ES2613273T3 - Método de producción de ácido acrílico o sus derivados - Google Patents

Método de producción de ácido acrílico o sus derivados Download PDF

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Publication number
ES2613273T3
ES2613273T3 ES13719331.4T ES13719331T ES2613273T3 ES 2613273 T3 ES2613273 T3 ES 2613273T3 ES 13719331 T ES13719331 T ES 13719331T ES 2613273 T3 ES2613273 T3 ES 2613273T3
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Prior art keywords
derivatives
acrylic acid
catalyst
production method
mixtures
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ES13719331.4T
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Inventor
Juan Esteban VELASQUEZ
Janette Villalobos LINGOES
Dimitris Ioannis Collias
Jane Ellen Godlewski
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Procter and Gamble Co
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Procter and Gamble Co
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    • B01J27/14—Phosphorus; Compounds thereof
    • B01J27/16—Phosphorus; Compounds thereof containing oxygen, i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr
    • B01J27/18—Phosphorus; Compounds thereof containing oxygen, i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr with metals other than Al or Zr
    • B01J27/1802—Salts or mixtures of anhydrides with compounds of other metals than V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, e.g. phosphates, thiophosphates
    • B01J27/1806—Salts or mixtures of anhydrides with compounds of other metals than V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, e.g. phosphates, thiophosphates with alkaline or alkaline earth metals
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    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
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Abstract

Un método para fabricar ácido acrílico, derivados de ácido acrílico, o mezclas de los mismos que comprende poner en contacto una corriente que comprende ácido hidroxipropiónico, derivados de ácido hidroxipropiónico o mezclas de los mismos, con un catalizador que comprende: c. anión monohidrógeno monofosfato descrito por la fórmula (I): [HPO4]2- (I), d. y aniones dihidrógeno monofosfato descritos por la fórmula (II): [H2PO4]- (II), y e. al menos dos cationes diferentes, en donde el catalizador tiene carga neutra; y además, en donde la relación molar de dicho anión monohidrógeno monofosfato con respecto a dicho anión dihidrógeno monofosfato en dicho catalizador es entre 0,1 y 10.

