyl-4-methylphenol (BHT) is conti
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Paragraph 0020; 0021; 0022; 0023; 0024; 0025; 0026
(2019/05/15)
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- Method of preparing 2,6-di-tert-butyl-4-methylcyclohexanol through catalytic hydrogenation
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The invention discloses a method of preparing 2,6-di-tert-butyl-4-methylcyclohexanol through catalytic hydrogenation. Di-tert-butyl-4-methylphenol (BHT) and a supported catalyst are fed into a high pressure reaction kettle; after the reaction is finished,
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Paragraph 0021-0028
(2019/05/15)
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- Reaction process for preparing 2,6-di-tert-butyl-4-methylcyclohexanol
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The invention provides a reaction process for preparing 2,6-di-tert-butyl-4-methylcyclohexanol. A fixed bed reactor is adopted to be filled with two types of different hydrogenation catalysts, and 2,6-di-tert-butyl-4-methylphenol is adopted as a raw material to synthesize the 2,6-di-tert-butyl-4-methylcyclohexanol through one step. The conversion rate of the 2,6-di-tert-butyl-4-methylphenol reaches up to 99% or above, and the selectivity of the 2,6-di-tert-butyl-4-methylcyclohexanol reaches up to 98% or above; and the reaction condition is mild, the reaction selectivity is high, continuity canbe realized, and the reaction steps are simple.
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Paragraph 0019-0025
(2019/12/25)
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- Upgrading of aromatic compounds in bio-oil over ultrathin graphene encapsulated Ru nanoparticles
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Fast pyrolysis of biomass for bio-oil production is a direct route to renewable liquid fuels, but raw bio-oil must be upgraded in order to remove easily polymerized compounds (such as phenols and furfurals). Herein, a synthesis strategy for graphene encapsulated Ru nanoparticles (NPs) on carbon sheets (denoted as Ru@G-CS) and their excellent performance for the upgrading of raw bio-oil were reported. Ru@G-CS composites were prepared via the direct pyrolysis of mixed glucose, melamine and RuCl3 at varied temperatures (500-800 °C). Characterization indicated that very fine Ru NPs (2.5 ± 1.0 nm) that were encapsulated within 1-2 layered N-doped graphene were fabricated on N-doped carbon sheets (CS) in Ru@G-CS-700 (pyrolysis at 700 °C). And the Ru@G-CS-700 composite was highly active and stable for hydrogenation of unstable components in bio-oil (31 samples including phenols, furfurals and aromatics) even in aqueous media under mild conditions. This work provides a new protocol to the utilization of biomass, especially for the upgrading of bio-oil.
- Shi, Juanjuan,Zhao, Mengsi,Wang, Yingyu,Fu, Jie,Lu, Xiuyang,Hou, Zhaoyin
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supporting information
p. 5842 - 5848
(2016/05/24)
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- Catalytic hydrogenation of aromatic rings catalyzed by Pd/NiO
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A simple and efficient heterogeneous palladium catalyst was prepared for aromatic ring hydrogenation. The catalyst was prepared by a reduction-deposition method and exhibited high activity and selectivity for the hydrogenation of a variety of substituted aromatic compounds to the corresponding cyclohexane and cyclohexanol derivatives with up to 99% yields. The catalyst was characterized by BET, TEM, XRD, XPS and ICP. Meanwhile the reusability of the catalyst was investigated, and it can be reused for several runs without significant deactivation.
- Wang, Yanan,Cui, Xinjiang,Deng, Youquan,Shi, Feng
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p. 2729 - 2732
(2014/01/06)
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- Cyclohexyloxycarbonylacetohydrazides and method for producing 1H-1,2,4-triazoles using the hydrazides
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There is disclosed cyclohexyloxycarbonylacetohydrazides of formula (I): ???wherein R1represents a hydrogen atom or an alkyl group; R2, R3, R4, R2', R3', and R4', which are the same or different, each represent an alkyl group; R2and R3, and R2' and R3, each may bond together to form a ring; and R5and R6, which are the same or different, each represent a hydrogen atom, a halogen atom, an alkyl group, or an aryl group. The above hydrazides of formula (I) provided are novel compounds useful for producing 1H-1,2,4-triazole derivatives, which latter are synthetic intermediates of physiologically active substances, such as medicines and pesticides, and which latter are also synthetic intermediates of photographic couplers or dyes.
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