Abstract: The present invention relates to a catalyst for synthesizing ethylenimine as well as a preparation method and application thereof. The related catalyst comprises a carrier and metal ions loaded on the carrier; the carrier is a composite oxide comprising titanium, silicon and phosphorus elements; the metal ions are magnesium ions, iron ions and cesium ions; the molar ratio of the magnesium ions to the iron ions to the cesium ions is (1-10):1:0.1; the mass of all metal ions is 0.5-10 percent of that of the carrier. In the related preparation method, a catalyst precursor is roasted at the temperature of 350-650° C., so that the catalyst is obtained; the catalyst precursor is the mixture of the carrier, soluble salt of magnesium, soluble salt of iron and soluble salt of cesium. The present invention also provides the application of the catalyst to synthesis of the ethylenimine by using amino alcohol as the raw material. Compared with a common catalyst which has the requirement on the temperature of over 400° C.

Abstract: An establishing method of a knowledge library engine based on emergency management includes steps of extracting relevant data from unstructured text information, filtering out unwanted data and improving a structure of the relevant data, so as to ensure homogeneity of the relevant data; structurally analyzing a text content of obtained information, extracting a feature thereof and storing the feature in the feature library as a key word of a knowledge; and processing the obtained information with the automatic word segmentation module, then classifying a result according to an information classification standard, and establishing an association of the knowledge and information classification. A querying method of the knowledge library engine based on emergency management includes steps of: understanding semanteme, understanding knowledge, and querying knowledge.

Abstract: The present invention relates to a catalyst for synthesizing ethylenimine as well as a preparation method and application thereof. The related catalyst comprises a carrier and metal ions loaded on the carrier; the carrier is a composite oxide comprising titanium, silicon and phosphorus elements; the metal ions are magnesium ions, iron ions and cesium ions; the molar ratio of the magnesium ions to the iron ions to the cesium ions is (1-10):1:0.1; the mass of all metal ions is 0.5-10 percent of that of the carrier. In the related preparation method, a catalyst precursor is roasted at the temperature of 350-650° C., so that the catalyst is obtained; the catalyst precursor is the mixture of the carrier, soluble salt of magnesium, soluble salt of iron and soluble salt of cesium. The present invention also provides the application of the catalyst to synthesis of the ethylenimine by using amino alcohol as the raw material. Compared with a common catalyst which has the requirement on the temperature of over 400° C.

Abstract: An establishing method of a knowledge library engine based on emergency management includes steps of extracting relevant data from unstructured text information, filtering out unwanted data and improving a structure of the relevant data, so as to ensure homogeneity of the relevant data; structurally analyzing a text content of obtained information, extracting a feature thereof and storing the feature in the feature library as a key word of a knowledge; and processing the obtained information with the automatic word segmentation module, then classifying a result according to an information classification standard, and establishing an association of the knowledge and information classification. A querying method of the knowledge library engine based on emergency management includes steps of: understanding semanteme, understanding knowledge, and querying knowledge.