公开(公告)号：US20240190746A1

公开(公告)日：2024-06-13

申请号：US18319300

申请日：2023-05-17

Applicant: Guangdong Honhor Semiconductor Equipment Co., Ltd.

Inventor： HSING-CHIN CHUNG ,  CHANG-CHENG LO ,  SHUYING HE

IPC: C02F9/20 ,  C02F1/58

CPC classification number: C02F9/20 ,  C02F1/583 ,  C02F2101/14

Abstract: The invention discloses a modularized fluoride-containing wastewater treating apparatus, comprising: a fluoride removal module, which is used to remove most of the fluoride in the high-concentration fluoride-containing wastewater transported to the fluoride removal module by cryolite crystallizing to generate a mixture of unextracted cryolite crystals and a low-concentration fluoride-containing wastewater; and an extracting module connected with the fluoride removal module, which is used to extract the mixture of unextracted cryolite crystals and a low-concentration fluoride-containing wastewater to separate cryolite crystals with a water content less than 60% or cryolite crystals with a water content less than 10% and a purity of 95%, a wastewater that meets the discharge standard and a condensed fluoride-containing liquid, wherein the condensed fluoride-containing liquid will be recycled to the fluoride removal module.

公开(公告)号：US11795076B2

公开(公告)日：2023-10-24

申请号：US17920816

申请日：2021-04-02

Applicant: Nanjing University

Inventor： Xin Jin ,  Cheng Gu

IPC: C02F1/58 ,  C02F1/28 ,  C02F1/68 ,  C02F101/36 ,  C07D209/14

CPC classification number: C02F1/583 ,  C02F1/285 ,  C02F1/68 ,  C02F2101/36 ,  C02F2305/00 ,  C07D209/14

Abstract: A synthesis method of an indole derivative capable of efficiently degrading a perfluorinated compound (PFC) and a use of the indole derivative are provided. The synthesis method includes dissolving an appropriate amount of indole, alkylamine, and formaldehyde in an ethanol solution, conducting a reaction at reflux under suitable conditions for a specified period of time with ZnCl2 or glacial acetic acid as a catalyst to form a reaction product, vacuum-drying the reaction product, and purifying the reaction product through column chromatography to obtain a novel indole derivative with a hydrophobic alkyl branch. The present indole derivative has some hydrophobicity and a positively charged amino group that can effectively capture PFCs in contaminated water to produce a sub-nanoscale self-assembled aggregate. Hydrated electrons generated by light irradiation can directly attack PFCs in the aggregate without long-distance mass transfer, improving the utilization rate of hydrated electrons and reduces the ratio of fed materials.

公开(公告)号：US11679999B2

公开(公告)日：2023-06-20

申请号：US18045493

申请日：2022-10-11

Applicant: GSI Environmental Inc.

Inventor： Charles J. Newell ,  Poonam R. Kulkarni ,  Hassan Javed ,  Nicholas W. Johnson ,  Stephen D. Richardson

IPC: C02F1/58 ,  C02F1/24 ,  C02F1/28 ,  C02F1/00 ,  C02F101/36 ,  C02F103/06

CPC classification number: C02F1/583 ,  C02F1/24 ,  C02F1/285 ,  C02F2001/007 ,  C02F2101/36 ,  C02F2103/06 ,  C02F2201/002 ,  C02F2305/04

Abstract: A method for the decontamination of water containing one or more PFAS, having the steps of generating colloidal gas aphrons (CGAs) by mixing a gas, water, and one or more surfactants together with high shear forces, introducing the CGAs and a PFAS-containing water in an enclosed space where the CGAs move upwards through the water due to their inherent buoyancy, allowing the plurality of CGAs to extract PFAS from the water, and separating the PFAS-containing CGAs from the surface of the water in the enclosed space for further treatment or disposal, leaving the water with lower PFAS concentrations in the vessel. The aphrons may be anionic or cationic and created by mixing speeds or surfactant concentration, and treatment may be with gas bubbles to remove PFAS from water gas bubbles or destruction of PFAS by plasma reactor or deployed in situ through wells into geologic ground formations.

公开(公告)号：US20230167055A1

公开(公告)日：2023-06-01

申请号：US17920816

申请日：2021-04-02

Applicant: Nanjing University

Inventor： Xin JIN ,  Cheng GU

IPC: C07D209/14 ,  C02F1/58

CPC classification number: C07D209/14 ,  C02F1/583 ,  C02F2101/36

Abstract: A synthesis method of an indole derivative capable of efficiently degrading a perfluorinated compound (PFC) and a use of the indole derivative are provided. The synthesis method includes dissolving an appropriate amount of indole, alkylamine, and formaldehyde in an ethanol solution, conducting a reaction at reflux under suitable conditions for a specified period of time with ZnCl2 or glacial acetic acid as a catalyst to form a reaction product, vacuum-drying the reaction product, and purifying the reaction product through column chromatography to obtain a novel indole derivative with a hydrophobic alkyl branch. The present indole derivative has some hydrophobicity and a positively charged amino group that can effectively capture PFCs in contaminated water to produce a sub-nanoscale self-assembled aggregate. Hydrated electrons generated by light irradiation can directly attack PFCs in the aggregate without long-distance mass transfer, improving the utilization rate of hydrated electrons and reduces the ratio of fed materials.

