GB/T 7717.1-2022Acrylonitrile for industrial use—Part 1: Specification (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" drafted.

This document is part 1 of GB/T 7717 "Industrial Acrylonitrile". GB/T 7717 has released the following parts.

--- Part 1: Specifications;

--- Part 5: Determination of acidity, pH value and titration value;

--- Part 8: Spectrophotometric method for the determination of total aldehyde content;

--- Part 9: Determination of total cyanide content by titration;

--- Part 10: Spectrophotometric method for the determination of peroxide content;

--- Part 11: Spectrophotometric method for the determination of iron and copper content;

--- Part 12: Determination of purity and impurity content by gas chromatography;

--- Part 15: Determination of p-hydroxyanisole content;

--- Part 16: Determination of iron and copper content by graphite furnace atomic absorption spectrometry and inductively coupled plasma mass spectrometry.

This document replaces GB/T 7717.1-2008 "Industrial Acrylonitrile Part 1: Specifications". Compared with GB/T 7717.1-2008, In addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) Modified the scope (see Chapter 1, Chapter 1 of the.2008 edition);

b) Two chapters "Terms and Definitions" and "Product Classification" were added (see Chapters 3 and 4);

c) Modified the product classification method (see Table 1, Table 1 of the.2008 edition);

d) Modified the quality requirements for density, pH value, moisture, total aldehyde, acetone, propionitrile, azole and methacrylonitrile (see Table 1, 2008 edition Table 1);

e) Added test methods and arbitration methods for chroma, density, moisture, copper, iron content and acrylonitrile purity and impurities (see Table 1);

f) The items of refractive index, non-volatile matter and oxidation stability have been added (see Table 2);

g) Test methods for refractive index, non-volatile matter, and oxidation stability are added (see Table 2);

h) Modified the expression of sampling (see Chapter 6, 4.3 of the 2008 edition);

i) Modified the inspection classification, added the purity of acrylonitrile, azole and methacrylonitrile in the delivery inspection, changed the titration value to type inspection, and added Added the starting conditions for type inspection and the description of Table 2 items agreed upon by both parties (see 7.1, 4.1 of the 2008 edition);

j) Modified the group batch, re-inspection and judgment of the inspection rules, and deleted the delivery acceptance (see Chapter 7, Chapter 4 of the 2008 edition);

k) Modified marking, transportation and storage (see Chapter 8, Chapter 9, Chapter 5 of the 2008 edition);

l) Move the content of safety tips into Appendix A (see Appendix A, Chapter 6 of the 2008 edition).

Introduction

GB/T 7717 "Industrial Acrylonitrile" includes product standards and supporting method standards for industrial acrylonitrile. In order to facilitate management and use, It consists of the following parts.

--- Part 1: Specifications. It specifies the product classification, technical requirements and test methods, sampling, inspection rules and standards of acrylonitrile for industrial use. signs, labels and accompanying documents, packaging, transport and storage.

--- Part 5: Determination of acidity, pH value and titration value. Determination of acidity by chemical titration; pH measurement by pH meter; Potentiometric drop Determine the titer value.

--- Part 8: Determination of total aldehyde content Spectrophotometric method. It is the reaction of total aldehydes and derivatizing reagents to produce colored anionic dyes.

The absorbance value was measured, and the total aldehyde content was calculated.

--- Part 9: Determination of total cyanide content by titration. The cyanide in the sample is extracted with an alkaline solution of potassium iodide to make it soluble The total cyanide content was calculated by titration with silver nitrate standard titration solution.

--- Part 10: Spectrophotometric method for the determination of peroxide content. Under the action of acetic anhydride, peroxide reacts with potassium iodide Yellow iodide ions should be generated, and the content of peroxide is calculated by measuring the absorbance value of the solution.

