{"id":2513,"date":"2023-07-09T10:26:58","date_gmt":"2023-07-09T02:26:58","guid":{"rendered":"https:\/\/www.green-mountainchem.com\/?p=2513"},"modified":"2024-12-31T16:15:49","modified_gmt":"2024-12-31T08:15:49","slug":"hedp","status":"publish","type":"post","link":"https:\/\/www.green-mountainchem.com\/vi\/hedp\/","title":{"rendered":"HEDP"},"content":{"rendered":"\n

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

Synonym: Hydroxyethylenebisphosphonic acid<\/p>\n\n\n\n

CAS: 2809-21-4
C\u00f4ng th\u1ee9c ph\u00e2n t\u1eed: 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

HEDP l\u00e0 m\u1ed9t ch\u1ea5t chelating organophosphine \u0111i\u1ec3n h\u00ecnh, nh\u01b0 quy m\u00f4 x\u1eed l\u00fd n\u01b0\u1edbc v\u00e0 ch\u1ea5t \u1ee9c ch\u1ebf \u0103n m\u00f2n, ch\u1ea5t l\u00e0m s\u1ea1ch v\u00e0 t\u1ea9y c\u1eb7n, ch\u1ea5t chelating ion kim lo\u1ea1i, ch\u1ea5t t\u1ea1o ph\u1ee9c, v. v.
Hedp ph\u1ee9c h\u1ee3p c\u00e1c ion canxi v\u00e0 magi\u00ea trong n\u01b0\u1edbc c\u1ee9ng \u0111\u1ec3 t\u1ea1o th\u00e0nh c\u00e1c ph\u1ee9c h\u1ee3p kim lo\u1ea1i h\u00f2a tan, nh\u01b0 quy m\u00f4 x\u1eed l\u00fd n\u01b0\u1edbc v\u00e0 ch\u1ea5t \u1ee9c ch\u1ebf \u0103n m\u00f2n, ch\u1ea5t l\u00e0m s\u1ea1ch.
Hedp ph\u1ee9c h\u1ee3p s\u1eaft, \u0111\u1ed3ng, k\u1ebdm v\u00e0 c\u00e1c ion kim lo\u1ea1i kh\u00e1c, nh\u01b0 ch\u1ea5t chelating ion kim lo\u1ea1i, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c c\u00f4ng th\u1ee9c ch\u1ea5t t\u1ea9y r\u1eeda \/ ch\u1ea5t t\u1ea9y r\u1eeda c\u00f4ng nghi\u1ec7p v\u00e0 h\u00f3a h\u1ecdc h\u00e0ng ng\u00e0y, b\u1ed9t gi\u1ea5y, ph\u1ee5 tr\u1ee3 in v\u00e0 nhu\u1ed9m d\u1ec7t, x\u1eed l\u00fd b\u1ec1 m\u1eb7t kim lo\u1ea1i, v. v..<\/p>\n\n\n\n

Trong th\u1ef1c t\u1ebf, vi\u1ec7c s\u1eed d\u1ee5ng ch\u1ea5t l\u1ecfng hedp, hedp disodium, hedp tetrasodium.<\/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

T\u00ednh n\u0103ng:
1.nhi\u1ec7t \u0111\u1ed9 cao, kh\u00e1ng axit v\u00e0 ki\u1ec1m, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho ch\u1ea5t \u1ee9c ch\u1ebf quy m\u00f4 x\u1eed l\u00fd n\u01b0\u1edbc, ch\u1ea5t \u1ee9c ch\u1ebf \u0103n m\u00f2n, ch\u1ea5t t\u1ea9y c\u1eb7n, ch\u1ea5t l\u00e0m s\u1ea1ch, ch\u1ea5t t\u1ea1o ph\u1ee9c, v. v..<\/p>\n\n\n\n

HEDP \u1ed5n \u0111\u1ecbnh \u1edf nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 gi\u00e1 tr\u1ecb pH cao, \u1ee9c ch\u1ebf quy m\u00f4 t\u1ed1t \u1edf 200\u2103, ph\u00e2n h\u1ee7y tr\u00ean 250\u2103, kh\u00e1ng axit v\u00e0 ki\u1ec1m.<\/p>\n\n\n\n

