Method of synthesizing molecular sieves
AssigneeExxon Mobil Chemical Patents Inc.
InventorsGuang Cao, Matu J. Shah
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Abstract
The invention is directed to a method of synthesizing a molecular sieve. In particular, the invention is directed to a method for synthesizing a molecular sieve, especially a silicoaluminophosphate molecular sieve, in the presence of a templating agent and a polymeric base. The invention is also directed to formulating the molecular sieve into a catalyst useful in a process for producing olefin(s), preferably ethylene and/or propylene, from a feedstock, preferably an oxygenate containing feedstock.
Claims37
A method for synthesizing a molecular sieve, the method comprising the steps of:
- (a) forming a reaction mixture comprising:
- at least one templating agent and at least two of the group consisting of a silicon source, a phosphorus source and an aluminum source;
- (b) introducing to the reaction mixture a non-ionic polymeric base;
- and (c) recovering the molecular sieve from the reaction mixture.
A method for synthesizing a molecular sieve, the method comprising the steps of:
- (a) combining at least one templating agent and at least two of the group consisting of a silicon source, a phosphorus source and an aluminum source;
- and (b) adding a non-ionic polymeric base.
A method for synthesizing a molecular sieve, the method comprising the steps of;
- (a) providing a reaction mixture comprising at least one templating agent and at least two of the group consisting of a silicon source, a phosphorus source and an aluminum source;
- and (b) contacting the reaction mixture with a polymeric base selected from the group consisting of polyethylenimine, epichlorohydrin modified polyethylenimine, ethoxylated polyethylenimine, polypropylenimine diamine dendrimers, poly(allylamine), poly(1,2-dihydro-2,2,4-trimethylquinoline), poly(dimethylamine-co-epichlorohydrin-co-ethylenediamine) and mixtures thereof, to form the molecular sieve.
A method for forming a molecular sieve catalyst composition, the method comprising the steps of:
- (a) providing a reaction mixture comprising at least one templating agent and at least two of the group consisting of a silicon source, a phosphorus source and an aluminum source;
- (b) contacting the reaction mixture with a polymeric base selected from the group consisting of polyethylenimine, epichlorohydrin modified polyethylenimine, ethoxylated polyethylenimine, polypropylenimine diamine dendrimers, poly(allylamine), poly(1,2-dihydro-2,2,4-trimethylquinoline), poly(dimethylamine-co-epichlorohydrin-co-ethylenediamine) and mixtures thereof, to form a molecular sieve;
- (c) recovering the molecular sieve from the reaction mixture;
- and (d) contacting the molecular sieve with a matrix material to form a molecular sieve catalyst composition.
A method for synthesizing a molecular sieve, the method comprising the steps of:
- (a) providing a reaction mixture comprising at least one templating agent and at least two of the group consisting of a silicon source, a phosphorus source and an aluminum source;
- and (b) contacting the reaction mixture with a polymeric base of formula:
- (—NHCH2CH2—)m[—N(CH2CH2NH2)CH2CH2—]n,
- wherein m is from 10 to 20,000, and n is from 0 to 2,000, to form the molecular sieve.
A method for forming a molecular sieve catalyst composition, the method comprising the steps of:
- (a) providing a reaction mixture comprising at least one templating agent and at least two of the group consisting of a silicon source, a phosphorus source and an aluminum source;
- (b) contacting the reaction mixture with a polymeric base of formula
- (—NHCH2CH2—)m[—N(CH2CH2NH2)CH2CH2—]n,
- wherein m is from 10 to 20,000, and n is from 0 to 2,000, to form a molecular sieve;
- (c) recovering the molecular sieve from the reaction mixture;
- and (d) contacting the molecular sieve with a matrix material to form a molecular sieve catalyst composition.
Dependencies are inferred from the claim text.