1,4 Butanediol Manufacturer in China

What is 1,4-butanediol?


1,4-Butanediol, referred to as BDO, has no obvious characteristics at normal room temperature. It is hygroscopic, can be fully dissolved in water, and can be fused with methanol, etc., and can be well fused with ether. This raw material has specific properties. Melting point, when the temperature conditions reach the standard, it will move closer to the oil, but the color will not change. When the temperature is lower than the melting point, it will crystallize into needles.

1.4 BDO for sale


The Application of 1,4-butanediol


1,4-Butanediol plays an important role in the field of chemical industry at home and abroad. It is a very valuable organic refined raw material and an essential raw material for many chemical products. The current market demand continues to increase. This raw material can be applied through a variety of changes to produce new raw materials with different properties. Therefore, it is often used as raw materials or auxiliary materials, and has a wide range of applications. It can be used in the agricultural sector and can also be used as cosmetics and other products. of production.


At the same time, it is also widely used in the fields of automobiles and daily chemicals. Therefore, it is necessary to conduct research and analysis on the productivity and production process of 1,4-butanediol, hoping to improve the market competitiveness of 1,4-butanediol. During the production and application process, its potential performance should be continued to be explored and improved. The level of production technology.

The production process of 1,4-butanediol


Propylene oxide production method


In the production process, the catalyst used in the propylene oxide process can be reused many times in the later stage, that is, the production process is simple and easy to operate, and at the same time it does not have too high costs, and in the production process
No more waste will be produced. While reducing steam consumption, it can ensure the production efficiency of 1,4-butanediol, effectively alleviate production complexities, and adapt to the changing requirements of the market. Therefore, if you want to produce 1,4-butanediol on a large scale, epoxy Propane production is a better choice. Production through this process will gain greater advantages in terms of competitiveness. However, it should be noted that the propylene oxide production process also has certain disadvantages. The raw materials used are lithium phosphate and other raw materials. , this material requires certain conditions for transportation and storage, thus causing many transportation and storage problems. In the process of related production, it is necessary to use other types of materials for auxiliary catalysis, but many materials themselves are dangerous and even toxic. When affected by external conditions such as heating or high pressure during the production process, they may be thermally decomposed It forms toxic crotonaldehyde gas, so the raw material must be transported with caution, and scientific and reasonable transportation and storage methods must be adopted to reduce the toxicity of the intermediate products and avoid harm to the human body.


Butadiene production method


The butadiene production method is divided into two processes, one is the chlorination process and the other is the acetic acid process.
(1) In the production process, 1,4-butanediol can be produced through chlorination technology. After regulating the external environment, butadiene is first chlorinated to obtain the corresponding 1,4-dichloro-2 -Butene product, the product is further processed, and hydrogen is added in the final step to generate 1,4-butanediol.
(2) If you choose to prepare through a catalytic process, the material used for the reaction will have a greater impact on the reactants. Generally, palladium-tellurium, etc. are used, and operations such as hydrogen and distillation are also used. , and then get the final product. During the production process, 1,4-diacetoxy-2-butene is catalytically treated with palladium, and the required raw materials are obtained after adding hydrogen. In the later stage, sulfur-type cations are used to exchange with the resin to produce a catalytic effect, and when incorporated into water, a hydrolysis reaction occurs to generate 1,4-butanediol. In the production process, butadiene is used to prepare 1,4-butanediol. During the production process, the reaction produced by the raw material is relatively gentle and gentle. At the same time, there are many types of raw materials that can be produced. During the production process, the exhaust gas Less waste is generated and the raw material conversion rate is higher. However, the use of this technology for production is highly corrosive to production equipment. At the same time, steam consumption continues to rise. At the same time, the cost of catalysts and palladium-tellurium required is relatively high. Therefore, the production cost of this production process is relatively high. , will affect the economic benefits of the product.

Maleic anhydride production method


It can be produced in two ways, one is through esterification and hydrogenation, and the other is the direct hydrogenation method: (1) When using the esterification and hydrogenation preparation process, ethanol needs to be separated through a series of reactions.
It is decomposed to obtain the corresponding product, and then the impurities are removed through distillation and excess water is removed. To obtain 1,4-butanediol through this method, attention must be paid to the later purification work. (2) If it is carried out without going through intermediate links,
To produce it, the raw material must be catalyzed by nickel-rhenium, followed by secondary treatment through liquid-phase hydrogenation of maleic anhydride. After obtaining γ-butyrolactone and then operating with hydrogen, 1,4-butanediol will be generated. Esterification and hydrogenation technology is applied in the production process. The cost of the important raw material catalyst is low, so the production cost is effectively reduced. At the same time, this catalyst material can be used for a long time. This method has low requirements on the external environment and can also It produces a higher conversion rate and produces a wide variety of derivative products; the use of hydrogenation technology in the production process does not require purification procedures such as dehydration, thus greatly improving the production efficiency of 1,4-butanediol. Reduce the process flow.

