{"id":2507,"date":"2023-07-09T10:09:30","date_gmt":"2023-07-09T02:09:30","guid":{"rendered":"https:\/\/www.green-mountainchem.com\/?p=2507"},"modified":"2024-03-29T15:20:38","modified_gmt":"2024-03-29T07:20:38","slug":"hedp","status":"publish","type":"post","link":"https:\/\/www.green-mountainchem.com\/pt\/hedp\/","title":{"rendered":"HEDP"},"content":{"rendered":"\n

Chemical Substance Name: 1-Hydroxyethane-1,1-diylbis(phosphonic acid)
Molecular Formula: C2H8O7P2
Molecular Weight: 206<\/p>\n\n\n\n

Synonym:
1-Hydroxyethane-1,1-diphosphonic acid;
1-Hydroxyethylidene-1,1-diphosphonic acid;
etidronic acid;<\/p>\n\n\n\n

\u00c1cido hidroxietilideno difosf\u00f4nico<\/p>\n\n\n\n

Sin\u00f4nimo: \u00c1cido hidroxietilenobifosf\u00f4nico
N\u00famero CAS: 2809-21-4
F\u00f3rmula molecular: C2H8O7P2<\/p>\n\n\n\n

\n
\"HEDP-solid\"
HEDP-solid<\/figcaption><\/figure>\n\n\n\n
\"etidronic-acid_solid\"\n\t\t\t\n\t\t\t\t\n\t\t\t<\/svg>\n\t\t<\/button>
etidronic-acid_solid<\/figcaption><\/figure>\n<\/figure>\n\n\n\n

O HEDP \u00e9 um agente quelante organofosf\u00ednico t\u00edpico, como inibidor de corros\u00e3o e incrusta\u00e7\u00e3o para tratamento de \u00e1gua, agente de limpeza e desincrusta\u00e7\u00e3o, agente quelante de \u00edons met\u00e1licos, agente complexante, etc.
O HEDP complexa \u00edons de c\u00e1lcio e magn\u00e9sio em \u00e1gua dura para formar complexos met\u00e1licos sol\u00faveis, como inibidor de corros\u00e3o e incrusta\u00e7\u00e3o para tratamento de \u00e1gua e agente de limpeza.
Os complexos de HEDP complexam ferro, cobre, zinco e outros \u00edons met\u00e1licos, como agente quelante de \u00edons met\u00e1licos, usados em formula\u00e7\u00f5es de detergentes qu\u00edmicos e industriais di\u00e1rios, polpa de papel, auxiliares de impress\u00e3o e tingimento de t\u00eaxteis, tratamento de superf\u00edcies met\u00e1licas, etc.<\/p>\n\n\n\n

Na pr\u00e1tica, o uso de HEDP, HEDP diss\u00f3dico, HEDP tetrass\u00f3dico l\u00edquido.<\/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

Caracter\u00edsticas:<\/p>\n\n\n\n

    \n
  1. Alta temperatura, resist\u00eancia a \u00e1cidos e \u00e1lcalis, pode ser usado para inibidor de incrusta\u00e7\u00e3o de tratamento de \u00e1gua, inibidor de corros\u00e3o, agente de descalcifica\u00e7\u00e3o, agente de limpeza, agente complexante, etc.
    O HEDP \u00e9 est\u00e1vel em alta temperatura e alto valor de pH, boa inibi\u00e7\u00e3o de incrusta\u00e7\u00f5es a 200\u00b0C, decomposi\u00e7\u00e3o acima de 250\u00b0C, resistente a \u00e1cidos e \u00e1lcalis.<\/li>\n\n\n\n
  2. HEDP e ferro, cobre, magn\u00e9sio, alum\u00ednio, zinco e outros metais para formar um quelato est\u00e1vel sol\u00favel em \u00e1gua.
    O HEDP pode formar um quelato de seis an\u00e9is com \u00edons met\u00e1licos na \u00e1gua, especialmente \u00edons de c\u00e1lcio, com um bom efeito de inibi\u00e7\u00e3o de incrusta\u00e7\u00f5es, e h\u00e1 um efeito de limiar \u00f3bvio (tamb\u00e9m conhecido como efeito de limite de solubilidade, ap\u00f3s o uso de um ponto cr\u00edtico, o efeito de inibi\u00e7\u00e3o de incrusta\u00e7\u00f5es pode ser aumentado significativamente de forma n\u00e3o linear).<\/li>\n\n\n\n
  3. uso de HEDP e outros compostos de agentes de tratamento de \u00e1gua, mostrando o efeito sin\u00e9rgico ideal.
    O HEDP pode ser usado com \u00e1cido hidroxiac\u00e9tico, PAA, BTA, molibdato, copol\u00edmero, sal de zinco, etc., agente de tratamento de \u00e1gua alcalino org\u00e2nico composto ou agente de tratamento de \u00e1gua \u00e0 base de zinco com baixo teor de f\u00f3sforo, podendo ser usado em uma variedade de diferentes qualidades de \u00e1gua do sistema de circula\u00e7\u00e3o de \u00e1gua de resfriamento.
    O HEDP \u00e9 usado principalmente como \u00e1gua de resfriamento de circula\u00e7\u00e3o industrial, inje\u00e7\u00e3o em campos petrol\u00edferos e tratamento de \u00e1gua de caldeira com molibdato, silicato, sal de zinco e composto de copol\u00edmero, inibi\u00e7\u00e3o de corros\u00e3o e inibi\u00e7\u00e3o de incrusta\u00e7\u00e3o.<\/li>\n<\/ol>\n\n\n\n

