Protecting catalytic sites of activated porous molecular sieves
OwnerMarcel Jansseninventor
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Abstract
Metalloaluminophosphate molecular sieves and metalloaluminophosphate molecular sieve catalyst particles are protecting from degradation by water by maintaining said molecular sieves or catalysts in contact with a vapor and/or liquid mixture of aldehyde and at least 0.1 wt. % water and the activated porous molecular sieve has at least 80% of the pore volume filled with the agent. The metalloaluminophosphate molecular sieves and metalloaluminophosphate molecular sieve catalyst particles which have been protected in such fashion catalyze the conversion of feedstocks to hydrocarbons.
Claims57
A method of maintaining catalytic activity of an activated porous molecular sieve, comprising the step of:
- contacting the activated porous molecular sieve with an agent having at least 55 wt. % aldehyde and at least 0.1 wt. % water, wherein the activated porous molecular sieve has at least 80% of its pore volume filled with the agent.
A method for converting an oxygenate feedstock into a hydrocarbon product in which an activated porous molecular sieve having a methanol uptake index of at least 0.15 is contacted with an oxygenated feedstock under oxygenate to olefins conversion conditions, wherein, prior to contacting the feedstock, the activated porous molecular sieve has been stored in contact with an agent comprising having at least 55 wt. % aldehyde and at least 0.1 wt. % water, wherein the activated porous molecular sieve has at least 80% of its pore volume filled with the agent.
The method of claim 46, wherein the porous metalloaluminophosphate molecular sieve is selected from SAPO-11, SAPO-17, SAPO-18, SAPO-34, SAPO-35, SAPO-37, SAPO-44, SAPO-56, metal containing forms thereof and intergrown forms thereof.
A method of maintaining catalytic activity of an activated porous molecular sieve, comprising the step of:
- contacting the activated porous molecular sieve with an agent for at least 24 hours, wherein said agent has at least 55 wt. % aldehyde and at least 0.1 wt. % water, wherein the activated porous molecular sieve has at least 80% of its pore volume filled with the agent.
A method of maintaining catalytic activity of an activated porous molecular sieve, comprising the step of:
- contacting the activated porous molecular sieve with an agent having at least 80 wt. % protective material and at least 0.1 wt. % water, wherein the protective material comprises at least 20 wt. % aldehyde, 0 to 40 wt. % alcohol, and a component having at least one of C1 to C12 hydrocarbons, and any combination thereof, wherein the activated porous molecular sieve has at least 80% of its pore volume filled with the agent.
Dependencies are inferred from the claim text.