2.HEDP v\u00e0 s\u1eaft, \u0111\u1ed3ng, magi\u00ea, nh\u00f4m, k\u1ebdm v\u00e0 c\u00e1c kim lo\u1ea1i kh\u00e1c \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t chelate h\u00f2a tan trong n\u01b0\u1edbc \u1ed5n \u0111\u1ecbnh.
HEDP c\u00f3 th\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t chelate s\u00e1u v\u00f2ng v\u1edbi c\u00e1c ion kim lo\u1ea1i trong n\u01b0\u1edbc, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c ion canxi, v\u1edbi t\u00e1c d\u1ee5ng \u1ee9c ch\u1ebf quy m\u00f4 t\u1ed1t, v\u00e0 c\u00f3 m\u1ed9t hi\u1ec7u \u1ee9ng ng\u01b0\u1ee1ng r\u00f5 r\u00e0ng (c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 hi\u1ec7u \u1ee9ng gi\u1edbi h\u1ea1n \u0111\u1ed9 h\u00f2a tan, sau khi s\u1eed d\u1ee5ng m\u1ed9t \u0111i\u1ec3m t\u1edbi h\u1ea1n, hi\u1ec7u \u1ee9ng \u1ee9c ch\u1ebf quy m\u00f4 c\u00f3<\/p>\n\n\n\n

3.Hedp v\u00e0 s\u1eed d\u1ee5ng h\u1ee3p ch\u1ea5t x\u1eed l\u00fd n\u01b0\u1edbc kh\u00e1c, cho th\u1ea5y hi\u1ec7u qu\u1ea3 hi\u1ec7p \u0111\u1ed3ng l\u00fd t\u01b0\u1edfng.
HEDP c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi axit hydroxyacetic, PAA, BTA, molypdate, copolymer, mu\u1ed1i k\u1ebdm, v. v., h\u1ee3p ch\u1ea5t x\u1eed l\u00fd n\u01b0\u1edbc ki\u1ec1m h\u1eefu c\u01a1 ho\u1eb7c ch\u1ea5t x\u1eed l\u00fd n\u01b0\u1edbc d\u1ef1a tr\u00ean k\u1ebdm ph\u1ed1t pho th\u1ea5p, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u ch\u1ea5t l\u01b0\u1ee3ng n\u01b0\u1edbc kh\u00e1c nhau c\u1ee7a h\u1ec7 th\u1ed1ng n\u01b0\u1edbc l\u00e0m m\u00e1t tu\u1ea7n ho\u00e0n.
HEDP ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m n\u01b0\u1edbc l\u00e0m m\u00e1t tu\u1ea7n ho\u00e0n c\u00f4ng nghi\u1ec7p, phun m\u1ecf d\u1ea7u v\u00e0 x\u1eed l\u00fd n\u01b0\u1edbc l\u00f2 h\u01a1i v\u1edbi molypdate, silicat, mu\u1ed1i k\u1ebdm v\u00e0 h\u1ee3p ch\u1ea5t copolymer, \u1ee9c ch\u1ebf \u0103n m\u00f2n, \u1ee9c ch\u1ebf quy m\u00f4.<\/p>\n\n\n\n

S\u1eed d\u1ee5ng:
\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong h\u1ec7 th\u1ed1ng n\u01b0\u1edbc l\u00e0m m\u00e1t tu\u1ea7n ho\u00e0n c\u00f4ng nghi\u1ec7p v\u00e0 n\u1ed3i h\u01a1i \u00e1p su\u1ea5t th\u1ea5p v\u00e0 trung b\u00ecnh;
\u1ee8c ch\u1ebf quy m\u00f4 v\u00e0 \u1ee9c ch\u1ebf \u0103n m\u00f2n m\u1ecf d\u1ea7u phun n\u01b0\u1edbc v\u00e0 \u0111\u01b0\u1eddng \u1ed1ng d\u1eabn d\u1ea7u;
Ch\u1ea5t l\u00e0m s\u1ea1ch cho v\u1eadt li\u1ec7u kim lo\u1ea1i v\u00e0 phi kim lo\u1ea1i, ch\u1ea5t l\u00e0m s\u1ea1ch c\u00f4ng nghi\u1ec7p;
Trong x\u00e0 ph\u00f2ng c\u00f4ng nghi\u1ec7p h\u00f3a ch\u1ea5t h\u00e0ng ng\u00e0y, ch\u1ea5t t\u1ea9y r\u1eeda nh\u01b0 ch\u1ea5t chelating ion kim lo\u1ea1i;
Trong in \u1ea5n v\u00e0 nhu\u1ed9m d\u1ec7t, ch\u1ea5t \u1ed5n \u0111\u1ecbnh peroxide v\u00e0 ch\u1ea5t c\u1ed1 \u0111\u1ecbnh m\u00e0u trong t\u1ea9y tr\u1eafng v\u00e0 nhu\u1ed9m;
Trong qu\u00e1 tr\u00ecnh m\u1ea1 kh\u00f4ng xyanua, nh\u01b0 m\u1ed9t t\u00e1c nh\u00e2n ph\u1ee9c t\u1ea1p, c\u00f3 th\u1ec3 h\u00f2a tan c\u00e1c oxit b\u1ec1 m\u1eb7t kim lo\u1ea1i.<\/p>\n\n\n\n

