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公开(公告)号：KR1020040005446A
公开(公告)日：2004-01-16
申请号：KR1020020040014
申请日：2002-07-10
Applicant: 한국과학기술연구원
IPC: C22B3/24
CPC classification number: Y02P10/234
Abstract: PURPOSE: A method for recovering gold from acidic thiourea aqueous solution containing gold using activated carbon is provided to solve problems of conventional gold recovering method such as complicated process, large consumption of thiourea and environmental pollution due to use of organic solvent. CONSTITUTION: The method comprises steps of adsorbing gold in the acidic thiourea aqueous solution containing gold using activated carbon as adsorbent; and recovering gold as bullion by burning the gold contained activated carbon adsorbent, wherein the acidic thiourea aqueous solution is leached from gold concentrate, and the activated carbon is granular activated charcoal having a grain size of 0.5 to 2 mm, wherein the adsorption step is performed by injecting nitrogen gas into the acidic thiourea aqueous solution in a flow rate of 200 to 400 ml/min per liter of the acidic thiourea aqueous solution before and during the adsorption, wherein 0.8 to 1.5 g of activated carbon per liter of the acidic thiourea aqueous solution is used in the adsorption step, wherein the adsorption step is performed by agitating the acidic thiourea aqueous solution containing gold at an agitation speed of 100 to 300 rpm at a temperature of 20 to 30 deg.C, and wherein the adsorption step is performed in two to four adsorption steps.
Abstract translation: 目的：提出一种使用活性炭从酸性硫脲水溶液中回收金的方法，以解决常规金回收方法的问题，如复杂工艺，硫脲用量大，使用有机溶剂造成的环境污染。 构成：该方法包括使用活性炭作为吸附剂将金吸附在含有金的酸性硫脲水溶液中的步骤; 并通过燃烧含金的活性炭吸附剂来回收黄金，其中酸性硫脲水溶液从金浓缩物中浸出，活性炭是粒径为0.5-2mm的粒状活性炭，其中进行吸附步骤 通过在吸附前和吸附过程中以每升酸性硫脲水溶液200〜400ml / min的流量将氮气注入酸性硫脲水溶液中，其中每升酸性硫脲水溶液为0.8〜1.5g活性炭 溶液用于吸附步骤，其中吸附步骤是通过在20至30℃的温度下以搅拌速度100至300rpm搅拌含有金的酸性硫脲水溶液进行的，其中进行吸附步骤 在两到四个吸附步骤。
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公开(公告)号：KR100411183B1
公开(公告)日：2003-12-18
申请号：KR1020010019536
申请日：2001-04-12
Applicant: 한국과학기술연구원
IPC: B01D11/04
Abstract: PURPOSE: A method of extracting free nitric and hydrogen fluoride from the waste pickling solution of the stainless steel by organic solution containing tributyl phosphate. The free nitric and fluoric acid in the organic solution is later reverse extracted by water to carry on the continuous recovery. The method has high recovery rate of the acid than the conventional stirring-separation method and the treatment volume is increased while the installation area is decreased. The method is a novel economical method of column extraction which recovers the acids from the waste pickling solution, minimizing the discharge of environmental pollutants. CONSTITUTION: The extraction method comprises: a first step of extracting free nitric and hydrogen fluoride in the waste pickling solution of stainless steel with an organic solution containing 60-80 %(v/v) of tributyl phosphate by column extractor wherein the pulse velocity (AxF) is 150-170 cm/min, while the phase equilibrium of the waste acid wash/organic solution (A/O) is 1/3-2/3, total flow rate based on the phase equilibrium (A/O) being 3-4.2 mL/min per cm¬2 and a second step of reverse extracting nitric and fluoric acid from the above organic solution by water, wherein the pulse velocity (AxF) is 140-160 cm/min. while the phase equilibrium of the waste acid wash/organic solution (A/O) is 2/3-2, total flow rate based on the phase equilibrium (A/O) being 1.5-2 mL/min per cm¬2.
