A process for the recovery of ªŠ-caprolactam and ªŠ-aminocaproic acid from caprolactam distillation residues

    公开(公告)号:GB834398A

    公开(公告)日:1960-05-04

    申请号:GB2537958

    申请日:1958-08-07

    Applicant: INVENTA AG

    Abstract: e -Caprolactam and e -aminocaproic acid are recovered from caprolactam distillation residues containing acid, basic and neutral impurities by treating an aqueous solution of the lactam residue successively, in either order, with strongly acid and strongly basic ion exchangers at below 40 DEG C., separating the aqueous lactam-containing solution and dissolving the aminocaproic acid from the exchanger first used. When a cation exchanger is first used, the aminocaproic acid is dissolved from it with aqueous ammonia; when an anion exchanger is first used, the aminocaproic acid is separated from it with aqueous carbonic acid under pressure. The exchangers may be regenerated with sulphuric acid, and the anion exchanger then activated with caustic soda. Specifications 703,019 and 762,879 are referred to.

    과산화수소 수용액의 정제 방법 및 정제 장치

    公开(公告)号:KR102407556B1

    公开(公告)日:2022-06-10

    申请号:KR1020197010416

    申请日:2017-09-19

    Abstract: 과산화수소수용액을, 고압형역침투막분리장치 (3) 로역침투막분리처리하는과산화수소수용액의정제방법. 고압형역침투막은, 저압형또는초저압형의역침투막에비해막 표면에치밀한스킨층이있기때문에, 단위조작압력당막 투과수량은낮기는하지만, TOC 와붕소의제거율은높다. 고압형역침투막투과수는, 또한겔형강이온교환수지를충전한, 2 탑이상으로이루어지는이온교환장치로이온교환처리하는것이바람직하다.

    과산화수소 수용액의 정제 방법 및 정제 장치

    公开(公告)号:KR102407558B1

    公开(公告)日:2022-06-10

    申请号:KR1020197010414

    申请日:2017-09-19

    Abstract: 과산화수소수용액을, 제1 H형강카티온교환수지탑 (1), 염형강아니온교환수지탑 (2), 및제2 H형강카티온교환수지탑 (3) 에순차통수하여정제하는방법에있어서, 제2 H형강카티온교환수지탑 (3) 의 H형강카티온교환수지로서, 가교도 6 % 이하, 또는가교도 9 % 이상, 혹은하기 (a) 및 (b) 의공정을거쳐제조된 H형강카티온교환수지를사용하는과산화수소수용액의정제방법. (a) 모노비닐방향족모노머와, 가교성방향족모노머중의비중합성의불순물함유량이 3 중량% 이하인가교성방향족모노머를, 특정한라디칼중합개시제의소정량을사용하여, 소정의중합온도에서공중합시켜가교공중합체를얻는공정 (b) 그가교공중합체를술폰화하는공정

    A SYSTEM AND METHOD FOR REMOVING LONG-CHAIN AND SHORT-CHAIN PER-AND POLYFLUOROALKYL SUBSTANCES (PFAS) FROM CONTAMINATED WATER

    公开(公告)号:AU2022219946A1

    公开(公告)日:2023-08-31

    申请号:AU2022219946

    申请日:2022-02-10

    Abstract: A system for removing long-chain and short-chain per- and polyfluoroalkyl substances (PFAS) from contaminated water using a regenerable anion exchange resin includes at least one first anion exchange resin vessel configured to receive a flow of water contaminated with long and short-chain PFAS compounds. The at least one first anion exchange resin vessel includes a first regenerable anion exchange resin therein having a high affinity for long-chain PFAS compounds configured such that a majority of the long-chain PFAS compounds sorb to the first regenerable anion exchange resin to remove a majority of the long-chain PFAS compounds from the contaminated water and produce a flow of water having a majority of the long-chain PFAS compounds removed. The system also include at least one second anion exchange resin vessel configured to receive the flow of water having a majority of the long-chain PFAS compounds removed.

