Patent · US Expired

Method for improving the pour point of petroleum oils

US5281329A · kind A · utility

7Cited by

22References

6Claims

0Family size

Assignee

Rohm Co., Ltd. · JP

Inventors

Michael Mueller · Bensheim, DE
Heinz Gruenig · Pfungstadt, DE

Key dates

Filing date	Mar 30, 1992
Grant date	Jan 25, 1994
Priority date	—
Expiry date	Mar 30, 2012

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/0391
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Crude oils, vacuum gas oils, and residual oils containing long chain polyalkyl (meth)acrylates as flow improvers, wherein the long chain polyalkyl (meth)acrylates are a mixture of PA1 (A) a polyalkyl (meth)acrylate P1 having an onset of crystallization at temperatures above 15.degree. C. (measured as the cloud point of a 0.1 % solution in isooctane) and PA1 (B) a polyalkyl (meth)acrylate P2 having an onset of crystallization at temperatures at or below 15.degree. C., with the proviso that there is a temperature difference of at least 5 Centigrade degrees between the onset of the crystallization of polyalkyl (meth)acrylates P1 and the onset of crystallization of polyalkyl (meth)acrylates P2.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.