{"id":1844,"date":"2026-09-21T08:00:00","date_gmt":"2026-09-21T00:00:00","guid":{"rendered":"https:\/\/bastone-petrochem.com\/?p=1844"},"modified":"2026-09-21T19:06:33","modified_gmt":"2026-09-21T11:06:33","slug":"what-is-dmds","status":"publish","type":"post","link":"https:\/\/bastone-petrochem.com\/es\/what-is-dmds\/","title":{"rendered":"Qu\u00e9 es el DMDS"},"content":{"rendered":"<p class=\"wp-block-paragraph\">DMDS es disulfuro de dimetilo, CH3SSCH3 \u2014 un l\u00edquido organosulfurado de incoloro a amarillo p\u00e1lido con un fuerte olor a ajo, CAS 624-92-0, comprado por refiner\u00edas y plantas petrochemicas como portador de azufre.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Contiene 68 % de azufre en masa y lo libera como sulfuro de hidr\u00f3geno cuando se calienta con hidr\u00f3geno sobre un catalizador.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"853\" src=\"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/09\/image-3-1024x853.png\" alt=\"\" class=\"wp-image-1866\" srcset=\"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/09\/image-3-1024x853.png 1024w, https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/09\/image-3-300x250.png 300w, https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/09\/image-3-768x640.png 768w, https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/09\/image-3-14x12.png 14w, https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/09\/image-3-600x500.png 600w, https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/09\/image-3.png 1374w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Propiedades e identificadores del DMDS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">El DMDS se identifica por el CAS 624-92-0 y se transporta bajo UN 2381, y se comporta como un l\u00edquido denso, poco soluble en agua, que hierve justo por encima de 100 \u00b0C y tiene un punto de inflamaci\u00f3n por debajo de la temperatura ambiente.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Propiedad<\/th><th>Valor<\/th><\/tr><\/thead><tbody><tr><td>N\u00famero CAS<\/td><td>624-92-0<\/td><\/tr><tr><td>N\u00famero CE<\/td><td>210-871-0<\/td><\/tr><tr><td>N\u00famero UN<\/td><td>2381 (clase 3, riesgo subsidiario 6.1, grupo de embalaje II)<\/td><\/tr><tr><td>F\u00f3rmula<\/td><td>C2H6S2 (CH3SSCH3)<\/td><\/tr><tr><td>Masa molecular<\/td><td>94.2<\/td><\/tr><tr><td>Apariencia<\/td><td>L\u00edquido de incoloro a amarillo p\u00e1lido<\/td><\/tr><tr><td>Olor<\/td><td>Caracter\u00edstico a ajo \/ cebolla<\/td><\/tr><tr><td>Punto de ebullici\u00f3n<\/td><td>109\u2013110 \u00b0C<\/td><\/tr><tr><td>Punto de fusi\u00f3n<\/td><td>\u221285 \u00b0C<\/td><\/tr><tr><td>Densidad relativa (agua = 1)<\/td><td>1,06 a 20 \u00b0C<\/td><\/tr><tr><td>Solubilidad en agua<\/td><td>2,5 g\/L a 20 \u00b0C (pobre)<\/td><\/tr><tr><td>Presi\u00f3n de vapor<\/td><td>3,8 kPa a 25 \u00b0C<\/td><\/tr><tr><td>Densidad de vapor relativa (aire = 1)<\/td><td>3.2<\/td><\/tr><tr><td>Punto de inflamaci\u00f3n<\/td><td>10 \u00b0C vaso cerrado (ICSC 1586); 24 \u00b0C vaso cerrado (HSDB)<\/td><\/tr><tr><td>Temperatura de autoignici\u00f3n<\/td><td>&gt; 300 \u00b0C<\/td><\/tr><tr><td>L\u00edmites de explosividad en aire<\/td><td>1,1\u201316 vol %<\/td><\/tr><tr><td>Contenido de azufre<\/td><td>68,1 % en masa<\/td><\/tr><tr><td>Umbral olfativo<\/td><td>0,00078\u20130,0036 ppm<\/td><\/tr><tr><td>L\u00edmite de exposici\u00f3n ocupacional<\/td><td>0,5 ppm, TWA de 8 horas, notaci\u00f3n cut\u00e1nea<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Para qu\u00e9 se utiliza el DMDS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">El DMDS se utiliza industrialmente como portador de azufre: el <a href=\"https:\/\/bastone-petrochem.com\/es\/product-category\/petroleum-refining-chemical\/\">agente sulfurante<\/a> que convierte un catalizador de hidrotratamiento fresco a su forma activa, y la fuente de azufre dosificada en hornos petrochemicos para reducir las operaciones de decoquizaci\u00f3n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fuera de las unidades de proceso sirve como intermedio en qu\u00edmica fina y como anticorrosivo en metalurgia. Est\u00e1 registrado en EE. UU. como fumigante de suelo de preplantaci\u00f3n que, coaplicado con cloropicrina, se espera que sirva como sustituto del bromuro de metilo. Aparte de ese registro, est\u00e1 listado como sustancia aromatizante alimentaria y como ingrediente de fragancia.