Influence of ultrasonic irradiation on ammonia leaching of zinc from low-grade oxide zinc ore

The residue was oxidized with NaOCl aqueous solution under ultrasonic irradiation.

A one-pot synthesis of 2,5-disubstituted-1,3,4-thiadiazoles 7a～7g and N-substituted dihy- drazides 8a～8i was performed by the reaction of 4-methyl phenoxyacetyl chloride 4 with ammonium thio- cyanate under ultrasonic irradiation and solid-liquid phase transfer catalysis,and subsequent irradiation in the presence of N-arylglycine hydrazides 2.

Chitosan was grafted with salicylaldehyde under ultrasonic radiation.

Chitosan was grafted with vanillin in the ethanol under ultrasonic radiation.

The application of ultrasonic radiation and polar aprotic solvent in the synthesis of dialkyl thiourea with NH_2C(=S)NH_2 and RBr was studied in this paper for the first time.

The p-nitro-ethyl benzoate is synthesized by the reaction of nitrogenous acid with methyl alcohol in catalysis of sodium bisulfate monohydrate under ultrasound irradiation.

O-(hydroxyl isopropy1)chitosan is synthesized via 10% tetramethylammonium hydroxide catalyzed reaction of 1,2-epoxypropane with chitosan assisted with ultrasound irradiation.

Synthesis of 2,2,4-trimethyl-2,3-dihydro-1H-1,5-benzodiazepine under ultrasound irradiation;

An optical klystron is built in the 800 MeV electron storage ring at University of Science and Technology of China for harmonic super radiation generation.