{"id":4071,"date":"2024-02-05T05:57:42","date_gmt":"2024-02-05T05:57:42","guid":{"rendered":"https:\/\/longchangchemical.com\/?post_type=product&p=4071"},"modified":"2025-12-17T03:07:58","modified_gmt":"2025-12-17T03:07:58","slug":"fdca-cas-3238-40-2","status":"publish","type":"product","link":"https:\/\/longchangchemical.com\/fr\/product\/fdca-cas-3238-40-2\/","title":{"rendered":"Acide 2,5-furandicarboxylique CAS 3238-40-2"},"content":{"rendered":"

Acide 2,5-furandicarboxylique CAS 3238-40-2<\/strong><\/h1>\n\n\n\n\n\n\n\n\n
Articles<\/td>\nSp\u00e9cifications<\/td>\n<\/tr>\n
Apparence<\/td>\nPoudre blanche<\/td>\n<\/tr>\n
Teneur (HPLC)<\/td>\n\uff1e99.5%<\/td>\n<\/tr>\n
M\u00e9taux lourds\uff08mg\/kg\uff09<\/td>\n\u22642.0<\/td>\n<\/tr>\n
Perte au s\u00e9chage<\/td>\n\u22640.5%<\/td>\n<\/tr>\n
Fr\u00eane<\/td>\n\u22642.0%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Acide 2,5-furandicarboxylique Utilisation<\/strong><\/p>\n

1. Le 5-hydroxym\u00e9thylfurfural est un compos\u00e9 cl\u00e9 pour la d\u00e9rivatisation oxydative de l'acide 2,5-furandicarboxylique (acide 2,5-furandicarboxylique), qui est consid\u00e9r\u00e9 comme une alternative renouvelable et \u00e9cologique \u00e0 l'acide t\u00e9r\u00e9phtalique d\u00e9riv\u00e9 du p\u00e9trole. En outre, la
\n2. L'acide 2,5-furandicarboxylique peut \u00e9galement \u00eatre utilis\u00e9 comme substitut de l'acide isophtalique, de l'acide butanedio\u00efque, du bisph\u00e9nol A, de l'acide adipique, etc. dans la pr\u00e9paration de polym\u00e8res biosourc\u00e9s tels que les polyesters, les polyamides et les r\u00e9sines \u00e9poxy.
\n3. Il peut \u00eatre utilis\u00e9 dans les emballages en plastique biod\u00e9gradable, les plastiques techniques, le nylon, etc.<\/p>\n

Paquet d'acide 2,5-furandicarboxylique<\/strong><\/p>\n

25kg\/tambour.<\/p>\n

Scell\u00e9 et stock\u00e9 dans un environnement frais et sec.<\/p>\n

Contactez-nous d\u00e8s maintenant !<\/b><\/strong><\/h2>\n

Si vous avez besoin de Price, veuillez indiquer vos coordonn\u00e9es dans le formulaire ci-dessous. Nous vous contacterons g\u00e9n\u00e9ralement dans les 24 heures. Vous pouvez \u00e9galement m'envoyer un courriel info@longchangchemical.com<\/a><\/span> pendant les heures de travail ( 8:30 am to 6:00 pm UTC+8 Mon.~Sat. ) ou utilisez le chat en direct du site web pour obtenir une r\u00e9ponse rapide.<\/b><\/strong><\/h4>\n

<\/p>\n

Pourquoi les catalyseurs en poudre sont-ils rarement utilis\u00e9s dans les r\u00e9actions chimiques ?<\/p>\n

1. Limitation du transfert de masse : Les catalyseurs en poudre ont g\u00e9n\u00e9ralement une surface et une structure de pores importantes, con\u00e7ues pour augmenter l'activit\u00e9 des r\u00e9actions catalytiques. Cependant, les mol\u00e9cules r\u00e9actives peuvent rencontrer des limitations de transfert de masse lors de leur entr\u00e9e dans ces pores, ce qui entra\u00eene une vitesse de r\u00e9action limit\u00e9e. En revanche, l'utilisation de catalyseurs ayant d'autres morphologies (par exemple, granulaires ou poreux) peut att\u00e9nuer les limitations du transfert de masse et donc augmenter la vitesse de r\u00e9action.<\/p>\n

2. Probl\u00e8me de chute de pression : les catalyseurs en poudre forment g\u00e9n\u00e9ralement un lit tr\u00e8s serr\u00e9 dans le r\u00e9acteur. Au cours de la r\u00e9action, les r\u00e9actifs traversent la couche de catalyseur, ce qui peut entra\u00eener une chute de pression importante. Cette chute de pression augmente le co\u00fbt d'exploitation du syst\u00e8me et peut n\u00e9cessiter l'entretien et le remplacement du catalyseur apr\u00e8s une longue p\u00e9riode d'exploitation.<\/p>\n

3, Dispersion : Les catalyseurs en poudre sont mal dispers\u00e9s dans le r\u00e9acteur en raison de leur forme granulaire. Une mauvaise dispersion peut entra\u00eener une sous-utilisation de certaines particules de catalyseur, ce qui affecte l'efficacit\u00e9 et la s\u00e9lectivit\u00e9 du produit de la r\u00e9action.<\/p>\n

4. Gestion thermique de la r\u00e9action : Certaines r\u00e9actions catalytiques sont exothermiques et l'utilisation de catalyseurs en poudre peut entra\u00eener une accumulation de chaleur dans le lit catalytique, ce qui complique la gestion thermique de la r\u00e9action. Cela peut entra\u00eener la formation de points chauds et des probl\u00e8mes de contr\u00f4le de la temp\u00e9rature de r\u00e9action.<\/p>\n

Cependant, toutes les situations ne se pr\u00eatent pas \u00e0 l'utilisation de catalyseurs en poudre. Dans certaines conditions de r\u00e9action sp\u00e9cifiques, les catalyseurs en poudre peuvent encore \u00eatre un choix appropri\u00e9. La s\u00e9lection de la forme de catalyseur appropri\u00e9e d\u00e9pend du type sp\u00e9cifique de r\u00e9action, des conditions de r\u00e9action et des exigences en mati\u00e8re de vitesse de r\u00e9action, de s\u00e9lectivit\u00e9 et de transfert de masse. Dans la pratique, les ing\u00e9nieurs chimistes tiendront compte des facteurs susmentionn\u00e9s pour s\u00e9lectionner la forme de catalyseur la plus appropri\u00e9e.<\/p>","protected":false},"excerpt":{"rendered":"

Nom chimique : Acide 2,5-furandicarboxylique<\/p>\n

Num\u00e9ro CAS : 3238-40-2<\/p>\n

Formule mol\u00e9culaire : C6H4O5<\/p>\n

Poids mol\u00e9culaire : 156,09<\/p>\n

Structure mol\u00e9culaire :\"CAS<\/p>\n

Aspect : Poudre blanche<\/p>\n

Densit\u00e9 : 1,7400<\/p>","protected":false},"featured_media":6720,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[69],"product_tag":[],"class_list":{"0":"post-4071","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-catalysts-chemical-auxiliary-agents","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"yoast_head":"\nChina 2,5-Furandicarboxylic acid Manufacturer CAS 3238-40-2 - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"2,5-Furandicarboxylic acid CAS 3238-40-2 is a key product of Longchang Chemical. We provide the best price. 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