T/AQB 60-2024 Nitrochlorobenzene low oil content at the ortho position

Scope

Scope: This document defines the terms and definitions of nitrochlorobenzene meta-position low oil (hereinafter referred to as "meta-position low oil"), and stipulates the requirements, test methods, inspection rules, as well as marking, labeling, accompanying documents, packaging, transportation, and storage. This document applies to the quality control of meta-position low oil. Main technical content: I. Introduction This standard specifies the requirements, safety information, test methods, inspection rules, and marking, labeling, and accompanying documents, packaging, transportation, and storage of nitrochlorobenzene meta-position low oil. II. Standard scope and applicable fields This standard applies to the quality control of nitrochlorobenzene meta-position low oil produced during the nitration reaction of chlorobenzene to form para- and ortho-nitrochlorobenzene. It is mainly used as a raw material for the production of pure meta-nitrochlorobenzene. III. Main technical indicators 1. Chemical composition · Meta-nitrochlorobenzene purity: not less than 30.0%, to ensure the use and output of downstream enterprises. · Para- and ortho-nitrochlorobenzene purity: not more than 68.0%, to reduce the consumption of production enterprises under the premise of ensuring safe production. · Low-boiling substance content and high-boiling substance content: not more than 0.40% and 0.10%, respectively. These substances will be mixed into nitrochlorobenzene meta-position low oil during the melting and crystallization process. · 2,4-dinitrochlorobenzene content: not more than 0.05%, to ensure safety during storage, transportation, and use. · Water content: not more than 0.20%. 2. Stability Under normal temperature and pressure, the nitrochlorobenzene meta-position low oil indicators do not change by more than 1% within two years of storage. IV. Parameter setting basis 1. The setting of meta-nitrochlorobenzene purity refers to the enterprise standard pr

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