Abstract: An ice-making water purifier includes a water tank unit, an instantaneous heating device, an extraction member, an ice-maker, a supply pump, an ice-making water inlet passage, an ice-making water supply valve, a flow rate sensor, and a controller configured to control driving of the supply pump and the opening and closing of the ice-making water supply valve such that purified water corresponding to a predetermined supply amount of ice-making water is supplied to the ice-maker on the basis of a flow rate value measured by the flow rate sensor. The controller controls the opening and closing of the channel such that purified water is preferentially supplied to the instantaneous heating device among the instantaneous heating device and the ice-maker.

Abstract: A static electricity visualization apparatus capable of visually identifying a measured level of static electricity is provided.

Abstract: Disclosed is a process for producing a high purity caprolactam which comprises converting cyclohexene obtained by the partial hydrogenation of benzene into cyclohexanol through hydration, converting the cyclohexanol into cyclohexanone through dehydrogenation, converting the cyclohexanone into cyclohexanone oxime through oximation and converting the cyclohexanone oxime into caprolactam through the Beckman rearrangement, characterized by comprising isolating and purifying the methylcyclopentanol from the cyclohexanol prior to use of such cyclohexanol in dehydrogenation and feeding the isolated methylcyclopentanol directly to oximation in order that the methylcyclopentanol is not fed to dehydrogenation. The process of the invention advantageously provides an economic method for producing a caprolactam with greater purity.