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Sulfuraci\u00f3n de catalizadores de refiner\u00eda<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La sulfuraci\u00f3n convierte los \u00f3xidos met\u00e1licos de un catalizador de hidroprocesamiento fresco en los sulfuros que son su estado activo, y el DMDS es el agente dosificado en la alimentaci\u00f3n de arranque para suministrar el azufre. Los hidrotratadores e hidrocraqueadores son las unidades habituales; la deshidrogenaci\u00f3n de propano co-alimenta DMDS con un prop\u00f3sito diferente, para mantener la coquizaci\u00f3n baja en el catalizador de Pt\u2013Sn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La descomposici\u00f3n sobre el catalizador comienza entre 160 y 190 \u00b0C, y la inyecci\u00f3n normalmente comienza una vez que la entrada del reactor alcanza los 180 \u00b0C. La conversi\u00f3n completa llega m\u00e1s tarde y depende de la presi\u00f3n, la velocidad espacial y el tipo de catalizador; el relato de un refinador la sit\u00faa por encima de 460\u2013500 \u00b0F.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La cantidad de pedido proviene de la carga de catalizador. Un catalizador de hidroprocesamiento capta 5\u201313 % en masa % de azufre durante la activaci\u00f3n dependiendo de su carga met\u00e1lica; dividir el azufre requerido por el contenido de azufre del agente da el tonelaje. Topsoe dimensiona con 67,2 % en masa %, por lo que 100 t de catalizador con 10 % en masa % de captaci\u00f3n requieren aproximadamente 14,9 t de DMDS, y el manual recomienda mantener un 15 % de exceso en el sitio \u2014 25 % cuando la activaci\u00f3n funciona con gas de una sola pasada.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Anti-coquizaci\u00f3n en craqueadores de vapor<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">En un horno de etileno el DMDS se dosifica continuamente en la alimentaci\u00f3n o en el vapor de diluci\u00f3n, donde el H2S que libera sulfuriza la superficie de la bobina y suprime la formaci\u00f3n de mon\u00f3xido de carbono. La pr\u00e1ctica industrial es un paso inicial de sulfuraci\u00f3n seguido de una adici\u00f3n continua durante la corrida.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/biblio.ugent.be\/publication\/8678377\">Un ensayo publicado<\/a> sobre etano en condiciones de craqueo midi\u00f3 que el DMDS continuo aumentaba las velocidades de coquizaci\u00f3n aproximadamente siete veces en aleaciones sin aluminio, mientras que la formaci\u00f3n de \u00f3xidos de carbono cay\u00f3 por un factor de cinco; sus autores a\u00fan concluyen que el uso industrial no puede evitarse, debido a los \u00f3xidos de carbono m\u00e1s que al coque. En alimentaciones pesadas como la nafta el DMDS s\u00ed act\u00faa como inhibidor de coque, por lo que el resultado con etano no se traslada a toda la gama de alimentaciones.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La dosis tiene un \u00f3ptimo por debajo del habitual industrial. En <a href=\"https:\/\/ojs.kmutnb.ac.th\/index.php\/ijst\/article\/view\/6198\">un estudio<\/a> combinando el craqueo de laboratorio con datos de una planta de etano en funcionamiento, 20 ppmw dieron una tasa de coquizaci\u00f3n 52 % por debajo de la propia dosis de 111 ppmw de la planta, con CO tambi\u00e9n m\u00e1s bajo.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DMDS vs DMS y TBPS<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Los tres son portadores de azufre que se descomponen en H2S, y difieren en cu\u00e1nto azufre entrega una tonelada, con qu\u00e9 facilidad se libera y qu\u00e9 hidrocarburo queda atr\u00e1s. Por masa, el DMDS porta 68,1 % de azufre, el TBPS 454 alrededor de 54 % y el sulfuro de dimetilo 51,6 %, por lo que un trabajo dimensionado en toneladas de azufre necesita aproximadamente un cuarto m\u00e1s de TBPS que de DMDS.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El TBPS cede su azufre a una temperatura m\u00e1s baja que el DMDS, lo que puede dejar menos mercaptanos sin descomponer en condiciones de sulfuraci\u00f3n. Lo que deja cada uno importa m\u00e1s que la temperatura: el DMDS se descompone principalmente en metano, con metil mercaptano \u2014 soluble en agua, por lo que sigue al agua agria \u2014 cuando la conversi\u00f3n es incompleta, mientras que el TBPS produce isobutano y tert-butil mercaptano, que hierven m\u00e1s alto y permanecen con el l\u00edquido.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La sulfuraci\u00f3n en fase gaseosa requiere DMDS; el TBPS no puede usarse de esa manera. El sulfuro de dimetilo es el compuesto de los tres que tambi\u00e9n aparece en mezclas odorantes de gas natural, lo cual es una raz\u00f3n por la que los dos nombres se confunden.