ISO1127 Sanitary Pipe Fittings Kaysen Steel is a China manufacturer, supplier and exporter for Stainless Steel Sanitary Pipe Fittings, ISO1127 Sanitary Pipe Fittings, ISO1127 Hygienic Fittings, ISO1127 food grade fittings with Welded, Tri-Clamped, Threaded ends, in 3A, DIN, SMS, BS, RTJ, ISO, IDF, DS, INCH standard, SS304 & SS316L material, which is used in Food, milk, beer, brewage, pharmacy, comestic, biopharmacy, etc. Welcome to buy ISO1127 sanitary pipe fittings, ISO1127 Hygienic Fittings, ISO1127 food grade fittings from us in most favorable price, any questions or requests, pls feel free to contact us! ISO1127 Sanitary Pipe Fittings,ISO1127 Sanitary Fittings,ISO1127 Hygienic Fittings,ISO1127 Fittings Kaysen Steel Industry Co., Ltd. , https://www.chinasanitaryvalve.com
Submission:
ISO1127 Sanitary Pipe Fitting Specification:
â–ª Standard:3A, DIN, SMS, BS, RTJ, ISO, IDF, DS, INCH, etc
â–ª Material: Stainless Steel 304 (1.4301), Stainless Steel 316L(1.4404) etc.
▪ Size Range: 1/2″ to 12″ / DN15 ~ DN300
â–ª Connection Type: Welded, Tri-Clamped, Threaded
Surface Finish:
Mechanically polished and electropolished are available for our products.
Tube and Fittings: Ra0.4, Ra0.6, Ra0.8 or specified
Quality & Inspection:
â–ª PMI test to verify material grade
â–ª Dimension controlling during fabricating and finished
â–ª Visual and surface 100% examination before shipment
â–ª Packed in carton box firstly, then in wooden case
Diethyl phthalate (DEP), also known as diethyl orthophthalate or ethyl citrate, is a non-toxic, colorless, and transparent oily liquid commonly used in the plastics industry. It is often combined with dimethyl phthalate and applied in cellulose acetate to enhance water resistance, elasticity, light resistance, and hardness of the final product. DEP can also be used to produce nitrocellulose with high strength, good light resistance, and no odor. In addition to its use in plastics, DEP serves as a tackifier for polyvinyl acetate emulsions, a solvent and lubricant in pharmaceuticals, a fragrance-retaining agent, and a non-toxic adhesive for food packaging films. It is also employed as a foaming agent in mineral flotation, a stationary phase in gas chromatography, an alcohol denaturant, and an insecticide spray. Despite its high volatility, DEP remains widely used in various applications, especially in cellulose acetate and butyrate.
The synthesis of DEP typically involves the esterification of phthalic anhydride with anhydrous ethanol, using p-toluenesulfonic acid as a catalyst and cyclohexane as a water-carrying agent. The reaction mixture is heated and stirred under reflux for approximately 8 hours. After the reaction completes, excess ethanol is removed via atmospheric distillation. The product is then collected through vacuum distillation, yielding about 49.5% of the desired compound. The structure of the synthesized DEP is confirmed using infrared spectroscopy (IR) and refractive index measurements.
Traditional methods of synthesizing DEP often rely on concentrated sulfuric acid as a catalyst, which, while effective, has several drawbacks. These include equipment corrosion, environmental pollution from waste byproducts, and limited selectivity leading to lower yields. To address these issues, solid acid catalysts have been introduced. They offer advantages such as high reactivity, faster reaction times, better selectivity, and the ability to be reused, making the process more sustainable and cost-effective. Common types of solid acid catalysts include molecular sieves, functional polymers, heteropoly acids, and solid superacids.
In summary, the synthesis of DEP is an important process in chemical manufacturing, with ongoing efforts to improve efficiency and reduce environmental impact. By using advanced catalysts like p-toluenesulfonic acid and optimizing reaction conditions, researchers are able to achieve higher yields and purer products, ensuring that DEP continues to play a vital role in industrial applications.
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