Polymeric dispersants for petroleum process streams
A technology of polymers and dispersions, which is applied in the petroleum industry, processing hydrocarbon oils, and devices for coating liquids on surfaces, etc., and can solve problems such as unsuitability of anhydride-functional polymers
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
example 1
[0058] Copolymers of C24-C28 alpha-olefins with maleic anhydride (CAS No. 68459-79-0) were obtained according to the procedure outlined in Comer et al., US Patent No. 5,214,224. 50 g of polymer were 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. No peak formation associated with imide groups was observed during the reaction.
[0059] 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...
example 2
[0061] The fouling of petroleum products in the presence of the polymer of Example 1 was determined by the following test method. Precipitation measured by this procedure predicts relative fouling behavior in petroleum process streams.
[0062] The equipment used in the experiment consisted of a 12.5 mL graduated conical centrifuge tube; a timer and a light box and / or a flashlight to facilitate observation of the sediment present in the dark petroleum liquid. In each test, centrifuge tubes were charged with a mixture of Crude A (from Tesoro Refinery, Anacortes, WA) or Crude B (Total Refinery, Port Arthur, TX) with 15 ppm of the antifouling polymer of Example 1; a mixture was formed by mixing the corresponding amount of the 26 wt% solids dispersion of Example 1 with the crude oil sample and then adding 10 mL of this mixture to a centrifuge tube. Allow the contents of the tube to stand at 20°C for 2 hours. After standing, measure the volume of the sediment at the bottom of the...
example 3
[0069] The pour point of petroleum products was determined using ASTM D-97 with HAN as solvent. A 15% by weight solids dispersion of Product C (alpha olefin / maleic anhydride copolymer) was found to have a pour point of -12°C. A 15% by weight dispersion of the polymer of Example 1 was found to have a pour point of -26°C in HAN. At -26°C, it was further observed that the dispersion of the polymer of Example 2 did not precipitate.
[0070] As can be appreciated from the foregoing, the polymer of Example 1 provides a concentrate with a pour point low enough to provide product pumpability and pourability in the field, even under the winter conditions commonly encountered. Additionally, the pumpable / pourable product comprising the polymer of Example 1 remained substantially single phase when subjected to temperatures as low as -26°C; ie, the dispersion was stable at this temperature.
PUM
| Property | Measurement | Unit |
|---|---|---|
| pour point | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More