Crude oil deemulsifying agent and its preparing method

A technology of demulsifier and chain extender, applied in the field of crude oil demulsifier and its preparation, can solve problems such as unpublished research on crude oil demulsifier, and achieve the effects of low cost, high molecular weight and reasonable branching degree

Active Publication Date: 2007-10-31
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that there are few reports on the special design and synthesis of multifunctional chain extenders with large molecular weight, and the corresponding studies on crude oil demulsifiers have not been published.

Method used

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  • Crude oil deemulsifying agent and its preparing method
  • Crude oil deemulsifying agent and its preparing method
  • Crude oil deemulsifying agent and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1. Preparation of a chain extender with a weight average molecular weight of 710.

[0028] Using xylene as a solvent, methyl methacrylate and hydroxyethyl methacrylate were put into a three-necked flask at a molar ratio of 1:0.08, mechanically stirred, and 1 / 2 of the total mass of methyl methacrylate and hydroxyethyl methacrylate was added. 0.5% of the initiator dibenzoyl peroxide and 2% of the chain transfer agent mercaptoethanol of the total mass of methyl methacrylate and hydroxyethyl methacrylate, reacted at 100 ° C for 2 hours to obtain methyl acrylate and formazan A copolymer of hydroxyethyl methacrylate; add phosphorus tribromide which is one-third of the mole number of hydroxyethyl methacrylate to the copolymer, stir mechanically, react at 105°C for 4 hours, and distill under reduced pressure at 90°C for 2 hours , That is, a random copolymer chain extender. Wherein: the molar ratio of the structural units of methyl methacrylate, hydroxyethyl methacrylat...

Embodiment 2

[0029] Example 2. Preparation of a chain extender with a weight average molecular weight of 2580.

[0030] Using xylene as a solvent, butyl acrylate and hydroxyethyl methacrylate were put into a three-necked flask at a molar ratio of 1:0.04, mechanically stirred, and an initiator of 0.07% of the total mass of butyl acrylate and hydroxyethyl methacrylate was added. Dibenzoyl peroxide, 9% chain transfer agent isopropanol based on the total mass of butyl acrylate and hydroxyethyl methacrylate, and react at 80°C for 6 hours to obtain butyl acrylate and hydroxyethyl methacrylate A copolymer; add phosphorus tribromide which is one-third of the mole number of hydroxyethyl methacrylate to the copolymer, stir mechanically, react at 95°C for 5 hours, and distill under reduced pressure at 90°C for 2 hours to obtain random Copolymer chain extender. Wherein: the molar ratio of the structural units of butyl acrylate, hydroxyethyl methacrylate and bromoethyl methacrylate is 0.82:0.014:0.02,...

Embodiment 3

[0031] Example 3. Preparation of a chain extender with a weight average molecular weight of 1090.

[0032]Using toluene as a solvent, methyl methacrylate and hydroxyethyl methacrylate were put into a three-necked flask at a molar ratio of 1:0.12, mechanically stirred, and 0.42% of the total mass of methyl methacrylate and hydroxyethyl methacrylate was added. % initiator dibenzoyl peroxide and methyl methacrylate and 4% chain transfer agent mercaptoethanol of the total mass of hydroxyethyl methacrylate, reacted for 3 hours at 95°C to obtain methyl methacrylate and A copolymer of hydroxyethyl methacrylate; add phosphorus tribromide which is one-third of the molar number of hydroxyethyl methacrylate to the copolymer, stir mechanically, react at 90°C for 8 hours, and distill under reduced pressure at 90°C for 2 hours, the random copolymer chain extender is obtained. Wherein: the molar ratio of structural units of methyl methacrylate, hydroxyethyl methacrylate and bromoethyl metha...

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Abstract

The invention discloses an emulsion breaker and the method to manufacture. It would be gained following the steps: using toluene or xylene as solvent, adding incept agent polyethylene-polyamine or nonyl phenol-formaldehyde resin, mixing ethylene oxide that the degree of polymerization is 23-30 and epoxy shank-alkyl that the degree of polymerization is 15-38 according to weight ratio 1:1-3, using NaOH or KOH as activator reacting for 1.5-4 hours under the condition of 100-140 degree centigrade and 0.2-0.5MPa to gain polyether; mixing polyether with extend agent according to mol ratio 1:0.06-0.15, adding pyridine that has the same mol quantity as extend agent and reacting for 1-3 hours under 90-100 degree centigrade; then, gaining base oil emulsion breaker after vacuuming and pressure relieving. It has simple technology, low usage, good emulsion breaking effect and low cost.

Description

technical field [0001] The invention relates to a crude oil demulsifier and a preparation method thereof. Background technique [0002] After the crude oil is extracted from the oil well, it must first be dehydrated in a joint station or a treatment plant to make the water content reach the standard before it can be exported to the refinery for refining and processing. At present, most oilfields in China have entered a period of medium-high water cut. In order to increase oil production and reduce water content, and achieve increased and stable crude oil production, polymer flooding technology has become one of the leading technologies for chemical flooding to enhance oil recovery, and has gained huge technological, economic and economic benefits. social benefits. At the same time, the presence of polymers increases the difficulty of demulsification and dehydration of crude oil, especially for heavy oil with high colloidal asphaltenes content. Hydrophobic associative polyme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/00
Inventor 张健韩明向问陶孙福街姜伟
Owner CHINA NAT OFFSHORE OIL CORP
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