A method for homogeneously synthesizing bis(2-ethylhexyl) terephthalate
A technology of terephthalic acid and tetrabutyl titanate, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, can solve the problems of human carcinogenesis and high energy consumption in the reaction process, and achieve improved efficiency, The effect of shortening the reaction time and reducing energy consumption
Active Publication Date: 2022-06-10
JIANGNAN UNIV +1
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the main problems in the industrial preparation of DOTP are: the reaction is a heterogeneous reaction of solid-liquid mixing, its industrial reaction time is twice that of DOP, and the energy consumption of the reaction process is high.
[0004] Global fossil fuels are becoming increasingly depleted. At present, the main plasticizer used in my country is DOP, but the raw material of DOP is fossil resources. Due to its non-renewable nature and the fact that DOP has been found to be carcinogenic to humans in recent years, it is widely used in Europe and the United States. DOP in other countries and regions has been banned from being used in children's toys, medical equipment, etc.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
Embodiment 2
[0031]
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for homogeneously synthesizing bis(2-ethylhexyl) terephthalate, and belongs to the technical field of plasticizer DOTP preparation. The method of the present invention uses a specific suitable solvent NMP, and uses tetrabutyl titanate as a catalyst to catalyze the esterification of acid alcohol raw materials. It only needs to react for 4 hours, and the reaction acid value is reduced to 1mg KOH / g, and the esterification rate of the obtained product reaches 99%. . Compared with the heterogeneous esterification reaction of DOTP without adding solvent, the method of the invention shortens the reaction time by half, greatly reduces the energy consumption of the reaction, and reduces the loss of heat in the reaction process. The method of the invention transforms the existing heterogeneous reaction into a homogeneous reaction, greatly improves the efficiency of the esterification reaction, shortens the reaction time, and achieves excellent esterification effect, and has broad application prospects in industry.
Description
A kind of method for homogeneous synthesis of two (2-ethylhexyl terephthalate) technical field The present invention relates to a kind of method for homogeneous synthesis of two (2-ethylhexyl terephthalate), belong to plasticizer DOTP system technical field. Background technique Along with the continuous development of plasticizer industry, two (2-ethylhexyl terephthalate) (DOTP) has gradually replaced in recent years. Diisooctyl phthalate (DOP) appeared in the public eye. However, the main problems existing in the industrial preparation of DOTP at present The question is: This reaction is a heterogeneous reaction of solid-liquid mixing, its industrial reaction time is twice that of DOP, and the reaction process energy High consumption. And for the problem that the esterification reaction time of DOTP is long, energy consumption is high, domestic also does not have relevant mature technology at present to solve. The purpose of this patent is to find a suitable ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/08C07C69/82
CPCC07C67/08C07C69/82
Inventor 蒋平平冯珊张萍波沈劲贤范义益
Owner JIANGNAN UNIV