--- Part 11: Determination of iron and copper content by spectrophotometry. Evaporate the sample to dryness and digest with mixed acid to remove organic matter, and iron After the ion and copper ions react with the derivatizing reagent respectively, a colored complex is formed, which is measured with a spectrophotometer, and the iron and copper are calculated. content.

--- Part 12: Determination of purity and impurity content by gas chromatography. is the determination of the purity of acrylonitrile samples by gas chromatography and impurity content.

--- Part 15: Determination of p-hydroxyanisole content; including spectrophotometry and gas chromatography. where spectrophotometry uses The absorbance of the sample was directly measured at 295 nm by an ultraviolet spectrophotometer, and the content of p-hydroxyanisole was calculated; gas chromatography method The content of p-hydroxyanisole was separated and determined by gas chromatography.

--- Part 16: Determination of iron and copper content by graphite furnace atomic absorption spectrometry and inductively coupled plasma mass spectrometry. of which stone Ink furnace atomic absorption method is to measure the absorbance at the characteristic wavelengths of iron and copper after diluting the sample with ethanol, and calculate the Iron and copper content; inductively coupled plasma mass spectrometry is to dilute the sample with ethanol, add the internal standard solution, and use the characteristics of iron and copper to determine the content of iron and copper.

The mass spectrometry signal was collected, and the iron and copper contents were calculated.

Industrial Acrylonitrile Part 1: Specifications Warning---If proper precautions are not followed, the products covered by this document may be damaged during production, transportation, handling, storage and use, etc. can be dangerous. This document does not address all possible security issues. The manufacturer must explain to the user the danger of the product and the safety in use.

Safety and protective measures, the user of this document is responsible for taking appropriate safety and health measures, and to ensure compliance with relevant national regulations. condition.

1 Scope

This document specifies the product classification, technical requirements and test methods, sampling, inspection rules, signs, labels and accompanying documents of acrylonitrile for industrial use Documentation, Packaging, Shipping and Storage.

This document applies to acrylonitrile produced by ammoxidation of propylene. This product is mainly used for the production of synthetic fibers (including carbon fibers), plastics, cyanogens Raw materials for rubber, acrylic resin, paint, adhesive, amide, adiponitrile and medicine.

Molecular formula. C3H3N Structural formula. CH2=CH-CN Relative molecular mass. 53.063 (according to.2018 international relative atomic mass)

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 2013-2010 Density determination method of liquid petrochemical products

GB/T 3143 Color determination method of liquid chemical products (Hazen unit---platinum-cobalt color number)

GB/T 3723 General Rules for Sampling Safety of Chemical Products for Industrial Use

GB/T 4472 Determination of Density and Relative Density of Chemical Products

GB/T 6283 Determination of moisture content in chemical products Karl Fischer method (general method)

GB/T 6324.2 Test methods for organic chemical products - Part 2: Determination of dry residues after evaporation of volatile organic liquids on a water bath

GB/T 6324.6 Test methods for organic chemical products - Part 6: Determination of liquid chromaticity Tristimulus value colorimetric method

GB/T 6324.8 Test methods for organic chemical products - Part 8: Determination of moisture in liquid products - Karl Fischer Coulomb coulometric method

GB/T 6678 General Rules for Sampling of Chemical Products

GB/T 6680 General Rules for Sampling of Liquid Chemical Products

GB/T 7534 Determination of Boiling Range of Volatile Organic Liquids for Industrial Use

GB/T 7717.5 Industrial Acrylonitrile Part 5: Determination of Acidity, pH Value and Titration Value

GB/T 7717.8 Determination of Total Aldehyde Content in Industrial Acrylonitrile Spectrophotometric Method

GB/T 7717.9 Determination of Total Cyanide Content in Industrial Acrylonitrile by Titration

GB/T 7717.10 Industrial Acrylonitrile Part 10: Determination of Peroxide Content Spectrophotometric Method

GB/T 7717.11 Industrial Acrylonitrile Part 11: Determination of Iron and Copper Content Spectrophotometric Method