GB/T 4209-2022Sodium silicate for industrial use (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 replaces GB/T 4209-2008 "Industrial Sodium Silicate". Compared with GB/T 4209-2008, except for structural adjustments and editorial changes Besides, the main technical changes are as follows.

a) Changed the molecular formula (see Chapter 4, Chapter 3 of the 2008 edition);

b) Added the representation method of encoding (see 5.2);

c) Changed the code of liquid sodium silicate and solid sodium silicate (see 6.2, 5.2 of the 2008 edition);

d) Two specifications of liquid sodium silicate (L-250-37) and solid sodium silicate (S-280) were added (see 6.2);

e) The iron content index requirements for the superior liquid sodium silicate products, first-class products and solid sodium silicate superior products have been improved (see 6.2, 2008 edition). 5.2);

f) The density index requirements for liquid sodium silicate have been changed (see 6.2, 5.2 of the 2008 edition);

g) Modified the requirements for the modulus of liquid sodium silicate and solid sodium silicate (see 6.2, 5.2 of the 2008 edition);

h) The soluble solid content index requirements for qualified products of solid sodium silicate have been improved (see 6.2, 5.2 of the 2008 edition);

i) Changed the preparation steps of the liquid sodium silicate test solution and the pipetting volume of the test solution in the iron content determination method [see 7.3.4.1.1 and 7.3.4.4, 6.4.4.2a) and 6.4.4.4 of the 2008 edition];

j) Changed the preparation method of liquid sodium silicate test solution in the determination method of sodium oxide content [see 7.6.4.1.1, 2008 edition 6.7.4.1a)];

k) The calculation formula of sodium oxide content has been changed (see 7.6.5, 6.7.5 of the 2008 edition);

l) Modified the calculation formula of silica content (see 7.7.4, 6.8.4 of the 2008 edition);

m) The test procedure for the determination method of alumina content has been changed (see 7.10.4, 6.11.4 of the 2008 edition).

1 Scope

This document specifies the classification and coding, requirements, test methods, inspection rules, signs, labels, packaging, transportation and storage of industrial sodium silicate.

This document applies to industrial solid sodium silicate and industrial liquid sodium silicate.

Note: Liquid sodium silicate is mainly used in chemical raw materials, fillers, binders, detergents, auxiliaries, preservatives, coating agents, curing agents, flame retardants, etc. solid sodium silicate Mainly used in the manufacture of liquid sodium silicate.

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 3049-2006 General method for the determination of iron content in industrial chemical products 1,10-phenanthroline spectrophotometric method

GB/T 6678 General Rules for Sampling of Chemical Products

GB/T 6682-2008 Specifications and test methods for water used in analytical laboratories

GB/T 8170 Numerical Rounding Rules and Representation and Judgment of Limit Values

HG/T 3696.1 Preparation of standard solutions, preparations and products for chemical analysis of inorganic chemical products - Part 1: Standard titration solution liquid preparation

HG/T 3696.2 Preparation of standard solutions, preparations and products for chemical analysis of inorganic chemical products - Part 2: Standard solutions for impurities liquid preparation

HG/T 3696.3 Preparation of standard solutions, preparations and products for chemical analysis of inorganic chemical products - Part 3: Preparations and products preparation

3 Terms and Definitions

There are no terms and definitions that need to be defined in this document.

4 Molecular formula

Na2O·nSiO2 (n >1.0).

5 Classification and coding