GB/T 24212-2025Methylnaphthalene oil (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 for standardization documents" Drafting is required.

This document replaces GB/T 24212-2009 "Methylnaphthalene oil". Compared with GB/T 24212-2009, except for structural adjustments and editorial changes, In addition to the above, the main technical changes are as follows.

a) The technical indicators of methyl naphthalene oil have been changed (see 4.1, 4.1 of the 2009 edition);

b) Added the determination method of phenol content (see 5.5);

c) Added the viscosity determination method (see 5.6);

d) Added the determination method of crystals at 15°C (see 5.7);

e) The batch rules have been changed (see 6.2, 6.3 of the 2009 edition);

f) Added qualification determination rules (see 6.5);

g) Deleted controversial content (see 6.6 of the 2009 edition);

h) Added safety precautions (see 8.5).

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document is under the jurisdiction of the National Coal Chemical Industry Standardization Technical Committee (SAC/TC469).

This document was drafted by: Baowu Carbon Technology Co., Ltd., Xingtai Xuyang Coal Chemical Co., Ltd., Ansteel Group Beijing Research Institute Co., Ltd., Metallurgical Industry Information Standards Research Institute.

The main drafters of this document are: Zhang Lili, Lu Ziyi, Fei Jianhua, Yang Lu, Pang Keliang, Wang Xiaoyuan, Shen Zhenhua, Wang Qingfeng, Zheng Youzhi, Yang Xiaowei, Hao Liping and Liu Ping.

The previous versions of this document and the documents it replaces are as follows.

— GB/T 24212-2009. Methyl naphthalene oil

1 Scope

This document specifies the technical requirements, inspection rules, packaging, marking, transportation, storage and quality certificate, safety precautions for methyl naphthalene oil. The test method is described.

This document applies to the methylnaphthalene oil fraction obtained by high temperature distillation of coal tar.

2 Normative references

GB 190

GB/T 1999

GB/T 2281

GB/T 2288

GB/T 8170

GB/T 9977

GB/T 24206

GB/T 24207

GB/T 24209

3 Terms and definitions

The terms and definitions defined in GB/T 9977 apply to this document.

4 Technical requirements

4.1 The technical indicators of methyl naphthalene oil shall comply with the requirements of Table 1. Table 1 Technical indicators Indicator name index For washing benzene, for processing and for blending Density (20°C)/(g/cm3) 1.020~1.050 Methylnaphthalene (alpha beta) content (mass fraction)/% >= 40.0 50.0 - Naphthalene content (mass fraction)/% <= 10.0 12.0 - Phenol content (volume fraction)/% <= 0.5 - -