Separation technology for olefins produced from methanol
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This post was last edited by jordan569 on 2013-1-6 21:03. Recently, I had discussions with experts from the Dalian Institute of Chemical Physics, and I learned that the industrial facilities they are working on are capable of producing alkenes efficiently from methanol. However, they lack practical experience in the technology needed to separate ethylene and propylene from mixtures. I would like to ask those who have such experience: who can help? . Note # ) # # , .
It’s impossible; the facility in Hua County, Shaanxi Province, doesn’t have a separation process, and there are no industrial facilities elsewhere. The products separated from the units of Sinopec Yanshan Petrochemical cannot be polymerized.
I am working on the separation aspect; we are currently using Aspen for the calculations!
From what I remember, polyolefin processes are sensitive to oxygen and oxidized compounds, which makes sense from the perspective of polyolefin catalysts. I wonder if it is because the olefin mixture obtained from MTO contains some oxidized compounds in low concentrations, making them difficult to separate or handle. Additionally, is it possible to address this issue from other angles, such as by developing or improving specialized olefin polymerization catalysts for MTO. Some people have wild ideas, hehe
In my opinion, Aspen doesn’t have much impact on the olefin separation of MTO products
That can’t be right. As a general-purpose software for simulating chemical processes, if one combines their own practical experience with specific processes, uses the simulation software to carry out simulations, and then conducts appropriate verifications, then as long as the key factors are properly addressed and the model is accurate, it should be very useful for scaling up processes as well as improving existing ones. In particular, simulations that rely mainly on physical properties of materials, such as separation, should be easier than those involving chemical reactions. I think the role of software shouldn’t be overemphasized, but it’s also important to use it correctly
Is it true that the products separated from the plants of Sinopec Yanshan Petrochemical cannot be polymerized?
Yanshan Petrochemical has not established a separate separation process either; instead, 1% of MTO gas was added to the separation unit of the existing ethylene plant. However, it is likely that this 1% of gas prevents the separated products from being polymerized, as the traditional separation process is not capable of fully separating certain components within them. This post was last edited by purpleghj on 2007-12-23 14:03]
Whether it is for methanol-to-olefins or methanol-to-oil, since the access policies **prohibit small-scale operations, there’s no need to consider this option any longer; it’s sufficient to adopt the cryogenic process directly, without having to think about other processes. I have just completed the process package for the separation section of Tsinghua University’s fluidized-bed methanol-to-propylene project. I considered several different process routes, and while some of them were viable at the pilot scale, it is still the cryogenic box process that is the most appropriate for scale-up in the future.
Which design firm is responsible for the upper floor? Which company holds the patent for the cryogenic tank process? I haven’t heard of such a process in olefin separation.
Hangyang possesses large-scale ethylene cryogenic tank technology. Hangyang designed and upgraded China’s first capacity-expansion project for a large-scale ethylene cryogenic tank with a capacity of 660 kt/a for Yanhua; this project was part of the **\"Ninth Five-Year Plan\" major technical equipment research and development initiatives. This project passed the **-level appraisal, thereby filling a gap in China’s technology for large-scale ethylene cryogenic tanks.
Should it be called a cryogenic tank process or deep cryogenics? To reach a polymerization grade, olefins must undergo cryogenic processing, and the typical processes include sequential separation processes and pre-deethanization processes; a cryogenic tank process has not been heard of. This post was last edited by purpleghj on 2007-12-23 19:47.]
I need to know what the downstream products of methanol-to-olefins are:lol
Yanshan Petrochemical has added 1% MTO gas to its existing ethylene separation unit. It was previously reported that this 1% of gas prevented the separated products from being polymerized; now it is said that a solution has been found to enable polymerization. Is this true or not? Please let me know
Some experts say that in Yanshan Petrochemical’s MTO pilot project, 1% of MTO gas was added to the gas stream after methanol conversion to olefins in the existing separation units. Previously, it was reported that this 1% of gas prevented the separated products from being polymerized; however, it is now said that a solution has been found that allows for polymerization
Cold box process? Question: Does the person on floor 9 mean MTP (Methanol-to-Propylene project) and not MTO?
Does any friend know the progress of the Datang International coal-to-olefins project? Please share some information
The coal-based olefins project of Shenhua Ningmei Group officially commenced construction in November 2005. It is currently the largest project in the world that uses coal as raw material, employing Germany’s Lurgi company’s advanced gasification technology to produce methanol, and a coal-based olefins process to produce propylene, with polypropylene as the final product. The designed capacity of this large-scale coal chemical complex is to produce methanol (1.67 million tons per year) using gasification syngas as raw material; this methanol is then used to produce propylene (474,000 tons per year) as the main product, while high-octane gasoline (185,000 tons per year), liquefied gas (41,000 tons per year), and sulfur (14,000 tons per year) are also produced as by-products. The key technologies and production equipment are at the world’s leading level. :Has L started construction??????????????????
According to previous estimates, the composition of MTO products is ethylene, propylene, and butylene. If that’s all, separation is no problem; ASPEN or other simulation software can be used. Cold box technology can also solve it. However, the degradation of MTO catalysts occurs rapidly; what are the products in the middle and later stages? No one has announced it, not even UOP. This catalyst has not withstood mid- to late-stage testing. Once oxidized compounds are present, the separation process becomes complicated, and simulation software may not be able to solve the problem. This is what is known as an engineering issue; unexpected problems arise when scaling up the tests. This is also why some research results succeed smoothly in pilot, pilot-scale, and industrial trials, but encounter problems once they reach the demonstration plant.
Shanghai Huisheng Engineering Company is capable of carrying out MTO, MTP, and the separation of olefin mixtures in ethylene cracking units – they do this very well!
I want to know what the metrics are required to meet the aggregate level standards