Title
Les phyllosilicates de sodium dlamins: Nouveaux supports catalytiques acides (Omn.Pres.Franc.) (French Edition),Used
Delivery time: 8-12 business days (International)
En industrie ptrolire, lamlioration du craquage des hydrocarbures ncessite des centres acides forts, et les zolithes sont de ce point de vue de meilleurs catalyseurs du craquage catalytique que les autres aluminosilicates. Cependant le craquage dune molcule encombrante est encore gn par la petite taille poreuse des cavits zolitiques. Un peu plus tard, lorsque les matriaux MCM41 ont t dcouverts, beaucoup d'espoir a t plac dans leur utilisation en tant que catalyseurs de craquage, parce que leur grande taille de pore pourrait permettre le craquage des molcules volumineuses. Cependant, il est rapidement devenu clair que leur acidit est plus proche dune silicealumine amorphe que des zolithes. Dans cet ouvrage, nous prsentons des nouveaux matriaux alternatifs dvelopps partir de la dlamination des silicates lamellaires naturelles du type magadiite et knyaite. Ces nouveaux matriaux prsentent en mme temps les avantages des zolithes et ceux des MCM41 en jouissant dune haute surface spcifique, d'une acidit leve, et d'une porosit ouverte.
By changing our most important processes and
products, we have already made a big leap forward. This ranges from the
increased use of more sustainable fibers to the use of more
environmentally friendly printing processes to the development of
efficient waste management in our value chain.
Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.
Secure Payment
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
We accept payments with :
Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.