Abstract translation: 目的：通过含有磷酸三丁酯的有机溶液从不锈钢的废酸洗溶液中提取游离的硝酸和氟化氢的方法。 游离的有机溶液中的硝酸和氟酸后来被水反萃取以进行连续的回收。 该方法具有比常规搅拌分离方法高的酸回收率，并且处理量增加，而安装面积减小。 该方法是一种新型经济的柱提取方法，从废酸洗液中回收酸，减少了环境污染物的排放。 构成：提取方法包括：第一步，用含有60-80％（v / v）磷酸三丁酯的有机溶液，通过柱提取器，在不锈钢的废酸洗溶液中提取游离的硝酸和氟化氢， （A / O）的相平衡为1 / 3-2 / 3，基于相平衡（A / O）的总流速为150-170cm / min，而废酸洗/有机溶液 每平方厘米3-4.2毫升/分钟;以及第二步，用水从上述有机溶液中反萃取硝酸和氟酸，其中脉冲速度（AxF）为140-160厘米/分钟。 而废酸洗/有机溶液（A / O）的相平衡为2 / 3-2，基于相平衡（A / O）的总流速为1.5-2mL / min / cm 2。
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公开(公告)号：KR1020020079004A
公开(公告)日：2002-10-19
申请号：KR1020010019536
申请日：2001-04-12
Applicant: 한국과학기술연구원
IPC: B01D11/04
CPC classification number: B01D11/0492 , C02F1/583 , C02F1/586 , C02F2101/14 , C02F2101/163 , C02F2103/16
Abstract: PURPOSE: A method of extracting free nitric and hydrogen fluoride from the waste pickling solution of the stainless steel by organic solution containing tributyl phosphate. The free nitric and fluoric acid in the organic solution is later reverse extracted by water to carry on the continuous recovery. The method has high recovery rate of the acid than the conventional stirring-separation method and the treatment volume is increased while the installation area is decreased. The method is a novel economical method of column extraction which recovers the acids from the waste pickling solution, minimizing the discharge of environmental pollutants. CONSTITUTION: The extraction method comprises: a first step of extracting free nitric and hydrogen fluoride in the waste pickling solution of stainless steel with an organic solution containing 60-80 %(v/v) of tributyl phosphate by column extractor wherein the pulse velocity (AxF) is 150-170 cm/min, while the phase equilibrium of the waste acid wash/organic solution (A/O) is 1/3-2/3, total flow rate based on the phase equilibrium (A/O) being 3-4.2 mL/min per cm¬2 and a second step of reverse extracting nitric and fluoric acid from the above organic solution by water, wherein the pulse velocity (AxF) is 140-160 cm/min. while the phase equilibrium of the waste acid wash/organic solution (A/O) is 2/3-2, total flow rate based on the phase equilibrium (A/O) being 1.5-2 mL/min per cm¬2.
Abstract translation: 目的：通过含磷酸三丁酯的有机溶液从不锈钢的酸洗液中提取游离硝酸和氟化氢的方法。 有机溶液中的游离硝酸和氟酸随后由水反向萃取，进行连续回收。 该方法与常规搅拌分离方法相比，酸的回收率高，安装面积减小时处理量增加。 该方法是一种新型经济的柱提取方法，从废酸洗液中回收酸，尽量减少环境污染物的排放。 构成：提取方法包括：第一步，通过柱提取器，用含60-80％（v / v）磷酸三丁酯的有机溶液在不锈钢的酸洗液中提取游离硝酸和氟化氢，其中脉冲速度 AxF）为150-170cm / min，废酸洗涤/有机溶液（A / O）的相平衡为1 / 3-2 / 3，基于相平衡（A / O）的总流速为 3-4.2mL / min / cm 2，第二步用水从上述有机溶液中反萃取硝酸和氟酸，其中脉冲速度（AxF）为140-160cm / min。 而废酸洗/有机溶液（A / O）的相平衡为2 / 3-2，基于相平衡（A / O）的总流速为1.5-2mL / min / cm 2。
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公开(公告)号：KR1019990003691A
公开(公告)日：1999-01-15
申请号：KR1019970027619
申请日：1997-06-26
Applicant: 한국과학기술연구원
Abstract: 본 발명은 비소 오염 토양 및 폐기물을 가성소다 수용액을 사용하여 비소 성분을 용출한 다음, 여기에 염화칼슘을 첨가하여 수용액 중의 비소를 칼슘 비소 화합물로 침전시키는 것을 포함하는 비소 오염 토양 및 폐기물로부터 비소를 제거하는 방법에 관한 것이다.
