Improvements relating to the treatment of water

    公开(公告)号:GB771221A

    公开(公告)日:1957-03-27

    申请号:GB2700155

    申请日:1955-09-21

    Abstract: In a process for removing carbonate from and softening water in which the water passes in series, first through a cation-exchange material having a preponderance of weakly acidic groups and charged with exchangeable hydrogen ions and then through a cation-exchange material having a preponderance of strongly acidic groups and charged with sodium ions, a fraction of the water by-passes the first cation-exchange material and passes direct to the second cation-exchange material. The volume of the fraction may be controlled automatically or manually. The hydrogen ion-exchange material may be a polymer of acrylic acid cross-linked with divinyl benzene, and the sodium ion-exchange material, a sulphonated polymer of styrene cross-linked with divinyl benzene.

    153.
    发明专利
    未知

    公开(公告)号:FR816448A

    公开(公告)日:1937-08-07

    申请号:FR816448D

    申请日:1937-01-18

    Abstract: Water-insoluble artificial aldehyde resins containing a sulphonic acid group or groups are manufactured by condensing an aromatic compound, containing at least one sulphonic acid group and having a tendency to condense, with an aldehyde or agent yielding it, or by treating an artificial aldehyde resin with a sulphonating agent. In examples: (1) phenol-p-sulphonic acid is condensed with formaldehyde; (2) phenol is sulphonated and the product is condensed with formaldehyde; (3) naphthalene is sulphonated and the product is condensed with formaldehyde; (4) a resin made by condensing m-phenylenediamine with formaldehyde is sulphonated with fuming sulphuric acid.ALSO:Cation exchange is effected in aqueous solutions by passing the solution through a water-insoluble artificial aldehyde resin (i.e. a resin prepared from aromatic compounds and aldehydes) containing a sulphonic acid group or groups, preferably one having a large internal surface and a granular structure. Regeneration may be effected by means of suitable acids or salt solutions. The resins may be prepared by condensing an aromatic compound, containing at least one sulphonic acid group and having a tendency to condense, with an aldehyde or agent yielding it, or by treating an artificial aldehyde resin with a sulphonating agent. In examples: (1) phenol-p-sulphonic acid is condensed with formaldehyde; the product may be used for extracting calcium chloride from solution, and regenerated with acid or common salt solution; (2) phenol is sulphonated and the product condensed with formaldehyde, yielding a product similar in properties to that of (1); (3) naphthalene is sulphonated and the product is condensed with formaldehyde; the product absorbs calcium and copper from solution; (4) a resin made by condensing m-phenylenediamine hydrochloride with formaldehyde is sulphonated with fuming sulphuric acid; the product absorbs copper from a dilute ammoniacal copper solution, e.g. the waste liquor from a copper artificial silk factory.

    Extracorporeal device and matrix for removing ammonia from biological fluids, methods and uses thereof

    公开(公告)号:IL303576B1

    公开(公告)日:2024-12-01

    申请号:IL30357623

    申请日:2023-06-08

    Applicant: PLAS FREE LTD

    Abstract: The present invention pertains to present invention relates to a device comprising conjugate/s, and uses thereof in depleting at least one amine, specifically ammonia from body fluids. The present disclosure further provides systems, apparatus, conjugates, plurality of conjugates, and methods. More specifically, the conjugate comprising a particle bonded to at least one linker comprising a chain of n carbon atoms covalently bonded to m carbonyl groups, and at least one trapping agent A covalently bonded to the mth carbonyl group, (Formula I) wherein, n is an integer within the range of 5 to 15, and m is an integer within the range of 5 to 10, wherein trapping agent A is characterized by having the ability to capture or bind amine. In some optional embodiments, the amine is at least one of methylamine, dimethylamine or trimethylamine. In some embodiments, the linker of the conjugate of the disclosed device comprises a straight chain alkane and m carbonyl groups

    Method and apparatus for reducing sodium content in cultivation water for plants and cultivation system comprising said apparatus

    公开(公告)号:NL2027567B1

    公开(公告)日:2022-09-14

    申请号:NL2027567

    申请日:2021-02-16

    Abstract: A method is presented for reducing sodium content of cultivation water for plants. This method comprising the steps of: contacting cultivation water with a cation exchange resin configured to capture at least sodium ions, resulting in an effluent C; contacting an aqueous solution S with the cation exchange resin to remove sodium ions from the cation exchange resin, resulting in an effluent S comprising sodium ions, the aqueous solution S comprising cations not being sodium ions and anions soluble in water with the cations; discharging the effluent S; contacting an aqueous solution R with the cation exchange resin to regenerate the cation exchange resin, resulting in an effluent R, the aqueous solution R comprising an acid; and recirculating at least one of the effluent C and the effluent R for use for plants. Further, an apparatus suitable for implementing said method is presented as well as a cultivation system for plants comprising said apparatus.

