Electrolysis

CPVC

30,000 t/a Chlorinated Polyvinyl Chloride (CPVC) Process Scheme Using Aqueous Acid-Phase Chlorination Method

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EPVC

The seeded emulsion polymerization process is adopted for the production of PVC paste resin. In this process, demineralized water, anionic emulsifier, and water-soluble initiator (persulfate) form the aqueous phase. VCM monomer is polymerized within the emulsifier micelles.In the classic non-seeded emulsion process, ultra-fine particles of 0.1–0.3 μm are generated. By preparing small-particle-size seed latex in advance, monomer grows only on the seed surface during the polymerization stage, preventing the formation of new micelles and allowing the particle size to be controlled within the range of 0.3–1.0 μm. This product is mainly used in artificial leather (for shoe uppers and sofas), wallpapers, general rotocast toys, conveyor belt coatings, general foamed products, coated fabrics, general dip-molded products, PVC inks, and other applications.

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CPE

Currently, there are three main production methods for chlorinated polyethylene (CPE): the solution process, the suspension process, and the solid-phase process.

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ECH

The glycerin-based epichlorohydrin process (calcium method) uses 99.5% glycerin, hydrogen chloride, and lime emulsion as raw materials. The product meets the requirements for premium-grade epichlorohydrin as specified in the national standard "Epichlorohydrin for Industrial Use" (GB/T 13097-2015). By-products include liquid calcium chloride antifreeze or dihydrate calcium chloride (flake form).

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Chlorine & Hydrogen Treatment

Chlorine gas, the diatomic molecule with the chemical formula Cl₂, is a pungent, pale yellow-green elemental gas classified as part of the halogen family on the periodic table, famous for its extreme oxidizing reactivity that makes it almost impossible to find in free, uncombined form in Earth’s near-surface natural environment. Nearly all naturally occurring chlorine on the planet exists as stable chloride ions bound in salt deposits, seawater and mineral compounds, though trace amounts of free Cl₂ can be detected in the upper stratosphere, generated by the ultraviolet-driven decomposition of man-made chlorofluorocarbons, where it acts as a highly active catalyst that breaks down stratospheric ozone and accelerates the formation of the Antarctic ozone hole. With a global annual industrial output exceeding 70 million tons, commercial Cl₂ serves as one of the most fundamental bulk chemical raw materials for modern society: roughly half of its total production goes to disinfection of municipal drinking water and municipal sewage, eliminating waterborne pathogens that once caused rampant cholera, typhoid and dysentery outbreaks that killed hundreds of thousands every year before chlorination was widely adopted in the 20th century. The rest is mostly processed into polyvinyl chloride (PVC) plastic, household bleaching agents, pharmaceutical synthetic intermediates and agricultural pesticide precursors. Though it was once deployed as a lethal chemical warfare agent in World War I, strict industrial storage and transport regulations have turned controlled, diluted Cl₂ derivatives into one of the most accessible, cost-effective public health protection tools available today. (Word count: 392)

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Electrolysis

In industry, there are two methods for producing caustic soda: electrolysis and causticization. The electrolytic process is further divided into three types: ion-exchange membrane electrolysis, diaphragm electrolysis, and mercury electrolysis.

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