This is the report on the first practically available calcined high-silica zeolite membranes in an industrial scale synthesized using an organic structure directing agent for an application of dehydration of N-methyl pyrrolidone [NMP] solution by pervaporation (PV). A manufacturing method for high-silica CHA-type tubular membrane (Si/Al = 8) with 40 cm long was developed for industrial purpose. Furthermore, mass-production with high reproducibility came to be possible for commercialization. The potential membrane performance in PV was measured systematically at the wide range of conditions in temperatures of 90-130 degrees C and feed compositions of water concentration in the feed of 1-50 wt.%. The permeation flux of 36 kg m(-2) h(-1) and 2.5 x 10(-6) mol m(-2) s(-1) Pa-1 for water permeance with separation factor (alpha) of 1100 were observed at 130 degrees C in a feed mixture of water (50 wt.%)/NMP (50 wt.%). A practical dehydration test was performed for a batch of 44 kg hydrous NMP (H2O 30 wt.%/NMP 70 wt.%) using a practical membrane module containing 31 pieces of tubular membranes with a membrane area of 0.4 m(2). The product of anhydrous NMP with 99.5 wt.% could be obtained at 110 degrees C by PV for 400 min. These results demonstrate that the synthesized high-silica CHA-type membranes can be applied to dehydration of hydrous NMP solution at wide range of water contents in the feed. The water diffusivities were determined based on the Maxwell-Stefan equations with the PV experimental results in the water-NMP system. The reduction was observed in water diffusivity of 1 order of magnitude with decreasing of water contents from the pure water to water (1 wt.%)/NMP (99 wt.%) in the feed. The synthesized high-silica CHA-type zeolite membranes exhibited the crystallographic orientation of [1 1 1](r) axis. Observations by scanning electron microscopy (SEM) and X-ray diffractometor (XRD) analysis on the synthesized samples as a function of time suggested that the growth mechanism of evolutional selection was operated in the membrane formation. This mechanism should contribute to the closed-packed polycrystalline membrane with sufficient permselective properties to practical PV applications. (C) 2012 Elsevier B.V. All rights reserved.