Downstream utilization of mixed butenes

Analysis of the raw materials for 1-butene and its upstream and downstream industrial chains 7.1 Upstream raw materials Currently, 1-butene is primarily obtained from refinery C4 and pyrolysis C4 materials produced from naphtha as raw material. Coal-based olefins have experienced explosive growth over the past five years, and the C4 resources produced as a by-product of coal-based olefins will serve as a new source for 1-butene in the future. 7.2 Downstream Products: The downstream products of 1-butene are still under development and research, and there is great potential for growth in the future. 1. As a copolymerizing monomer for linear low-density polyethylene (LLDPE) in production lines, 1-butene is primarily used as a copolymerizing monomer for LLDPE (including HDPE). Among the world’s LLDPE products, 1-butene is the most commonly used copolymerizing monomer. Currently, 1-butene is also primarily used as a comonomer in the domestic production of LLDPE, with the amount of this comonomer typically ranging from 8% to 10% (by mass). Although other comonomers have been explored for use in the LLDPE production process, the role of 1-butene in this field remains significant. As LLDPE production capacity increases, there is great potential for the further use of 1-butene in this industry. … VI. Production of special solvent oils: 1-butene oligomerization yields C8-C20 isoalkenes, which are then hydrogenated to produce alkanic solvent oils. Alkane solvent oil is a special type of oil that contains no harmful substances such as sulfur or aromatics, and has no odor. It is primarily used as a solvent in paints, insecticides, inks, etc., as a diluent for polyolefin catalysts, as a base oil for low-melting-point lubricants, and it can also be used as a dry cleaning agent. Alkane solvent oils produced through the butene oligomerization and hydrogenation process are essentially free of sulfur, aromatics, and heavy metals; they are highly saturated and have no unpleasant odor. In an era where environmental protection is receiving increasing attention, they hold good market prospects. VII. Production of 1,2-epoxybutane: 1,2-epoxybutane can be used to produce polyols, as well as serving as a precursor for gasoline additives, cosmetics, and ionic surfactants. Currently, Chevron uses epoxymethane as an additive. The production of 1,2-epoxybutane still relies on the chlorohydrin process, in which L-butylene is chlorohydrinated using hypochlorous acid and then epoxidized; the reaction conditions are similar to those used in the propylene chlorohydrin process for the production of epichlorohydrin.