Abstract:
본 발명은 증류탑에서 배출되는 오버헤드 스트림에 의해 기액분리기에서 분리 배출되는 가스스트림 및 원료로 피딩(feeding)되는 천연가스 스트림의 냉각이 이루어지며, 가스스트림 및 천연가스 스트림의 냉각에 사용된 오버헤드 스트림이 적어도 제1오버헤드 스트림과 제2오버헤드 스트림으로 분배된 후, 분배된 오버헤드 스트림 각각이 압축기에 의해 압축됨에 따라, 천연가스액 스트림의 회수에 소요되는 에너지 절감이 가능하며, 오버헤드 스트림의 압축에 필요한 압축기의 용량 및 크기의 감소가 가능하고 이에 따라 공정 설비에 투자되는 자본의 절감이 가능하며, 오버헤드 스트림의 분배가 이루어진 후, 각각의 오버헤드 스트림이 압축됨에 따라, 동일한 설비 내 유연한 처리 조건의 설계가 가능한 천연가스액 회수 장치 및 방법에 관한 것이다.
Abstract:
PURPOSE: A continuous oxygen production method and a continuous oxygen absorption-desorption apparatus are provided to obtain high productivity and high collect rate compare to an oxygen production apparatus which uses a previous nitrogen selective absorbent and to have high selectivity about oxygen. CONSTITUTION: A continuous oxygen production method includes the following steps; a step in which oxygen is absorbed through an oxygen selective absorption-desorption agent as refreshing air is supplied in multiple absorption-desorption towers (111,113) filled with an oxygen selective absorbent and in which concentrated nitrogen without oxygen is discharged; a step in which concurrent decompression is conducted until the inside of the absorption-desorption tower which is vacuum desorbed meets an atmospheric pressure; a step which collects the air, which is absorbed in the absorption-desorption tower, in an oxygen storage tank (130); and a step which compresses the absorption-desorption tower, which is vacuum desorbed, until the absorption-desorption tower meets an absorption pressure using the compressed nitrogen discharged during the absorption process.
Abstract:
PURPOSE: An oxygen selective absorbent with rapid absorbent rate and a method for manufacturing the same are provided to rapidly absorb oxygen from atmosphere. CONSTITUTION: A method for manufacturing an oxygen selective absorbent with rapid absorbent rate includes the following: BaMg(CO_3)_2 particles or BaMg(CO_3)_2 particles with MgCO_3 or Mg(OH)_2 attached on the external sides are prepared; and the particles are fired at high temperatures. In the BaMg(CO_3)_2 particles with MgCO_3 or Mg(OH)_2 attached on the external sides, the molar ratio of the MgCO_3 or Mg(OH)_2 to BaMg(CO_3)_2 is 1 : 10. The BaMg(CO_3)_2 particles are prepared by dispersing the mixture of barium containing compounds and carbonate in distilled water and adding a magnesium carbonate precursor in the dispersed solution. [Reference numerals] (AA) Absorbed amount/saturated absorbed amount; (BB) Time(minutes); (CC) Comparative example 1; (DD) Example 1; (EE) Example 2
Abstract:
A method for separating a hydroxyalkyl monoacrylate and an alkanediol diacrylate is provided to improve the selectivity by using a two-component extraction solvent. A method for separating a hydroxyalkyl monoacrylate and an alkanediol diacrylate comprises the step of supplying water to the upper part of an extraction tower and cyclohexane to the lower part to separate 4-hydroxybutyl acrylate and 1,4-butanediol diacrylate generated by the esterification of acrylic acid and 1,4-butanediol in the presence of an acid catalyst by using water and cyclohexane as an extraction solvent, wherein the ratio of water and cyclohexane is 10:1 to 1:10; the supply amount of water is 5-50 mL/min based on the extraction tower of volume 1,500 mL; and the supply amount of cyclohexane is 5-50 mL/min based on the extraction tower of volume 1,500 mL.
Abstract:
Provided is a method for preparing 4-hydroxybutyl acrylate used as a material for preparing a paint for the top coating of automobiles, with high yield and high selectivity. A method comprises the step of reacting acrylic acid and 1,4-butanediol with a cation exchange resin catalyst as a solid acid catalyst to prepare 4-hydroxybutyl acrylate, wherein the amount of acrylic acid, 1,4-butanediol and the cation exchange resin catalyst are 55-65 wt%, 34-45 wt% and 0.4-1.7 wt%, respectively. The cation exchange resin catalyst is any one selected from Amberlyst 15 (wt) catalyst or Amberlyst 15 (dry) (Rohm and Hass). Preferably the reaction is carried out at a temperature of 100-110 deg.C.
Abstract translation:本发明提供一种高收率,高选择性地制备作为汽车面漆用涂料的原料的丙烯酸4-羟丁酯的制造方法。 一种方法包括使丙烯酸和1,4-丁二醇与作为固体酸催化剂的阳离子交换树脂催化剂反应以制备丙烯酸4-羟丁酯的步骤,其中丙烯酸,1,4-丁二醇和阳离子交换树脂 催化剂分别为55-65重量%,34-45重量%和0.4-1.7重量%。 阳离子交换树脂催化剂是选自Amberlyst 15(wt)催化剂或Amberlyst 15(干燥)(Rohm and Hass)中的任何一种。 优选反应在100-110℃的温度下进行。
Abstract:
액체상과 고체상 규산나트륨을 일정비율을 갖는 용액상으로 만들고, 이에 상응하는 알루민산나트륨용액은 알루미늄 덩어리를 이용하여 만들어, 상온에서 규산나트륨용액에 알루민산나트륨용액을 장시간에 거쳐 미량씩 첨가하면서 강하게 혼합시킨다. 이때 SiO 2 /Al 2 O 3 =2.5-5.0, Na 2 O/Al 2 O 3 =4.0-7.0, H 2 O/Al 2 O 3 =100-280, -알루미나 5wt 의 비율이며, 24-36시간의 숙성을 유지한 후 90-110 의 온도범위에서 고온과 저온의 2단계로 반응시켜서, 비표면적 750 /g 이상의 재연성을 갖는, 특히 CO 2 유효흡착량이 큰 알루미노실리케이트 흡착제를 제조한다.