Demetallization agent for hy drocarbon oil and its operation method

A demetallization agent and hydrocarbon oil technology, applied in the field of metals, can solve the problems of low removal efficiency, high cost, unfavorable industrialization, etc.

Inactive Publication Date: 2003-07-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned decalcification technology has a certain effect on the removal of calcium in crude oil, but the removal efficiency is not high, especially for crude oil with high calcium content, such as large amount of demetalliza...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The compound demetallization agent prepared in the laboratory consists of A: 10% formic acid, 10% acetic acid, 25% propionic acid; B: 40% maleic acid; C: 0.1% polyacrylamide; D: 1% 2-mercaptobenzo Thiazole; the remainder is deionized water.

[0022] The crude oil used in the experiment is heavy oil from the ninth district of Karamay, containing 240ppm calcium. The demulsifier FC9301 and demetallizer are made into an aqueous solution, the amount of demulsifier added is 50ppm, and the water injection rate is 10%. Then stir and mix with crude oil in the mixer to fully contact the oil and water, pour the oil-water mixture into the conical glass tank, put the conical tank into the DP-II electric desalter, the electric field gradient of the desalter is 200v / cm, and the temperature is 80°C. Time 1 hour. After the oil and water are separated, take the de-oiled oil sample and use the plasma emission spectrometer to measure the calcium content. Table 1 is the experimental resu...

Embodiment 2

[0025] The compound demetallization agent prepared in the laboratory is composed of A: 30% formic acid, 30% acetic acid, 10% butyric acid; B: 20% maleic acid; C: 0.2% polyacrylamide; D: 0.5% HPAA; ionized water.

[0026] The oil used in the experiment is the mixed oil (82.8ppm calcium) mixed with Beijiang crude oil (calcium content: 112.3ppm) and southern Xinjiang crude oil (calcium content 14ppm) at a ratio of 7:3. The experimental method is the same as in Example 1. The demulsifier is NS-9906, and the dosage is 50ppm. Table 2 is the experimental results.

[0027] Dose / Calcium Ratio

Embodiment 3

[0029] The compound demetallization agent prepared in the laboratory consists of A: 30% propionic acid, 30% formic acid, 20% acetic acid; B: 10% succinic acid; C: 0.1% polyacrylamide; D: 0.5% hydroxyethylene di Phosphonic acid; remainder is deionized water.

[0030] The oil used in the experiment is Beijiang crude oil (calcium-containing: 112.3ppm), and the experiment method is the same as in Example 2. The demulsifier is NS-9906, the dosage is 50ppm. The experimental results are shown in Table 3.

[0031] Dose / Calcium Ratio

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PUM

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Abstract

A demetalating agent for hydrocarbon oil contains one mor mixture of more than two of formic acid, acetic acid, propionic acid and butanoic acid, one or mixture of butanedioic acid and fumaric acid or maleic acid, polyacrylamide, one or mixture of more than two of S-carboxyethyl thiosuccinic acid, 2-mercaptobenzothiazole, hydroxyethylidene biphosphonic acid and 2-hydroxyphosphion acetic acid, andwater.

Description

technical field [0001] The invention relates to a method for removing metals such as calcium and magnesium from hydrocarbon oils such as crude oil, heavy hydrocarbon residue oil or solvent deasphalted oil. technical background [0002] In recent years, with the development of oil extraction technology, many heavy crude oils have been extracted. The content of metals in these crude oils, especially some alkaline earth metals such as Ca and Mg, has greatly increased, and people have paid more and more attention to their influence on crude oil processing. Studies have shown that the increase of Ca content in raw oil will significantly reduce the molecular sieve and matrix area of ​​the catalyst, which will directly affect the activity of the catalyst. In recent years, some refineries refining high-Ca crude oil have been poisoned and deactivated by catalytic cracking agents, which not only greatly reduces the yield of light oil, but also affects the quality of downstream residu...

Claims

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Application Information

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IPC IPC(8): C10G17/02C10G21/16
Inventor 徐振洪傅晓萍谭丽李本高吴晓东
Owner CHINA PETROLEUM & CHEM CORP
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