2 results about "Sec-Butyl acetate" patented technology

This invention belongs to the field of catalyst technology, and provides a dedicated catalyst for the synthesis of sec-butyl acetate, its preparation method, and its application. The invention first mixes water and a dispersant to obtain an aqueous phase. A functional monomer, a porogen, and an initiator are then added sequentially to the aqueous phase to carry out a polymerization reaction, yielding a prepolymer. The prepolymer is then mixed with a sulfonating agent and subjected to a sulfonation reaction to obtain a sulfonated resin. Finally, the sulfonated resin is mixed with a solvent and subjected to heat treatment to obtain the catalyst. The functional monomer includes a first monomer, a second monomer, and a crosslinking monomer. The second monomer includes at least one selected from butyl acrylate, butyl methacrylate, ethyl acrylate, and 2-ethylhexyl acrylate. This invention significantly reduces the catalyst's adsorption and reactivity to polycarbonate hydrocarbons, extends the catalyst's lifespan, and improves the selectivity of the catalyst for the synthesis of sec-butyl acetate.

This application relates to the field of marine-drifted polystyrene foam remediation technology, specifically disclosing a composite solvent and method for dissolving marine-drifted polystyrene foam. The composite solvent comprises the following components by mass percentage: 70%–79% main solvent, 12%–20% demulsifier, 6%–9% water-soluble shielding salt additive, and 1%–3% amphiphilic encapsulating agent; the main solvent is a mixture of sec-butyl acetate and isoamyl 2-methylbutyrate. The main solvent rapidly dissolves polystyrene, the demulsifier prevents the main solvent from emulsifying upon contact with water, the shielding salt additive complexes salt ions and enters the aqueous phase to prevent salt ions from mixing into the polystyrene, and the encapsulating agent encapsulates solid impurities and enters the aqueous phase to prevent solid impurities from mixing into the polystyrene. The synergistic effect of the four components allows the composite solvent to directly treat marine-drifted polystyrene foam with high water and high salt content, and the recycled material meets product performance requirements.