    SEPARAÇÃO DE OLIGOSACARÍDEOS NEUTROS DO CALDO DE FERMENTAÇÃO

    公开(公告)号:BR112022006341A2

    公开(公告)日:2022-06-28

    申请号:BR112022006341

    申请日:2020-10-01

    Applicant: GLYCOM AS

    Abstract: SEPARAÇÃO DE OLIGOSACARÍDEOS NEUTROS DO CALDO DE FERMENTAÇÃO. A presente invenção refere-se à separação e isolamento de oligossacarídeos de leite humano neutros (HMOs) do meio de reação em que são produzidos, preferencialmente a partir de um caldo de fermentação, compreendendo as etapas de: i) opcionalmente, centrifugação, microfiltração do meio de reação, ou filtração do meio de reação em um filtro prensa ou filtro de tambor para obter um meio de reação pré-tratado, ii) ajustar o pH do meio de reação pré-tratado da etapa i) ou o meio de reação diretamente para 3-6 e opcionalmente aquecer o meio de reação pré-tratado da etapa i) ou o meio de reação diretamente a 35-65°C, e iii) colocar em contato o meio de reação obtido na etapa ii) com uma membrana de ultrafiltração (UF) com um corte de peso molecular (MWCO) de 5-1000 kDa e coletar o permeado com a condição de que quando a etapa i) não for realizada, então a membrana de UF é uma membrana não polimérica.

    СПОСОБ ПОЛУЧЕНИЯ ИЗОТОПА

    公开(公告)号:RU2768732C2

    公开(公告)日:2022-03-24

    申请号:RU2018127822

    申请日:2016-12-29

    Applicant: BAYER AS

    Abstract: Изобретениеотноситсяк получениютория-227. Раскрытспособгенерирования227Th фармацевтическиприемлемойчистоты, включающий I) получениесмесигенератора, включающей227Ac,227Th и223Ra; II) загрузкууказаннойсмесигенераторанасильноосновнуюанионообменнуюсмолу; III) элюированиесмесиуказанных223Ra и227Ac изуказаннойсильноосновнойанионообменнойсмолы, применяяпервуюминеральнуюкислотув водномрастворе; IV) элюирование227Th изуказаннойсильноосновнойанионообменнойсмолы, применяявторуюминеральнуюкислотув водномрастворе, приэтомгенерируетпервыйраствор227Th, содержащийпримесь223Ra и227Ac; V) загрузкупервогораствора227Th насильнокислотнуюкатионообменнуюсмолу; VI) элюирование, поменьшеймере, частипримеси223Ra и227Ac изуказаннойсильнокислотнойкатионообменнойсмолы, применяятретьюминеральнуюкислотув водномрастворе; VII) элюирование227Th изуказаннойсильнокислотнойкатионообменнойсмолы, применяяпервыйводныйбуферныйраствор, чтобыобеспечитьвторойраствор227Th; VIII) загрузкувторогораствора227Th, элюированногонаэтапе VII) навторуюсильноосновнуюанионообменнуюсмолу; IX) элюирование223Ra и/или227Ac изуказаннойсильноосновнойанионообменнойсмолы, применяячетвертуюминеральнуюкислотув водномрастворе; и X) элюирование227Th изуказаннойсильноосновнойанионообменнойсмолы, применяяпятуюминеральнуюкислотув водномрастворе, чтобыобеспечитьтретийраствор227Th. Изобретениеобеспечиваетполучениетория-227 высокойрадиохимическойчистотыи потерюнебольшечем 0,05 % первоначального227Ac прикаждомциклерегенерации. 24 з.п. ф-лы, 2 табл., 2 пр., 1 ил.

    Composition and method for regenerating cation exchange resins

    公开(公告)号:IL286402D0

    公开(公告)日:2021-10-31

    申请号:IL28640221

    申请日:2021-09-14

    Applicant: TYGRUS LLC

    Abstract: A method for regeneration of ion exchange material employed in a water softening or conditioning system. The method includes the step of contacting the ion exchange material with an aqueous process fluid to yield a regenerated ion exchange material. At least one target material associated with the resin is removed. The target material includes at least one of the following: metal ions such as those that have been extracted from a source of hard water, ionically soluble organic compounds, active water borne pathogens.

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