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Does anyone know anything about Danhua Jinmei Chemical Industry? Let me give you an introduction

2008-02-26View Original

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Does anyone know anything about Danhua Jinmei Chemical Industry? Let me introduce it. The 10,000-ton-per-year production of ethylene glycol from syngas, established through a partnership between Danhua Jinmei Chemical Industry and the Fujian Institute of Research on the Structure of Matter under the Chinese Academy of Sciences, involves three main steps: methanol nitrosation to produce nitrites ; Preparation of oxalate esters via the reaction of nitrites with CO ; Hydrogenation of oxalate esters to produce ethylene glycol.   I wonder if any expert here could introduce some of the specific details.
Reply #22008-02-29
In the presence of methyl nitrite, gaseous CO undergoes coupling, regeneration, and catalytic cycles to produce diethyl (methyl) oxalate. Diethyl (methyl) oxalate is then hydrogenated to yield a mixture of ethyl (methyl) glycolic acid and ethylene glycol, and the hydrogenation products are separated by distillation to obtain the final ethylene glycol product. The reaction is a self-closing cyclic process; the reaction conditions are mild, the catalyst exhibits high selectivity and good stability, the quality of the resulting product is excellent, and there is little pollution from waste materials. Its reaction equation is as follows: Coupling reaction: 2CO + 2CH3ONO → (COOCH3)2 + 2NO (1) It uses CO as a raw material, with methyl nitrite acting as a strong oxidizing agent; the reaction takes place at a temperature of 120–140°C under normal pressure. Pd/Al2O3 is used as a catalyst, and under normal conditions, the space-time yield of this catalyst can reach 0.8–1.5 t/m3-cat/h. The reactor is a fixed-bed reactor. Regeneration reaction: 2NO + 2CH3OH + 1/2O2 → 2CH3ONO + H2O (2) This is a gas-liquid reaction; the reactor used is a packed tower. The reaction temperature ranges from 30 to 80°C, it takes place at atmospheric pressure, and no catalyst is required. Reactions (1) and (2) form a cycle, with NO and ethyl (methyl) nitrite as the cyclic substances. The overall reaction for the formation of oxalate esters can be written as: 2CH3OH + 2CO + 1/2O2 → (COOCH3)2 + H2O (3) Diethyl (or dimethyl) oxalate can be further hydrogenated to yield ethyl (or methyl) glycolate or ethylene glycol: (COOCH3)2 + 2H2 → CH2OHCOOCH3 + CH3OH (4) (COOCH3)2 + 4H2 → (CH2OH)2 + CH3OH (5) Excessive hydrogenation results in the formation of ethanol: (CH2OH)2 + H2 → CH3CH2OH + H2O (6) The overall reaction for the production of ethylene glycol from syngas is: 2CO + 1/2O2 + 4H2 → (CH2OH)2 + H2O
Reply #32009-02-24
The progress of the Tongliao Jinmei ethylene glycol project is not going well; it is planned to change it to a 200,000-ton/year acetic anhydride project. It’s not clear whether this is accurate.
Reply #42009-02-24
Tongliao Jinmei Chemical Co., Ltd. (referred to as Jinmei Company) is a joint-stock company established in Tongliao by Shanghai Shenghan Investment Co., Ltd., Shanghai Shengyu Investment Co., Ltd., Jiangsu Danhua Acetic Anhydride Co., Ltd., and Jiangsu Tongsheng Chemical Technology Development Co., Ltd. Jinmei Company serves as an important platform for innovation and industrialization in coal chemical technology, aiming to transform laboratory technologies in this field into practical production techniques that can be utilized on an industrial scale. The technical team at Jinmei Company possesses extensive practical experience and expertise in the field of coal chemical engineering, and has achieved significant breakthroughs in various industrial applications related to coal chemicals (such as the carbonylation process for acetic anhydride production). This has provided strong support for Jinmei Company to make progress in its coal chemical engineering projects ; The shareholder resources of Jinmei Company can work together to ensure the successful industrialization of its operations. For example, the company’s shareholders have established good cooperative relationships with coal production bases, which lays the foundation for securing a stable supply of coal at low costs and high quality for future industrial production. Additionally, these shareholders possess extensive expertise and experience in project investment and project management, and they can provide services such as project management, ongoing project financing, as well as strategic decision-making and industry integration during the process of technological industrialization. 2. Project content and location: The content of this project is to produce ethylene glycol using coal as a raw material through a two-step indirect synthesis process involving carbonylation and hydrogenation, in line with the principles of scientific sustainable development and in accordance with **industrial policy requirements. This approach aims to change the current practice of relying on petroleum for the production of ethylene glycol both internationally and domestically, thereby reducing the dependence of ethylene glycol-based products on petroleum. The process of this project is divided into carbonylation synthesis and ester hydrogenation. The annual operating hours are calculated at 8,000 hours. Construction location: This project is planned to be built within the Economic Development Zone of Tongliao City, Inner Mongolia Autonomous Region. 3. Social and economic significance of the project construction: The total investment for this project is 984,048,000 yuan. After completion, it will generate annual sales revenue of 152,657,140 yuan (including taxes), with an annual after-tax profit of 23,876,220 yuan. The project’s construction period is 18 months, with an investment profit rate of 30.75% and a payback period of 5.53 years (after income tax). This project will possess comprehensive competitive advantages and market profitability that traditional production methods cannot match. Its completion will bring about a historic revolution in the ethylene glycol production process, offering broad prospects for development. It is of great significance for enhancing the profitability of Danhua Jinxin Coal Chemical Co., Ltd., and it will also stimulate the growth of related industries such as logistics and employment in the surrounding area, making important contributions to increasing local tax revenues and fostering local economic development.
Reply #52009-02-25
Kim Mi has already been held back by this project; on one hand, investment is required at high prices, resulting in large costs; On the other hand, the technology is not yet mature, making it difficult to predict and control the risks associated with industrial scale-up ; The impact of the financial crisis has turned expected profits into nothing but illusions!

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