Water-soluble crude oil desulfurizing agent and preparation method thereof
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A desulfurizer, water-soluble technology, applied in the field of water-soluble crude oil desulfurizer and its preparation, can solve the problems of poor desulfurization effect and low sulfur capacity, and achieve the effect of excellent instantaneous desulfurization performance
Inactive Publication Date: 2015-01-07
E TECH ENERGY TECH DEV CORP
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Problems solved by technology
Although these desulfurizers can reduce the concentration of hydrogen sulfide to 10mg / m in a short time 3 , up to the relevant standards, but there is a defect of low sulfur capacity
For the production process of crude oil with high hydrogen sulfide content, there are technical problems such as poor desulfurization effect
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Embodiment 1
[0022] A water-soluble crude oil desulfurizer, using water as solvent, solute: formaldehyde, mass fraction 10%; methyldiethanolamine (MDEA), mass concentration 7%; diethanolamine (DEA), mass concentration 32.8%; sodium nitrite , The mass concentration is 6%.
Embodiment 2
[0024] A water-soluble crude oil desulfurizer, using water as solvent, solute: formaldehyde, mass fraction 15%; methyldiethanolamine (MDEA), mass concentration 20%; diethanolamine (DEA), mass concentration 34%; sodium nitrite , The mass concentration is 7%.
Embodiment 3
[0026] A preparation method of a water-soluble crude oil desulfurizer, the preparation process includes the following steps:
[0027] Step 1: Take 60g of sodium nitrite and dissolve it in 1000ml of water to prepare a sodium nitrite solution;
[0028] Step 2: Drop 8ml of diethanolamine into 200ml of methyldiethanolamine, and place it in a refrigerator at 4°C for 48 hours after the titration;
[0029] Step 3: Prepare 30ml of 20% formaldehyde solution in the dark and save it for later use, and then add it to the cooled mixed solution;
[0030] Step 4: Place the methyldiethanolamine, formaldehyde solution and diethanolamine solution in a shaker, shake for 70min and take it out.
[0031] Add the corresponding amount of sodium nitrite solution prepared in step 1 according to the mass concentration of sodium nitrite in the final desulfurizer, and adjust the concentration with distilled water during the process;
[0032] Step 5: The mixed solution after standing for 24 hours is the prepared desu...
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Abstract
The invention relates to a water-soluble crude oil desulfurizing agent and a preparation method thereof, and belongs to the technical field of crude oil desulphurization for offshore oilfields. The water-soluble crude oil desulfurizing agent takes water as a solvent, and the solute of the water-soluble crude oil desulfurizing agent comprises the following components in percentage by weight: 10%-15% of methanal, 6%-22% of methyl diethanolamine, 32%-34% of diethanolamine, and 5%-7% of sodium nitrite. The preparation method for the water-soluble crude oil desulfurizing agent comprises the following steps: (1) compounding a sodium nitrite solution according to the proportion of 60g-90g of sodium nitrite and 1000ml of water at the temperature of 25-60 DEG C; (2) dripping the diethanolamine into the methyl diethanolamine according to the proportion of 8ml-24ml of diethanolamine and 200ml of the methyl diethanolamine, and cooling the diethanolamine and the methyl diethanolamine for 48-72 hours at the temperature of 2-6 DEG C; (3) adding a methanal solution into the cooled mixed solution according to the proportion of 30ml of methanal of which the weight percentage is 20%-30%; (4) placing the solution which is compounded in the steps on a shaking table, and shaking the solution for 60-80 minutes; (5) standing the solution which is shaken in the step (4) for 24 hours to obtain the desulfurizing agent. The desulfurizing agent and the preparation method disclosed by the invention have the advantages that the technology is simple, raw materials are easy to obtain, the sulfur capacity is high, instantaneous desulphurization is realized, and the broad-spectrum performance is strong.
Description
Technical field [0001] The invention belongs to the technical field of crude oil desulfurization in offshore oil fields, and particularly relates to a water-soluble crude oil desulfurizer and a preparation method thereof. Background technique [0002] Currently, H 2 As a highly toxic gas, S is a serious hazard to the human body. For the petroleum industry, H 2 The distribution of S gas is very extensive, and there are potential safety hazards such as life injury to workers. It corrodes the official website of oil transportation and downstream refining and chemical equipment, and pollutes the surrounding environment to a certain extent. At the same time, it brings certain safety risks to oilfield employees and residents. Related experimental studies have shown that most of the hydrogen sulfide in oil wells and gathering systems is derived from the metabolism of sulfate-reducing bacteria. At present, the main oil field desulfurizers include dry desulfurization and wet desulfuriza...
Claims
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