CN101787298B - 一种煤沥青的净化方法 - Google Patents
一种煤沥青的净化方法 Download PDFInfo
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- CN101787298B CN101787298B CN200910147687.0A CN200910147687A CN101787298B CN 101787298 B CN101787298 B CN 101787298B CN 200910147687 A CN200910147687 A CN 200910147687A CN 101787298 B CN101787298 B CN 101787298B
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- 238000000746 purification Methods 0.000 title abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound data:image/svg+xml;base64,<?xml version='1.0' encoding='iso-8859-1'?>
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 [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract 2
- 239000003245 coal Substances 0.000 title abstract 2
- 239000011295 pitch Substances 0.000 claims abstract description 46
- 239000002904 solvent Substances 0.000 claims abstract description 42
- SMWDFEZZVXVKRB-UHFFFAOYSA-N quinoline Chemical compound 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N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000010426 asphalt Substances 0.000 claims abstract description 17
- 239000003350 kerosene Substances 0.000 claims abstract description 15
- 239000011294 coal tar pitch Substances 0.000 claims abstract description 13
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000012046 mixed solvent Substances 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 3
- 238000005119 centrifugation Methods 0.000 claims description 16
- 239000011300 coal pitch Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 14
- 238000005406 washing Methods 0.000 claims description 10
- 229940108066 Coal Tar Drugs 0.000 claims description 9
- 239000011280 coal tar Substances 0.000 claims description 9
- 238000004939 coking Methods 0.000 claims description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol Chemical compound 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OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 13
