Abstract:
본 발명은 제1 세라믹 입자를 포함하는 제1 용액을 제조하는 단계(단계 1); 제2 세라믹 입자를 포함하는 제2 용액을 제조하는 단계(단계 2); 상기 단계 1 및 2에서 제조된 용액들과, 내부응고제를 삼중노즐을 통해 외부응고조로 동시에 방사하여 중공사막 전구체를 제조하는 단계(단계 3); 및 상기 단계 3에서 제조된 중공사막 전구체를 열수처리 및 소결시키는 단계(단계 4);를 포함하는 다공성 중공사막의 제조방법을 제공한다. 본 발명에 따른 다공성 중공사막의 제조방법은 세라믹 전구체를 사용하여 연속적인 습식 방사를 통한 상전이 공정을 통해 제조함으로써, 제조공정을 단일화시켜 중공사막의 생산 속도가 느린 문제점을 해결하여 대량생산이 가능한 효과가 있으며, 본 발명에 따른 제조방법으로 제조된 다공성 중공사막은 분리활성층의 치밀한 기공으로 배제율이 높고, 지지층으로 인해 우수한 기계적 강도를 가지는 효과가 있다.
Abstract:
A purpose of the present invention is to provide a device for enriching and recovering the fluorinated gas using a separating membrane, and a method to enrich and recover fluorinated gas using the device. The device for enriching the fluorinated gas comprises a gas supplying unit which supplies mixed gas including fluorinated gas; an enriching unit which has one or more separating membrane modules separating the fluorinated gas from the mixed gas by having an inlet through which mixed gas is injected from the supplying unit, the separating membrane separating the fluorinated gas, a penetration hole through which non-fluorinated gas separated from the fluorinated gas by the separating membrane is discharged, and an outlet through which the fluorinated gas is discharged; a decompression pump providing driving power which penetrates the non-fluorinated gas from the separating membrane module, but the pump is connected with the penetration hole of the separating membrane module; and a discharging flux control unit connected with the outlet of the separating membrane module and controlling the flux of the fluorinated gas discharged from the separating membrane module. The device for recovering the fluorinated gas comprises a separating membrane module in the same structure as that of the device for enriching the fluorinated gas. According to the present invention, the fluorinated gas can be enriched and recovered efficiently by recovering lost fluorinated gas through the recovering device. [Reference numerals] (200) Enriching section; (400) Recovering section; (AA) Mass flow controller; (BB) Vacuum pump
Abstract:
The present invention relates to a manufacturing method of a porous aluminum-based hollow fiber membrane, and a linear porous aluminum-based hollow fiber membrane which has improved selective permeability and mechanical strength manufactured by the same and, more particularly, to a manufacturing method of a porous aluminum-based hollow fiber membrane which comprises: a step of manufacturing an aluminum precursor liquid by dissolving an aluminum precursor in the solvent (step 1); a step of manufacturing a spinning solution by adding a polymer resin in the aluminum precursor liquid of the step 1 (step 2); a step of manufacturing a hollow fiber membrane by dipping the spinning solution of the step 2 to coagulant after extruding through a nozzle (step 3); a step of heat treating the manufactured hollow fiber membrane of the step 3 (step 4); a step of sintering the heat treated hollow fiber membrane of the step 4 in a heating furnace by rotating (step 5); and a linear porous aluminum-based hollow fiber membrane manufactured by the same. The manufacturing method of a porous aluminum-based hollow fiber membrane is capable of mass-producing the hollow fiber membrane in which the unit price for producing is cheap by having a simple process; improving the heat-resisting property, the durability, the chemical-proof property, the mechanical strength, and high selective permeability by sintering with rotating inside a tube furnace; manufacturing linear porous aluminum-based hollow fiber membrane which has large valid membrane area per unit volume which is favorable to membrane modularization thereby efficiently using in a water treatment area which needs severe operation condition.
Abstract:
PURPOSE: A novel manufacturing method of Butylmethyl cellulose is provided to be wisely used to the separation membrane and film for water treatment by using methyl cellulose to reduce the manufacturing time and the manufacturing cost, prevent environmental contamination due to by-product, and improve the manufacturing process. CONSTITUTION: A manufacturing method of Butylmethyl cellulose adds methyl cellulose of chemical formula 2, butyric acid and organic solvent of chemical formula 3 to the chemical formula 1 for obtaining the mixture by stirring it. (Step 1) The intended compound is dried to be obtained after the compound manufactured in the step 1 is primary washed with organic solvent and secondary washed with water. (Step 2) [Equation 1] (R is H or CH3 when the R is not H or CH3 at the same time in the chemical formula 2. R is H, CH_3 or C_6H_5CO in the chemical formula 1. The reaction ratio of methyl cellulose: butyric acid of the step 1 is 1: 1-2. Organic solvent of the step 1 is more than one selected from the group of pyridine, quinoline, furan, pyran and thiophene. The step 1 is performed in 120-150 °C. The step 1 is performed in 2-4 hours. Organic solvent of the step 2 is selected from the group of methanol, ethanol, propanol and butanol.
