Pub Date : 2019-12-30DOI: 10.34098/2078-3949.36.5.3
A. P. Chaile, M. D. R. Holgado
{"title":"VALIDACIÓN PARCIAL DE UN MÉTODO DE DETECCIÓN DE PESTICIDAS ORGANOCLORADOS EN VINAZA, POR CROMATOGRAFÍA DE GASES","authors":"A. P. Chaile, M. D. R. Holgado","doi":"10.34098/2078-3949.36.5.3","DOIUrl":"https://doi.org/10.34098/2078-3949.36.5.3","url":null,"abstract":"","PeriodicalId":21227,"journal":{"name":"Revista Boliviana de Quimica","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75952268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-30DOI: 10.34098/2078-3949.36.5.2
Ronald M. Lara Prado, Dayana M. Capcha Vargas, Yamil Acho Sarzuri, Edgar Cárdenas, G. García, M. Cabrera, N. López
Zeolite H-ZSM-5 is widely applied in the petrochemical industry, such as the synthetic process of methanol to hydrocarbons (methanol to hydrocarbons MTH). ZSM-5 zeolite is currently obtained through reagents and expensive processes, being available only a few cheaper alternative routes. In the present investigation, zeolite HZSM-5 was obtained from natural diatomite, then characterized, and finally tested in the synthetic MTH process. The natural diatomite was treated with sulfuric acid to perform hydrothermal synthesis with tetrapropyl ammonium hydroxide (TPA-OH). As a result, the H-ZSM-5 zeolite obtained had a Si / Al molar ratio of 23, it exhibited high thermal stability and showed Lowry-Brönsted and Lewis acid sites. The application of this zeolite in the MTH reaction showed a methanol conversion of 88%. The products were: dimethyl ether (DME) in 40%, olefins (mostly ethylene and propylene) in 40% and others in 20%. The reaction conditions were: 300 ° C, 1.2Lmetanol/gcath at atmospheric pressure (0.65 bar). The selectivity of the products can be modified in such a way that DME can be Received 10 15 2019 Accepted 12 25 2019 Published 12 3
{"title":"SÍNTESIS DE ZEOLITA ZSM-5 UTILIZANDO DIATOMITA COMO PRECURSOR; SU APLICACIÓN EN EL PROCESO DE METANOL A HIDROCARBUROS (MTH)","authors":"Ronald M. Lara Prado, Dayana M. Capcha Vargas, Yamil Acho Sarzuri, Edgar Cárdenas, G. García, M. Cabrera, N. López","doi":"10.34098/2078-3949.36.5.2","DOIUrl":"https://doi.org/10.34098/2078-3949.36.5.2","url":null,"abstract":"Zeolite H-ZSM-5 is widely applied in the petrochemical industry, such as the synthetic process of methanol to hydrocarbons (methanol to hydrocarbons MTH). ZSM-5 zeolite is currently obtained through reagents and expensive processes, being available only a few cheaper alternative routes. In the present investigation, zeolite HZSM-5 was obtained from natural diatomite, then characterized, and finally tested in the synthetic MTH process. The natural diatomite was treated with sulfuric acid to perform hydrothermal synthesis with tetrapropyl ammonium hydroxide (TPA-OH). As a result, the H-ZSM-5 zeolite obtained had a Si / Al molar ratio of 23, it exhibited high thermal stability and showed Lowry-Brönsted and Lewis acid sites. The application of this zeolite in the MTH reaction showed a methanol conversion of 88%. The products were: dimethyl ether (DME) in 40%, olefins (mostly ethylene and propylene) in 40% and others in 20%. The reaction conditions were: 300 ° C, 1.2Lmetanol/gcath at atmospheric pressure (0.65 bar). The selectivity of the products can be modified in such a way that DME can be Received 10 15 2019 Accepted 12 25 2019 Published 12 3","PeriodicalId":21227,"journal":{"name":"Revista Boliviana de Quimica","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90543954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-30DOI: 10.34098/2078-3949.36.5.4
Germán Belizario Quispe, Javier Capacoila Coila, Edilberto Huaquisto Ramos, Dalmiro A. Cornejo Olarte, H. C. Betancur
The contents of phosphorus, arsenic, aluminum, iron and manganese in the surface waters of the Coata River, tributary of Lake Titicaca, department of Puno, Peru, were measured. The measurements were made at two times of the year: sewer and avenue, and were applied at five strategic points on the Coata River, from the Independence Bridge in the city of Juliaca to its mouth on Lake Titicaca. The inductive coupling plasma (ICP) technique consisting of an ionization source and an optical emission spectrophotometer (OES) was used to determine the Received 10 27 2019 Accepted 12 15 2019 Published 12 3
{"title":"DETERMINACIÓN DEL CONTENIDO DE FÓSFORO Y ARSÉNICO, Y DE OTROS METALES CONTAMINANTES DE LAS AGUAS SUPERFICIALES DEL RÍO COATA, AFLUENTE DEL LAGO TITICACA, PERÚ","authors":"Germán Belizario Quispe, Javier Capacoila Coila, Edilberto Huaquisto Ramos, Dalmiro A. Cornejo Olarte, H. C. Betancur","doi":"10.34098/2078-3949.36.5.4","DOIUrl":"https://doi.org/10.34098/2078-3949.36.5.4","url":null,"abstract":"The contents of phosphorus, arsenic, aluminum, iron and manganese in the surface waters of the Coata River, tributary of Lake Titicaca, department of Puno, Peru, were measured. The measurements were made at two times of the year: sewer and avenue, and were applied at five strategic points on the Coata River, from the Independence Bridge in the city of Juliaca to its mouth on Lake Titicaca. The inductive coupling plasma (ICP) technique consisting of an ionization source and an optical emission spectrophotometer (OES) was used to determine the Received 10 27 2019 Accepted 12 15 2019 Published 12 3","PeriodicalId":21227,"journal":{"name":"Revista Boliviana de Quimica","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83803339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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