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Molybdenum phosphine system composite anti-erosion anti-sludging agent and preparation method thereof

Corrosion and scale inhibitor technology, scale inhibitor technology, applied in chemical instruments and methods, scale removal and water softening, compositions for inhibiting chemical changes, etc., can solve problems such as corrosion inhibition performance decline

Active Publication Date: 2007-07-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite corrosion and scale inhibitor solves the problem that the oxidation and decomposition of organic phosphine lead to the decline of corrosion inhibition performance

Method used

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  • Molybdenum phosphine system composite anti-erosion anti-sludging agent and preparation method thereof
  • Molybdenum phosphine system composite anti-erosion anti-sludging agent and preparation method thereof
  • Molybdenum phosphine system composite anti-erosion anti-sludging agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In a 200ml beaker filled with 45g deionized water, add 40g HEDP, 5g H 2 o 2 (Oxidizing agent), after stirring well, add 10g Na 2 MoO 4 2H 2 O, mix well to obtain the molybdenum-phosphine composite corrosion and scale inhibitor of the present invention. The prepared molybdenum-phosphine composite corrosion and scale inhibitor was transferred to a 150ml ground-mouth Erlenmeyer flask and stored at room temperature until use.

[0032] Take 10g Na 2 MoO 4 2H 2 O in a 200ml beaker, add 45g deionized water, stir to dissolve, then add 5g H 2 o 2 (Oxidizing agent), 40g HEDP, after mixing, obtain the molybdenum-phosphine composite corrosion and scale inhibitor of the present invention. The prepared molybdenum-phosphine composite corrosion and scale inhibitor was transferred to a 150ml ground-mouth Erlenmeyer flask and stored at room temperature until use.

Embodiment 2

[0034] Take 5g of ammonium molybdate in a 200ml beaker, add 40g of deionized water, 10g of binary copolymer of acrylic acid and 2-acrylamido-2-methyl-propanesulfonic acid, 6g of anhydrous zinc chloride, and stir to dissolve , add 3g perchloric acid (oxidizing agent), then add 2g phosphoric acid, 5gHPAA, 4g PBTC in the beaker, make up to 100g with deionized water. After mixing, the molybdenum-phosphine composite corrosion and scale inhibitor of the present invention is obtained. The prepared molybdenum-phosphine composite corrosion and scale inhibitor was transferred to a 150ml ground-mouth Erlenmeyer flask and stored at room temperature until use.

Embodiment 3

[0036] The operation of Example 2 was repeated except that 8 g of perchloric acid (oxidizing agent) was added. The prepared molybdenum-phosphine composite corrosion and scale inhibitor was transferred to a 150ml ground-mouth Erlenmeyer flask and stored at room temperature until use.

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Abstract

The invention provides a molybdate-phosphonate compound corrosion inhibitior and the method for preparing the same. Said corrosion inhibitior comprises of solidum molybdate 1-20 wt%, organic phosphine 1-40 wt%, oxidant 1-10 wt% and excipient 97wt%. The compound corrosion inhibitior is characterized by convenient operation and management and satable corrosion inhibition performance.

Description

technical field [0001] The invention relates to a composite corrosion and scale inhibitor and a preparation method thereof. Specifically, the present invention relates to a molybdenum-phosphine-based composite corrosion and scale inhibitor and a preparation method thereof. The molybdenum-phosphine-based composite corrosion and scale inhibitor has the characteristics of stable corrosion inhibition performance. Background technique [0002] Environmental protection has been paid more and more attention by people. The scope of use of many high-efficiency corrosion inhibitors such as chromate and nitrite has been more and more restricted. People have turned their research direction to some low-toxic or non-toxic corrosion inhibitors. Compounds, molybdate is one of them. [0003] Molybdate is a low-toxicity, pollution-free and high-efficiency corrosion inhibitor, which has the characteristics of inhibiting pitting corrosion, does not cause microbial reproduction, and is suitable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F15/00C23F11/00C02F5/10C09K15/00
Inventor 余正齐罗咏涛李本高
Owner CHINA PETROLEUM & CHEM CORP
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