Methods for quantifying n-methyl-2-pyrrolidone

Patent metadata

Field	Value
Publication number	US-2018284084-A1
Application number	US-201615762239-A
Country	US
Kind code	A1
Filing date	Oct 19, 2016
Priority date	Oct 20, 2015
Publication date	Oct 4, 2018
Grant date	—

Abstract

The presently disclosed subject matter relates to methods for quantifying the amount of N-methyl-2-pyrrolidone (NMP) in a sample. In one exemplary embodiment, a method for the quantification of N-methyl-2-pyrrolidone (NMP) in a sample includes introducing a sample that includes 1,3-butadiene and NMP, if any, into a gas chromatography system coupled to a nitrogen phosphorous detector to produce a first signal; and comparing the first signal to a second signal produced from a standard of a known NMP concentration, to quantify the amount of NMP in the sample, where the sample is not concentrated for NMP prior to the introduction of the sample into the gas chromatography system.

First claim

1 . A method for the quantification of N-methyl-2-pyrrolidone (NMP) in a sample, comprising introducing a sample comprising 1,3-butadiene and NMP, if any, into a gas chromatography system coupled to a nitrogen phosphorous detector to produce a first signal for quantifying the amount of NMP in the sample, wherein the sample is not concentrated for NMP prior to the introduction of the sample into the gas chromatography system.

2 . The method of claim 1 , wherein the sample is directly introduced into the gas chromatography system.

3 . The method of claim 1 , wherein the sample is generated from steam cracking of naphtha.

4 . The method of claim 1 , further comprising determining the area under the first signal to determine the amount of NMP in the sample.

5 . A method for the quantification of N-methyl-2-pyrrolidone (NMP) in a sample comprising:
(i) introducing a sample comprising 1,3-butadiene and NMP, if any, into a gas chromatography system coupled to a nitrogen phosphorous detector to produce a first signal; and (ii) comparing the first signal to a second signal produced from a standard of a known NMP concentration, to quantify the amount of NMP in the sample, wherein the sample is not concentrated for NMP prior to the introduction of the sample into the gas chromatography system.

6 . The method of claim 5 , wherein the sample is directly introduced into the gas chromatography system.

7 . The method of claim 5 , wherein the sample is generated from steam cracking of naphtha.

8 . The method of claim 5 , wherein the concentration of NMP in the standard is selected from the group consisting of about 500 ppb, about 1 ppm, about 5 ppm, or about 10 ppm.

9 . The method of claim 5 , wherein comparing the first signal to the second signal comprises comparing the area of the first signal with the area of the second signal to determine the amount of NMP in the sample.

10 . A method for the quantification of N-methyl-2-pyrrolidone (NMP) in a sample comprising:
(i) introducing a C4 hydrocarbon sample into a gas chromatography system coupled to a nitrogen phosphorous detector to produce a first signal; and (ii) comparing the first signal to a second signal produced from a standard of a known NMP concentration, to quantify the amount of NMP in the sample, wherein the sample is not concentrated for NMP prior to the introduction of the sample into the gas chromatography system.

11 . The method of claim 10 , wherein the sample is directly introduced into the gas chromatography system.

12 . The method of claim 10 , wherein the sample is generated from steam cracking of naphtha.

13 . The method of claim 10 , wherein the concentration of NMP in the standard is selected from the group consisting of about 500 ppb, about 1 ppm, about 5 ppm, or about 10 ppm.

14 . The method of claim 10 , wherein comparing the first signal to the second signal comprises comparing the area of the first signal with the area of the second signal to determine the amount of NMP in the sample.

15 . The method of claim 10 , wherein the amount of NMP in the sample can be as low as about 100 ppb.

16 . The method of claim 5 , wherein the concentration of NMP in the standard is about 500 ppb.

17 . The method of claim 5 , wherein the concentration of NMP in the standard is about 1 ppm.

18 . The method of claim 5 , wherein the concentration of NMP in the standard is about 5 ppm.

19 . The method of claim 5 , wherein the concentration of NMP in the standard is about 10 ppm.

20 . The method of claim 10 , wherein the concentration of NMP in the standard is about 500 ppb.

Assignees

• Sabic Global Technologies Bv

Inventors

• Patel Prakash Vallabhbhai
• Al-Rezhan Mohammad Hussain
• Al-Ghamdi Mohammed S

Classifications

• G01N30/88 Primary

  Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 · CPC title

• G01N30/64

  Electrical detectors · CPC title

• G01N30/68

  Flame ionisation detectors · CPC title

• G01N2030/8854

  involving hydrocarbons · CPC title