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Method for removing metal from hydrocarbon oil using copolymers or its salts containing acrylic acid and sulfonic acid

A technology of copolymer and acrylic acid, which is applied in the direction of refined hydrocarbon oil, petroleum industry, etc., can solve the problem of large dosage, and achieve the effect of small dosage and high removal efficiency

Inactive Publication Date: 2004-08-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since polyphosphoric acid or its salts are chemically easy to hydrolyze to produce orthophosphoric acid or its salts, and the dosage is relatively large, calcium cannot be effectively removed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The raw material oil used in the experiment came from a petrochemical refinery in Northwest China, which was the vacuum residue after mixing the Xinjiang North Xinjiang crude oil and the South Xinjiang crude oil at a ratio of 7:3. Dilute the residual oil with kerosene in the laboratory, the ratio of residual oil to kerosene is 4:1, the calcium content of the raw oil after dilution is 85.3ppm, and the iron content is 9.9ppm. Prepare raw material oil and preheat to 90-100°C. AA / AMPS copolymer (molecular weight 1000-20000, containing about 20-50% of AMPS, provided by Beijing Linhua Water Quality Stabilizer Factory), water injection, and demulsifier are formulated into an aqueous solution according to a certain agent / calcium mass ratio and a water injection rate of 10%. The demulsifier is NS-9906, and the dosage is 50ppm. Fully mix the prepared aqueous solution and preheated raw material oil in a stirrer, then pour it into a conical glass desalination tank, and use a DP-II...

Embodiment 2

[0022] In this embodiment, AA / AMPS copolymer (molecular weight 1000-20000, AMPS 20-50%, provided by Beijing Linhua Water Quality Stabilizer Factory) is used to remove calcium and iron in the heavy oil in the ninth district of Karamay. The crude oil used in the experiment is heavy oil from the ninth district of Karamay, Xinjiang and its mixed oil with kerosene at a ratio of 7:3. The experimental demulsifier is FC9301, and the experimental procedure is the same as in Example 1. The results are shown in Table 2 below.

Embodiment 3

[0024] This example uses a terpolymer containing acrylic acid and AMPS for demetallation.

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Abstract

The process of eliminating metal from hydrocarbon oil with the copolymer containing acrylic acid and 2-acrylamide-2-methyl propyl sulfonic acid includes mixing the copolymer containing acrylic acid and 2-acrylamide-2-methyl propyl sulfonic acid or its salt with water injecting demulsifier at 30-200 deg.c to make metal in hydrocarbon oil generate water soluble compound dissolved in water, and oil-water separation to eliminate metal from hydrocarbon oil. The process has the features of less copolymer consumption and high elimination efficiency, and may be used for hydrocarbon oil in excessive calcium content.

Description

technical field [0001] The invention relates to a method for removing metals in hydrocarbon oil by using a copolymer containing acrylic acid and 2-acrylamide-2-methylpropylsulfonic acid or its salt. 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, Mg, and Fe, has greatly increased, and their influence on crude oil processing has been paid more and more attention by people. 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 resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G29/22
Inventor 徐振洪谭丽于丽李本高
Owner CHINA PETROLEUM & CHEM CORP
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