Abstract: The invention discloses a porous intermetallic compound and preparation method and application thereof. The pore structure of the porous intermetallic compound includes micropores and mesopores, and the micropores and mesopores are distributed in disorder, wherein the content of the micropores accounts for 6-68%, and the content of mesopores accounts for 32-92%; the specific surface area of the porous intermetallic compound is 50-1600 m2/g, and the porous intermetallic compound is a porous copper silicide intermetallic compound or porous copper-chalcogen intermetallic compound. The invention provides preparation methods of the porous intermetallic compound, and also provides an application of the porous intermetallic compound as a catalyst in the reaction of acetylene hydrochlorination to synthesize vinyl chloride. The porous intermetallic compound catalyst prepared by the invention can carry out the acetylene hydrochlorination reaction in a wide space velocity range, and has good catalytic activity.

Abstract: A preparation method of Cu—Pd—CeO2/?-Al2O3@NP catalyst and a synthesis method of benzopyrazine compounds. The preparation method of the Cu—Pd—CeO2/?-Al2O3@NP catalyst comprises the following steps: (1) preparing a CeO2/?-Al2O3 carrier; (2) preparing a CeO2/?-Al2O3@NP carrier; (3) preparing the Cu—Pd—CeO2/?-Al2O3@NP catalyst by impregnation method. A one-pot method for synthesizing benzopyrazine compounds of formula (III) includes using an o-nitroaniline compound of formula (I) and an aliphatic diol compound of formula (II) as raw materials, carrying out the one-pot synthesis of the benzopyrazine compound of formula (III) under solvent-free condition and under the combined action of the Cu—Pd—CeO2/?-Al2O3@NP catalyst prepared by the method and an alkali. The Cu—Pd—CeO2/?-Al2O3@NP catalyst increases the number of basic sites by doping N and P, and meanwhile loads CeO2 to assist in the extraction of protons, thereby improving the dehydrogenation activity and product selectivity.

Abstract: Provided are a nitrogen-phosphorus-modified granular carbon-supported bimetallic catalyst, a preparation method thereof and the use thereof. The catalyst comprises a nitrogen-phosphorus-modified carbon carrier and metal particles supported on the carbon carrier. The metal particles include first metal elementary substance particles, second metal elementary substance particles and bimetallic alloy phase particles. The percentage of the bimetallic alloy phase particles in the metal particles is ?80%, and at least 90% of the alloy phase particles have a size of 1 nm to 20 nm. The catalyst has advantages such as a high proportion of alloy phase particles, a uniform particle size distribution, a high metal utilization rate, low costs, high stability and a high catalytic activity.

Abstract: A sulfur-containing palladium-carbon catalyst prepared by loading palladium on an active carbon, mixing the palladium-carbon catalyst with a solvent to form a slurry, adding a sulfide to the slurry to treat the loaded palladium under a predetermined temperature, and removing liquid and drying to obtain the catalyst. The sulfur-containing palladium-carbon catalyst is suitable for making phenylene diamine rubber antioxidant with improved productivity and selectivity.

Abstract: A sulfur-containing palladium-carbon catalyst prepared by loading palladium on an active carbon, mixing the palladium-carbon catalyst with a solvent to form a slurry, adding a sulfide to the slurry to treat the loaded palladium under a predetermined temperature, and removing liquid and drying to obtain the catalyst. The sulfur-containing palladium-carbon catalyst is suitable for making phenylene diamine rubber antioxidant with improved productivity and selectivity.

Abstract: This invention relates to a catalyst for ammonia synthesis. The main phase of the catalyst is a non-stoichiometric ferrous oxide expressed as Fe.sub.1-x O, which is structurally in a Wustite crystal phase form having the rock salt face-centered cubic lattice with lattice paracueter of 0.427-0.433 nm. This catalyst, which has quick reduction rate and high activity, and remarkably lowers the reaction temperature, is especially applicable as an ideal low-temperature, low-pressure ammonia synthesis catalsyt and can be widely used in ammonia synthesis industry.