US 2010/0058665 A1 · Method for the production of ethene and synthesis gas in circulating fluidized bed

Abstract

The present invention relates to a method for the production of ethene, CO, and hydrogen in a reactor with a circulating fluidized bed with two independent sections, from feedstocks that contain hydrocarbons with at least 11 carbon atoms or from feedstocks with a high oxygen content, using a catalyst in particulate form. The method teaches that in one of the sections of the reactor, in the absence of oxygen, a catalyst containing a dehydrogenation metal promotes the cracking of the said feedstocks, facilitating the subsequent endothermic reactions. In the other section, the coke is burned with air and the heating of the catalyst is controlled, for the adjustment of the appropriate amount of energy that the heated catalyst will convey to the section in which the endothermic reactions take place. The total ethene yield of the process according to the present invention is approximately 20% by weight in relation to the feedstock.

Claims17

Dependent claims

Method for the production of ethene and synthesis gas in a circulating fluidized bed, characterized by the use of a reactor with two independent sections and with a circulating fluidized bed, which method includes the following stages:

1) the provision of a feedstock of hydrocarbons or of a raw material with a high oxygen content;
2) the promotion of contact between the said feedstock and a catalyst, such that steam-based cracking reactions take place in the first section of the reactor;
3) the separation of the resulting products;
4) the continuous regeneration of the said catalyst in the second section of the reactor, through the burning, with air, of the deposited coke;
5) the reconveyance of the said regenerated catalyst to the first section of the reactor, to restart the process.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/585,214Filed 8 Sep 2009

Priority

BR PI 0804120-09 Sep 2008

Published

11 Mar 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

C01B 3/323
By reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide or air: catalytic reaction of gaseous or…
C01B 3/42
Using catalysts: using moving solid particles, e.g. fluidised bed technique
C01B 2203/0233
Containing a catalytic reforming step: the reforming step being a steam reforming step
C01B 2203/0283
Processes for making hydrogen or synthesis gas: containing a CO-shift step, i.e. a water gas shift step

Method for the production of ethene and synthesis gas in circulating fluidized bed

Life of this patent

Method for the production of ethene and synthesis gas in circulating fluidized bed

Life of this patent

Abstract

Claims17