{"id":2505,"date":"2023-07-09T10:02:09","date_gmt":"2023-07-09T02:02:09","guid":{"rendered":"https:\/\/www.green-mountainchem.com\/?p=2505"},"modified":"2024-06-21T15:22:54","modified_gmt":"2024-06-21T07:22:54","slug":"hedp","status":"publish","type":"post","link":"https:\/\/www.green-mountainchem.com\/fr\/hedp\/","title":{"rendered":"HEDP"},"content":{"rendered":"\n

Etidronic acid; 1-Hydroxyethane-1,1-diylbis(phosphonic acid);<\/p>\n\n\n\n

Chemical Substance Name: 1-Hydroxyethane-1,1-diylbis(phosphonic acid)
Num\u00e9ro CAS : 2809-21-4
Formule mol\u00e9culaire : C2H8O7P2
Synonym:
1-Hydroxyethane-1,1-diphosphonic acid;
1-Hydroxyethylidene-1,1-diphosphonic acid;
etidronic acid;<\/p>\n\n\n\n

ch\u00e9lateurs de phosphate.
Le HEDP est un agent ch\u00e9lateur organophosphin\u00e9 typique, utilis\u00e9 comme inhibiteur de calcaire et de corrosion dans le traitement de l’eau, comme agent de nettoyage et de d\u00e9tartrage, comme agent ch\u00e9lateur des ions m\u00e9talliques, comme agent complexant, etc.
Le HEDP complexe les ions calcium et magn\u00e9sium dans l’eau dure pour former des complexes m\u00e9talliques solubles, comme inhibiteur de calcaire et de corrosion pour le traitement de l’eau, comme agent de nettoyage.
Le HEDP complexe le fer, le cuivre, le zinc et d’autres ions m\u00e9talliques, en tant qu’agent ch\u00e9lateur d’ions m\u00e9talliques, utilis\u00e9 dans les formulations quotidiennes de d\u00e9tergents chimiques et industriels, la p\u00e2te \u00e0 papier, les auxiliaires d’impression et de teinture des textiles, le traitement de surface des m\u00e9taux, etc.<\/p>\n\n\n\n

Dans la pratique, on utilise le HEDP, le HEDP disodique, le HEDP t\u00e9trasodique liquide.<\/p>\n\n\n\n

Abbreviation<\/td>HEDP Liquid<\/strong><\/td>HEDP Solid<\/strong><\/td><\/tr>
Appearance<\/td>Colorless to pale yellow transparant liquid<\/td>White crystalline powder<\/td><\/tr>
Active content (as HEDP)<\/td>60% min.<\/td>90% min.<\/td><\/tr>
Phosphoric acid, as PO4<\/sub>3-<\/sup><\/td>0.8% max.<\/td>0.5% max.<\/td><\/tr>
Phosphorous Acid, as PO3<\/sub>3-<\/sup><\/td>2.0% max.<\/td>0.8% max.<\/td><\/tr>
chloride, as Cl–<\/sup><\/td>250 \u03bcg\/g (ppm) max.<\/td>100 ppm max.<\/td><\/tr>
pH, 10g\/L, 1% water solution<\/td>2.0 max.<\/td>2.0 max.<\/td><\/tr>
Density, 20\u2103<\/td>1.4 g\/cm3<\/sup><\/td>—<\/td><\/tr>
Iron, as Fe<\/td>20 ppm max.<\/td>10 ppm max.<\/td><\/tr>
Chelation value, mg CaCO3<\/sub> \/g HEDP<\/td>500 min.<\/td>—<\/td><\/tr><\/tbody><\/table>
HEDP Acid, CAS No.: 2809-21-4<\/em><\/figcaption><\/figure>\n\n\n\n

Caract\u00e9ristiques :<\/p>\n\n\n\n

1.Haute temp\u00e9rature, r\u00e9sistance \u00e0 l’acide et \u00e0 l’alcali, peut \u00eatre utilis\u00e9 pour le traitement de l’eau comme inhibiteur de tartre, inhibiteur de corrosion, agent de d\u00e9tartrage, agent de nettoyage, agent complexant, etc.
Le HEDP est stable \u00e0 haute temp\u00e9rature et \u00e0 pH \u00e9lev\u00e9, bonne inhibition du tartre \u00e0 200\u2103, d\u00e9composition au-dessus de 250\u2103, r\u00e9sistant \u00e0 l’acide et \u00e0 l’alcali.<\/p>\n\n\n\n