Alkylenic aldehyde production method


In the production process, acetylenic aldehyde production and preparation methods are used. First, methanol needs to be treated to form formaldehyde, and then acetylene and formaldehyde are reacted to form butynediol, which is then hydrogenated to produce 1,4-butanediol.
alcohol. This production process has certain risks and can easily cause explosions and other accidents, because polyacetylene materials can easily cause pipeline blockage during the production process, causing certain production safety hazards and affecting
The production efficiency and production lead time of the product have deteriorated. Therefore, this production process is gradually being replaced by other production methods with higher production efficiency.
Many companies have upgraded and improved the acetylenic aldehyde production process. By reorganizing the slurry reactor, the acetylenic aldehyde reaction space has been broadened, and the copper material has been improved to cause a catalytic reaction with the material, and the reaction has been reduced through secondary precipitation and soaking. The conditions are upgraded and optimized, which greatly improves the safety of this production process and improves the production efficiency of the product. Incorporate improved palladium carbon catalyst into the material,
Under a certain pressure and temperature, the raw material hydrogen is added to perform a catalytic reaction to form butene diol. At the same time, nickel is used to undergo a catalytic reaction process at a set temperature, and the generated 1,4-butanediol is separated after separation. Processing can ensure that the produced 1,4-butanediol maintains the purity necessary for production. At the same time, the improved acetylenal production process has been promoted and popularized around the world. At the same time, the production capacity formed accounts for more than half of the world’s production capacity and nearly 60% of the total number of this raw material in my country. Xinjiang Meike The currently developed process for producing 1,4-butanediol acetylenal is generally relatively stable. It uses 1,4-butanediol basic copper carbonate with higher performance to form a catalyst through a specific process, which has higher performance and stability. The quality and production process level have reached international standards.

Technical progress of 1,4-butanediol


Domestic production technology progress


A set of processes for the preparation of 1,4-butanediol has been generated in China. The basic operation process is: first dissolve the maleic anhydride, and at the same time heat the hydrogen. When its temperature reaches the required temperature, it will be dissolved
The final maleic anhydride is mixed with it. This process is assisted by a vaporizer, and a hydrogen catalytic reaction occurs during the mixing process. Maleic anhydride will be converted during the reaction and can be obtained during the reaction
Reactants with higher purity contain fewer impurities and some intermediate substances that can be recovered can be produced. After obtaining a series of products, through condensation and other treatments to remove excess impurities and moisture, the products will be obtained.
The n-butanol in the material is recovered and processed. This process can also produce 1,4-butanediol and other substances. This set of methods was created and developed by my country’s petrochemical research institute. The entire process does not produce too many pollutants, and the production efficiency is high. The basic process is relatively simple. Overall, it conforms to the concept of high efficiency and environmental protection, and is worth carrying out. Large-scale use and long-term promotion.
2.2 Progress in foreign production technology
In 2013, the U.S. Bioproducts Research Institute discovered a method to produce 1,4-butanediol on a large scale, and the main raw material was sugar, which enabled 1,4-butanediol to be produced and operated on a large scale. Business
raw material. In addition, this method can also be produced using recycled raw materials, which are simple and easy to obtain. On the one hand, this improves the utilization rate of resources, and on the other hand, it also greatly reduces energy consumption.
Compared with traditional preparation methods, this method reduces energy consumption by about 60%, waste emissions are also greatly reduced, and the environmental benefits are obvious. Another American company, DOW, uses a selective hydrolysis process to prepare 1,4-butanediol through the hydrolysis of 1,2-epoxy-3-butene. This company has a unique type of new catalyst that can pass through a series of reaction to selectively produce the final desired product.

Conclusion


1,4-Butanediol is widely used in contemporary industrial production. It has a variety of preparation methods and can also be produced based on different materials. Therefore, the appropriate path can be selected according to specific conditions during formal production, and biological materials can be flexibly selected. Preparation method. Companies with relevant needs should select preparation methods based on specific raw material availability during the manufacturing process. At the same time, in order to make the performance of the prepared 1,4-butanediol more stable and the quality better and more up to standard, the acetylenic aldehyde production process of Xinjiang Meike and others can also be appropriately considered.

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