A liquid-phase titanium-based composite catalyst, its preparation method and its application in the preparation of polyester compounds

Abstract

The invention discloses a liquid-phase titanium-based composite catalyst, a preparation method and its application in the preparation of polyester compounds, and belongs to the technical field of titanium-based catalyst preparation. Calculated by mass sum of 100%, it consists of 2-10% titanium compound, 0.5-2% ruthenium compound, 5-25% polyether polyol compound, 2.5-13% ethylene glycol and 50-90% ethanol are mixed. In the polyester polymerization process, the addition amount of the catalyst is calculated as titanium compound, which is 1 / 1000 to 5 / 1000 of the mass of the carboxylic acid monomer. The liquid-phase composite catalyst prepared by the present invention is mainly a compound formed by mixing titanium compound, ruthenium compound, polyether polyol compound, ethylene glycol and ethanol. Compared with the existing polyester catalyst, It has the advantages of fast catalytic rate, high activity, low residual carboxyl group content, and good color of the product.

Description

A liquid-phase titanium-based composite catalyst, preparation method and preparation method of polyester compound applications technical field The invention belongs to the technical field of titanium-based catalyst preparation, in particular to a liquid-phase titanium-based composite catalyst, preparation The method and its use in the preparation of polyester compounds. Background technique Polyester is not only one of the most important synthetic fiber raw materials, but also has a very important role in engineering plastics and other industrial fields. important use. my country began to study polyester production technology in 1958, and it has strong development strength and solid Base. Since the 1990s, the increasingly fierce competition in the polyester market has prompted various manufacturers to seek to reduce costs. This, the way to enhance competitiveness. Simplifying the process flow, expanding the production scale, and increasing the single-line produc...

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Problems solved by technology

The addition of ruthenium compound in the invention can effectively improve the catalytic activity of the composite catalyst, solve the problem of low catalytic efficiency in the polyester polymerization process, and at the same time, the catalyst can improve the hue of the product

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