    \n
  1. le HEDP et le fer, le cuivre, le magn\u00e9sium, l’aluminium, le zinc et d’autres m\u00e9taux forment un ch\u00e9late stable et soluble dans l’eau.
    Le HEDP peut former un ch\u00e9late \u00e0 six anneaux avec les ions m\u00e9talliques dans l’eau, en particulier les ions calcium, avec un bon effet d’inhibition de l’entartrage, et il y a un effet de seuil \u00e9vident (\u00e9galement connu sous le nom d’effet de limite de solubilit\u00e9, apr\u00e8s l’utilisation d’un point critique, l’effet d’inhibition de l’entartrage peut \u00eatre augment\u00e9 de mani\u00e8re non lin\u00e9aire de mani\u00e8re significative).<\/li>\n<\/ol>\n\n\n\n

    3.L’utilisation du HEDP et d’autres agents de traitement de l’eau montre un effet synergique id\u00e9al.
    Le HEDP peut \u00eatre utilis\u00e9 avec l’acide hydroxyac\u00e9tique, le PAA, le BTA, le molybdate, le copolym\u00e8re, le sel de zinc, etc., un agent de traitement de l’eau alcalin organique compos\u00e9 ou un agent de traitement de l’eau \u00e0 base de zinc \u00e0 faible teneur en phosphore, peut \u00eatre utilis\u00e9 dans une vari\u00e9t\u00e9 de qualit\u00e9s d’eau diff\u00e9rentes du syst\u00e8me de circulation de l’eau de refroidissement.
    Le HEDP est principalement utilis\u00e9 pour le traitement de l’eau de refroidissement en circulation dans l’industrie, l’injection dans les champs p\u00e9trolif\u00e8res et l’eau des chaudi\u00e8res avec du molybdate, du silicate, du sel de zinc et des compos\u00e9s copolym\u00e8res, pour l’inhibition de la corrosion et de l’entartrage.<\/p>\n\n\n\n

    Utilisations :
    Largement utilis\u00e9 dans les syst\u00e8mes industriels de circulation d’eau de refroidissement et dans les chaudi\u00e8res \u00e0 basse et moyenne pression ;
    Inhibition de l’entartrage et de la corrosion de l’eau d’injection des champs p\u00e9trolif\u00e8res et des ol\u00e9oducs ;
    Agent de nettoyage pour les mat\u00e9riaux m\u00e9talliques et non m\u00e9talliques, agent de nettoyage industriel ;
    Dans l’industrie chimique quotidienne, savon, d\u00e9tergent comme agent ch\u00e9lateur des ions m\u00e9talliques ;
    Dans l’impression et la teinture des textiles, stabilisateur de peroxyde et agent de fixation des couleurs dans le blanchiment et la teinture ;
    Dans le processus de placage sans cyanure, en tant qu’agent complexant, il peut dissoudre les oxydes de surface des m\u00e9taux.<\/p>\n\n\n\n

    Le HEDP est g\u00e9n\u00e9ralement utilis\u00e9 comme inhibiteur de calcaire \u00e0 une concentration de 1-10mg\/L, comme inhibiteur de corrosion \u00e0 une concentration de 10-50mg\/L ; comme agent de nettoyage \u00e0 une concentration de 1000-2000mg\/L ; il est g\u00e9n\u00e9ralement utilis\u00e9 avec un inhibiteur de calcaire et un dispersant de type acide polycarboxylique.<\/p>\n\n\n\n

    Si vous avez besoin d’une plus grande r\u00e9sistance aux alcalis ou d’un agent ch\u00e9lateur sans phosphore, n’h\u00e9sitez pas \u00e0 nous consulter.<\/p>\n\n\n\n

    Emballage et stockage :
    Emballage dans des f\u00fbts en plastique. Chaque f\u00fbt est un petit f\u00fbt en plastique de 25 kg ou 30 kg ; un f\u00fbt en plastique de 125 kg ou 250 kg ; un f\u00fbt IBC de 1250 kg.
    Stocker dans un endroit frais et ventil\u00e9 \u00e0 l’int\u00e9rieur, \u00e0 l’abri de l’humidit\u00e9, p\u00e9riode de stockage de 12 mois.<\/p>\n\n\n\n

    S\u00e9curit\u00e9 et protection :
    Acide, \u00e9viter le contact avec les yeux et la peau, en cas d’\u00e9claboussures, rincer imm\u00e9diatement et abondamment \u00e0 l’eau.<\/p>\n\n\n\n

    Voici le texte original en anglais
    Next is the original English text<\/strong>:<\/p>\n\n\n\n

    Hydroxyethylidene diphosphonic acid<\/p>\n\n\n\n

    Synonym: Hydroxyethylenebisphosphonic acid
    CAS No.: 2809-21-4
    Molecular formula: C2H8O7P2
    Relative molecular mass: 206.03<\/p>\n\n\n\n

