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Antifouling compositions for petroleum process streams

A petroleum process and composition technology, which can be used in drilling compositions, petroleum industry, processing hydrocarbon oil, etc., and can solve problems such as solubility problems

Pending Publication Date: 2019-07-19
ECOLAB USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Olefin-maleic anhydride copolymers, while effective as dispersants in such systems, are not optimal for use due to solubility issues, since some petroleum processing equipment only includes, for example, a single port for introducing additives into petroleum process streams.

Method used

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  • Antifouling compositions for petroleum process streams
  • Antifouling compositions for petroleum process streams
  • Antifouling compositions for petroleum process streams

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0081] According to the procedure outlined in Comer et al., US Patent No. 5,214,224, polyalkenylsuccinic acid, which is a copolymer of C24-C28 alpha-olefins and maleic anhydride (CAS No. 68459-79-0), was obtained. 50 g of polymer (obtained as solid at 100% active polymer) was then dispersed in 100 g of HAN (heavy aromatic naphtha) and the dispersion was heated to 60-65°C with constant stirring. Then 20 g of oleylamine (20 g) was slowly added to the mixture over 30 minutes. The temperature of the reaction mixture was observed to rise to about 80°C. The mixture was stirred for an additional 2 hours while maintaining the temperature at 60-65°C. Anhydride peaks (1780 and 1711cm -1 ) disappearance and amide peak (1679cm -1 ) appears.

[0082] When it was determined that the reaction was complete, another 100 g of HAN was added to the mixture, and the mixture was stirred for another 30 minutes. The mixture was then cooled to ambient temperature and filtered to remove traces of ...

example 2-7

[0084] The inflection point and induction period of liquid petroleum products in the presence of the polymer of Example 1 were determined using ASTM-D525. Treated or untreated liquid petroleum samples were oxidized in an oxygen-filled pressure vessel at 690 kPa to 705 kPa, at 15°C to 25°C, and then heated to a temperature of 98°C to 102°C. The pressure in the vessel is monitored over time. The inflection point is defined in ASTM-D525 as the point in the pressure-time curve at which the pressure drop is exactly 14 kPa in the 15 minutes before it, and the drop is not less than 14 kPa in the next 15 minutes. The induction period in ASTM-D525 is defined as the time elapsed between placing the pressure vessel in the temperature bath and the point of inflection. Using this test, induction period and inflection point results are measured to provide an indication of the tendency of liquid petroleum products to form synthetic fouling during storage. A shorter induction period indicat...

example 8

[0091] The coker naphtha feed was tested for induction period according to ASTM-D525 using the procedures and additive compositions of Examples 2-7. No additive resulted in an induction period of 1.96 hours; 500 ppm Inhibitor C provided an induction period of 6.35 hours; and 1666 ppm of the antiscalant composition (corresponding to 500 ppm Inhibitor C) provided an induction period of greater than 8.0 hours: i.e., tested at 8.0 hours Discontinue without reaching the end of the induction period.

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Abstract

Disclosed herein are antifouling compositions including a combination of one or more dispersant polymers and one or more inhibitors, the one or more dispersant polymers including the polymerized residues of one or more alpha-olefins and maleic anhydride, further wherein the maleic anhydride residues are reacted with a primary amine; and the one or more inhibitors including a functionalized p-phenylene diamine. Concentrates of the antifouling compositions in solvents are stable and pourable at temperatures of 0 DC to -40 DC. The antifouling compositions are added to a petroleum product to forma treated petroleum product, wherein fouling by the treated petroleum product is reduced and a stable dispersion is formed over a wide range of processing conditions.

Description

technical field [0001] This invention relates to blends of polymeric dispersants with amino-functional inhibitors of petroleum products, and uses thereof. Background technique [0002] Hydrocarbon processing plants, from refineries to petrochemical plants, suffer from fouling due to the deposition of hydrocarbon by-products deposited in heat exchangers, furnaces, water circulation loops, distillation columns, vessels, pipelines, overheads and other processing equipment. These by-products include various hydrocarbons that may be present in crude oil as well as by-products of hydrocarbon refining processes. Fouling of internal surfaces of processing equipment occurs over a period of time, which can vary from months to years depending on the unit considered. [0003] It is believed that asphaltene, the foulant present in crude oil sources prior to human extraction or collection, exists as a colloidal dispersion stabilized by other components of the crude oil. These naturally ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524C10L1/192
CPCC09K8/524C10L10/18C10L1/22C10L1/223C10L1/2364C10L10/04C10G75/04C10G75/02B05D5/08
Inventor A·赛义德K·索内
Owner ECOLAB USA INC
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