Denitrifying agent for directly removing basic nitrogen compound from shale oil

A shale oil and basic nitrogen technology, applied in the petroleum industry, refined hydrocarbon oil, etc., can solve problems such as troublesome operation, easy swelling, limited exchange capacity, etc., and achieve simple removal process, obvious removal effect, and high sedimentation speed fast effect

Inactive Publication Date: 2011-02-09
DAQING OILFIELD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since most of the resins used are styrene type, this kind of resin is easy to swell when soaked in oil for a long time, thus affecting the r

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1 with 2.0g CuSO 4 ·5H 2 Dissolve O with 3.4g of water, add 94g of phosphoric acid (85%), mix well and then add 0.5g of demulsifier three-dimensional network maleic acid / olefin copolymer to compound into denitrification agent. Take Daqing shale oil as raw material, the ratio of solvent to oil is 1:100, stir at 65°C for 10 minutes, keep at 65°C and settle for 180 minutes, separate the nitrogen residue settled at the bottom of the flask from the upper shale oil, After refining, the alkali nitrogen content of shale oil drops to 1776ppm, and the alkali nitrogen removal rate is 53.0%. The acidity of shale oil before refining is 77.8mgKOH / 100mL, and the acidity of shale oil after refining is 87.9mgKOH / 100mL.

Embodiment 2

[0016] Example 2 (Comparative Example) The feed ratio and reaction conditions are the same as in Example 1, except that no demulsifier is added. After the same experimental operation as in Example 1, it is found by analysis that the acidity of the refined shale oil is 166.2 mgKOH / 100mL, compared with the acidity of shale oil before refining, the acidity of refined shale oil increased a lot without adding demulsifier, indicating that the residual denitrification agent did not settle down completely in shale oil, and the denitrification agent in the page Emulsified in rock oil, poor settling effect.

Embodiment 3

[0017] Embodiment 3 will 2.0g CuSO 4 ·5H 2 Dissolve O with 3.4g of water, add 94g of phosphoric acid (85%), mix well and then add 0.5g of demulsifier three-dimensional network maleic acid / olefin copolymer to compound into denitrification agent. Take Daqing shale oil as raw material, the ratio of solvent to oil is 1:50, stir at 65°C for 10 minutes, keep at 65°C and settle for 180 minutes, separate the nitrogen residue settled at the bottom of the flask from the upper shale oil, After refining, the alkali nitrogen content of shale oil drops to 506ppm, and the alkali nitrogen removal rate is 86.6%.

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Abstract

The invention relates to a denitrifying agent for directly removing a basic nitrogen compound from shale oil. The denitrifying agent comprises the following components in percentage by weight: 40 to 80 percent of B, 0.5 to 10 percent of L, 0.1 to 0.5 percent of S and the balance of water, wherein B is phosphoric acid; L is Lewis acid; and S is a water-soluble demulsifier. The B in the formula can provide H+ which is complexed into salt with a lone electron pair of the basic nitrogen compound so as to remove the basic nitrogen compound from oil; L can accept the lone electron pair of the basic nitrogen compound to be complexed into salt, and the synergistic effect of B and L has high capacity of removing basic nitrogen; and S has good demulsifying effect and can improve the uniformly mixing degree of the water-soluble B and L agents with oil in the oil stirring process. Therefore, the nitrogen removal efficiency of a primary agent is improved.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to the removal of basic nitrogen compounds in shale oil. Background technique [0002] The oil shale reserves in the world are very large, if converted into shale oil reserves, it far exceeds the total reserves of natural oil. With the depletion of natural oil, the shale oil industry will receive more and more attention. In the oil refining industry, the catalytic cracking unit is one of the most profitable units in the refinery. Due to the development of secondary processing methods in the petroleum industry and the increase in demand for various light oil products, there is a shortage of raw materials for catalytic cracking. Shale oil can expand the source of raw materials for catalytic cracking. Shale oil contains a lot of polar compounds. The existence of these polar compounds brings a lot of inconvenience to the processing of shale pumping. For example, nitrogen-...

Claims

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Application Information

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IPC IPC(8): C10G29/00
Inventor 刘振文姜恒王波廖克俭徐明李晓军刘建国
Owner DAQING OILFIELD CO LTD
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