    HEDP is a typical organophosphine chelating agent, as water treatment scale and corrosion inhibitor, cleaning and descaling agent, metal ion chelating agent, complexing agent, etc.
    HEDP complexes calcium and magnesium ions <\/strong>in hard water to form soluble metal complexes, as water treatment scale and corrosion inhibitor, cleaning agent.
    HEDP complexes iron, copper, zinc and other metal ions<\/strong>, as metal ion chelating agent, used in daily chemical and industrial detergent \/ detergent formulations, paper pulp, textile printing and dyeing auxiliaries, metal surface treatment, etc..<\/p>\n\n\n\n

    In practice, the use of HEDP, HEDP disodium, HEDP tetrasodium liquid.<\/p>\n\n\n\n

    Features<\/strong><\/p>\n\n\n\n

      \n
    1. high temperature, acid and alkali resistance<\/strong>, can be used for water treatment scale inhibitor, corrosion inhibitor, descaling agent, cleaning agent, complexing agent, etc..
      HEDP is stable at high temperature and high pH value, good scale inhibition at 200\u2103, decomposition above 250\u2103, acid and alkali resistant.<\/li>\n\n\n\n
    2. HEDP and iron, copper, magnesium, aluminum, zinc and other metals<\/strong> to form a stable water-soluble chelate.
      HEDP can form a six-ring chelate with metal ions in water, especially calcium ions, with a good scale inhibition effect, and there is an obvious threshold effect (also known as the solubility limit effect, after the use of a critical point, scale inhibition effect can be non-linearly increased significantly).<\/li>\n\n\n\n
    3. HEDP and other water treatment agent compound use<\/strong>, showing the ideal synergistic effect.
      HEDP can be used with hydroxyacetic acid, PAA, BTA, molybdate, copolymer, zinc salt, etc., compound organic alkaline water treatment agent or low phosphorus zinc-based water treatment agent, can be used in a variety of different water quality of circulating cooling water system.
      HEDP is mainly used as industrial circulating cooling water, oilfield injection and boiler water treatment with molybdate, silicate, zinc salt and copolymer compound, corrosion inhibition, scale inhibition.<\/li>\n<\/ol>\n\n\n\n

      Application<\/strong>
      Widely used in industrial circulating cooling water systems and low and medium pressure boilers;
      Scale inhibition and corrosion inhibition of oilfield water injection and oil pipeline;
      Cleaning agent for metal and non-metal materials, industrial cleaning agent;
      In the daily chemical industry soap, detergent as metal ion chelating agent;
      In textile printing and dyeing, peroxide stabilizer and color fixing agent in bleaching and dyeing;
      In the non-cyanide plating process, as a complexing agent, can dissolve metal surface oxides.<\/p>\n\n\n\n

      HEDP is generally used as scale inhibitor with concentration of 1-10mg\/L, as corrosion inhibitor with concentration of 10-50mg\/L; as cleaning agent with concentration of 1000-2000mg\/L; usually used with polycarboxylic acid type scale inhibitor and dispersant.<\/p>\n\n\n\n

      If you need stronger alkali resistance or non-phosphorus chelating agent, please feel free to consult us.<\/p>\n\n\n\n

      Package and storage
      <\/strong>Package in plastic drums. Each drum 25kg or 30kg small plastic drum; 125kg, or 250kg drum plastic drum; 1250kg IBC ton drum.
      Store in a cool and ventilated place indoors, moisture-proof, storage period of 12 months.<\/p>\n\n\n\n

      Safety and protection
      <\/strong>Acidic, should avoid contact with eyes and skin, once splashed, should be immediately flushed with plenty of water.<\/p>\n","protected":false},"excerpt":{"rendered":"

      CAS : 2809-21-4; Etidronic acid; ch\u00e9lateurs de phosphate;
      \nProduits chimiques de traitement de l\u2019eau; d\u2019adoucissement, de pr\u00e9cipitation et de s\u00e9questration;<\/p>\n","protected":false},"author":1,"featured_media":4667,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_locale":"fr_FR","_original_post":"https:\/\/www.green-mountainchem.com\/?p=2062","footnotes":""},"categories":[9,10],"tags":[14,427,460,75,310,84],"class_list":["post-2505","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-conventional-chelating-agents","category-water-treatment","tag-chelating-agent","tag-complexing-agent","tag-cosmetic-ingredient","tag-hedp","tag-sequestering-agent","tag-water-treatment-chemicals","fr-FR"],"_links":{"self":[{"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/posts\/2505","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/comments?post=2505"}],"version-history":[{"count":0,"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/posts\/2505\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/media\/4667"}],"wp:attachment":[{"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/media?parent=2505"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/categories?post=2505"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/tags?post=2505"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}