Preparation method of triethylene glycol di-n-octoate

A technology of triethylene glycol and n-octanoate, which is applied in the field of ester plasticizers, can solve the problems of harshness, high production cost, and complicated preparation conditions, and achieve the effects of low cost, reduced production cost, and simple preparation method
CN113754536APending Publication Date: 2021-12-07孟永财
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
孟永财
Publication Date
2021-12-07

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Abstract

The invention relates to a preparation method of triethylene glycol di-n-octoate, which comprises the following steps: S1, adding n-caprylic acid into triethylene glycol, and under the action of a catalyst, raising the temperature to 120-130 DEG C for esterification reaction, wherein the catalyst is tetrabutyl titanate and / or tetraisobutyl titanate; S2, after the esterification reaction is finished, removing n-caprylic acid through reduced pressure distillation to obtain a triethylene glycol di-n-caprylate liquid crude product; and S3, neutralizing, washing and dehydrating the triethylene glycol di-n-octoate liquid crude product, removing residual moisture and impurities through a film evaporator, and performing molecular distillation to obtain a triethylene glycol di-n-octoate finished product.
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Description

technical field

[0001] The application belongs to the technical field of ester plasticizers, in particular to a preparation method of triethylene glycol di-n-octanoate. Background technique

[0002] Plasticizers are substances added to increase plasticity, fluidity and flexibility of finished products when processing high polymers such as rubber, plastics, and coatings. The world's largest producer and consumer of durable goods. Triethylene glycol dicarboxylate is a kind of plasticizer especially suitable for the processing of polyvinyl butyral (PVB). Caprylate is a solvent-based cold-resistant plasticizer, which has excellent low temperature resistance, durability, oil resistance, ultraviolet radiation resistance and antistatic properties, and has the characteristics of low viscosity and certain lubricity. Its molecular structure can make plastic products It has good chroma and transparency, and its polarity is similar to that of resin, so it has good compatibility with r...

Claims

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