无码一区二区波多野结衣播放搜索,人人摸人人舔,婷婷丁香五月天图片,国产黃色a片三

歡迎您進入濟南聚大邦成化工有限公司官方網站! 在線留言 聯(lián)系我們

服務咨詢熱線

13583111587

熱門關鍵詞: 精萘 精萘廠家 甲酸

公司新聞

首頁>>新聞資訊>>公司新聞國內精萘已實現工業(yè)化生產的主要方法
聯(lián)系我們
濟南聚大邦成化工有限公司

聯(lián)系人:張總

電話:13583111587

網址:cdjdhxt.cn

地址:濟南市天橋區(qū)新材料市場南區(qū)7-1-1

國內精萘已實現工業(yè)化生產的主要方法

來源:http://cdjdhxt.cn/ 日期:2023-07-11 發(fā)布人:admin
萘是煤焦油中含量高的雙環(huán)化合物,是有機合成工業(yè)中重要的原料之一,是生產活性染料、酸性染料、直接染料、炸藥、H-酸、β-萘酚、苯酐等精細化工產品必需原料。目前國內大部分焦化廠只生產工業(yè)萘或壓榨萘,以此為原料生產的產品,雜質較多,給分離精制增加困難。因此精萘十分緊缺,一直供不應求。
Naphthalene is a bicyclic compound with high content in Coal tar. It is one of the important raw materials in the organic synthesis industry. It is used to produce Reactive dye, acid dyes, direct dyes, explosives, H-acid β- Essential raw materials for fine chemical products such as naphthol and phthalic anhydride. At present, most coking plants in China only produce industrial naphthalene or pressed naphthalene. The products produced from this raw material have many impurities, which increases the difficulty of separation and refining. Therefore, refined naphthalene is very scarce and has been in short supply.
目前,國內精萘已實現工業(yè)化生產的主要有區(qū)域熔融法、分步熔融結晶(箱法)及化學法等。下面精萘廠家為您分析:
At present, the main industrial production methods for refined naphthalene in China include regional melting method, step-by-step melting crystallization (box method), and chemical method. The following refined naphthalene manufacturers will analyze for you:
區(qū)域熔融工藝的特點是:精萘純度高、處理量大,基本上沒有環(huán)境污染。但是,技術復雜、設備一次投資相當大。精萘機的操作條件控制要求相當嚴格。各段溫度梯度控制精度要求在05℃以內。目前采用該技術常由電腦控制系統(tǒng)。相應地操作人員的技術素質要求很高,操作程序不易掌握。
The characteristics of regional melting process are: high purity of refined naphthalene, large processing capacity, and basically no environmental pollution. However, the technology is complex and the one-time investment in equipment is considerable. The operating conditions control requirements of the naphthalene refining machine are quite strict. The temperature gradient control accuracy of each section is required to be within 05 ℃. Currently, this technology is often controlled by a computer system. Correspondingly, the technical quality requirements of operators are high, and the operating procedures are not easy to master.
精萘廠家
熔融分步結晶法初為法國Proabd公司專利,六十年代先后在英國和捷克建廠投入生產。但此后未在國際上進一步推廣。其主要原因是設備龐大,操作周期長。
The melting step crystallization method was initially patented by Proabd Company in France and was put into production in the UK and Czech Republic in the 1960s. But it has not been further promoted internationally since then. The main reason is that the equipment is large and the operation cycle is long.
化學法萘精制工藝已生產多年,面臨淘汰。主要原因是工藝流程太長,萘的回收率較低。僅洗滌過程中,純萘的損失量約5%。生產需要較大量的濃硫酸和燒堿,而且一般不能回收利用,所以,環(huán)境污染嚴重,工人操作條件比較惡劣,設備腐蝕嚴重,生產成本較高。
The chemical naphthalene refining process has been in production for many years and is facing elimination. The main reason is that the process flow is too long and the recovery rate of naphthalene is low. During the washing process alone, the loss of pure naphthalene is about 5%. Production requires a large amount of concentrated sulfuric acid and caustic soda, and generally cannot be recycled. Therefore, environmental pollution is severe, workers' operating conditions are relatively poor, equipment corrosion is severe, and production costs are high.
本發(fā)明的目的是提供一種足以克服上述缺點的溶劑結晶法制取精萘工藝,它設備簡單,操作容易,周期短,產品質量穩(wěn)定,無環(huán)境污染。
The purpose of the present invention is to provide a solvent crystallization process for preparing refined naphthalene that is sufficient to overcome the aforementioned drawbacks. The process has simple equipment, easy operation, short cycle, stable product quality, and no environmental pollution.
1.一種溶劑結晶法制取精萘工藝,其特征是所用原料為萘渣或焦油渣,蒸餾截取210~230℃時的餾分,也可直接采用工業(yè)萘或水萘,將回收的餾分或工業(yè)萘、水萘置入反應釜內,再加入有機溶劑,其用量與原料用量的重量比為2.5~3.5∶1,加溫至70~80℃,使全部原料溶解,然后逐漸降溫至30~15℃,重新結晶,再進入離心機分離,將分離出的溶劑回收再用,分離出的精萘干燥后即成產品。
1. A solvent crystallization process for producing refined naphthalene, characterized in that the raw material used is naphthalene residue or tar residue, and the distillate at 210~230 ℃ is cut off by distillation. Industrial naphthalene or water naphthalene can also be directly used. The recovered fraction, industrial naphthalene, and water naphthalene are placed in a reactor, and then organic solvents are added. The weight ratio of the amount to the amount of raw materials is 2.5~3.5:1. The process is heated to 70~80 ℃ to dissolve all the raw materials, and then gradually cooled to 30~15 ℃, Recrystallize and then enter a centrifuge for separation. The separated solvent is recycled and reused, and the separated naphthalene is dried to form the product.
國內精萘已實現工業(yè)化生產的主要方法相關內容就講解到這里了,希望能夠給您好的幫助,更多事項就來我們網站http://cdjdhxt.cn咨詢吧!
That's all for the main methods of industrialized production of refined naphthalene in China. We hope to provide you with good help. For more information, please come to our website http://cdjdhxt.cn Consult!
此文關鍵詞:精萘廠家 

