Catalytic conversion of oxygenates to olefins
AssigneeExxon Chemical Patents Inc.
InventorHsiang-ning Sun
Life of this patent
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Abstract
A method for preparing a catalyst and the use of such catalyst for converting an oxygenate feed to olefins wherein the catalyst is modified or treated with the aid of electromagnetic energy.
Claims19
A process for converting an oxygenate feed to an olefin product, said process comprising contacting said oxygenate feed with a catalyst containing a modified molecular sieve under conditions effective to convert said oxygenate feed to an olefin product, wherein said modified molecular sieve has been modified by contacting a molecular sieve with a modifying agent and applying electromagnetic energy at a frequency and a power effective to modify said molecular sieve.
A process for converting an oxygenate feed to an olefin product comprising contacting an oxygenate feed with a catalyst under conditions effective to convert said oxygenate feed to an olefin product, wherein said catalyst comprises a modified SAPO molecular sieve wherein said modified SAPO molecular sieve has been modified by contacting a SAPO molecular sieve with a modifying agent in a reaction system and applying electromagnetic energy to the reaction system at a frequency and a power effective to modify said SAPO molecular sieve.
A process for converting an oxygenate feed to an olefin product comprising contacting an oxygenate feed comprising methanol with a catalyst comprising a modified SAPO-34 molecular sieve under conditions effective to produce an olefin product comprising light olefins, wherein said modified SAPO-34 molecular sieve has been modified by treating a SAPO-34 with a modifier comprising an alkaline earth metal ion selected from the group consisting of magnesium ion, calcium ion, strontium ion, barium ion, and mixtures thereof and applying electromagnetic energy at a frequency in the range of from about 10 MHz to about 50,000 MHz and a power in the range of from about 0.01 watt to about 100,000 watts to modify said SAPO-34 molecular sieve.
A method for converting an oxygenate to a product comprising olefins, said method comprising contacting an oxygenate with a modified non-zeolitic molecular sieve under conditions effective to convert the oxygenate to a product;
- said modified non-zeolitic molecular sieve having been modified by contacting a non-zeolitic molecular sieve with a modifying agent and applying electromagnetic energy to modify said non-zeolitic molecular sieve, wherein said oxygenate comprises a compound selected from the group consisting of methanol, dimethyl ether, methylethyl, ether, ethanol, ethyl formate, dimethyl carbonate, and mixtures thereof, said olefins comprise light olefins;
- said non-zeolitic molecular sieve is selected from the group consisting of SAPO-17, SAPO-18, SAPO-34, SAPO-44, and mixtures thereof;
- and said electromagnetic energy is applied at a frequency and a power effective to modify said non-zeolitic molecular sieve.
Dependencies are inferred from the claim text.