Vapor Phase Cross Ketonization of Pivalic Acid with Acetic Acid to Prepare Pinacolone Over Mg-Zr Mixed Oxide Catalysts

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL Catalysis Letters Pub Date : 2024-06-21 DOI:10.1007/s10562-024-04752-5

P. Mahesh Kumar, Y. Nagesh, G. Mallikarjun, N. Lingaiah

{"title":"Vapor Phase Cross Ketonization of Pivalic Acid with Acetic Acid to Prepare Pinacolone Over Mg-Zr Mixed Oxide Catalysts","authors":"P. Mahesh Kumar, Y. Nagesh, G. Mallikarjun, N. Lingaiah","doi":"10.1007/s10562-024-04752-5","DOIUrl":null,"url":null,"abstract":"<div><p>A sequence of MgO-ZrO<sub>2</sub> mixed oxides with varying their ratios were synthesized by adopting co-precipitation method. These catalysts characteristics were deduced from different spectroscopic methods and used for vapor phase cross-ketonization of pivalic acid with acetic acid to produce pinacolone at atmospheric pressure. The characterization results indicated that at a high ZrO<sub>2</sub> molar ratio, Mg<sub>x</sub>Zr<sub>1-x</sub>O<sub>2</sub>-x mixed oxide phase is formed, and it accounted for the presence of strong basic sites. MgO-ZrO<sub>2</sub> mixed oxides ketonization activity is superior to individual oxides and the overall activity mainly depended on their molar ratio, calcination temperature, and presence of mixed oxide phase. The basicity of the MgO-ZrO<sub>2</sub> mixed oxide catalyst is responsible for the high conversion of pivalic acid. The ketonization reaction is carried under different reaction parameters and optimized conditions were established. The catalysts are showed stability during the time on stream analysis.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":null,"pages":null},"PeriodicalIF":2.3000,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Letters","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10562-024-04752-5","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

A sequence of MgO-ZrO₂ mixed oxides with varying their ratios were synthesized by adopting co-precipitation method. These catalysts characteristics were deduced from different spectroscopic methods and used for vapor phase cross-ketonization of pivalic acid with acetic acid to produce pinacolone at atmospheric pressure. The characterization results indicated that at a high ZrO₂ molar ratio, Mg_xZr_1-xO₂-x mixed oxide phase is formed, and it accounted for the presence of strong basic sites. MgO-ZrO₂ mixed oxides ketonization activity is superior to individual oxides and the overall activity mainly depended on their molar ratio, calcination temperature, and presence of mixed oxide phase. The basicity of the MgO-ZrO₂ mixed oxide catalyst is responsible for the high conversion of pivalic acid. The ketonization reaction is carried under different reaction parameters and optimized conditions were established. The catalysts are showed stability during the time on stream analysis.

Graphical Abstract

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

在 Mg-Zr 混合氧化物催化剂上气相交叉酮化特戊酸与乙酸以制备频哪酮

采用共沉淀法合成了一系列不同比例的 MgO-ZrO2 混合氧化物。通过不同的光谱方法推断了这些催化剂的特性，并将其用于在常压下对特戊酸与乙酸进行气相交叉酮化反应，生成频哪酮。表征结果表明，在较高的 ZrO2 摩尔比下，会形成 MgxZr1-xO2-x 混合氧化物相，这也是强碱性位点存在的原因。MgO-ZrO2 混合氧化物的酮化活性优于单个氧化物，整体活性主要取决于它们的摩尔比、煅烧温度和混合氧化物相的存在。MgO-ZrO2 混合氧化物催化剂的碱性是特戊酸高转化率的原因。酮化反应在不同的反应参数下进行，并建立了优化条件。催化剂在流式分析过程中表现出稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.