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Environment-friendly crude oil metal chelating agent and preparation method thereof

A metal chelating agent, environment-friendly technology, applied in the treatment of hydrocarbon oil, refined hydrocarbon oil, petroleum industry, etc., can solve the problems of poor removal of nickel and vanadium, high cost of microwave devices, not in line with environmental protection, etc. Grafting rate and free radical copolymerization efficiency, shortened copolymerization reaction time, low production cost effect

Active Publication Date: 2017-06-30
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carboxylic acid demetallizers have a good effect on the removal of calcium and iron, but are not effective on the removal of nickel and vanadium; although phosphorus-containing compounds have a good effect on the removal of nickel and vanadium, the wastewater discharged after production contains a large amount of phosphorus , resulting in eutrophication of the water body, which does not meet the requirements of environmental protection
[0003] Chinese patent CN101402878A uses sodium diethylaminodithioformate, etc. as removal agents, and adopts microwave chemical method to remove heavy metals from crude oil. The removal effect is better, but the cost of microwave devices is high; The division method uses phosphorus-containing compounds such as phosphoric acid, trimethyl phosphate and phosphite as the main chelating agent, which has a good removal effect on nickel and vanadium, but the removal agent contains phosphorus, which does not meet environmental protection requirements.

Method used

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  • Environment-friendly crude oil metal chelating agent and preparation method thereof
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Examples

Experimental program
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Effect test

Embodiment 1

[0020] Example 1: At room temperature, 10 g of carboxymethyl cellulose with a degree of substitution of 0.6, 150 g of deionized water, and 0.15 g of azobisisobutylamidine hydrochloride were added to the reaction kettle, and nitrogen gas was passed after dissolving evenly. ℃, under a nitrogen atmosphere, first carry out microwave irradiation for 5 minutes, and the power of the microwave is 100W. After microwave irradiation, add 0.5g mercaptoethanol and 6g propenylthiourea to the reaction kettle, mix well and add dropwise 100g mass fraction It is a 10wt.% aqueous solution of hydroxypropyl acrylate, which is dripped for 1 hour, and reacted with microwaves for 10 minutes after the dripping is completed, and the microwave power is 100W. Cool down to room temperature after the reaction to obtain a reddish-brown transparent environment-friendly crude oil metal chelating agent.

[0021] Taking Oman's Basrah mixed crude oil as the test oil, its nickel content is 16.7ppm, vanadium conte...

Embodiment 2

[0022] Example 2: At room temperature, 16 g of carboxymethyl cellulose with a degree of substitution of 0.6, 200 g of deionized water, and 3 g of azobisisobutylimidazoline hydrochloride were added to the reaction kettle, and nitrogen gas was passed after dissolving evenly. ℃, under a nitrogen atmosphere, first carry out microwave irradiation for 2 minutes, and the power of the microwave is 500W. After microwave irradiation, add 1.2g thioglycolic acid and 2g propenylthiourea to the reaction kettle, mix and add 160g mass fraction dropwise It is 20wt.% hydroxypropyl acrylate aqueous solution, after 2 hours of dripping, microwave reaction for 15 minutes after dripping, microwave power 800W. Cool down to room temperature after the reaction to obtain a reddish-brown transparent environment-friendly crude oil metal chelating agent.

[0023] Taking Oman Basrah blended crude oil as the test oil, its nickel content is 16.0ppm, vanadium content is 68.2ppm, and iron content is 10.2ppm. Wh...

Embodiment 3

[0024] Example 3: At room temperature, 5 g of carboxymethyl cellulose with a degree of substitution of 0.8, 100 g of deionized water, and 0.5 g of azobisisobutylimidazoline hydrochloride were added to the reaction kettle, and nitrogen gas was passed after the dissolution was uniform. 80°C, under a nitrogen atmosphere, first carry out microwave irradiation for 25 minutes, and the power of the microwave is 750W. After microwave irradiation, add 0.18g mercaptoethanol and 10g propylene thiourea to the reaction kettle, mix evenly and drop 250g mass The aqueous solution of hydroxybutyl acrylate with a fraction of 10wt.% was dripped for 3 hours, and reacted in microwave for 40 minutes after the dripping, and the microwave power was 400W. Cool down to room temperature after the reaction to obtain a reddish-brown transparent environment-friendly crude oil metal chelating agent.

[0025] Taking Oman Basra mixed crude oil as the test oil, its nickel content is 17.6ppm, vanadium content i...

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Abstract

The invention discloses an environment-friendly crude oil metal chelating agent and a preparation method thereof, and relates to preparation of the environment-friendly crude oil metal chelating agent. The crude oil metal chelating agent has a good removing effect on metals such as nickel, vanadium and iron in crude oil and is prepared by carrying out microwave assisted induced grafting of free radical and copolymerization on carboxymethyl cellulose, allyl thiourea and hydroxy acrylate monomer. A structural general formula of the environment-friendly crude oil metal chelating agent is shown in the description, wherein R is CH2CHOHCH3 or (CH2)4OH, a repeating unit number m is 100 to 2000, the polymerization degree x is 2 to 1000, and the polymerization degree y is 2 to 100. According to the crude oil metal chelating agent, by molecular design and structural control of a polymerization monomer and a copolymer, agglomeration and synergism of multiple functional groups such as amino group, carboxyl, ester group and hydroxyl are realized, and the functionality of the metal chelating agent is effectively improved; the chelating agent is an amphiphilic crude oil metal remover, the nickel removing rate of the crude oil reaches 45 percent or above, the vanadium removing rate reaches 35 percent or above, and the iron removing rate reaches 85 percent or above.

Description

technical field [0001] The invention relates to the preparation of a crude oil metal chelating agent, which is suitable for removing metals such as nickel, vanadium and iron in crude oil with high heavy metal content. Background technique [0002] In recent years, with the continuous increase of world oil consumption and the depletion of conventional oil resources, the proportion of unconventional heavy and low-quality crude oil exploration and use has been increasing. The content of heavy metals in unconventional crude oil is much higher than that of conventional crude oil. These heavy metals are mainly nickel, vanadium, and iron, which have a serious poisoning effect on the catalysts of crude oil catalytic cracking and catalytic hydrogenation processes. Nickel and vanadium in crude oil mainly exist in the structure of porphyrin compounds, and the thermal decomposition temperature is about 500°C, and the structure is stable; iron mainly exists in the form of naphthenate and...

Claims

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Application Information

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IPC IPC(8): C08F251/02C08F220/28C08F228/02C08F2/46C08F2/38C10G29/20
CPCC08F2/38C08F2/46C08F251/02C10G29/20C10G2300/1033C10G2300/202C08F220/281
Inventor 吴文婷梁爽李世伟蔡志岚杨海涌周钰明姚清照黄镜怡孙伟
Owner SOUTHEAST UNIV