公开(公告)号：US20120288435A1

公开(公告)日：2012-11-15

申请号：US13467826

申请日：2012-05-09

Applicant: Taro Fukaya ,  Kenji Tsutsumi ,  Atsushi Yamazaki ,  Ichiro Yamanashi ,  Shuji Seki

Inventor： Taro Fukaya ,  Kenji Tsutsumi ,  Atsushi Yamazaki ,  Ichiro Yamanashi ,  Shuji Seki

IPC: C01F11/22 ,  B01J19/00 ,  C01F7/50

CPC classification number: C01B7/20 ,  C02F1/004 ,  C02F1/281 ,  C02F1/48 ,  C02F1/5236 ,  C02F1/5245 ,  C02F1/5281 ,  C02F1/583 ,  C02F9/00 ,  C02F2209/001

Abstract: According to one embodiment, a fluorine recovering apparatus includes a precipitating device allowing fluoride ion-containing water to react with calcium source to form precipitate, a mixing tank mixing a filter aid including particles of a magnetic material having a diameter of 0.5 to 5 μm with a dispersion medium to produce slurry, a filter aid feeder to the mixing tank, a solid-liquid separator with a filter depositing a filter aid layer, and depositing the precipitate on the filter aid layer, a cleaning mechanism removing the filter aid and the precipitate, a separating tank separating the filter aid and the precipitate, and a returning mechanism returning the filter aid to the filter aid feeder.

Abstract translation: 根据一个实施方案，氟回收装置包括使含氟离子的水与钙源反应形成沉淀物的沉淀装置，将包含直径为0.5至5微米的磁性材料的颗粒的助滤剂与包含直径为0.5至5微米的助滤剂的混合槽与 用于产生浆料的分散介质，向混合罐的助滤剂进料器，具有沉积助滤剂层的过滤器和将沉淀物沉积在助滤剂层上的固液分离器，去除助滤剂和沉淀物的清洁机构 分离助滤剂和沉淀物的分离罐和将助滤剂返回到助滤剂进料器的返回机构。

公开(公告)号：US06743957B2

公开(公告)日：2004-06-01

申请号：US10070756

申请日：2002-06-26

Applicant: Kiyoshi Fuda ,  Toshiaki Matsunaga ,  Takeshi Na Kamiya ,  Kota Omori

Inventor： Kiyoshi Fuda ,  Toshiaki Matsunaga ,  Takeshi Na Kamiya ,  Kota Omori

IPC: C07C1738

CPC classification number: C07C51/47 ,  C02F1/5236 ,  C02F1/5245 ,  C02F1/5254 ,  C02F1/583 ,  C02F1/66 ,  C02F2101/14 ,  C07C53/21

Abstract: Divalent and trivalent metal salts are added to the solution containing the fluorine compound and the polymer containing fluorine to precipitate the layered double hydroxide containing the fluorine compound between layers. At this time, the polymer containing fluorine suspended in the solution is also coagulated to precipitate. By these processes, the fluorine compound is fixed with high rate to separate from the solution with the polymer containing fluorine, and recovered if necessary. By this treatment process, the fluorine compound and the polymer containing fluorine, contained in the wastewater etc. can be separated easily, and the burden to environment or ecosystem can be reduced.

Abstract translation: 向含氟化合物和含氟聚合物的溶液中加入二价和三价金属盐，使层间含有氟化合物的层状双氢氧化物析出。 此时，含有悬浮在溶液中的氟的聚合物也凝结而沉淀。 通过这些方法，氟化合物以高速固定，与含氟聚合物的溶液分离，如果需要回收。 通过这种处理方法，可以容易地分离含有废水等的氟化合物和含氟聚合物，能够减轻对环境或生态系统的负担。

公开(公告)号：US06235257B1

公开(公告)日：2001-05-22

申请号：US08269979

申请日：1994-07-01

Applicant: Gordon F. Palm ,  R. George Hartig

Inventor： Gordon F. Palm ,  R. George Hartig

IPC: C01B2516

CPC classification number: C01B25/225 ,  C02F1/5236 ,  C02F1/583 ,  C02F1/66 ,  C02F2101/006 ,  Y02W10/37

Abstract: Modification of phosphoric acid manufacturing provides improved process waters: decontaminated water pH-adjusted to be only slightly acidic, scrubber process water, gypsum stack water, and a composite of the latter two waters. The composite water undergoes two-stage neutralization with clarification, eliminating precipitatable contaminants, in forming the pH-adjusted water, which in turn is useful in forming scrubber process water or gypsum stack water, as needed, Resulting gypsum stacks and rainfall surge ponds, having been made relatively fluoride-free through such processing modification, and preferably also having been lined, supersede previous gypsum stacks and acid gypsum ponds—whether lined or not.

