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[Chemical Knowledge]：Production process and preparation method of isooctyl acrylate

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Isooctyl acrylate is an important industrial raw material, which is widely used in plastics, coatings, rubber, ink, glue, oilfield additives and other fields. Its preparation technology has evolved with the continuous development of industrialization. This article will introduce the current more common isooctyl acrylate production process and preparation methods.

1. isooctyl acrylate production process

At present, there are three main production processes of isooctyl acrylate:

1. Synthesis method

synthesis method is a method of esterification reaction of isooctyl acrylate with acrylic acid. The reaction is usually carried out in the presence of an alkyd catalyst. The reaction product is treated by dehydration, purification, decolorization, etc. to obtain isooctyl acrylate. The advantages of this method are that the chemical reaction is relatively simple, the purity of the reaction product is high, and it is suitable for small and medium-scale production.

2. thickening method

thickening method is a kind of acrylic acid and isooctyl alcohol as raw materials, under the action of catalyst polymerization reaction, generating isooctyl acrylate method. The reaction product is treated by filtration, centrifugation, dehydration, decolorization, fractionation and other processes to obtain higher purity isooctyl acrylate. The advantages of this method are that there is no need to add too much acid catalyst and solvent in the reaction process, and it has high conversion rate and high yield.

3. hydrogenation method

hydrogenation method is a kind of acrylate hydrogenation catalytic conversion to produce isooctyl acrylate method. This method can use low-cost raw materials for production, and after selective removal of impurities such as moisture in the reaction, the reaction product purity is higher. After hydrogenation, separation, decolorization and other processes, the quality of the obtained isooctyl acrylate is also improved. However, high pressure and temperature are required in the reaction process of the hydrogenation method, and the equipment cost is high.

2. isooctyl acrylate preparation method

1. synthesis method preparation

synthesis method preparation isooctyl acrylate specific steps are as follows:

(1) isooctyl alcohol and acrylic acid are mixed according to a certain proportion. The

(2) is subjected to an esterification reaction under the action of a catalyst to obtain a preliminary product. Impurities such as isooctanol and water are separated from the preliminary product by distillation or extraction

(3).

(4) decolorization treatment, make the product color more clear and transparent.

(5) Isooctyl acrylate was separated and purified by liquid chromatography embodied by mobile phase.

2. Preparation of
by thickening method The specific steps of preparing isooctyl acrylate by
thickening method are as follows: