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Preparation method and application of a phosphorus-free corrosion and scale inhibitor in high altitude areas

A corrosion and scale inhibitor, phosphorus-free corrosion inhibition technology, applied in the preparation of sulfonic acid, chemical instruments and methods, descaling and water softening, etc. problems such as low rate, to achieve the effect of good compatibility, good application prospects and excellent performance

Inactive Publication Date: 2017-09-19
荣星光
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high-altitude areas have their special regional characteristics, the local air is thin and the oxygen content is low; and the temperature difference between day and night is large, so it constitutes a serious adverse effect on the production of fine chemicals
When the applicant tried to produce modified polyepoxysuccinic acid according to the prior art method, not only the yield of the obtained product was low, but also its quality did not meet expectations at all, indicating that the prior art method is not suitable for the special environment in high altitude areas
In addition, the prior art methods are only a small amount of preparation in the laboratory, and are not suitable for industrial production in high altitude areas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Dissolve 120 kg of maleic anhydride or maleic anhydride in 350 kg of deionized water, slowly add 40% sodium hydroxide solution to adjust the pH value to 9, add 3.5 kg of 2-acrylamide-2-methylpropanesulfonic acid, and stir to dissolve , add 4kg heteropoly acid as catalyst, then add 160kg30% hydrogen peroxide, slowly add 40% sodium hydroxide solution under constant stirring to keep pH=5-6, react at 60-65 degrees Celsius for 2 hours, and obtain solution of succinate,

[0049] After the aforementioned solution containing epoxy succinate is cooled to room temperature, add 8 kg of urethanesulfonic acid and 4 kg of 2-acrylamide-2-methylpropanesulfonic acid to it, mix well, add alkaline substances to make the pH 10.5, and then add 3kg initiator (consisting of 2.3kg sodium methylate and 0.7kg calcium hydroxide powder), the temperature is raised to 78-80 degrees Celsius for polymerization, after 3 hours, cooled to room temperature, filtered to obtain light yellow viscous liquid, ...

Embodiment 2

[0052] Dissolve 140 kg of maleic anhydride or maleic anhydride in 400 kg of deionized water, slowly add 40% sodium hydroxide solution to adjust the pH to 9.5, add 2.8 kg of 2-acrylamide-2-methylpropanesulfonic acid, and stir to dissolve Finally, add 6kg heteropolyacid as catalyst, then add 200kg30% hydrogen peroxide, slowly add 40% sodium hydroxide solution under constant stirring to keep pH=5.5-6.5, react at 65~68 degrees Celsius for 3 hours, obtain the A solution of oxysuccinate,

[0053] After the aforementioned solution containing epoxy succinate was cooled to room temperature, 8.5kg of urethanesulfonic acid and 7kg of 2-acrylamide-2-methylpropanesulfonic acid were added thereto, mixed evenly, and an alkaline substance was added to make the pH to 11, and then Add 5.5kg initiator (consisting of 4.2kg sodium methoxide and 1.3kg calcium hydroxide powder), heat up to 75-78 degrees Celsius to carry out polymerization reaction, after 4 hours, cool to room temperature, filter to ...

Embodiment 3

[0056] Dissolve 110 kg of maleic anhydride or maleic anhydride in 310 kg of deionized water, slowly add 35% sodium hydroxide solution to adjust the pH value to 10, add 3.2 kg of 2-acrylamide-2-methylpropanesulfonic acid, and stir to dissolve Finally, add 2.5kg heteropolyacid as catalyst, add 135kg30% hydrogen peroxide again, slowly add 35% sodium hydroxide solution under constant stirring and keep pH=6.5-7, react at 62~66 degrees Celsius for 3.5 hours, obtain containing solution of epoxy succinate,

[0057] After the aforementioned solution containing epoxy succinate was cooled to room temperature, 7kg of urethanesulfonic acid and 3.5kg of 2-acrylamide-2-methylpropanesulfonic acid were added thereto, mixed evenly, and an alkaline substance was added to make the pH 11.5, and then Add 4.2kg initiator (consisting of 3.6kg sodium ethylate and 0.6kg calcium hydroxide powder), heat up to 80-82 degrees Celsius to carry out polymerization reaction, after 4.5 hours, cool to room temper...

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PUM

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Abstract

The invention provides a method for preparing a phosphorus-free corrosion inhibitor in high-altitude areas. The method takes into account the special geographical environment of thin air and large temperature difference between day and night in high-altitude areas, and realizes polyepoxysuccinic acid or its salts by improving the catalyst. In the process of co-polymerizing with sulfonic acid amines, amino groups and sulfonic acid groups are introduced into the original single polyepoxysuccinic acid molecular structure, so that the resulting polymer structure contains amino groups, ether groups and carboxyl groups at the same time. The product can be used as a corrosion and scale inhibitor, and plays an important role in the field of water treatment, especially in oil fields.

Description

technical field [0001] The invention relates to a method for preparing a phosphorus-free corrosion inhibitor in high-altitude areas. Specifically, it is realized by improving the catalyst type, dosage and process flow in the special geographical environment of high-altitude areas where the air is thin and the temperature difference between day and night is large. The co-polymerization of epoxy succinic acid or its salts and sulfonic acid amines is used to obtain a modified polyepoxy succinic acid polymer with corrosion and scale inhibition effects in the field of water treatment. Background technique [0002] Polyepoxysuccinic acid (PESA) is a green and environmentally friendly water treatment agent developed in the 1990s. It is a green scale inhibitor with phosphorus-free, non-nitrogen and good biodegradability. It also has corrosion inhibition effects. The scale effect is obviously better than that of commonly used organic phosphonic acid scale inhibitors. Polyepoxysuccin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/30C08G65/26C02F5/10C07C309/15C07C303/22
Inventor 荣星光
Owner 荣星光