The PPD process application project of Sinopec Southern Chemical Research Institute passed the review

Recently, the "High-quality p-phenylenediamine (PPD) process optimization and application research in aramid fiber production" undertaken by Sinopec Nanjing Chemical Research Institute Co.
, Ltd.
passed the online project evaluation organized by the Ministry of Science and Technology of Sinopec
.

As the main raw material of aramid 1414, high-quality p-phenylenediamine can meet the high performance requirements of aramid 1414
.
With the development of China's national defense, aerospace and modern industry, the localization of aramid 1414 is particularly urgent
.

Under the optimized conditions, the conversion rate of p-nitrobenzene chloride in the ammoniation process of this project is 100%, and the yield of p-nitroaniline exceeds 98%; the conversion rate of p-nitroaniline in the hydrogenation process is 100%, The amine yield is over 96%, and the selected antioxidants can be stored for more than 6 months without discoloration
.
The purity of a batch of p-phenylenediamine products produced by this project is higher than 99.
96%, and it has been industrialized in the thousand-ton aramid fiber plant of Yihua Company, meeting the technical requirements for the production of aramid fiber 1414
.

Through the research on the aramid 1414 spunlace special material process, the project has formed the production technology and evaluation standard for the preparation of spunlace special staple fiber by using medium and low viscosity powder; Barrier layer spunlace nonwoven
.
The project has applied for 5 Chinese invention patents and formulated 1 enterprise standard
.

The review committee suggested that the industrial application of the project should be accelerated, and the technical research on diamine chemicals should be accelerated, so as to provide technical support in the production of raw materials for the development of Sinopec's new materials
.