Description

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VI Procedimientos de ensayo
XRD: Los datos de ángulo amplio (WAXS) se registraron en un difractómetro STADI-P en modo de transmisión (Stoe & Cie GmbH, Darmstadt, Alemania). El generador funciona a 40 kV/40 mA, suministrando potencia a un tubo de rayos x de Cu con ánodo de cobre de foco largo y fino. El difractómetro incorpora un monocromador de cristal de germanio curvado para el haz incidente, un sistema de ranura normalizada para el haz incidente, y un detector de imagen sensible a la posición de la placa con un intervalo angular de aproximadamente 124° 2θ. Los datos se recogieron en modo de transmisión. Las muestras se trituraron suavemente a mano usando un mortero y una mano de mortero hasta consistencia de polvo fino, si es necesario, antes de introducirlo en el portamuestras normalizado del instrumento. Las fases cristalinas se identificaron usando la base de datos más actual de difracción en polvo (del ICDD) usando las rutinas Search/Match [Buscar/Emparejar] en Jade (Materials Data, Inc. v9.4.2).
SEM/EDS: El polvo seco se dispersó en una cinta adhesiva de doble cara de cobre o carbono que se había montado sobre un sustrato para microscopio electrónico de barrido (SEM). Cada muestra se revistió con Au/Pd durante aproximadamente 65-80 s usando una cámara de preparación Gatan Alto 2500 Cryo. La cartografía de formación de imágenes SEM y la espectroscopia dispersiva de energía (EDS) se llevaron a cabo en un equipo Hitachi S-4700 FE-SEM
o un equipo Hitachi S-5200 con lente FE-SEM incorporado (Hitachi Ltd., Tokio, Japón) ambos provistos de detectores Bruker XFlash 30 mm2 SDD para EDS (sistema Quantax 2000 con detector 5030; Bruker Corp., Billerica, MA). La cartografía EDS se realizó con una tensión de aceleración de 10 kV en el modo de corriente de sonda de análisis. Todos los mapas se generaron con el programa informático Bruker Esprit V1.9 incluido en el módulo Hypermap.
Reactor: Un tubo de 330 mm (13 pulgadas) de longitud de acero inoxidable revestido con vidrio (SGE Analytical Science Pty Ltd., Ringwood, Australia) con un diámetro interno de (ID) de 4,0 mm se empaquetó con lana de vidrio (76 mm/3 pulgadas de longitud de lecho), se cubrió con catalizador (1,6 cm3 de volumen de lecho, 127 mm/5 pulgadas de longitud de lecho) para obtener un lecho empaquetado de 2,55 cm3 (203 mm/8 pulgadas) y 1,6 cm3 (127 mm/5 pulgadas) de espacio libre en la parte superior del reactor. El tubo se introdujo en un bloque de aluminio que se colocó en un horno en forma de concha de almeja serie 3210 (Applied Test Systems, Butler, PA) de forma que la parte superior del lecho empaquetado estaba alineado con la parte superior del bloque de aluminio. El reactor se configuró en flujo descendente, y se equipó con una bomba de alimentación Knauer Smartline 100 (Berlin, Alemania), un controlador de flujo de gas Brooks 0254 (Hatfield, PA), un regulador de contrapresión Brook, y un depósito de recogida. El horno en forma de concha de almeja se calentó de forma que la temperatura de la pared del reactor se mantuvo constante a aproximadamente 350 °C durante la reacción. El reactor estaba provisto de alimentaciones independientes de líquido y gas que se mezclaban entre sí antes de alcanzar el lecho del catalizador. La alimentación de gas estaba compuesta por nitrógeno molecular (N2) a aproximadamente 2,48 MPa (360 psig) y a un caudal de 45 cm3/min. (45 ml/min.) La alimentación de líquido era una solución acuosa de ácido láctico (20% en peso de ácido Lláctico) y se alimentó a 0,045 cm3/min. (0,045 ml/min). Tras pasar por el reactor, la mezcla gaseosa se enfrió y los líquidos se recogieron en el depósito de recogida para su análisis mediante HPLC fuera de línea con un sistema Agilent 1100 (Santa Clara, CA) provisto de un detector de matriz de diodos (DAD) y una columna Waters Atlantis T3 (n.° de catálogo 186003748; Milford, MA) usando métodos generalmente conocidos por los normalmente expertos en la técnica. La mezcla gaseosa se analizó en línea mediante GC usando un sistema Agilent 7890 (Santa Clara, CA) provisto de un detector FID y una columna Varian CP Para Bond Q (n.°de catálogo CP7351; Santa Clara, CA).
Alimentación del reactor: Una solución (113,6 g) de ácido láctico derivado de biomasa (88% en peso, Purac Corp., Lincolnshire, IL) se disolvió en agua destilada (386,4 g) para proporcionar una solución con una concentración esperada de ácido láctico de 20% en peso. Esta solución se calentó a de 95 °C a 100 °C durante 12 – 30 horas. La mezcla resultante se enfrió y se analizó mediante HPLC (anteriormente descrito) frente a patrones de peso conocido.
VII Resultados
La Tabla 1 resume los parámetros catalíticos obtenidos con los diferentes catalizadores descritos en la Sección V.
Tabla 1
Ejemplo n.°
Tiempo de residencia, (s) Tiempo en Corriente, (min) Conversión LA, (%) Rendimiento AA, (%) Selectividad AA, (%) Rendimiento CO, (%) Rendimiento CO2, (%)
1
1,4 172 93±2 60±2 64±3 4±0 3±1
2
1,2 379 53±3 39±1 73±2 3±0 2±0
3
1,0 328 90±2 76±1 85±1 4±1 3±2
La descripción anterior se proporciona solamente por fines de claridad y comprensión, y no se deben deducir innecesariamente limitaciones de la anterior en el ámbito de la invención que puedan ser evidentes para los expertos en la técnica.
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Claims (1)

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US201313835187 2013-03-15
US13/835,187 US9926256B2 (en) 2012-04-11 2013-03-15 Catalytic conversion of lactic acid to acrylic acid
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ES13719326T Active ES2909406T3 (es) 2012-04-11 2013-04-11 Catalizador para la conversión de ácido láctico en ácido acrílico
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ES13719326T Active ES2909406T3 (es) 2012-04-11 2013-04-11 Catalizador para la conversión de ácido láctico en ácido acrílico
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