推薦閱讀/ Recommended reading

在化工產業(yè)的龐大體系中,精萘作為一種重要的有機化工原料,猶如一顆閃耀的明星,為眾多下游產品的生產提供著不可或缺的基礎支撐。精萘廠家則是這一領域的核心推動者,它們憑借先進的生產技術...

精萘生產要注意哪些操作? 2025-02-25
精萘在室內如何安全儲存 2025-02-15
精萘的用戶群體是哪些? 2025-02-13
精萘在農藥領域有哪些應用? 2025-02-10

魯公網安備 37010502001241號

亚洲熟妇无码爱V在线观看野外 | 久久国内精品自在自线观看| 国产成人aa免费视频| 国产三级国产精品国产普男人| md传媒官方| 国产乱码精品一区二区三上| 免费一级欧洲在线观看| 美女道具一二三区| 色五月激情综合深爱| 激情爆乳一区二区三区| 一本一道久久久a久久久精品91| 无码呻吟A V| www.日本aav.com| 亚洲成人免费日韩| 《麻豆网站入口》| 国产又爽又大又黄| 欧美午夜精品一区二区三区电影| 人人人人人精品| 日韩三级一区二区| 蜜桃超碰| 91久久夜色精品国产网站| 女小孩毛片| 丁月丁香免费久久综合| 91人妻一区二区| 伊人久久大线影院首页动漫| 无码人妻蜜肉动漫中文字幕| 那种视频你懂得| 678五月丁香在线亚洲综合网| sm免费国产调教视频在线观看| 特级毛片看视频| 色久悠悠视频在线| 亚洲国产中文精品之一线久久 | 免费无码专区毛片高潮喷| 色五月婷婷夜夜| 精品久久久久久中文字幕无码专区| 精品中文字幕久久久人妻| 大宁县| 色噜噜久久综合| 国产色视频一区| 日韩丝袜美腿视频网址| av综合色国产|