Exxon Chemical Patents, Inc.

Exxonmobil Chemical Patents Inc.

Arco Chemical Technology, L.p.

Other

Hsiang-Ning Sun

Stephen Neil Vaughn

James Richardson Lattner

Keith Holroyd Kuechler

Haven S Kesling, Jr

Michael J Cannarsa

Donald E Hostetler

David C Skouby

Machteld Maria Mertens

John Di-Yi Ou

Marcel J G Janssen

David Ritchie Lumgair

Jar-Lin Kao

Cornelius W M Van Oorschot

Jos Peter Wristers

Roque V Martir

John J Cikut

Wenyih Frank Lai

Shun Chong Fung

Luc R M Martens

Richard B Hall

Robert Scott Smith

Terence A Cooper

William Kuechler

Ron G Searle

Steven J Potlock

John Jr McManus

Cynthia C Ingram

This invention is directed to a molecular sieve composition or a catalyst containing molecular sieve which has a relatively high residual silica index, preferably at least about 1.5. The molecular sieve or catalyst can be made by contacting a template-containing molecular sieve with a silicon containing material having an average kinetic diameter that is larger than the average pore diameter of the sieve or catalyst, and heating to leave residual silica at the sieve or catalyst surface. The molecular sieve or catalyst is particularly effective in making an olefin product from an oxygenate feedstock.

Treatment of molecular sieves with silicon containing compounds

The present invention provides a method for converting a feed containing oxygenates to olefins and comprises the following steps: providing a feed including an oxygenate; contacting the feed in a reactor apparatus with a catalyst including a molecular sieve, the contacting taking place under conditions effective to convert the oxygenate to a product including a light olefin, the conditions including a gas superficial velocity of at least two meters per second at at least one point in the reaction zone; and recirculating a first portion of the catalyst to recontact the feed.

Method for converting oxygenates to olefins

The present invention provides a method for converting a feed containing oxygenates to olefins and comprises the following steps: providing a feed including an oxygenate; contacting the feed in a reactor apparatus with a catalyst including a molecular sieve, the contacting taking place under conditions effective to convert the oxygenate to a product including a light olefin, the conditions including a gas superficial velocity of at least two meters per second at least one point in the reaction zone; and recirculating a first portion of the catalyst to recontact the feed.

A method for converting oxygenates to light olefins. The method comprises contacting, in a reactor, a feedstock comprising oxygenates with a molecular sieve catalyst under conditions effective to convert the feedstock to a product including light olefins and by-products, the contacting causing carbonaceous deposits to form on at least a portion of the molecular sieve catalyst producing deactivated catalyst; removing a portion of the deactivated catalyst from the reactor; regenerating the portion of the deactivated catalyst under conditions effective to remove at least a portion of the carbonaceous deposits from the deactivated catalyst to form an at least partially regenerated catalyst; exposing at least a portion of the at least partially regenerated catalyst to at least a portion of the by-products to selectivate the portion of the at least partially regenerated catalyst to form light olefins; and contacting the selectivated portion of the at least partially regenerated catalyst with the feedstock to form the product.

Method for improving light olefin selectivity in an oxygenate conversion reaction

The present invention provides a method for converting a feed containing oxygenates to olefins and comprises the following steps: providing a feed including an oxygenate; contacting the feed in a reactor apparatus with a catalyst including a molecular sieve, the contacting taking place under conditions effective to convert the oxygenate to a product including a light olefin, the conditions including a gas superficial velocity of at least two meters per second; and recirculating a first portion of the catalyst to recontact the feed.

This invention is directed to a molecular sieve having acid catalyst sites and a method of maintaining the acid catalyst sites of a template-containing silicoaluminophosphate molecular sieve. The method comprises providing a template-containing silicoaluminophosphate molecular sieve and heating the molecular sieve in an oxygen depleted environment under conditions effective to maintain or preserve the number of acid catalyst sites. The heated molecular sieve exhibits at least one peak in the infrared region in a range of from 3630 cm to 3580 cm . Preferably, the heated molecular sieve exhibits a combined peak area in the 3630 cm to 3580 cm range of at least 10% of a total peak area of all peaks in an infrared region between 4000 cm to 3400 cm .

Maintaining acid catalyst sites in SAPO molecular sieves

This invention is directed to a molecular sieve having acid catalyst sites and a method of maintaining the acid catalyst sites of a template-containing silicoaluminophosphate molecular sieve. The method comprises providing a template-containing silicoaluminophosphate molecular sieve and heating the molecular sieve in an oxygen depleted environment under conditions effective to maintain or preserve the number of acid catalyst sites. The heated molecular sieve exhibits at least one peak in the infrared region in a range of from 3630 cm,to 3580 cm,. Preferably, the heated molecular sieve exhibits a combined peak area in the 3630 cm,to 3580 cm,range of at least 10% of a total peak area of all peaks in an infrared region between 4000 cm,to 3400 cm,.

Maintaining acid catalyst sites in sapo molecular sieves

A process comprises contacting an oxygenate feed with a molecular sieve catalyst in the presence of an electromagnetic energy and converting the oxygenate feed to olefins.

Converting oxygenates to olefins in the presence of electromagnetic energy

Disclosed is a method of making an olefin product from an oxygenate feedstock comprising, contacting the feedstock in a reaction zone containing 15 volume percent or less of a catalyst, preferably a catalyst comprising a silicoaluminophosphate molecular sieve. In order to obtain the desired product content, i.e., an olefin product having a low level of by-products, conversion of the feedstock in the 15 volume percent or less reaction zone should be maintained between 80 wt % and 99 wt % at the conditions effective to convert 100 wt % of the feedstock when the reaction zone contains at least 33 volume percent of the catalyst material.

Process for increasing the selectivity of a reaction to convert

The present invention provides a methanol reforming catalyst having the following general formula on a dry basis:

One step conversion of methanol to hydrogen and carbon dioxide

The invention relates to a process for converting oxygenated organic material, to olefins using small pore molecular sieve catalysts. More particularly, the invention relates to a method for converting oxygenated organic material to olefins with improved the olefin yields and decreased yields of methane and other light saturate byproducts. The improved yield slate is achieved by treating the small pore molecular sieve catalyst with a modifier selected from the group consisting of polynuclear aromatic heterocyclic compounds with at least three interconnected ring structures having at least one nitrogen atom as a ring substituent, each ring structure having at least five ring members, decomposed derivatives of said polynuclear aromatic heterocyclic compound, and mixtures thereof.

Oxygenate conversions using modified small pore molecular sieve catalysts

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.

Catalytic conversion of oxygenates to olefins

A method for converting starting material to olefins comprising contacting the starting material with a small pore non-zeolitic molecular sieve catalyst under effective conditions to produce olefins, wherein the non-zeolitic molecular sieve has been prepared in-situ or modified after synthesis by incorporation using an alkaline earth metal compound, wherein the alkaline earth metal ion is selected from the group consisting of strontium, calcium, barium, and mixtures thereof.

Use of alkaline earth metal containing small pore non-zeolitic molecular

The present invention relates to methods for selectively converting oxygenates to light olefins, preferably ethylene and propylene, in which desirable carbonaceous deposits are maintained on a total reaction volume of catalyst by totally regenerating only a portion of the total reaction volume of catalyst and mixing the regenerated portion with the unregenerated total reaction volume of catalyst.

Growing community of inventors

Houston, TX, United States of America

Hsiang-Ning Sun