RU1360185C - Process for disintegrating stable oil emulsions - Google Patents

Process for disintegrating stable oil emulsions Download PDF

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RU1360185C
RU1360185C SU4037936A RU1360185C RU 1360185 C RU1360185 C RU 1360185C SU 4037936 A SU4037936 A SU 4037936A RU 1360185 C RU1360185 C RU 1360185C
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Russia
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emulsion
oil
demulsifier
petroleum
water
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Russian (ru)
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Р.Ф. Хамидуллин
И.Н. Дияров
Ф.Ф. Хамидуллин
А.А. Гречухина
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ТатНИПИнефть
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Abstract

FIELD: petrochemistry. SUBSTANCE: the oil emulsion is disintegrated by addition of a demulsifier and water followed by heating and agitation. The demulsifier is an oil-soluble demulsifier such as a block copolymer of ethylene and propylene oxides based on ethylene diamine in admixture with a reagent based on sulfonate and a light gasoline distillate used in an amount of 0.15-0.3 kg/t petroleum, 1.0-2.0 kg/t petroleum and 800-100 kg/t petroleum, respectively. The addition of fresh water renders the emulsion anhydrous to 80-90 wt %. The resultant emulsion is heated to a temperature by 5 - 15 grad. C higher than the emulsion starting temperature. The claimed process makes it possible to obtain petroleum having a low content of residual water and iron sulfide. This is an indication of a sufficient degree of disintegration of the initial emulsion. EFFECT: greater degree of disintegration. 1 tbl

Description

Изобретение относится к подготовке нефти на промыслах, в частности к способам разрушения стойких нефтяных эмульсий при обезвоживании и обессоливании нефти. The invention relates to the preparation of oil in the fields, in particular to methods for the destruction of persistent oil emulsions during dehydration and desalting of oil.

Целью изобретения является повышение глубины разрушения. The aim of the invention is to increase the depth of destruction.

П р и м е р. Пробы эмульсии отгибали из открытых нефтеловушек Павловского узла подготовки нефти. Эмульсия представляла собой высоковязкую (вязкость 1251 сП при 20оС) и высококонцентрированную смесь, содержащую 4072 мг/л сульфида железа, 47,4 мас.% воды, 54000 мг/л солей и большое количество других примесей в виде смол, парафинов, асфальтенов и механических частиц. Навеска каждой пробы составляла 200 мл. В пробу эмульсии вводили смесь маслорастворимого деэмульгатора типа блок-сополимера окисей этилена и пропилена на основе этилендиамина (сепароль 5084), реагента МЛ-72 на основе сульфоната и легкого бензинового дистиллята. Содержание компонентов в смеси выбирались из расчета на 1 т нефти, кг: сепароль 5084 0,15-0,3; реагент МЛ-72, 1,0-2,0; легкий бензиновый дистиллят 80-100. После введенных этих реагентов в эмульсию подавали пресную воду из расчета, чтобы суммарная обводненность полученной эмульсии составляла 80-90 мас.%. Затем все пробы нагревали до 80-90оС, т. е. на 5-15оС выше температуры начала кипения полученной эмульсии, которая составляет 75оС. После нагрева пробы подвергали интенсивному перемешиванию в течение 10-120 мин на специальной установке (мешалке). По истечении времени перемешивания пробы ставили на отстой, Время отстоя до 24 ч. Нефть и отделившуюся воду подвергали физико-химическому анализу. Вязкость обрабатываемой эмульсии после введения в нее раствора реагентов и пресной воды, нагрева и перемешивания с 1251 сП снизилась до 18 сП. По динамике отделения воды от нефти, остаточному содержанию в нефти воды и сульфида железа оценивали глубину разрушения стойких нефтяных эмульсий. Условия разрушения эмульсии, количество введенных реагентов и воды, а также полученные результаты приведены в таблице. Анализ полученных результатов, приведенный в таблице, показывает, что совокупность описанных примеров обработки стойкой нефтяной эмульсии позволяет с достаточной глубиной разрушить исходную эмульсию и получить нефть с низким содержанием остаточной воды и сульфида железа.PRI me R. Samples of the emulsion were bent from open oil traps of the Pavlovsky oil preparation unit. The emulsion was a highly viscous (viscosity 1251 centipoise at 20 ° C) and a highly concentrated mixture containing 4072 mg / l of iron sulfide, 47.4 wt.% Water, 54,000 mg / l of salts and a large quantity of other impurities in the form of resins, paraffins, asphaltenes and mechanical particles. A portion of each sample was 200 ml. A mixture of an oil-soluble demulsifier of the ethylene diamine-ethylene oxide copolymer block copolymer type (Separol 5084), a sulfonate-based ML-72 reagent and a light gasoline distillate was introduced into the emulsion sample. The content of components in the mixture was selected based on 1 ton of oil, kg: Separol 5084 0.15-0.3; reagent ML-72, 1.0-2.0; light gasoline distillate 80-100. After these reagents were introduced, fresh water was fed into the emulsion so that the total water content of the resulting emulsion was 80-90 wt.%. Then all samples were heated to 80-90 ° C, ie. E. 5-15 C above the initial boiling point of the resulting emulsion, which is 75 ° C. After heating, the sample was vigorously stirred for 10-120 min on a special unit ( mixer). After the mixing time, the samples were put on sediment, the sedimentation time was up to 24 hours. The oil and the separated water were subjected to physicochemical analysis. The viscosity of the processed emulsion after introducing a solution of reagents and fresh water into it, heating and mixing from 1251 cP decreased to 18 cP. The dynamics of the separation of water from oil, the residual content of water and iron sulfide in the oil, estimated the depth of destruction of persistent oil emulsions. The conditions for the destruction of the emulsion, the number of introduced reagents and water, as well as the results are shown in the table. The analysis of the results obtained, shown in the table, shows that the combination of the described examples of treatment of persistent oil emulsion allows us to destroy the initial emulsion with sufficient depth and obtain oil with a low content of residual water and iron sulfide.

