The issue of C4 recycling in MTO for olefin production from methanol
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This post was last edited by jordan569 on 2013-1-6 at 21:51. Does anyone know how much the recovery rate of ethylene and propylene can be increased using the carbon tetra-reefining technique in combination with methanol-to-olefins processes at present? Including Dalian Institute of Chemical Physics and patent holders such as UOP. Thank you! . Note # ) # # , .
Citing content and data from other articles for reference: \"Yahua Consulting’s research indicates that the main processes for producing olefins from methanol include UOP’s MTO process, the DMTO process developed by the Dalian Institute of Chemical Physics under the Chinese Academy of Sciences, and the SMTO process developed by Sinopec. Among these, it is less likely that Sinopec’s SMTO process will be licensed to others.\" Using the DMTO process from Dalian Institute of Chemical Physics, about 200,000 tons of olefins can be produced from 600,000 tons of methanol. The MTO/OCP combined process jointly developed by TOTAL and UOP enables further improvement in the propylene yield by incorporating an olefin cracking process (OCP). Therefore, 600,000 tons of methanol can produce about 230,000 tons of olefins. With the same methanol consumption, the olefin yield can be increased by 12%. "
This post was last edited by gjpx on 2009-7-7 at 13:39. To date, Dahuaxing Research Institute has completed the laboratory development of the carbon-4 reprocessing technology; laboratory data show a significant increase in yield, which is at the international leading level. Industrial trials are about to begin in order to further improve the DMTO process, with the resulting technology being referred to as DMTO-Ⅱ.
The purpose of 3# gjpx carbon four reprocessing is to produce more low-carbon olefins; specific data on this are not available, and the reaction mechanism is not very clear either. It seems to be a type of reprocessing similar to catalytic cracking.
How much C4 does MTO have? Adding an olefin cracking process (OCP) can increase olefin production by 12%; the olefins referred to here are presumably all olefins with a molecular weight of C2 or higher.
It mainly refers to low-carbon olefins of C2/C3 type; the C4 content is as follows: 600,000 tons of C2/C3 olefins are produced, with 84,000 tons of C4 generated as a by-product
84,000 tons of C4 are produced as a by-product; are these olefins or alkanes?
The 84,000 tons of C4 produced as a byproduct are likely alkanes.
The C4 products are mainly butylene, accounting for 88%, including 1-butene and 2-butene; butane accounts for only 9%. 7# songligang
Consideration is now being given to recovering the butylene product from it; the original plan was to use it directly as fuel.
I have a gentle question: What is C4 recycling technology? As the name suggests, it involves recovering C4 and then cracking it to produce low-carbon olefins, right? Could someone give a brief introduction?