Butyl Acrylate Butyronitrile (BABN) is an important raw material for the production of chemicals, which is widely used in the fields of synthetic rubber, plastics, coatings and so on. In this paper, we will introduce the manufacturing method of Butyl Acrylate Butyronitrile, including raw material preparation, reaction process, post-treatment and so on.
I. Raw material preparation
The main raw materials for manufacturing butyl acrylate nitrile include butene, acrylonitrile and acrylic acid. Among them, butene is used as an alkylating reagent, acrylonitrile provides a cyano group, and acrylic acid provides a carboxyl group. In order to ensure the smooth progress of the reaction, certain catalysts and solvents also need to be prepared.
II. Reaction process
The manufacture of butyl acrylate nitrile is mainly realized by alkylation reaction. The specific steps are as follows:
1. Mix acrylic acid and acrylonitrile according to a certain ratio, add catalyst, and heat and stir for pre-reaction. The purpose of the pre-reaction is to make acrylic acid and acrylonitrile fully contact, and improve the rate of the subsequent alkylation reaction.
2. The pre-reaction mixture is cooled down, butene and solvent are added, and the alkylation reaction is carried out again with heating and stirring. During the alkylation reaction, butene undergoes an electrophilic substitution reaction with acrylonitrile to produce butyl butyl acrylate nitrile.
3. The reaction temperature and time are controlled to ensure the generation of butyl acrylate nitrile. Meanwhile, the progress of the reaction is monitored by titration or chromatography so that the reaction conditions can be adjusted in time.
III. Post-treatment
After the reaction, the product needs to be post-treated to obtain butyl acrylate nitrile with high purity. The specific steps are as follows:
1. Cool the reaction mixture, separate the unreacted raw materials and solvent by distillation or extraction to obtain the crude product.
2. Refine the crude product, usually by distillation, crystallization, filtration and other methods, to remove impurities and improve the purity of the product.
3. Conduct quality testing on the refined product to ensure that the product meets the relevant standards.
4. Precautions
1. In the whole manufacturing process, the reaction temperature and time need to be strictly controlled to avoid the occurrence of side reactions and improve the selectivity of the product.
2. The selection and use of catalyst has an important influence on the reaction rate and product selectivity, so it is necessary to select a suitable catalyst according to the actual situation.
3. In the post-treatment process, it is necessary to ensure that the quality of the product meets the relevant standards to avoid harming the environment and human health.
In conclusion, the manufacture of butyl acrylate nitrile needs to master the relevant chemical reaction principles and manufacturing process, and strictly control the reaction conditions and post-treatment process to obtain high-quality products. At the same time, safety management and environmental protection measures in the production process need to be strengthened to ensure the smooth progress of the production process.
