Maleic anhydride is one of the world's three major anhydride raw materials (acetic anhydride, maleic anhydride, phthalic anhydride), and its downstream products have a wide range of development and application prospects, can be used in synthetic resins, coatings, pesticides, lubricating oil additives, pharmaceuticals, paper treatment agents, food additives, stabilizers and so on.

The process of crystallization separation of p-xylene is still in use now is an older process, before the emergence of adsorption separation technology, crystallization separation of p-xylene is the only technology of p-xylene refining. Due to the development of adsorption technology, the existing crystallization technology for the separation of mixed xylene of equilibrium components has no advantage, but for the separation of mixed xylene materials with high concentration of p-xylene is still attractive.

Ruihua aromatics production technology can be used to produce benzene, toluene, xylene products. This technology is highly adaptable to the market, and the product plan can be adjusted according to demand, making it very competitive in small and medium-sized industrial applications.

Up to now, there are some plants in China that have applied dry gas to ethylbenzene/styrene technology, mainly 6 to 80000 tons of styrene per year, distributed in PetroChina, Sinopec, China Chemical and various private enterprises. The dry gas method was used as raw material to produce ethylbenzene, which solved the problem of dry gas resource utilization at that time. However, in the actual production over the years, the vast majority of dry gas to ethylbenzene/styrene plant load can not reach the design value, not to mention the increase in styrene prices to increase capacity to increase efficiency.

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