Abstract: The present disclosure discloses a substrate heat-treating apparatus including a process chamber in which a flat substrate to be heat treated is placed, the process chamber comprising a beam transmitting plate placed below the flat substrate and an infrared transmitting plate placed above the flat substrate; a beam irradiating module for irradiating a VCSEL beam having a single wavelength to a lower surface of the flat substrate through the beam transmitting plate; and an temperature measuring module configured to measure the laser beam reflected from the lower surface or an upper surface the flat substrate, thereby measuring the temperature of the flat substrate.

Abstract: The present disclosure discloses a substrate heat-treating apparatus including a process chamber in which a flat substrate to be heat treated is placed, the process chamber comprising a beam transmitting plate placed below the flat substrate and an infrared transmitting plate placed above the flat substrate; a beam irradiating module for irradiating a VCSEL beam having a single wavelength to a lower surface of the flat substrate through the beam transmitting plate; and an emissivity measuring configured to measure the laser beam reflected from the lower surface or an upper surface the flat substrate, thereby measuring the emissivity of the flat substrate.

Abstract: The present specification provides a method of preparing a heterogeneous linear carbonate, including transesterifying an aliphatic alcohol and a symmetric linear carbonate in the presence of a catalyst, wherein the catalyst is a porous type basic ion exchange resin having an exchange capacity of 1 (eq/l-wet resin) or more and 1.5 (eq/l-wet resin) or less. The preparation method of the present specification provides a method of preparing a heterogeneous, symmetric linear carbonate and asymmetric linear carbonate in high yield without a process of reactive distillation.

Abstract: The present invention relates to a method of preparing a heterogeneous linear carbonate, the method including performing a transesterification reaction of dimethyl carbonate (DMC) and ethanol (EtOH) in the presence of a catalyst, wherein the catalyst is one or more selected from the group consisting of lithium methoxide (LME), lithium ethoxide (LEE), sodium methoxide (SME), sodium hydroxide (NaOH), and a mixture thereof, and the catalyst is input in a state of being dissolved in a sulfoxide-based solvent.

Abstract: Provided herein is a method of preparing a heterogeneous linear carbonate, including: performing a transesterification reaction of dimethyl carbonate (DMC) and ethanol (EtOH) in the presence of a catalyst; and filtering a composite obtained by the transesterification reaction through a filter.

Abstract: The present invention provides a method of preparing a heterogeneous linear carbonate, the method including transesterifying an aliphatic alcohol and a symmetric linear carbonate in the presence of a catalyst, wherein the catalyst is an acidic ion exchange resin, and a mass ratio of the aliphatic alcohol and the symmetric linear carbonate (aliphatic alcohol:symmetric linear carbonate) is 1:10 or more and 50:1 or less. The preparation method of the present specification provides a method of preparing a heterogeneous, symmetric linear carbonate and asymmetric linear carbonate in high yield without a process of reactive distillation, and is economical because a product and a catalyst can be easily separated.

Abstract: The present invention relates to a method for separating aromatic compounds contained in naphtha which includes an extraction step of contacting specific ionic liquids and naphtha and a step of separating the aromatic compounds from naphtha contacted with the ionic liquids.