Abstract: The present invention belongs to the field of petrochemical industry, and discloses a method for selective hydrogenation of butadiene extraction tail gas and a selective hydrogenation apparatus thereof.

Abstract: A spork structure includes a spoon body, a handle, and two outer serrated plates and at least an inner serrated plate arranged apart from one another at the front end of the spoon body. The inner serrated plate has a height difference portion, and the spork structure is integrally formed by pressing a plant fiber slurry, and the height difference portion is provided for enhancing the structural strength of the inner serrated plate, so that the spork structure has a better structural strength to pierce through food such as steaks, pork chops, vegetables, and fruits, and the spork structure is 100% decomposable naturally after being discarded, and thus having an environmental protection effect.

Abstract: A cup includes a transparent body having an inner and an outer wall to define an annular hollow space between them, a bottom sealing a lower end of the body and the annular hollow space, an open-bottomed chamber formed below the body to communicate with the annular hollow space via an opening provided on the bottom, a luminous strip with printed pictures, words or patterns enclosed in the annular hollow space, a driving circuit mounted in the chamber to electrically connect to the luminous strip and parallelly connected to a vibrating-type switch, and a lower cover detachably closing the chamber. When the cup is vibrated to make the vibrating-type switch, the luminous strip is lightened for the pictures, words or patterns to produce cold light that is refracted by the outer wall of the body to show three-dimensional images on the cup.

Abstract: A cup includes a transparent body having an inner and an outer wall to define an annular hollow space between them, a bottom sealing a lower end of the body and the annular hollow space, an open-bottomed chamber formed below the body to communicate with the annular hollow space via an opening provided on the bottom, a luminous strip with printed pictures, words or patterns enclosed in the annular hollow space, a driving circuit mounted in the chamber to electrically connect to the luminous strip and parallelly connected to a vibrating-type switch, and a lower cover detachably closing the chamber. When the cup is vibrated to make the vibrating-type switch, the luminous strip is lightened for the pictures, words or patterns to produce cold light that is refracted by the outer wall of the body to show three-dimensional images on the cup.