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Non-phosphorus composite corrosion and scale inhibitor suitable for industrial circulating cooling water

A corrosion and scale inhibitor, circulating cooling water technology, applied in the direction of descaling and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems such as sodium molybdate hindering the promotion, and achieve scale inhibition The formation, cheap effect

Active Publication Date: 2013-12-18
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent (03137272.4) provides a phosphorus-free corrosion and scale inhibitor mainly composed of sodium gluconate, zinc salt, (sulfamic acid + polyaspartic acid + organic base + maleic anhydride) reaction product, but its final There is a certain uncertainty in the composition, and when it is applied to carbon steel, it needs to be pre-coated first.
However, the relatively expensive price of sodium molybdate hinders its promotion

Method used

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  • Non-phosphorus composite corrosion and scale inhibitor suitable for industrial circulating cooling water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Select raw materials by weight percentage

[0023] Naphthalene Sulfonate Sodium Formaldehyde Condensate (SNF) 45%,

[0024] Acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer (AA / AMPS) 5%,

[0025] Polyepoxysuccinic Acid (PESA) 10%,

[0026] Zinc salt (ZnSO 4 ·7H 2 O) 9.5%,

[0027] Benzotriazole (BTA) 0.7%,

[0028] The rest is water.

[0029] Add water, sodium naphthalenesulfonate formaldehyde condensate, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, polyepoxysuccinic acid, zinc salt and azole compounds into the container in sequence. After stirring for 2 hours, a phosphorus-free composite corrosion and scale inhibitor was obtained.

[0030] The above-mentioned non-phosphorus corrosion and scale inhibitor formula 1 was applied to water replenishment in Wanfang, Jiaozuo, Henan in Table 1, and corrosion and scale inhibition experiments were carried out.

Embodiment 2

[0032] Select raw materials by weight percentage

[0033] Sodium naphthalenesulfonate formaldehyde condensate (SNF) 28%,

[0034] Acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer (AA / AMPS) 15%,

[0035] Polyepoxysuccinic Acid (PESA) 10%,

[0036] Zinc salt (ZnSO 4 ·7H 2 O) 11%,

[0037] Benzotriazole (BTA) 0.5%,

[0038] The rest is water.

[0039] Add water, sodium naphthalenesulfonate formaldehyde condensate, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, polyepoxysuccinic acid, zinc salt and azole compounds into the container in sequence. After stirring for 1 hour, a phosphorus-free composite corrosion and scale inhibitor was obtained.

[0040] The above-mentioned non-phosphorus corrosion and scale inhibitor formula 2 was applied to the surface water I in Tengzhou, Shandong in Table 1, and the corrosion and scale inhibition experiments were carried out.

Embodiment 3

[0042] Select raw materials by weight percentage

[0043] Naphthalene Sulfonate Sodium Formaldehyde Condensate (SNF) 27%,

[0044] Acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer (AA / AMPS) 6%,

[0045] Polyepoxysuccinic Acid (PESA) 20%,

[0046] Zinc salt (ZnSO 4 ·7H 2 O) 8%,

[0047] Benzotriazole (BTA) 1.0%,

[0048] The rest is water.

[0049] Add water, sodium naphthalenesulfonate formaldehyde condensate, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, polyepoxysuccinic acid, zinc salt and azole compounds into the container in sequence. After stirring for 1.5 hours, the phosphorus-free re-corrosion and scale inhibitor was obtained.

[0050] The above formula 3 of a phosphorus-free corrosion and scale inhibitor was applied to the surface water II in Tengzhou, Shandong Province in Table 1, and the corrosion and scale inhibition experiments were carried out.

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Abstract

The invention discloses a non-phosphorus composite corrosion and scale inhibitor suitable for industrial circulating cooling water. The corrosion and scale inhibitor comprises 25-45% of naphthalenesulfonic acid-formaldehyde condensate (SNF), 5-15% of acrylic acid-2-acrylamido-2-methylpropane sulfonic acid copolymer (AA / AMPS), 10-20% of polyepoxysuccinic acid (PESA), 8-30% of zinc salt, 0.5-2% of azole compound and the balance of water by weight percent. By using the non-phosphorus composite corrosion and scale inhibitor, the circulating cooling water does not have phosphorus or nitrogen and is discharged without consideration of environmental problems. The non-phosphorus composite corrosion and scale inhibitor is efficient and environment-friendly.

Description

technical field [0001] The invention relates to the treatment of industrial circulating cooling water, and is especially suitable for carbon steel and various metal materials, in particular to a phosphorus-free composite corrosion and scale inhibitor. Background technique [0002] Phosphorus-free corrosion and scale inhibitors avoid the eutrophication of environmental waters to a certain extent because they do not discharge phosphorus, and promote the excessive reproduction of bacteria and algae, thereby preventing water pollution caused by red tides and other hazards. Phosphorus-free corrosion and scale inhibitors do not contain phosphorus, which reduces the reproduction of microorganisms in the circulating water system, reduces the amount of bactericidal algicides and slime strippers, and reduces the cost of sewage treatment. Therefore, the development of new phosphorus-free corrosion and scale inhibitors has become the development direction of the water treatment industry...

Claims

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Application Information

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IPC IPC(8): C02F5/12
Inventor 夏明珠司维蒙雷武王风云
Owner NANJING UNIV OF SCI & TECH
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