中低温煤焦油脱水及酚类物提取的研究.pdf

分类号:
学校代码
UDC
密级
硕士学位论文
中低温煤焦油脱水及酚类物提取的研究
Study on Dehydration of Low Temperature Coal-tar
and Extraction Condition of Phenolic Compound
研究生
孙会青
导师:曲思建研究员
王利斌研究员
学科专业:化学工艺
研究方向:
煤炭热解
培养单位:煤科总院煤化工分院
煤炭科学硏究总院
2009年3月
Y1853760
煤炭科学研究总院硕士学位论文
摘要
低温煤焦油中含有许多珍贵化合物,但目前多作为液体燃料在市场上销售,
这是对资源的极大浪费。而低温煤焦油加工方法中较为成熟的仅是加氢精制工
艺,但此工艺有很大的局限性,要求生产规模大,加工成本太高。低温焦油的
合理分离加工日益引起国家和众多企业的重视,与其相关的技术问题亦成为
亟待解决的课题。
在进行本课题研究前,为了进一步了解低温煤焦油的生产的相关政策、工
艺、产能以及存在的问题等,对低温煤焦油的主要的典型生产地区进行了调研,
熟悉了与其相关的基本情况。
本文以典型的神木和大同煤焦油为研究对象,通过常规分析,了解了低温煤
焦油的基本性质。因生产中所得到的低温煤焦油产品含有少量的水,在加工生产
前,需对其进行脱水处理,本文借鉴高温煤焦油共沸蒸馏脱水的方法,对采集到
的样品进行脱水处理研究,并达到了预期效果。低温煤焦油中酚含量远高于高温
煤焦油,本文选用碱洗的方法对神木焦油提酚工艺条件进行了研究,从而得到最
佳的碱洗条件为使用浓度为15%的碱液在60℃的温度下先用其30%后70%两次
碱洗煤焦油。从而为工业上低温煤焦油脱水、提酚加工生产提供了参考依据。
关键词:低温煤焦油;共沸蒸馏;脱水;提酚
炭科学研究总院项上学位论文
Abstract
The low temperature coal-tar includes many precious compound, but at the
present it is often selled as the liquid fuel in the market, this creates enormous waste
to the resources. A more mature processing method of low-temperature coal-tar is the
hydrogenation refining craft, but this craft has a lot of limi ations, its request scale of
production is big, the processing cost is too high. The reasonable separation process of
low temperature coal-tar was caused recognition of goverment and numerous
enterprises day by day, the related technical questions becomes also to be solved
urgently
To further understand the related policy, the craft, the output as well as the
existence question of the low temperature coal-tar production before conducting this
topic research. Investigation and study on the main model producing areas have been
carried to familiar with its related basic situation
The typical low temperature coal-tar samples were taken form Shenmu and
Datong as the objects of study. By the routine analysis, the basic properties of the low
temperature coal-tar were understood. Because the low temperature coal-tar products
contents a few water, dehydration has to be carry out to process the coal-tar. The
azeotropic distillation method for dehydration was reference to the high temperature
coal-tar processing, and has achieve the expectation effect. This soda wash method
to extract phenol compounds was researched and the prefered wash conditions were
obtained that is soda concentration 15%, the temperature 60 and first 30%then
70% lye quantity to extraction. Thus this article provides the reference for the
dehydration and the phenols extraction processing for low temperature coal-tar
Keywords: low temperature coal-tar azeotropy distillation, dehydration, phenols
extraction