GB/T 23962-2023Ethylamine for industrial use (English PDF)

Foreword

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

This document replaces GB/T 23962-2009 "Monoethylamine for Industrial Use". Compared with GB/T 23962-2009, except for structural adjustment and editing In addition to sexual changes, the main technical changes are as follows.

---Delete the qualified product indicators of monoethylamine (anhydrous) and monoethylamine (70% aqueous solution), and cancel the product grade (see Table 1 of the 2009 edition);

---"Monoethylamine" in monoethylamine (anhydrous) products was changed from ">=99.5%" (excellent product) to ">=99.7%" (see Table 1, 2009 version Table 1);

---Changed the measurement method of appearance (see 6.2, 5.3 of the 2009 edition);

--- Changed the preparation method of monoethylamine (anhydrous) test solution (see 6.3 and Appendix A, 2009 version of 5.4);

---The determination method of total alkalinity has been changed (see 6.5.2, 5.6.2 of the 2009 version);

---Changed the injection volume and calculation formula for ammonia content determination (see Table 2 and 6.7.5, Table 2 and 5.8.6 of the 2009 version);

---Changed the method for determination of moisture in monoethylamine (anhydrous) (see 6.8, 5.4 and 5.9 of the 2009 edition);

---The "Safety" part has been adjusted to an informative appendix (see Appendix C, Chapter 8 of the 2009 edition).

1 Scope

This document specifies the classification and nomenclature, requirements, test methods, inspection rules and marking, packaging, transportation and storage of industrial monoethylamine.

This document applies to industrial monoethylamine produced by catalytic ammoniation using ethanol as raw material in the presence of hydrogen.

Note: The molecular formula of monoethylamine is C2H7N, the structural formula is CH3-CH2-NH2, and the relative molecular mass is 45.08 (according to the 2022 international relative atomic mass).

2 Normative reference documents

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

GB 190 Dangerous goods packaging markings

GB/T 601 Preparation of chemical reagent standard titration solution

GB/T 603 Preparation of preparations and products used in chemical reagent test methods

GB/T 3143 Liquid chemical product color determination method (Hazen unit---platinum-cobalt color number)

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

GB/T 6324.8 Test methods for organic chemical products Part 8: Determination of moisture content of liquid products by Karl Fischer coulombometry

GB/T 6678 General principles for sampling of chemical products

GB/T 6680 General rules for sampling of liquid chemical products

GB/T 6682 Specifications and test methods for water used in analytical laboratories

GB/T 8170 Numerical rounding rules and representation and determination of limit values

GB/T 9722 General rules for gas chromatography with chemical reagents

GB/T 23961 Determination of low-carbon fatty amine content by gas chromatography

3 Terms and definitions

There are no terms or definitions to be defined in this document.

4 Classification and naming

Industrial monoethylamine is divided into monoethylamine (anhydrous) and monoethylamine (70% aqueous solution) according to the water content of the product.

5 Requirements

5.1 Appearance. Transparent liquid, no visible mechanical impurities.

5.2 Monoethylamine for industrial use should comply with the technical requirements in Table 1.