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    Home > Coatings News > Paints and Coatings Market > Neopentyl glycol

    Neopentyl glycol

    • Last Update: 2020-03-05
    • Source: Internet
    • Author: User
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    Neopentyl glycol (neopentyl glycol) I Introduction to neopentyl glycol product name: neopentyl glycol (Neo, or NPG) product English Name: neopentyl glycol; 22-dimethyl-13-propanediol chemical name: 22-dimethyl-13-propanediol formula: C5H12O2 molecular weight: 104.15 CAS No.: 126-30-7 physical and chemical properties: white crystalline solid, odorless, hygroscopic Melting point 124-130 ℃ Boiling point 210 ℃ Density (21 ℃) 1.06g/cm3 Flash point 129 ℃ The spontaneous ignition point is 399 ℃ The sublimation temperature is 210 ℃ Soluble in water, lower alcohols, lower ketones, ethers and aromatic compounds Toxicity protection: low toxicity LD50 ≥ 6400mg / kg The oral LD50 of mice was 3200-6400mg / kg It is less irritating to the skin However, a large amount of drinking will stimulate the central nervous system, causing vomiting, fatigue, lethargy, dyspnea, tremor, kidney congestion and bleeding, fatty liver disease, urinary closure, bronchitis and pneumonia, and even death Product uses: mainly used in the production of unsaturated polyester resin, polyester powder coating, oil-free alkyd resin, polyurethane foam, that is, plasticizers of elastomers, synthetic plasticizers, surfactants, insulating materials, printing inks, inhibitors, synthetic aviation lubricants, oil additives In addition, it is also applied in the pharmaceutical industry At the same time, neopentyl glycol is a good solvent, which can be used for the selective separation of aromatics and naphthenic hydrocarbons Quality standard: Hg / t2309-92 packaging, storage and transportation: solid state is packed in bags, inner layer is plastic bag, outer layer is woven bag, 25kg / bag The liquid is packed in galvanized iron barrel, 25kg / barrel Store in a cool and ventilated place, sun proof, heat proof and moisture-proof Store and transport according to the regulations of general chemicals 2 Three production schools of neopentyl glycol 1 Internationally, there are three main schools of neopentyl glycol production, among which the disproportionation process (methanol process) is unique to China The domestic producers of neopentyl glycol are basically in a tripartite situation, roughly divided into three groups: hydrogenation process: Jihua BASF Disproportionation process (methanol process): the methanol process represented by Shandong Chemical Research Institute, which is the latest disproportionation improvement process Disproportionation process (water-soluble process): the water-soluble process represented by fufengbaisuo 2 Features: (1) the hydrogenation process has the advantages of short process, high yield, high purity and low cost Disadvantages: large investment in hydrogenation process, high requirements for external environment and high product price At present, there are many NPGS in domestic market, such as BSF Korean LG, Mitsubishi, Eastman, etc Among them, BASF and LG of South Korea have a fierce competition in neopentyl glycol market (2) the disproportionation process (methanol process) overcomes the shortcomings of large investment, the quality is far above the national standard, and the product price is low, and the cost performance is relatively high in many industries Disadvantages: compared with hydrogenation process, the purity is low Sodium formate in this process is a bright spot The color is pure white, the impurity is little, the dry basis content is more than 99%, and it is not easy to agglomerate, the quality is better than the synthesis method and the by-product of pentaerythritol In the international market, the sodium formate of this process is unique (3) the investment of disproportionation process (water-soluble method) is also small, the quality is similar to that of methanol method, but it is easier to agglomerate The by-product sodium formate is quite different from the methanol method, with dark gray or gray color and low purity Its main selling point is that neopentyl glycol can be extracted from it.
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