- 238000000926 separation method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000011331 needle coke Substances 0.000 abstract description 4
- 239000002283 diesel fuel Substances 0.000 abstract 2
- 229920000049 Carbon (fiber) Polymers 0.000 abstract 1
- 239000004917 carbon fiber Substances 0.000 abstract 1
- 239000000706 filtrate Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 239000011269 tar Substances 0.000 description 4
- 239000003610 charcoal Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
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Abstract
本发明涉及一种煤沥青的净化方法，其特征在于它以中温煤沥青或煤焦油软沥青作原料，用来自焦化的芳烃与来自石化的煤油或轻柴油所组成的混合溶剂，或用重柴油作溶剂，在一定温度下进行充分混合和溶解，经离心分离，尾弃残渣，将所得清液进行蒸馏，以去除并回收溶剂后，即可得到喹啉不溶物含量为0.01～0.04％的净化沥青。该方法具有工艺简单，生产成本低，分离效率高，QI含量更低的优点及效果，净化之后的沥青完全满足制造针状焦、炭纤维等产品的需要。
Description
一种煤沥青的净化方法
技术领域
[0001] 本发明涉及一种煤浙青的净化方法，属煤浙青深加工领域。
背景技术
[0002] 我国煤浙青资源非常丰富，但目前主要作为中温煤浙青、改质浙青、燃料油等初级品利用，附加值低，资源浪费严重。实际上，中温煤浙青或煤焦油软浙青芳烃含量高，是针状焦、炭纤维等高附加值产品的重要原料。问题是，制备这类高附加值产品，必须首先彻底脱除其中的喹啉不溶物(QI)。目前，关于煤浙青中喹啉不溶物的脱除工艺很不成熟。如专利文献CN101289625公开了以中温煤浙青或煤焦油软浙青为原料，利用脂肪烃溶剂与芳香烃溶剂配制混合溶剂，在萃取塔内进行抽提分离，脱除浙青中的喹啉不溶物的方法。由于浙青中的QI颗粒非常细，富含QI残渣的重相与富含净化浙青的轻相之间的密度差小，靠重力沉降速度非常慢，效率低，必须采用较高的萃取塔、较大的塔径；或者采用较高的温度，以降低体系粘度才能达到足够的分离效果。总体说来，沉降法脱除QI的效果非常有限，QI含量不能有效降低到0.01%。此外，该专利中也未给出脂肪烃的具体名称或特点。事实上，自石油馏份或产品中，适合于作溶剂的纯脂肪烃很少，价格也非常贵。
[0003] 专利文献CN101294090公开了煤浙青的离心净化方法，但在常温下操作，温度太低，溶剂对浙青的溶解能力非常低，必须使用大量的溶剂，处理负荷高，设备庞大，溶剂回收能耗非常高；使用单一成分溶剂，对QI颗粒无絮凝作用，离心效果有限，必须借助0.02~0.8 μ m的过滤器材进一步处理，过程非常复杂。
发明内容
[0004] 本发明的目的正是为了克服现有技术中存在的缺点与不足，而提供一种煤浙青的净化方法，从而可得到喹啉不溶物含量为0.01~0.04%的净化浙青，满足制造针状焦、炭纤维产品的需要，同时简化了工艺过程、降低过程成本。
[0005] 本发明的目的是通过下列技术方案实现的:
[0006] 一种煤浙青的净化方法，它按下述步骤进行:
[0007] 以中温煤浙青或煤焦油软浙青为原料，将煤浙青原料分别与溶剂在80~95°C温度下充分搅拌和混合，使浙青充分溶解，溶剂与浙青的质量比为0.9~2.0: 1，浙青溶解后在80~95°C温度下进行离心分离，尾弃残渣，所得清液进行蒸馏，去除并回收溶剂后，即可得到喹啉不溶物含量为0.01~0.04%的净化浙青。
[0008] 所述溶剂可以是来自焦化的芳烃与煤油或轻柴油所组成的混合溶剂；也可以是重柴油；
[0009] 所述的来自焦化的芳烃可以是洗油、脱酚酚油；
[0010] 所述煤焦油软浙青的溶剂芳烃与煤油或轻柴油的质量比例为0.2~1.0: 1，溶剂与浙青的质量比为0.9~1.5: 1。
[0011] 所述中温煤浙青的溶剂芳烃与煤油或轻柴油的质量比例为0.3~1.5: 1，溶剂与浙青的质量比为1.0~2.0: I ；
[0012] 所述溶剂也可以是重柴油，重柴油与软浙青的质量比为0.9~1.5: 1，重柴油与中温浙青的质量比为1.0~2.0: I。