Abstract:
본 발명은 불화가스 분리농축장치 및 이를 이용한 불화가스의 분리농축방법에 관한 것으로, 상세하게는 불화가스를 포함하는 혼합가스가 공급되는 가스공급부; 상기 가스공급부로부터 공급되는 혼합가스의 유량을 제어하는 유입량제어부; 상기 유입량제어부를 통해 혼합가스가 주입되는 주입구, 불화가스가 분리된 비불화가스가 배출되는 투과구 및 분리된 불화가스가 배출되는 배출구를 구비하여 혼합가스로부터 불화가스를 분리하는 분리막 모듈이 1 또는 그 이상 직렬연결된 분리부; 상기 분리부의 투과구와 연결되되, 상기 분리부 내부를 감압시켜 분리막 모듈 내부로 가스가 주입 및 분리되는 구동력을 발생시키는 감압부; 및 상기 분리부의 배출구와 연결되되, 상기 분리부로부터 배출되는 불화가스의 유량을 제어하는 배출량제어부를 포함하는 불화가스 분리농축장치를 제공한다. 본 발명에 따른 불화가스 분리농축장치 및 이를 이용한 불화가스의 분리방법은 분리막을 이용하여 불화가스를 처리하는 종래의 가압방식보다 더욱 높은 불화가스 분리·농축 효율을 나타낼 수 있다. 또한, 불화가스의 분리가 수행되는 분리막 모듈의 압력을 일정하게 유지하여 대형화에 따른 효율저하 문제가 없으며, 가압부로 인하여 불화가스가 배출되는 공정에 악영향을 주는 문제를 방지할 수 있다.
Abstract:
PURPOSE: A separating film module and a mixed gas separation and concentration device including the same are provided to minimize the pressure deviation inside the separating film module, thereby securing the high separation efficiency of fluorinated gas during the separation of the fluorinated gas by pressure reduction. CONSTITUTION: A separating film module is a hollow fiber membrane which includes a penetration part and an outlet. The separating film module includes the porous media(20) inside and is divided into multiple sections by the media. The divided sections have the same pressure by pores of the porous media, and the penetrated gas from the pores of the porous media is discharged through the outlet. The porous media is made of a plastic material which has excellent chemical resistance and mechanical strength against the fluorinated gas.
Abstract:
PURPOSE: A separation and concentration device for fluorinated gas and a separation and concentration method for fluorinated gas using the same are provided to achieve the high separation and concentration efficiency of fluorinated gas compared to the previous pressurizing method which processes fluorinated gas using a separation film and to maintain the constant pressure of a separation film module in which the separation of fluorinated gas is conducted, thereby preventing efficiency reduction due to a large size and preventing an adverse effect to a fluorinated gas discharge process due to a pressurizer. CONSTITUTION: A separation and concentration device for fluorinated gas comprises a gas supply unit(100), an inflow control unit(200), a separation unit(300), a pressure reducer(400), and a discharge quantity control unit(500). The inflow control unit controls the flow rate of mixed gas including fluorinated gas supplied from the gas supply unit. A separation film module comprises an inlet, a penetration part, and an outlet. The mixed gas is injected into the inlet through the inflow control unit. Non-fluorinated gas in which the fluorinated gas is separated is discharged through the penetration part. The separated fluorinated gas is discharged through the outlet. At least one separation film module which separates the fluorinated gas from the mixed gas is serially connected to the separation unit. The pressure reducer is connected to the penetration part of the separation unit. The pressure reducer reduces the pressure inside the separation unit and generates driving force by which gas is injected into the separation film module and separated. The discharge quantity control unit is connected to the outlet of the separation unit in order to control the flow rate of the fluorinated gas discharged from the separation unit.
Abstract:
PURPOSE: An acetylation methylcellulose, and a manufacturing method of the same, a coating agent for the water treatment separation membrane including the same, and a manufacturing method of separation membrane for water treatment using the same are provided to manufacture the coating agent of the separation membraned which has superior mechanical strength by preventing the phenomenon that the decomposition occurs before melting occurs since having low melting point than natural polymer for the existing separation membrane of separation membrane material, and to have excellent profitability since the simplification of the manufacturing process is possible unlike the existing separation membrane material. CONSTITUTION: The manufacturing method of the acetylation methylcellulose includes the step of manufacturing solution by dissolving methylcellulose in the solvent containing more than one kind selected from the pyridine, and the acetone and their mixture, adding acetic anhydride in the solution and performing acetylation reaction and solidifying in the water. The rate of solvent and methylcellulose is 5 ~ 40 : 95 ~ 60 weight ratio. The amount of the acetic anhydride is 0.5 ~ 3 molar ratio per the methylcellulose unit. The acetylation reaction operates in 10 ~ 90°C. The acetylation methylcellulose has 160 ~ 180°C melting point.