Claims (1)

СПОСОБ РАЗРУШЕНИЯ СТОЙКИХ НЕФТЯНЫХ ЭМУЛЬСИЙ путем введения деэмульгатора и воды, нагрева и перемешивания, отличающийся тем, что, с целью повышения глубины разрушения, в качестве деэмульгатора используют маслорастворимый деэмульгатор типа блок-сополимера окисей этилена и пропилена на основе этилендиамина в смеси с реагентом на основе сульфоната МЛ-72 и легким бензиновым дистиллятом, взятые в количестве 0,15 - 0,3 кг/т нефти, 1,0 - 2,0 кг/т нефти и 80 - 100 кг/т нефти соответственно, введение пресной воды проводят до достижения обводненности эмульсии 80 - 90 мас.% и нагрев полученной эмульсии проводят до температуры на 5 - 15oС выше температуры начала ее кипения.METHOD FOR DESTRUCTION OF PERMANENT OIL EMULSIONS by introducing a demulsifier and water, heating and mixing, characterized in that, in order to increase the depth of destruction, an oil-soluble demulsifier of the ethylene diamine-based block copolymer type based on ethylene diamine mixed with a reagent based on reagent is used as a demulsifier. ML-72 and light gasoline distillate, taken in the amount of 0.15 - 0.3 kg / t of oil, 1.0 - 2.0 kg / t of oil and 80 - 100 kg / t of oil, respectively, the introduction of fresh water is carried out until emulsion water content 80 - 90 wt.% And heating the resulting emulsion is carried out to a temperature of 5 - 15 o above the temperature of the beginning of its boiling.
SU4037936 1985-12-17 1985-12-17 Process for disintegrating stable oil emulsions RU1360185C (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102060971A (en) * 2010-11-18 2011-05-18 句容宁武高新技术发展有限公司 Preparation method of ethidene diamine type polyether demulsifying agent

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Авторское свидетельство СССР N 1286617, кл. C 10G 33/04, 1984. *
Авторское свидетельство СССР N 701136, кл. C 10G 33/04, 1977. *
Авторское свидетельство СССР N 929696, кл. C 10G 33/04, 1984. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102060971A (en) * 2010-11-18 2011-05-18 句容宁武高新技术发展有限公司 Preparation method of ethidene diamine type polyether demulsifying agent
CN102060971B (en) * 2010-11-18 2012-07-25 句容宁武高新技术发展有限公司 Preparation method of ethidene diamine type polyether demulsifying agent

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