[0013] 本发明的方法是将中温煤浙青或煤焦油软浙青的原料与溶剂在80~95°C温度下溶解后再进行离心分离。该温度为现有连续化工业离心的正常工作温度，由于提高了操作温度，大大提高了溶剂对浙青的溶解能力，再通过离心分离技术，使QI颗粒的沉降速度可以达到重力沉降的3000倍以上，分离时间可以大大缩短，分离效率显著提高，并且许多靠沉降技术无法去除的小颗粒，通过离心方法能很好的脱除，使浙青的净化效果上了一个档次，更进一步降低了 QI含量；由于离心机的体积显著小于大型沉降或抽提设备，分离设备的体积也大幅缩小，即缩短了分离时间；采用混合常剂，使原生QI颗粒之间相互絮疑成大颗粒，从而加速沉降过程，显著提高了分离效果，避免了其后使用繁琐的过滤过程；采用更广泛的溶剂，不必采用单纯的脂肪烃、苯、喹啉等昂贵的溶剂，而采用像煤油、轻柴油类以烷烃为主的溶剂与相应的芳烃组合，即可达到很好的效果，净化后喹啉不溶物含量为0.01%。
[0014]由于采取上述技术方案使本发明技术与已有技术相比具有工艺简单，生产成本低，分离效率高，QI含量更低的优点及效果，净化之后的浙青完全满足制造针状焦、炭纤维等产品的需要。
具体实施方式
[0015] 下面实施例，对本发明加以进一步说明，但本发明不只限于这些实施例。
[0016] 实施例1
[0017] 将煤焦油软浙青150g和洗油56g、煤油94g在80°C温度下充分搅拌和混合，使浙青充分溶解，然后在4000r pm、8(TC温度下离心分离4min，尾弃残渣，所得滤液进行蒸馏，去除溶剂后，即可得到喹啉不溶物含量为0.01%的净化浙青。
[0018] 实施例2
[0019] 将煤焦油软浙青150g和洗油56g、煤油79g在85°C温度下充分搅拌和混合，使浙青充分溶解，然后在4000rpm、85°C温度下离心分离4min，尾弃残渣，所得滤液进行蒸馏，去除溶剂后，即可得到喹啉不溶物含量为0.01%的净化浙青。
[0020] 实施例3
[0021] 将焦油软浙青150g和洗油107g、煤油118g在90°C温度下充分搅拌和混合，使浙青充分溶解，然后在4000rpm、9(TC温度下离心分离4min，尾弃残渣，所得滤液进行蒸馏，去除溶剂后，即可得到喹啉不溶物含量为0.01%的净化浙青。
[0022] 实施例4
[0023] 将焦油软浙青150g和脱酚酚油112.5g、轻柴油112.5g在85°C温度下充分搅拌和混合，使浙青充分溶解，然后在4000rpm、85°C温度下离心分离4min，尾弃残渣，所得滤液进行蒸馏，去除溶剂后，即可得到喹啉不溶物含量为0.04%的净化浙青。
[0024] 实施例5
[0025] 将中温煤浙青150g和洗油75g、煤油75g在85°C温度下充分搅拌和混合，使浙青充分溶解，然后在4000rpm、85°C温度下离心分离4min，尾弃残渣，所得滤液进行蒸馏，去除溶剂后，即可得到喹啉不溶物含量为0.01%的净化浙青。[0026] 实施例6
[0027] 将中温煤浙青150g和洗油135g、煤油90g在80°C温度下充分搅拌和混合，使浙青充分溶解，然后在4000rpm、8(TC温度下离心分离4min，尾弃残渣，所得滤液进行蒸馏，去除溶剂后，即可得到喹啉不溶物含量为0.01%的净化浙青。
[0028] 实施例7
[0029] 将中温煤浙青100g和洗油89g、轻柴油Illg在90°C温度下充分搅拌和混合，使浙青充分溶解，然后在4000rpm、9(TC温度下离心分离4min，尾弃残渣，所得滤液进行蒸馏，去除溶剂后，即可得到喹啉不溶物含量为0.01%的净化浙青。
[0030] 实施例8
[0031] 将中温煤浙青200g和脱酚酚油135g、轻柴油90g在90°C温度下充分搅拌和混合，使浙青充分溶解，然后在4000rpm、9(TC温度下离心分离4min，尾弃残渣，所得滤液进行蒸馏，去除溶剂后，即可得到喹啉不溶物含量为0.04%的净化浙青。
[0032] 实施例9
[0033] 将焦油软浙青150g和洗油25g、煤油125g在95°C温度下充分搅拌和混合，使浙青充分溶解，然后在4000rpm、95°C温度下离心分离4min，尾弃残渣，所得滤液进行蒸馏，去除溶剂后，即可得到喹啉不溶物含量为0.02%的净化浙青。
[0034] 实施例10
[0035] 将中温煤浙青150g和洗油35g、煤油115g在95°C温度下充分搅拌和混合，使浙青充分溶解，然后在4000rpm、95°C温度下离心分离4min，尾弃残渣，所得滤液进行蒸馏，去除溶剂后，即可得到喹啉不溶物含量为0.02`%的净化浙青。
[0036] 实施例11
[0037] 将焦油软浙青150g和重柴油150g，在85°C温度下充分搅拌和混合，使浙青充分溶解，然后在4000rpm、85°C温度下离心分离4min，尾弃残渣，所得滤液进行蒸馏，去除溶剂后，即可得到喹啉不溶物含量为0.02%的净化浙青。
