One of the most valuable utilization methods for mixed C4 hydrocarbons

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This post was last edited by qq3395442202 on 2016-9-30 at 16:30. Isobutylene is an important basic organic chemical raw material. High-purity isobutylene is primarily used in the production of various organic chemical raw materials and fine chemicals, such as butyl rubber, polyisobutylene, and methacrylates. To date, there are mainly two industrial methods for producing high-purity isobutylene: the MTBE cracking method and the TBA dehydration method. The MTBE cracking method is a process widely adopted by countries around the world since the 1980s. Its drawback is that the etherification method involves numerous side reactions; to obtain high-purity isobutylene products, the separation and purification processes are complex and require significant energy consumption. The tert-butanol (TBA) dehydration method features a simple process, few side reactions, easy separation and purification, high product quality, and low investment costs. The PERP report compares the two processes for producing isobutylene; the tert-butanol (TBA) method is more economical. The main reason why the TBA method has not been widely adopted in China is the lack of inexpensive tert-butanol as a raw material and the low one-way conversion rate of the tert-butanol dehydration reaction. The South Korean company Songwon invested $20 million in its facility in Maeam, South Korea, to produce high-purity isobutylene; the facility has a production capacity of 30,000 tons and came online in the first quarter of 2009. It is the largest facility in the world for the commercial production of isobutylene using tert-butanol as raw material. Another important use of TBA is as a raw material in the MMA production process using the tetra-carbon method. Due to the environmental issues and production capacity limitations associated with the MMA production process using the ACH method, the tetra-carbon method holds great potential in China for MMA production; it has even become a method encouraged for the development of new materials. Several production facilities are currently under construction, which means that the demand for TBA as a raw material is also increasing. However, there are currently no large-scale TBA plants (86% aqueous solution) under construction in the country. Some domestic manufacturers can supply TBA (high concentration) as a by-product of propylene oxide production, but this type of TBA is not suitable as a raw material for producing high-purity isobutylene using the TBA dehydration method ； Even when used as a raw material for the MMA production process via the tetra-carbon method, its cost is higher than that of TBA (86% aqueous solution). Therefore, building a production facility for TBA (86% aqueous solution) will become a promising approach for the rational utilization of C4 resources. It is safe, environmentally friendly, and operates under mild and stable conditions. Using mixed C4 as the raw material, the conversion rate of isobutylene in the feedstock is 85%, while the yield of TBA is greater than 99.9%. There are no by-products generated during the reaction, nor are any waste materials produced (except during startup and shutdown). The investment required is low, and the process is highly mature. I can provide a complete set of process specifications, design details, and production techniques, allowing for immediate ordering and commencement of construction. It would be even better if someone could provide the TBA dehydration technology for producing isobutylene, thereby creating a comprehensive process package. The TBA produced can be sold directly or converted into isobutylene for resale, allowing adjustments based on market conditions.