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[Chemical Knowledge]：The nature, use, upstream and downstream raw materials, storage methods of C4 after ether, what does it mean

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Ether Post C4 Properties

Post-ether C4 refers to the C4 hydrocarbon mixture remaining in the production of methyl tert-butyl ether (MTBE). The main components of C4 after ether include butadiene, isobutene, n-butene and a small amount of n-butane. Its main properties are as follows: Post-ether C4 is a colorless liquid with a typical hydrocarbon odor. It has a wide range of boiling points, depending on the proportions of the specific components. The chemical properties of C4 after ether are active, especially butadiene and isobutylene, which are prone to polymerization and addition reactions. These properties make it necessary to take special care during storage and transportation to prevent unwanted chemical reactions from occurring.

Post-ether C4 Uses

Ether after C4 has a wide range of uses, mainly concentrated in the following aspects. C4 after ether is one of the important sources of butadiene, which is the key raw material for the production of synthetic rubber (such as butadiene rubber and styrene butadiene rubber). The isobutylene in the post-ether C4 can be used to produce polyisobutylene (PIB) and butyl rubber, which have important applications in the manufacture of automotive tires. C4 after ether can also be used for the production of methyl tert-butyl ether (MTBE) process cycle, to further improve the efficiency of resource utilization. Ether post-C4 is also used as a fuel additive to increase the octane number of gasoline.

Ether C4 upstream and downstream feedstock

The production of post-ether C4's relies on multiple feedstocks upstream. The main raw material is liquefied petroleum gas (LPG), which contains a large amount of C4 components. These C4 components can be converted to butadiene, isobutylene, and other hydrocarbons by processes such as dehydrogenation or catalytic cracking. Upstream processes also include the production of methyl tertiary butyl ether (MTBE), which produces post-ether C4 as a by-product. Downstream, the main products of C4 after ether include butadiene, isobutylene and other C4 hydrocarbons, which are widely used in synthetic rubber, fuel additives and chemical intermediates.

Ether after C4 storage method

Due to the chemically active nature of C4 after ether, the storage method must be cautious. C4 after ether should be stored in a cool, ventilated and dry place, away from fire and heat sources to prevent fire or explosion accidents. Storage vessels shall be specially designed pressure vessels, usually stainless steel or carbon steel, and shall be regularly checked for tightness and integrity. In order to prevent polymerization of C4 after ether, a small amount of stabilizer (such as hydroquinone) is often added during storage to inhibit the occurrence of polymerization. During transportation, similar protective measures should be taken to ensure transportation safety.

Conclusion

In general, as an important intermediate product in the petrochemical industry, post-ether C4 has a variety of uses and application prospects. Its production relies on upstream petroleum refining and chemical processes, and its products are widely used in synthetic rubber, fuel additives and other fields. In view of its chemically active nature, the storage and transportation of post-ether C4s requires special attention to ensure safe and effective resource utilization. In the future, with the progress of technology and the change of market demand, the application field of C4 after ether is expected to be further expanded, so as to provide new impetus for the development of related industries.

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