Solid Acid Catalysts for the Hock Cleavage of Hydroperoxides
نویسندگان
چکیده
The oxidation of cumene and following cleavage hydroperoxide (CHP) with sulfuric acid (Hock rearrangement) is still, by far, the dominant synthetic route to produce phenol. In 2020, global phenol market reached a value 23.3 billion US$ projected compound annual growth rate 3.4% for 2020–2025. From ecological economical viewpoints, key step this process CHP. One sought-after way likewise reduce energy consumption waste production substitute heterogeneous catalysts. Different types zeolites, silicon-based clays, heteropoly acids, ion exchange resins have been investigated tested in various studies. For every type these solid catalysts, several materials were found that show high yield selectivity mini-review, first brief introduction overview on Hock given. Next, mechanism, kinetics, safety aspects are summarized discussed. Following, different catalysts their performance as catalyst illustrated. Finally, approaches briefly concluded short outlook
منابع مشابه
A Facile and Environmental Friendly Method for C=N Bond Cleavage of Imines Using p-Toluenesulfonic Acid in Solid State
A simple, efficient and clean procedure has been developed for the cleavage of imines C=N bond. Deprotection of imines to their parent carbonyl and amine compounds was achieved using p-toluenesulfonic acid in the solid state condition at 25-45 ˚C. The salient features of this methodology are shorter reaction times, cheap processing, high yields of product and easy availability of the catalyst. ...
متن کاملFunctional assessment of the strength of solid acid catalysts
0021-9517/$ see front matter 2009 Elsevier Inc. A doi:10.1016/j.jcat.2009.03.005 * Corresponding author. Fax: +1 510 642 4778. E-mail address: [email protected] (E. Iglesia). We describe here a rigorous method to estimate the deprotonation energy (DPE) and acid strength for solid Brønsted acids with uncertain structure using rate constants for reactions involving cationic transition states. ...
متن کاملPolysulfones: solid organic catalysts for the chemoselective cleavage of methyl-substituted allyl ethers under neutral conditions.
The solid polysulfone made of SO2 and methylidenecyclopentane catalyzes the cleavage of methyl-substituted allyl ethers and liberates the corresponding alcohols.
متن کاملstudy of cohesive devices in the textbook of english for the students of apsychology by rastegarpour
this study investigates the cohesive devices used in the textbook of english for the students of psychology. the research questions and hypotheses in the present study are based on what frequency and distribution of grammatical and lexical cohesive devices are. then, to answer the questions all grammatical and lexical cohesive devices in reading comprehension passages from 6 units of 21units th...
the use of appropriate madm model for ranking the vendors of mci equipments using fuzzy approach
abstract nowadays, the science of decision making has been paid to more attention due to the complexity of the problems of suppliers selection. as known, one of the efficient tools in economic and human resources development is the extension of communication networks in developing countries. so, the proper selection of suppliers of tc equipments is of concern very much. in this study, a ...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Catalysts
سال: 2022
ISSN: ['2073-4344']
DOI: https://doi.org/10.3390/catal12010091