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Application method of chemical industry by-products including organic acid

An application method and by-product technology, applied in the direction of refining with an acid-containing liquid, etc., can solve the problems of difficult separation of mixed dibasic acids, no separation method, etc., and achieve the effects of saving resources, low cost, and easy industrialization.

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

[0007] The separation of mixed dibasic acids is very difficult, and there is no effective separation method in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The by-products of adipic acid produced by a chemical factory (including 50.5% adipic acid, 39.0% glutaric acid, 7.3% succinic anhydride, and 3.2% ketones and amides) were used as decalcifying agents for decalcification. The raw oil used in the experiment was taken from Lanzhou Petrochemical Refinery, which is a mixed oil (calcium content: 45ppm) of Xinjiang North Xinjiang Crude Oil and South Xinjiang Crude Oil. Add the demulsifier NS-9906 and decalcifier to the injection water according to a certain agent / calcium ratio, the amount of the demulsifier added is 50ppm, and the water injection rate is 10%; the crude oil preheated to 60°C is mixed with water for 10 seconds in the mixer to make The oil and water are fully mixed, and the oil-water mixture is poured into a conical glass tank, and the conical tank is put into a DP-II electric desalter, the electric field gradient of the desalter is 200v / cm, the temperature is 80°C, and the time is 1 hour. After the oil-water sep...

Embodiment 2

[0021] The by-products of adipic acid produced by a chemical factory (including 50.5% adipic acid, 39.0% glutaric acid, 7.3% succinic anhydride, and 3.2% ketones and amides) were used as decalcifying agents for decalcification. In this example, the oil used in the experiment is heavy oil from the ninth district of Karamay, Xinjiang, with a calcium content of 240 ppm, an addition of 50 ppm of demulsifier FC9301, and a water injection rate of 10%. The crude oil preheating temperature is 90°C, and the temperature in the electric desalter is 90°C. The experimental method is the same as in Example 1. Table 2 is the experimental results.

[0022] crude oil type

Embodiment 3

[0024] The by-product of industrial production of caprolactam in a chemical plant (containing 45% of monobasic acid, 25% of dibasic acid and 30% of other organic matter) is used as a metal removal agent for decalcification. Oil, demulsifier FC9301, adding amount 50ppm, water injection rate 10%. The crude oil preheating temperature is 100-110°C, and the temperature in the electric desalter is 90°C. The experimental method is the same as in Example 1. Table 3 is the experimental results.

[0025] agent / calcium molar ratio

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PUM

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Abstract

The application process of chemical side product containing organic acid includes well mixing hydrocarbon oil with chemical side product containing organic acid and water injecting demulsifier to make metal in hydrocarbon oil produce water soluble compound dissolved in water; and oil-water separating to eliminate metal from hydrocarbon oil. Meanwhile, the amount of the side product is 0.5-10 times total calcium molar number in hydrocarbon oil, the amount of water is 3-50 % of hydrocarbon oil volume, the oil-water mixing time is 0.5 sec to 10 min and the mixing temperature is 30-150 deg.c. The process of applying chemical side product directly in demetalizing hydrocarbon oil has low cost, simple operation and easy industrial application, can improve the quality of hydrocarbon oil obviously.

Description

technical field [0001] The invention relates to an application method of chemical by-products containing organic acids. technical background [0002] In the industrial production methods of caprolactam, most of them use benzene as raw material, and prepare through the processes of benzene hydrogenation, cyclohexane oxidation, cyclohexanone oximation, and cyclohexanone oxime rearrangement. In addition to cyclohexanone and cyclohexanol, the oxidation products of cyclohexane also contain a considerable amount of organic acids and organic acid esters. In order to remove organic acids and organic acid esters in the oxidizing solution, sodium hydroxide solution is usually added to neutralize the saponification, so that the system changes from acidic to alkaline. Under alkaline conditions, oil-water two-phase separation: a large amount of unreacted cyclohexane and cyclohexanone and cyclohexanol produced by the reaction are separated from the water phase and recovered; acidic by-pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/00A62D3/30C10G17/02
Inventor 徐振洪于丽谭丽李本高
Owner CHINA PETROLEUM & CHEM CORP
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