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Crystalline molecular sieve layers and processes for their manufacture
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.
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(English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

A process is described for the manufacture of crystalline molecular sieve layers with good para-xylene over meta-xylene selectivity's good para-xylene permeances and selectivities. The process requires impregnation of the support prior to hydrothermal synthesis using the seeded method and may be undertaken with pre-impregnation masking. The crystalline molecular sieve layer has a selectivity (.alpha..sub.x) for para-xylene over meta-xylene of 2 or greater and a permeance (Q.sub.x) for para-xylene of 3.27.times.10.sup.-8 mole(px)/m.sup.2.s.Pa(px) or greater measured at a temperature of .gtoreq.250.degree. C. and an aromatic hydrocarbon partial pressure of .gtoreq.10.times.10.sup.3 Pa.

National Category
Chemical Process Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-36856Local ID: 4ad5c6a0-ab7c-11db-aeba-000ea68e967bOAI: oai:DiVA.org:ltu-36856DiVA: diva2:1010303
Patent
US US6689195, PCT/EP00/02127, WO00/53297 (2004-02-10)
Note

Godkänd; 2004; 20070124 (bajo)

Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-09-15Bibliographically approved

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