The technology of separating normal paraffins from the naphtha through the adsorption process was studied to optimize the steam cracking feedstock and utilize the naphtha resource properly.

It was found that the carbon number of the separated normal paraffins was in the range of 20-38 with relatively high purity as identified by the GC/MS data.

The development of adsorbent for normal paraffin adsorption-separation in these decades is discussed in this paper.

N-paraffin determinat-ion in diesel oil by high temperature gas chromatography;

The combined evaluation parameter is defined from dewaxing ratio,ΔCFPP and the sum of n-paraffin whose carbon number is 20 and.

The research developments of n-paraffins hydroisomerization were reviewed.

The Analysis and Significance of N-alkane in the Neogene Red-earth in Northern China;

Characteristic and Sources of n-alkanes Bound to PM_(10) in the Air of Xiamen;

Prediction of the settling of n-alkane in diesel by thermodynamic model;

Use of SPE ZSM-5 for rapid isolation normal alkane fraction in crude oils;

They are identified by means of the comparison of the fingerprints of normal alkane in them,the analyses of the relative concentration distributions of normal alkane in them,the character ratios of them,and the fuzzy cluster analysis of their fingerprint information.

Carbon distribution and content of normal alkane and isoalkane in rubber waxes are measured by using high temperature gas chromatography.

The experimental results demonstrate that normal fatty acids from C 12 to C 28 are dominant in combined acid fraction, but concentrated mainly in low carbon number (C .

The experimental results demonstrate that normal fatty acids from C 12 to C 28 are dominant in combined acid fraction, but concentrated mainly in low carbon number (C 16 ,C 18 .