본 발명의 방법을 이용하여 비소 오염 토양 및 폐기물을 처리하는 경우, 초기 함량 기준으로 95 % 이하의 비소를 용출시킬 수 있는 동시에, 수용액 중의 아세네이트를 최대 99.8 % 이하로 제거할 수 있게 된다.
또한, 본 발명의 방법으로 비소 오염 토양 및 폐기물을 처리하는 경우, 종래의 방법에 의한 경우에 비하여 처리 비용을 획기적으로 절감시킬 수 있다는 장점과 함께, 비소 성분을 안전하고 거의 완전히 제거할 수 있게 됨으로써, 비소에 의한 환경 오염을 방지할 수 있게 된다.-
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Patent Agency Ranking
公开(公告)号：KR1019970009279B1
公开(公告)日：1997-06-10
申请号：KR1019940016807
申请日：1994-07-13
Applicant: 한국과학기술연구원
IPC: A01G1/00
Abstract: The invention relates to a preparation for nursery bed soil which has enhanced water permeability, water holding ability and proper pH for nursery plants. The preparation comprises the steps of: 1)mixing 20-90wt% of a mineral clay, siliceous earth, having a particle size of below 5mm, 10-50wt% of zeolite and 0-30wt% of bentonite; 2)adding about 0.1-1.5wt% of water-soluble alum or aluminum sulfate to the mixture, so that pH and water content of the bed soil can be 3-7 and 15-50%, respectively; 3) palletizing particles obtained from 2) step at a particle size of below 10mm and agglomerate fine mineral clay.
Abstract translation: 本发明涉及一种育苗床土壤的制备方法，其具有增强的育苗植物的透水性，保水能力和适当的pH值。 该制剂包括以下步骤：1）混合20-90重量％的矿物粘土，硅土，粒度小于5mm，沸石10-50重量％和膨润土0-30重量％的硅土; 2）向混合物中加入约0.1-1.5重量％的水溶性明矾或硫酸铝，使床土的pH和含水量分别为3-7和15-50％; 3）从2）步骤获得的颗粒堆垛粒度小于10mm的颗粒，并且凝聚细矿物粘土。
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公开(公告)号：KR100475323B1
公开(公告)日：2005-03-10
申请号：KR1020020022397
申请日：2002-04-24
Applicant: 한국과학기술연구원
IPC: F15C1/04
Abstract: 본 발명은 화학반응장치 등으로 공급되는 액체의 유량을 정확하고 일정하게 조절할 수 있도록 하는 유량 조절장치에 관한 것이다. 유체저장용기와 제 1도관으로 연결되는 하나이상의 계량용기는 유체를 일정량만큼 계량하여 일시저장한다. 각 계량용기에는 계량용기내의 유체를 일정량으로 제한하는 유량제한수단이 구비된다. 계량용기와 제 2도관으로 연결되고, 계량용기로부터 유체를 공급받음과 동시에, 그 일측에 결합된 제 3도관으로 유체를 일정한 유량으로 배출하는 위치수두 조절용기가 설치된다. 제 1 및 제 2도관에는 유체의 유동방향을 결정하는 하나이상의 방향제어수단이 결합된다. 진동발생부재와 전기적으로 연결되는 제어장치는 진동발생부재의 펄스신호를 계수하여 소정 주기를 일정하게 유지하며, 주기에 따라 방향제어수단의 방향전환을 제어한다. 본원발명에서는 계량용기에 의해 정확하게 계량한 액체를 전자제어장치가 진동발생부재의 펄스신호를 계수하여 정확히 설정된 주기로 위치수두 조절용기에 공급함으로써, 위치수두 조절용기로부터 유체가 배출될 때, 평균유량이 장기간 정확하게 유지될 수 있게 된다.
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