工业萘简介萘是最简单的稠环芳烃，化学式为C10H8，是由2个苯环共用2个相邻碳原子稠合而成，广泛用作制备染料、树脂、溶剂等的原料，也用作驱虫剂。

　　Introduction to Industrial Naphthalene Naphthalene Naphthalene is the simplest polycyclic aromatic hydrocarbon, with the chemical formula C10H8. It is composed of two adjacent carbon atoms fused together by two benzene rings. It is widely used as a raw material for the preparation of dyes, resins, solvents, and also as an insect repellent.

　　化学性质

　　chemical property

　　氧化反应：温和氧化剂得醌，强烈氧化剂得酸酐。

　　Oxidation reaction: Mild oxidants yield quinones, while strong oxidants yield anhydrides.

　　禁环比们链更易氧化，所以不能用侧链氧化法制萘甲酸。电子云密度高的环易被氧化

　　The banned chain is more prone to oxidation, so side chain oxidation cannot be used to produce naphthoic acid. Rings with high electron cloud density are prone to oxidation

　　还原反应：萘可与5个氢气加成生成十氢化禁

　　Reduction reaction: Naphthalene can react with 5 hydrogen gases to form decahydroxides

　　亲电取代反应：禁的a-位比B-位更易发生亲电取代反应。a-位取代两个共振式都有完整的苯环。β-位取代只有一个共振式有完整的举环。

　　Electrophilic substitution reaction: The forbidden a-site is more prone to electrophilic substitution reaction than the B-site. There is a complete benzene ring for both resonance formulas substituted by A-site. The β - substitution has only one resonant form with a complete ring.

　　用途

　　purpose

　　生产染料和颜料；工业精萘是制造染料和颜料的重要原料，如制造靛蓝染料、黄色颜料；制造农药：工业精萘可以用于制造农药，如苯酚菊酯等；制造塑料和橡胶工业装可以作为塑料和橡胶的增塑剂和防老剂；制造烟草产品工业萘被广泛应用于烟草制品中，以增加烟草的香；制造药品：工业精萘可以用于制造药品，如制造对乙酰氨基酚等危害侵入途径:吸入、食入、经皮吸收。

　　Production of dyes and pigments; Industrial refined naphthalene is an important raw material for manufacturing dyes and pigments, such as indigo dye and yellow pigment; Manufacturing pesticides: Industrial refined naphthalene can be used to manufacture pesticides such as pyrethroids; Manufacturing plastic and rubber industrial equipment can serve as plasticizers and anti-aging agents for plastics and rubber; Industrial naphthalene is widely used in tobacco products to enhance the aroma of tobacco; Manufacturing drugs: Industrial refined naphthalene can be used to manufacture drugs, such as acetaminophen, and other harmful invasion routes: inhalation, ingestion, transdermal absorption.

　　危害：

　　harm:

　　健康危害:具有刺激作用，高浓度致溶血性贫血及肝、肾损害，会导致贫血或红细胞数、血色素和血细胞数显著减少、严重皮肤病,

　　Health hazards: It has a stimulating effect and can cause hemolytic anemia and liver and kidney damage at high concentrations, leading to anemia or significant reduction in red blood cell count, hemoglobin, and blood cell count, as well as serious skin diseases,

　　急性中毒:吸入高浓度萘蒸气或粉尘时，出现眼及呼吸道刺激、角膜混浊、头痛、恶心、呕吐、食欲减退、腰痛、尿频，

　　Acute poisoning: When inhaling high concentrations of naphthalene vapor or dust, eye and respiratory irritation, corneal opacity, headache, nausea, vomiting, decreased appetite, lower back pain, and frequent urination may occur,

　　慢性中毒:反复接触萘蒸气，可引起头痛、乏力、恶心、呕吐、血液系统损害、白内障、视神经炎、视网膜病变、皮炎，

　　Chronic poisoning: Repeated exposure to naphthalene vapor can cause headaches, fatigue, nausea, vomiting, blood system damage, cataracts, optic neuritis, retinopathy, dermatitis,

　　进出口数据分析近几年来，我国工业萘进口量远高于出口量。由于国内萘法苯酐产能不断增长，工业萘市场缺口较大，且国内工业萘市场价格偏高，工业萘出口量呈现出大幅下降态势。

　　In recent years, the import and export data analysis shows that the import volume of industrial naphthalene in China is much higher than the export volume. Due to the continuous growth of domestic naphthalene phthalic anhydride production capacity, there is a large gap in the industrial naphthalene market, and the domestic industrial naphthalene market price is relatively high, resulting in a significant decline in the export volume of industrial naphthalene.

　　价格分析近年来，随着上游原材料价格的上涨、下游需求持续好转，工业萘价格也呈波浪线式稳定上升。自2021年年初由3388元/吨上涨至2023年6月底5068元/吨，价格累计上涨1680元/吨，涨幅为49.6%。

　　In recent years, with the rise of upstream raw material prices and the continuous improvement of downstream demand, the price of industrial naphthalene has also shown a wave like stable increase. From the beginning of 2021, the price increased from 3388 yuan/ton to 5068 yuan/ton by the end of June 2023, with a cumulative increase of 1680 yuan/ton, or 49.6%.

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