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Especificaci\u00f3n, Envasado y Almacenamiento del DMDS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Una especificaci\u00f3n de DMDS es breve: pureza por GC, agua por Karl Fischer, acidez, color y densidad. El grado comercializado es 99,5 % puro; <a href=\"https:\/\/bastone-petrochem.com\/es\/product\/dimethyl-disulfide%ef%bc%88dmds\/\">nuestro propio DMDS<\/a> se suministra a \u2265 99,5 % en tambores de 200 L o por contenedor ISO.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Los m\u00e9todos en esas l\u00edneas son los generales para cada propiedad \u2014 ASTM E203 para agua por Karl Fischer volum\u00e9trico, D1613 para acidez, D1209 para color platino-cobalto, D4052 para densidad en un medidor digital \u2014 y ning\u00fan m\u00e9todo ASTM o ISO publicado est\u00e1 escrito para un ensayo de pureza de DMDS, por lo que esa l\u00ednea dice simplemente \u201cpor GC\u201d.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En el documento de transporte, el DMDS es UN 2381, clase 3 con un riesgo subsidiario 6.1, grupo de embalaje II. La clasificaci\u00f3n aduanera es segura solo hasta 2930.90, la l\u00ednea residual de seis d\u00edgitos para compuestos organosulfurados; la subdivisi\u00f3n nacional por debajo de eso depende del uso para el que se declaren las mercanc\u00edas, y el arancel de EE. UU. desglosa una l\u00ednea de pesticidas antes de la residual.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El almacenamiento sigue el punto de inflamaci\u00f3n y la toxicidad acu\u00e1tica: a prueba de fuego, contenedores bien cerrados, separados de oxidantes, y en un \u00e1rea sin acceso a desag\u00fce o alcantarillado. Por encima de 10 \u00b0C, la ICSC requiere un sistema cerrado con ventilaci\u00f3n y equipo el\u00e9ctrico a prueba de explosi\u00f3n.<\/p>","protected":false},"excerpt":{"rendered":"<p>DMDS is dimethyl disulfide, CH3SSCH3 \u2014 a colourless to pale-yellow organosulfur liquid with a strong garlic odour, CAS 624-92-0, bought by refineries and petrochemical plants as a sulfur carrier. It holds 68 % sulfur by mass and releases it as hydrogen sulfide when heated with hydrogen over a catalyst. DMDS Properties and Identifiers DMDS is [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":1866,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1844","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What Is DMDS - BASTONE<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bastone-petrochem.com\/es\/what-is-dmds\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Is DMDS - BASTONE\" \/>\n<meta property=\"og:description\" content=\"DMDS is dimethyl disulfide, CH3SSCH3 \u2014 a colourless to pale-yellow organosulfur liquid with a strong garlic odour, CAS 624-92-0, bought by refineries and petrochemical plants as a sulfur carrier. It holds 68 % sulfur by mass and releases it as hydrogen sulfide when heated with hydrogen over a catalyst. 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It holds 68 % sulfur by mass and releases it as hydrogen sulfide when heated with hydrogen over a catalyst. DMDS Properties and Identifiers DMDS is [&hellip;]","og_url":"https:\/\/bastone-petrochem.com\/es\/what-is-dmds\/","og_site_name":"BASTONE","article_published_time":"2026-09-21T00:00:00+00:00","article_modified_time":"2026-09-21T11:06:33+00:00","og_image":[{"width":1024,"height":853,"url":"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/09\/image-3-1024x853.png","type":"image\/png"}],"author":"Stoneexpert","twitter_card":"summary_large_image","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/bastone-petrochem.com\/what-is-dmds\/#article","isPartOf":{"@id":"https:\/\/bastone-petrochem.com\/what-is-dmds\/"},"author":{"name":"Stoneexpert","@id":"https:\/\/bastone-petrochem.com\/#\/schema\/person\/e7ac5c8da49e0875ec220147ea11b63b"},"headline":"What Is DMDS","datePublished":"2026-09-21T00:00:00+00:00","dateModified":"2026-09-21T11:06:33+00:00","mainEntityOfPage":{"@id":"https:\/\/bastone-petrochem.com\/what-is-dmds\/"},"wordCount":951,"publisher":{"@id":"https:\/\/bastone-petrochem.com\/#organization"},"image":{"@id":"https:\/\/bastone-petrochem.com\/what-is-dmds\/#primaryimage"},"thumbnailUrl":"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/09\/image-3.png","articleSection":["Uncategorized"],"inLanguage":"es"},{"@type":"WebPage","@id":"https:\/\/bastone-petrochem.com\/what-is-dmds\/","url":"https:\/\/bastone-petrochem.com\/what-is-dmds\/","name":"\u00bfQu\u00e9 es DMDS - 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