Shell Oil Comapny

Other

Pq Corporation

Süd-Chemie Ip Gmbh & Co Kg

Lay Hwa Ong

David Allen Cooper

László Domokos

Ferry Winter

Bart Pelgrim

Sjoerd Alkema

Edward Julius Creyghton

Johannes Lercher

Friedrich Schmidt

Wiebe Sjoerd Kijlstra

Götz Burgfels

Roberta Olindo

Cornelius Ouwehand

Stefan Klingelhöfer

A process for preparing a hydrocarbon conversion catalyst that comprises a specially made silica-alumina composition and a metal or metal compound selected from Group VIB and Group VIII metals. The silica-alumina composition is made by preparing an aqueous mixture containing aluminum sulfate followed by adding alkali metal aluminate to the mixture to enhance the pH to within specified range and then adding aluminum sulfate to the mixture to lower the pH. Then alkali metal silicate is added followed by several other pH swings to provide a mixture containing silica-alumina. The resulting mixture is treated with an alkaline solution to provide a precipitate solid that is recovered to obtain a silica-alumina composition containing of from 30 to 70% wt silica and of from 70 to 30% wt of alumina.

Preparation of catalyst

A process for preparing a hydrocarbon conversion catalyst that comprises a specially made silica-alumina composition and a metal or metal compound selected from Group VIB and Group VIII metals. The silica-alumina composition is made by preparing an aqueous mixture containing aluminum sulfate followed by adding alkali metal aluminate to the mixture to inhance the pH to within specified range and then adding aluminum sulfate to the mixture to lower the pH. Then alkali metal silicate is added followed by several other pH swings to provide a mixture containing silica-alumina. The resulting mixture is treated with an alkaline solution to provide a precipitate solid that is recovered to obtain a silica-alumina composition containing of from 30 to 70% wt silica and of from 70 to 30% wt of alumina.

Disclosed is a process for the preparation of a faujasite zeolite. A starting zeolite of the faujasite structure having a silica to alumina ratio of from 4.5 to 6.5 and an alkali level of less than 1.5% wt is steam calcined to produce an intermediate zeolite. The intermediate zeolite is treated with an acidified solution having specificately defined characteristics.

Faujasite zeolite preparation process

Process for preparing a modified zeolite Y which process comprises subjecting zeolite Y having a silica to alumina molar ratio of at least 10 to calcination at a temperature of from 700 to 1000&#xb0; C. wherein (i) the steam partial pressure is at most 0.06 bar at a temperature of from 700 to 800&#xb0; C., (ii) the steam partial pressure is at most 0.08 bar at a temperature of from 800 to 850&#xb0; C., (iii) the steam partial pressure is at least 0.03 bar at a temperature of from 850 to 900&#xb0; C., and (iv) the steam partial pressure is at least 0.05 bar at a temperature of from 900 to 950&#xb0; C. and (v) the steam partial pressure is at least 0.07 bar at a temperature of from 950 to 1000&#xb0; C., a modified zeolite Y obtainable by such process, zeolite Y having a silica to alumina molar ratio of at least 10, the infrared spectrum of which has a peak at 3700 cmbut substantially no peaks at 3605 and 3670 cmand zeolite Y having a silica to alumina molar ratio of at least 10, which zeolite Y has an acidity as measured by exchange with perdeuterated benzene of at most 20 micromole/gram.

Zeolite Y

The invention relates to a novel catalyst based on zeolite, the production of that catalyst, and the use of the catalyst in a method for producing lower olefins from oxygenates and for oligomerizing olefins. The novel catalyst has a SiO/AlOweight ratio of 2 to 9, a BET surface of 250 to 500 m/g, and an Na content under 200 ppm. The catalyst includes a crystalline alumosilicate zeolite and a binder. The catalyst is characterized in that the ratio of the peak heights of its IR absorption bands v=3610 cm&#xb1;20 cm/v=3680 cm&#xb1;20 cmis greater than 1.8.

Catalyst based on zeolite for producing olefins and for oligomerizing olefins

Growing community of inventors

Amsterdam, Netherlands

Lay Hwa Ong