Multihydric Compound Dehydration Systems, Catalyst Compositions, and Methods
AssigneeBattelle Momerial Institute
InventorsJames J. Strohm, Alan H. Zacher, James F. White, Michel J. Gray, Vanessa Lebarbier
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Abstract
The present disclosure relates to facilities, systems, methods and/or catalysts for use in chemical production. In particular, the disclosure provides innovations relating to dehydration of multihydric compounds such as glycerol to form acrolein. Some of these innovations include continuous reaction systems as well as system parameters that allow for long term production.
Claims61
A production facility for conducting a chemically synthetic dehydration process, the facility comprising a reaction zone in fluid communication with both a reactant reservoir and a product reservoir, the reaction zone containing a phosphorous-comprising catalyst, and the facility configured to cyclically produce dehydration product and regenerate the reaction zone, the production of the dehydration product comprising exposing reactant from the reactant reservoir to the catalyst within the reaction zone to form the dehydration product at a production rate, and the regenerating the reaction zone comprising returning the reaction zone to produce the dehydration product at a rate of at least 70% of the production rate.
A chemically synthetic dehydration process comprising:
- exposing a multihydric reactant to a dehydration catalyst within a reactor to form a dehydration product;
- ceasing the providing of the reactant to the reactor;
- after ceasing the providing of the reactant, providing a gas to the reactor while maintaining the temperature of the catalyst below 800° C.;
- and
- after providing the gas, again providing reactant to the reactor.
A chemically synthetic dehydration process comprising:
- exposing an aqueous reactant mixture to a dehydration catalyst within a reactor to form a dehydration product, the reactant mixture comprising water and a multihydric reactant;
- ceasing the providing of the multihydric reactant to the reactor;
- after ceasing the providing of the multihydric reactant, providing gaseous water to the reactor;
- and
- again exposing the reactant mixture to the reactor.
A chemically synthetic dehydration process comprising:
- providing glycerol to a reactor having a dehydration catalyst therein, the catalyst transforming at least a portion of glycerol to a dehydration product;
- ceasing the providing of the glycerol to the reactor;
- after ceasing the providing of the glycerol, providing an oxidizing reagent to the reactor while maintaining the temperature of the catalyst below 800° C.;
- and
- after providing the reagent, again providing glycerol to the reactor.
A chemically synthetic dehydration process comprising:
- providing a dehydration catalyst within a reactor;
- providing glycerol to the reactor via a first conduit;
- providing water to the reactor via a second conduit;
- exposing the catalyst to the glycerol to form a dehydration product;
- ceasing the exposing of the catalyst to the glycerol;
- after the ceasing of the exposing of the catalyst to the glycerol, exposing the catalyst to the water, wherein the water is in primarily the gaseous form;
- and
- after exposing the gaseous water to the catalyst, providing glycerol to the reactor to form a dehydration product.
A chemically synthetic dehydration process comprising:
- providing a reactor having a dehydration catalyst bed therein;
- exposing glycerol to the catalyst bed to form a dehydration product from the glycerol;
- forming carbon by-products within the reactor;
- ceasing the providing of the glycerol to the catalyst bed;
- after the ceasing, exposing the reactor to a gas, and heating the contents of the reactor to a temperature sufficient to release at least a portion of the carbon by-products from the reactor;
- and
- after the heating of the contents of the reactor, again providing glycerol to within the reactor.
A glycerol dehydration catalyst comprising:
- a fumed support material;
- phosphate;
- and
- at least one or more metals from groups 2-12 of the periodic table and/or Rb.
A glycerol dehydration method comprising exposing glycerol to a catalyst, the catalyst comprising a fumed support material, phosphate, and at least one or more metals from groups 2-12 of the periodic table or K, Cs, or Rb, the exposing forming one or both of acrolein and acetol.
A glycerol dehydration catalyst regeneration method comprising:
- providing a used glycerol dehydration catalyst, the catalyst comprising a fumed support material, phosphate, and at least one or more metals from groups 2-12 of the periodic table and/or Rb, K, and Cs;
- and
- exposing the used catalyst to either N2 alone and/or air while maintaining a temperature of the catalyst above 200° C. to regenerate the catalyst.
A glycerol dehydration system comprising:
- a reactor coupled to at least two conduits, one of the two conduits configured to convey reactants to the reactor, and the other of the two conduits configured to convey products from the reactor;
- and
- a catalyst within the reactor, the catalyst comprising a fumed support material, phosphate, and at least one or more metals from groups 2-12 of the periodic table and/or Rb, K, and Cs.
A chemically synthetic dehydration process comprising:
- exposing a multihydric reactant to a phosphorous-comprising catalyst within a reactor to form a dehydration product;
- ceasing the providing of the reactant to the reactor;
- and
- after ceasing the providing of the reactant, providing a phosphorous-comprising material to the reactor, the phosphorous-comprising material increasing the amount of phosphorous in the dehydration catalyst;
- and
- after providing the phosphorous-comprising material, again providing reactant to the reactor.
Dependencies are inferred from the claim text.