[0038] 实施例12
[0039] 将中温煤浙青150g和重柴油200g，在85°C温度下充分搅拌和混合，使浙青充分溶解，然后在4000rpm、85°C温度下离心分离4min，尾弃残渣，所得滤液进行蒸馏，去除溶剂后，即可得到喹啉不溶物含量为0.01%的净化浙青。
Claims (1)
1.一种煤浙青的净化方法，其特征在于它按下述步骤进行:以中温煤浙青或煤焦油软浙青为原料，将煤浙青原料与溶剂在80~95°C温度下充分搅拌和混合，使浙青充分溶解，然后在4000rpm，离心分离4min，浙青溶解后在80~95°C温度下进行离心分离，尾弃残渣，所得清液进行蒸馏，去除并回收溶剂后，得到喹啉不溶物含量为0.01~0.04%的净化浙青；所述溶剂是来自焦化的芳烃与煤油或轻柴油所组成的混合溶剂，或是重柴油；所述的来自焦化的芳烃是洗油、脱酚酚油；所述煤焦油软浙青的溶剂芳烃与煤油或轻柴油的质量比例为0.2~1.0: 1，溶剂与浙青的质量比为0.9~1.5: I ;所述中温煤浙青的溶剂芳烃与煤油或轻柴油的质量比例为0.3~1.5: 1，溶剂与浙青的质量比为1.0~2.0: I ;重柴油与软浙青的质量比 为0.9~1.5: 1，重柴油与中温煤浙青的质量比为1.0~2.0: I。
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| CN101928583A (zh) * | 2009-06-23 | 2010-12-29 | 上海宝钢化工有限公司 | 一种软沥青的净化方法 |
| CN102839008A (zh) * | 2011-06-24 | 2012-12-26 | 北京石油化工学院 | 一种煤焦油软沥青的净化方法 |
| CN102329637B (zh) * | 2011-08-29 | 2013-04-24 | 云南昆钢煤焦化有限公司 | 煤沥青针状焦的集约化生产方法 |
| CN102432306B (zh) * | 2011-08-29 | 2013-04-24 | 云南昆钢煤焦化有限公司 | 煤沥青针状焦集约化生产耐火材料粘结剂的方法 |
| CN103102165B (zh) * | 2011-08-29 | 2014-06-04 | 云南煤业能源股份有限公司 | 煤沥青针状焦集约化生产耐火材料的方法 |
| CN102311800B (zh) * | 2011-08-29 | 2013-04-24 | 云南昆钢煤焦化有限公司 | 一种煤沥青针状焦副产油的改性方法 |
| CN103087745B (zh) * | 2011-11-01 | 2015-09-02 | 北京宝塔三聚能源科技有限公司 | 一种利用煤焦油结合重相循环制备针状焦原料的工艺 |
| CN103205272B (zh) * | 2012-01-12 | 2017-03-01 | 易高环保能源研究院有限公司 | 高温煤焦油生产净化煤焦油沥青的方法 |
| CN102757234B (zh) * | 2012-07-30 | 2014-04-23 | 昆明冶金研究院 | 一种高纯二氧化硅的压制、烧结方法 |
| CN103113910B (zh) * | 2013-01-30 | 2014-07-02 | 陕西煤业化工技术研究院有限责任公司 | 一种煤系针状焦的原料预处理方法 |
| CN103173235B (zh) * | 2013-03-27 | 2014-06-18 | 天津大学 | 沥青中喹啉不溶物的低能耗脱除方法 |
| CN103965928B (zh) * | 2014-04-30 | 2016-04-13 | 上海宝聚新化能源科技有限公司 | 一种煤-油系混合沥青的焦化方法 |
| CN106190211A (zh) * | 2016-08-31 | 2016-12-07 | 山东晨阳新型碳材料股份有限公司 | 一种制备高纯度浸渍剂沥青的方法 |
| CN111218294A (zh) * | 2018-11-27 | 2020-06-02 | 宝武炭材料科技有限公司 | 一种高软化点高喹啉不溶物煤系沥青的净化方法 |
| CN110410679A (zh) * | 2019-07-15 | 2019-11-05 | 无锡必创传感科技有限公司 | 一种煤油感应光纤和煤油泄漏监测系统 |
| CN110317624A (zh) * | 2019-08-08 | 2019-10-11 | 平顶山东晟高科实业有限公司 | 一种沥青脱除qi的方法 |
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