{"title":"空气预处理后2-丙醇与杂多酸的反应","authors":"Hideo Orita *, Takashi Hayakawa, Masao Shimizu, Katsuomi Takehira","doi":"10.1016/0166-9834(91)80030-Z","DOIUrl":null,"url":null,"abstract":"<div><p>The reaction of 2-propanol over various phosphorus-containing heteropolyacids was investigated as a function of pretreatment temperature and composition of the heteropolyacids. With catalysts pretreated at 100–300 °C, only propene was produced. However, after pretreatment at 450 °C, the selectivity changed in favor of acetone over some mixed molybdenum and tungsten heteropolyacids. From infrared (IR) and thermogravimetry-differential thermal analysis (TG-DTA) measurements, the improvement in acetone selectivity was ascribed to the destruction of Keggin units of the heteropolyacid. The maximum selectivity to acetone was observed for H<sub>3</sub>PMo<sub>12−<em>x</em></sub>W<sub><em>x</em></sub>O<sub>40</sub> when<em>x</em> = 6.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"77 1","pages":"Pages 133-140"},"PeriodicalIF":0.0000,"publicationDate":"1991-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80030-Z","citationCount":"14","resultStr":"{\"title\":\"Reaction of 2-propanol over heteropolyacids after pretreatment in air\",\"authors\":\"Hideo Orita *, Takashi Hayakawa, Masao Shimizu, Katsuomi Takehira\",\"doi\":\"10.1016/0166-9834(91)80030-Z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The reaction of 2-propanol over various phosphorus-containing heteropolyacids was investigated as a function of pretreatment temperature and composition of the heteropolyacids. With catalysts pretreated at 100–300 °C, only propene was produced. However, after pretreatment at 450 °C, the selectivity changed in favor of acetone over some mixed molybdenum and tungsten heteropolyacids. From infrared (IR) and thermogravimetry-differential thermal analysis (TG-DTA) measurements, the improvement in acetone selectivity was ascribed to the destruction of Keggin units of the heteropolyacid. The maximum selectivity to acetone was observed for H<sub>3</sub>PMo<sub>12−<em>x</em></sub>W<sub><em>x</em></sub>O<sub>40</sub> when<em>x</em> = 6.</p></div>\",\"PeriodicalId\":8091,\"journal\":{\"name\":\"Applied Catalysis\",\"volume\":\"77 1\",\"pages\":\"Pages 133-140\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1991-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0166-9834(91)80030-Z\",\"citationCount\":\"14\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Catalysis\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/016698349180030Z\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Catalysis","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/016698349180030Z","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Reaction of 2-propanol over heteropolyacids after pretreatment in air
The reaction of 2-propanol over various phosphorus-containing heteropolyacids was investigated as a function of pretreatment temperature and composition of the heteropolyacids. With catalysts pretreated at 100–300 °C, only propene was produced. However, after pretreatment at 450 °C, the selectivity changed in favor of acetone over some mixed molybdenum and tungsten heteropolyacids. From infrared (IR) and thermogravimetry-differential thermal analysis (TG-DTA) measurements, the improvement in acetone selectivity was ascribed to the destruction of Keggin units of the heteropolyacid. The maximum selectivity to acetone was observed for H3PMo12−xWxO40 whenx = 6.
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