Hydrocarbon Fluid Cold Flow via Paraffin Ratio and Copolymer
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Solution Overview
Problem
Hydrocarbon fluids with low aromatic content and improved cold temperature properties, particularly a low pour point, are needed for various applications where narrow boiling ranges and low VOC emissions are essential.
Innovation Solution
A composition comprising a hydrocarbon fluid with less than 1000 ppm aromatics, a specific weight ratio of normal paraffins to isoparaffins, and a copolymer consisting of repetition units of ethylene, vinyl acetate, and optionally other monomers, which is added to the hydrocarbon fluid to lower its pour point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If narrow boiling point range hydrocarbon cuts are used, then flash point increases and VOC emissions are prevented, but pour point deteriorates at cold temperatures
Solution Approach 1:
The invention changes the chemical composition parameters of the hydrocarbon fluid by strictly limiting aromatics to less than 1000 ppm and controlling the normal paraffin/isoparaffin weight ratio between 0.2 and 1.0, while maintaining a narrow boiling point range of 265-380°C. This specific parameter optimization resolves the contradiction by achieving both high flash point and improved pour point through compositional control
Solution Approach 2:
The invention creates a composite hydrocarbon fluid system combining specific proportions of paraffins, isoparaffins, and naphthenes (5-40% wt naphthenic compounds) within a narrow boiling range. This composite composition achieves synergistic effects where the mixed hydrocarbon structure provides both high flash point characteristics and improved cold temperature flow properties
2Manufacturing precision
If aromatic content is reduced to less than 1000 ppm, then solvency power becomes better-defined, but pour point deteriorates
Solution Approach 1:
The invention optimizes the hydrocarbon composition by reducing aromatics to less than 1000 ppm while simultaneously adjusting the normal paraffin/isoparaffin weight ratio to 0.2-1.0 and incorporating 5-40% wt naphthenic compounds. This multi-parameter optimization maintains better-defined solvency power while improving pour point through the balanced hydrocarbon structure
Data Source
AI summary
A composition includes (a) a hydrocarbon fluid comprising less than 1000 ppm by weight of aromatics, a weight ratio normal paraffins/isoparaffins ranging from 0.2 to 1.0 and having an initial boiling point and a final boiling point in the range from 265° C. to 380° C., and (b) a copolymer derived from alpha-olefin monomers and vinyl acetate type monomers and optionally acrylate type monomers.