Abstract translation: 磷酸制造的改进提供了改进的工艺用水：净化水pH调节至仅为微酸性，洗涤工艺水，石膏堆积水和后两个水的复合材料。 复合水通过澄清进行两级中和，消除可沉淀的污染物，形成pH调节的水，根据需要，其又可用于形成洗涤器工艺水或石膏堆水，所得的石膏堆和降雨量池，具有 通过这种处理改性使其相对无氟化，并且优选地也已经衬里，取代了之前的石膏堆和酸性石膏池 - 无论是否衬里。

公开(公告)号：US5980753A

公开(公告)日：1999-11-09

申请号：US558897

申请日：1995-11-16

Applicant: Mitsushi Itano ,  Tatsuya Unemoto

Inventor： Mitsushi Itano ,  Tatsuya Unemoto

IPC: C01B7/19 ,  B01D15/00 ,  B01D15/04 ,  B01J41/04 ,  C02F1/26 ,  C02F1/42 ,  C02F1/58 ,  C02F11/00

CPC classification number: C02F1/583 ,  B01J41/04 ,  B01J41/046 ,  C02F1/26 ,  C02F11/002

Abstract: The present invention provides a process for recovering a volatile acid charaterized by bringing a waste liquid containing the volatile acid into contact with an amine having a boiling point of at least 50.degree. C. to thereby cause the amine to tonically adsorb the acid from the waste liquid, and thereafter heating the amine to desorb the acid, and a process for treating waste water utilizing this process.

Abstract translation: 本发明提供一种通过使含有挥发性酸的废液与沸点为至少50℃的胺接触而回收挥发性酸的方法，由此使胺从废物中吸附酸 液体，然后加热胺以解吸酸，以及利用该方法处理废水的方法。

公开(公告)号：US5804076A

公开(公告)日：1998-09-08

申请号：US934742

申请日：1997-09-22

Applicant: Kazuyuki Yamasaki ,  Masaki Kataoka ,  Kazuyuki Sakata ,  Shirou Imazu

Inventor： Kazuyuki Yamasaki ,  Masaki Kataoka ,  Kazuyuki Sakata ,  Shirou Imazu

IPC: C02F3/04 ,  C02F1/20 ,  C02F1/28 ,  C02F1/52 ,  C02F1/56 ,  C02F1/58 ,  C02F3/06 ,  C02F3/10 ,  C02F9/00 ,  C02F11/12

CPC classification number: C02F1/281 ,  C02F1/583 ,  C02F3/043 ,  C02F2101/14 ,  Y02W10/15 ,  Y10S210/915

Abstract: A first reaction/adjustment tank has a lower portion containing a calcium carbonate mineral, an upper portion containing a calcium carbonate mineral and a plastic filler, and an air lift pump for circulating waste water from the lower portion to the upper portion. Exhaust gas is introduced into a space. A second reaction/adjustment tank has a lower portion containing a calcium carbonate mineral and charcoal, and an upper portion containing charcoal and a plastic filler. Waste water circulates sequentially through the lower and upper portions of the first reaction/adjustment tank, and the lower and upper portions of the second reaction/adjustment tank. Exhaust gas circulates sequentially through the upper portion of the first reaction/adjustment tank and the upper portion of the second reaction/adjustment tank.

Abstract translation: 第一反应/调节罐具有含有碳酸钙矿物的下部，含有碳酸钙矿物的上部和塑料填料，以及用于使废水从下部循环到上部的空气提升泵。 废气被引入空间。 第二反应/调节罐具有含有碳酸钙矿物和活性炭的下部，以及含有木炭和塑料填料的上部。 废水依次通过第一反应/调节罐的下部和上部以及第二反应/调节罐的下部和上部。 排气顺序地循环通过第一反应/调节罐的上部和第二反应/调节罐的上部。

公开(公告)号：US5750033A

公开(公告)日：1998-05-12

申请号：US690590

申请日：1996-07-31

Applicant: Kenichi Ikeda ,  Yuichi Asai ,  Yuji Arai

Inventor： Kenichi Ikeda ,  Yuichi Asai ,  Yuji Arai

IPC: B01D21/01 ,  C02F1/52 ,  C02F1/56 ,  C02F1/58 ,  C02F1/62 ,  C02F1/66 ,  C02F9/00

CPC classification number: C02F9/00 ,  C02F1/5236 ,  C02F1/5245 ,  C02F1/56 ,  C02F1/583 ,  C02F1/62 ,  C02F1/66 ,  C02F2101/14 ,  C02F2101/20 ,  Y10S210/912 ,  Y10S210/914 ,  Y10S210/915

Abstract: The invention relates to the treatment of waste water containing a harmful ion such as a heavy metal ion or fluorine ion by the coagulating sedimentation method using an inorganic coagulant such as an iron compound or an aluminum compound. After separating treated water from the sediment (sludge) in which the harmful ion is incorporated in insoluble form, the pH of a mixture of the sediment and water is suitably adjusted to cause elution of the harmful ion from the sediment. Then the sediment is separated from the eluate and reused as an inorganic coagulant. By reusing the sediment in this manner, the waste water treatment is accomplished without producing a large quantity of sludge and the consumption of inorganic coagulant and auxiliary chemicals can be greatly reduced, while the concentration of the harmful ion in the treated water becomes sufficiently low.