Summary

(1)　 The Ningxia Hui Autonomous Region's Ecological Environment Department received a letter regarding the management of coal tar. After reviewing the matter, the department replied as follows. Coal tar is a significant by-product of the coal distillation process, with a complex composition. It can be divided into high-temperature coal tar and medium-low temperature coal tar based on the distillation temperature and furnace type. High-temperature coal tar is primarily composed of benzene, toluene, xylene, naphthalene, and phenanthrene, and its components can be separated and purified through various methods such as distillation, crystallization, extraction, polymerization, and thermal decomposition to produce naphtha oil, wash oil, and phenanthrene oil. Extracting these components from high-temperature coal tar is a common practice in the industry and helps to efficiently utilize resources. Coal tar that meets the technical requirements of the "Coal Tar Standard" (YB/T5075) does not fall under the category of solid waste as defined in the "Solid Waste Identification Standard" (GB 34330) and is therefore not subject to solid waste management.

Original

(1)　 宁夏回族自治区生态环境厅：

(2)　 你厅《关于咨询煤焦油管理属性有关问题的函》（宁环函〔2025〕52号）收悉。经研究，函复如下。

(3)　 一、煤焦油是煤干馏过程中产生的重要产物，成分复杂。根据煤干馏温度、炉型等可将煤焦油分为高温煤焦油和中低温煤焦油。其中，高温煤焦油主要由苯、甲苯、二甲苯、萘、蒽等芳烃组成，通常采用蒸馏、结晶、萃取、聚合和热解等方法将其中的组分逐级分离，再进行提纯精制，得到萘油、洗油、蒽油等。从高温煤焦油中提取可满足市场需求的各类化工产品，是行业通行的主要做法，也有助于资源的高效利用。

(4)　 二、来函所述的符合《煤焦油标准》（YB/T5075）技术要求的煤焦油，不属于《固体废物鉴别标准 通则》（GB 34330）中规定的固体废物，不作为固体废物管理。

(5)　 特此函复。

(6)　 生态环境部办公厅

(7)　 2025年1月24日

(8)　 （此件社会公开）

(9)　 抄送：其他省、自治区、直辖市生态环境厅（局），新疆生产建设兵团生态环境局。