HEDP th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m ch\u1ea5t \u1ee9c ch\u1ebf quy m\u00f4 v\u1edbi n\u1ed3ng \u0111\u1ed9 1-10mg\/L, nh\u01b0 ch\u1ea5t \u1ee9c ch\u1ebf \u0103n m\u00f2n v\u1edbi n\u1ed3ng \u0111\u1ed9 10-50mg\/L; nh\u01b0 ch\u1ea5t l\u00e0m s\u1ea1ch v\u1edbi n\u1ed3ng \u0111\u1ed9 1000-2000mg\/L; th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi ch\u1ea5t \u1ee9c ch\u1ebf quy m\u00f4 lo\u1ea1i axit polycarboxylic v\u00e0 ch\u1ea5t ph\u00e2n t\u00e1n.<\/p>\n\n\n\n

N\u1ebfu b\u1ea1n c\u1ea7n m\u1ea1nh m\u1ebd h\u01a1n kh\u00e1ng ki\u1ec1m ho\u1eb7c kh\u00f4ng ph\u1ed1t pho chelating \u0111\u1ea1i l\u00fd, xin vui l\u00f2ng c\u1ea3m th\u1ea5y t\u1ef1 do \u0111\u1ec3 tham kh\u1ea3o \u00fd ki\u1ebfn ch\u00fang t\u00f4i.<\/p>\n\n\n\n

G\u00f3i v\u00e0 l\u01b0u tr\u1eef:
G\u00f3i trong tr\u1ed1ng nh\u1ef1a. M\u1ed7i tr\u1ed1ng 25kg ho\u1eb7c 30kg tr\u1ed1ng nh\u1ef1a nh\u1ecf; 125kg, ho\u1eb7c 250kg tr\u1ed1ng tr\u1ed1ng nh\u1ef1a; 1250KG IBC t\u1ea5n tr\u1ed1ng.
L\u01b0u tr\u1eef \u1edf n\u01a1i m\u00e1t m\u1ebb v\u00e0 th\u00f4ng gi\u00f3 trong nh\u00e0, ch\u1ed1ng \u1ea9m, th\u1eddi gian l\u01b0u tr\u1eef 12 th\u00e1ng.<\/p>\n\n\n\n

An to\u00e0n v\u00e0 b\u1ea3o v\u1ec7:
C\u00f3 t\u00ednh axit, n\u00ean tr\u00e1nh ti\u1ebfp x\u00fac v\u1edbi m\u1eaft v\u00e0 da, m\u1ed9t khi b\u1eafn tung t\u00f3e, n\u00ean \u0111\u01b0\u1ee3c r\u1eeda ngay l\u1eadp t\u1ee9c v\u1edbi nhi\u1ec1u n\u01b0\u1edbc.<\/p>\n\n\n\n

The following is the original English text |
Sau \u0111\u00e2y l\u00e0 v\u0103n b\u1ea3n g\u1ed1c ti\u1ebfng Anh:<\/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":"

    Hydroxyethylidene diphosphonic acid Synonym: Hydroxyethylenebisphosphonic acid CAS: 2809-21-4C\u00f4ng th\u1ee9c ph\u00e2n t\u1eed: C2H8O7P2 HEDP l\u00e0 m\u1ed9t ch\u1ea5t chelating organophosphine \u0111i\u1ec3n h\u00ecnh, nh\u01b0 quy m\u00f4 x\u1eed l\u00fd n\u01b0\u1edbc v\u00e0 ch\u1ea5t \u1ee9c ch\u1ebf \u0103n m\u00f2n, ch\u1ea5t l\u00e0m s\u1ea1ch v\u00e0 t\u1ea9y c\u1eb7n, ch\u1ea5t chelating ion kim lo\u1ea1i, ch\u1ea5t t\u1ea1o ph\u1ee9c, v. v.Hedp ph\u1ee9c h\u1ee3p c\u00e1c ion canxi v\u00e0 magi\u00ea […]<\/p>\n","protected":false},"author":1,"featured_media":4667,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_locale":"vi","_original_post":"https:\/\/www.green-mountainchem.com\/?p=2062","footnotes":""},"categories":[9,10],"tags":[14,427,75,310,84],"class_list":["post-2513","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","vi"],"_links":{"self":[{"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/posts\/2513","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=2513"}],"version-history":[{"count":0,"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/posts\/2513\/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=2513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/categories?post=2513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.green-mountainchem.com\/wp-json\/wp\/v2\/tags?post=2513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}