    A SYSTEM AND METHOD FOR REMOVING LONG-CHAIN AND SHORT-CHAIN PER-AND POLYFLUOROALKYL SUBSTANCES (PFAS) FROM CONTAMINATED WATER

    公开(公告)号:CA3208048A1

    公开(公告)日:2022-08-18

    申请号:CA3208048

    申请日:2022-02-10

    Abstract: A system for removing long-chain and short-chain per- and polyfluoroalkyl substances (PFAS) from contaminated water using a regenerable anion exchange resin includes at least one first anion exchange resin vessel configured to receive a flow of water contaminated with long and short-chain PFAS compounds. The at least one first anion exchange resin vessel includes a first regenerable anion exchange resin therein having a high affinity for long-chain PFAS compounds configured such that a majority of the long-chain PFAS compounds sorb to the first regenerable anion exchange resin to remove a majority of the long-chain PFAS compounds from the contaminated water and produce a flow of water having a majority of the long-chain PFAS compounds removed. The system also include at least one second anion exchange resin vessel configured to receive the flow of water having a majority of the long-chain PFAS compounds removed.

    Procedimiento de purificación para disolvente orgánico hidrófilo

    公开(公告)号:ES2877091T3

    公开(公告)日:2021-11-16

    申请号:ES16845332

    申请日:2016-12-16

    Abstract: Un método para eliminar la contaminación iónica de un disolvente orgánico hidrófilo, comprendiendo el método: poner en contacto el disolvente orgánico hidrófilo con un lecho mixto de resinas de intercambio iónico que comprende resinas de intercambio iónico catiónicas y resinas de intercambio iónico aniónicas, en donde: (a) las resinas de intercambio iónico catiónicas son resinas de intercambio iónico catiónicas de ácido fuerte de forma de hidrógeno (H) con una capacidad de retención de humedad de 40 a 55% en peso, y (b) tanto las resinas de intercambio iónico catiónicas como las resinas de intercambio iónico aniónicas tienen una porosidad de 0.001 a 0.1 cm3/g, un tamaño de poros medio de 0.001 a 1.7 nm y una superficie específica por el método B.E.T. de 0.001 a 10 m2/g; en donde la capacidad de retención de humedad se mide como se describe en la descripción; la porosidad, tamaño medio de poros y superficie específica por el método B.E.T. se miden por el método de adsorción de nitrógeno mostrado en la norma ISO 15901-2.

    СПОСОБЫ ПОЛУЧЕНИЯ УГЛЕВОДОРОДНЫХ КОМПОЗИЦИЙ С ПОНИЖЕННЫМ КИСЛОТНЫМ ЧИСЛОМ И ДЛЯ ВЫДЕЛЕНИЯ КОРОТКОЦЕПОЧЕЧНЫХ ЖИРНЫХ КИСЛОТ

    公开(公告)号:RU2749418C2

    公开(公告)日:2021-06-09

    申请号:RU2019104895

    申请日:2017-07-21

    Applicant: UNIV ALBERTA

    Inventor: BRESSLER DAVID

    Abstract: Изобретениеотноситсяк способуполученияуглеводородовизисточникажирныхкислот, включающему (a)нагреваниеисточникажирныхкислотс получениемпервойкомпозиции, содержащейуглеводородыи поменьшеймереоднусвободнуюкороткоцепочечнуюжирнуюкислоту; и (b)отделениепоменьшеймереоднойсвободнойкороткоцепочечнойжирнойкислотыизпервойкомпозициипосредствомпроцессаадсорбцииилипроцессаионногообмена. Описанныездесьспособыобеспечиваютэффективныйспособудаленияи выделениякороткоцепочечныхжирныхкислотизуглеводородов, которыеобразуютсяпринагреванииисточникажирныхкислот. Короткоцепочечныежирныекислотымогутнепрерывновыделятьсяи подаватьсяв реакторпиролиза, что, всвоюочередь, повышаетобщуюэффективностьполученияуглеводородов. Вкачествеальтернативы, короткоцепочечныежирныекислотымогутбытьвыделеныи использованыв другихприменениях. 27 з.п. ф-лы, 2 табл., 5 ил.

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