Petroleum natural gas pipeline corrosion inhibitor prepared by waste grease and method thereof

Abstract

The invention relates to a petroleum and natural gas pipe corrosion inhibitor prepared by use of waste greases and a method for preparing the petroleum and natural gas pipe corrosion inhibitor. Main raw materials of the petroleum and natural gas pipe corrosion inhibitor come from recycling of the waste greases. The preparation method comprises the following steps that: the waste greases are purified and classified; the greases are degraded through immobilized lipases so as to generate fatty acids; the fatty acids generate animation reaction with cyclohexylamines and ethoxyl ethylene diamines; the petroleum and natural gas pipe corrosion inhibitor is prepared by adoption of the purified greases as carriers and addition by mass percent of 0.5 to 1.5 percent of animation reaction products, 0.1 to 0.3 percent of pyridine oxalates, 0.1 to 0.3 percent of cyclohexylamines, 0.05 to 0.15 percent of AMP96, 0.3 to 0.8 percent of silane coupling agents, 0.05 to 0.15 percent of defoaming stabilizers and 0.3 to 0.8 percent of mildew inhibitors. The corrosion inhibitor has good multiphase inhibition performance on petroleum and natural gas metal pipes and realizes recycling of the waste greases by adoption of the latest environment-friendly and energy conservation technology.

Description

technical field [0001] The invention relates to a corrosion inhibitor suitable for oil and gas pipelines, in particular to an oil and gas metal pipeline corrosion inhibitor prepared by recycling waste edible oils and fats and a method thereof. Background technique [0002] After oil and gas are collected in oil and gas fields, they are usually purified by dehydration and desulfurization. However, in the process of oil and gas storage and transportation, the environment and working conditions are very different. 2 S, CO 2 And water, it is easy to cause serious corrosion loss and lead to major accidents. The oil and gas pipelines built in my country in the 1970s and 1980s are tens of thousands of kilometers long, and most of them are carbon steel pipelines. Due to long-term operation, the corrosion of pipelines is quite serious. Adding corrosion inhibitors to pipelines is still the most effective anti-corrosion method at present. And technology. [0003] At present, there ar...

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Problems solved by technology

[0006] Since waste oil contains a lot of water, free fatty acids, polymers and decomposition products, etc., and has a deep color and odor, it cannot be directly used as a raw material for preparing biodiesel or industrial oil

At present, although many waste oils are directly used to synthesize biodiesel, due to the influence of the instability of the source of raw materials, the cost of the treatment process is high and the stability of the product is poor.

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