    Usos:
    Amplamente utilizado em sistemas industriais de circula\u00e7\u00e3o de \u00e1gua de resfriamento e caldeiras de baixa e m\u00e9dia press\u00e3o;
    Inibi\u00e7\u00e3o de incrusta\u00e7\u00f5es e inibi\u00e7\u00e3o de corros\u00e3o de inje\u00e7\u00e3o de \u00e1gua em campos petrol\u00edferos e oleodutos;
    Agente de limpeza para materiais met\u00e1licos e n\u00e3o met\u00e1licos, agente de limpeza industrial;
    Na ind\u00fastria qu\u00edmica di\u00e1ria, sab\u00e3o, detergente como agente quelante de \u00edons met\u00e1licos;
    Na impress\u00e3o e tingimento de t\u00eaxteis, estabilizador de per\u00f3xido e agente de fixa\u00e7\u00e3o de cores no branqueamento e tingimento;
    No processo de galvaniza\u00e7\u00e3o sem cianeto, como um agente complexante, pode dissolver \u00f3xidos de superf\u00edcie de metal.<\/p>\n\n\n\n

    O HEDP \u00e9 geralmente usado como inibidor de incrusta\u00e7\u00e3o com concentra\u00e7\u00e3o de 1-10mg\/L, como inibidor de corros\u00e3o com concentra\u00e7\u00e3o de 10-50mg\/L; como agente de limpeza com concentra\u00e7\u00e3o de 1000-2000mg\/L; geralmente usado com inibidor de incrusta\u00e7\u00e3o do tipo \u00e1cido policarbox\u00edlico e dispersante.<\/p>\n\n\n\n

    Se precisar de uma resist\u00eancia alcalina mais forte ou de um agente quelante sem f\u00f3sforo, n\u00e3o hesite em nos consultar.<\/p>\n\n\n\n

    Embalagem e armazenamento:
    Embalagem em tambores de pl\u00e1stico. Cada tambor tem 25 kg ou 30 kg de tambor de pl\u00e1stico pequeno; tambor de pl\u00e1stico de 125 kg ou 250 kg; tambor de tonelada IBC de 1250 kg.
    Armazene em local fresco e ventilado, dentro de casa, \u00e0 prova de umidade, per\u00edodo de armazenamento de 12 meses.<\/p>\n\n\n\n

    Seguran\u00e7a e prote\u00e7\u00e3o:
    \u00c1cido, deve ser evitado o contato com os olhos e a pele; uma vez respingado, deve ser imediatamente lavado com \u00e1gua em abund\u00e2ncia.<\/p>\n\n\n\n

    O texto original em ingl\u00eas \u00e9 o seguinte
    (The following 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":"

      HEDP, CAS 2809-21-4; organofosf\u00ednico Agente quelante; Produtos Qu\u00edmicos para Tratamento de \u00c1gua;<\/p>\n","protected":false},"author":1,"featured_media":4667,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_locale":"pt_BR","_original_post":"https:\/\/www.green-mountainchem.com\/?p=2062","footnotes":""},"categories":[9,10],"tags":[14,427,75,310,84],"class_list":["post-2507","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-hedp","tag-sequestering-agent","tag-water-treatment-chemicals","pt-BR"],"_links":{"self":[{"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/posts\/2507","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=2507"}],"version-history":[{"count":0,"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/posts\/2507\/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=2507"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/categories?post=2507"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/tags?post=2507"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}