SU407938A1 - METHOD OF DESTRUCTION OF OIL EMULSIONS - Google Patents

Description

one

The invention relates to methods for the destruction of petroleum emulsions and can be used in the dehydration and desalting of petroleum.

There is a known method of destroying petroleum emulsions by introducing a demulsifier, ethoxylated l-cumylphenol, liberated, for example, from a phenolic resin, with an emulsion, followed by emulsifying it using any of the known methods. However, the consumption of the demulsifier is large, and consequently, ethylene oxide and its preparation.

In order to reduce the consumption of the demulsifier, it is proposed to use hydroxymethyl alcohol derivatives of hydroxyethylated cumylphenols, preferably hydroxymethyl derivatives of polyoxyethylene phenolic resin, containing her cumylphenols.

The demulsifier can be obtained by the reaction of the reaction of ethoxylated cumylphenol (OKF-l) or ethoxylated phenol resin (OFS-l) with formaldehyde in the presence of w

) OiCil-i U Q} nfi + CK- Q - SI,

0 (СНс, СШо1пСНоОН

where n is the number of attached moles of ethylene oxide.

As a phenolic resin, waste from the production of phenol and acetone through isopronylbenzene hydroperoxide is used.

Reagents based on ethoxylated cumylphepol are given the code number OKF-g-F, where OKF means the ethoxylated cumylphenol;

n is the number of attached moles of ethylene oxide (/ g 5-11); F - condensation product with formaldehyde. Reagents based on hydroxyethyl phenol) The 1st resin is given the code number OFS-M-F (L 5-13).

Example. The reagents obtained are tested for demulsifying ability on the natural oil emulsion of the Bavlinsky field according to the general procedure. In a sump Lysenko PA 0.5 l pour 300 ml of oil

emulsion taken from the oilfield park, and the required amount of a 1% aqueous reagent solution is added to the emulsion. The emulsion is mixed with the reagent manually for 5 minutes, after which it is placed in

water thermostat at 50 ° С for 3 hours. Through

Every 0.5 hour, the amount of sludge water is measured and the amount of residual water in oil is determined according to GOST 2477-65.

To compare the efficacy of hydroxymethyl derivatives of ethoxylated cumylphenols and oxyethylated phenolic resin, the synthesized OKP-L-F and OFS-p-F reagents are tested in parallel with the OKF-g and OFS-p reagents obtained by a known method. The test results are shown in the table.

As can be seen, from the table, oximethyl derivatives of ethoxylated cumylphenols and oxyethylated phenolic resin have a significantly better demulsifying ability with an equal length of polyglycol chain. The introduction of the hydroxymethyl group into the reagent molecule by demulsifying ability is equivalent to the introduction of a glycol chain containing 3-4 mol of ethylene oxide. Consequently, this method can significantly improve the demulsifying ability of the reagent with the same consumption of ethylene oxide or reduce the consumption of ethylene oxide, without altering the deemz of the loosening ability.

Subject invention

Claims (2)

1. A method of destroying petroleum emulsions by introducing a demulsifier based on ethoxylated cumylphenols, followed by settling, characterized in that, in order to reduce the consumption of the demulsifier, oxymethyl derivatives of ethoxylated cumylphenols are used as the latter. 2. A method according to claim 1, characterized in that oxymethylol derivatives of ethoxyethylene phenol resin containing cumylphenols are preferably used as a demulsifier.