CN110152593A - 一种改性凹凸棒土吸附剂及其制备方法 - Google Patents

一种改性凹凸棒土吸附剂及其制备方法 Download PDF

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CN110152593A
CN110152593A CN201910428732.3A CN201910428732A CN110152593A CN 110152593 A CN110152593 A CN 110152593A CN 201910428732 A CN201910428732 A CN 201910428732A CN 110152593 A CN110152593 A CN 110152593A
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attapulgite
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窦鹏
吕佳
孙雄
李亚龙
车美美
黄燕
庞慧
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Jiangsu Fangtian Power Technology Co Ltd
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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Abstract

本发明涉及一种改性凹凸棒土吸附剂及其制备方法，包括以下步骤：将凹凸棒土和氢氧化钙按重量百分比混合磨匀，煅烧，制成吸附剂半成品；按原料配比加入一定量的硅酸钠，在100℃的水浴下搅拌，再于室温下静止活化；将所得的吸附剂半成品进行过滤，放入烘箱内干燥，得到改性凹凸棒土颗粒；将所得的改性凹凸棒土颗粒进行筛选，筛选出长度约0.5‑2.5mm，直径约0.8‑1.2mm的改性凹凸棒土吸附剂。本发明制成的改性凹凸棒土吸附剂有更大的比表面积、孔体积和孔径，呈有规则的颗粒状，且具有较好的聚合强度且稳定性高。

Description

一种改性凹凸棒土吸附剂及其制备方法
技术领域
本发明涉及一种矿物材料吸附剂，具体涉及一种改性凹凸棒土吸附剂及其制备方法。
背景技术
随着电力工业的发展，电力用油的需求不断增加，而处于一定温度、大气和电磁场的运行条件下的电力用油不可避免地会发生劣化。劣化的电力用油有效成份一般较高，把它倒掉或降级使用是不经济的。对劣化的电力用油的再生是一项有效的节约措施，能产生显著的经济效益，并能保护环境。利用高效吸附剂再生劣化的电力用油，不仅油耗小、工艺简单，而且再生油质量接近新油，为企业节约大笔的生产成本开支，为国家节省宝贵的石油资源，并且保护了自然环境。现有技术中比较常见的处理方法是采用H2SO4-白土法、酸-碱-白土法对变压器油进行吸附，但主要存在以下缺陷：处理过程中用到酸、碱等液体化学材料，对操作员来说存在着潜在安全隐患，而且会产生一些酸渣和碱渣，无法处理和利用，对环境造成了较大的压力。也有用吸附剂再生劣化电力用油的，如“2008101975465”发明专利所述的《一种处理变压器废油的吸附剂及其生产方法》生产的劣化油吸附剂，不仅生产工艺简单，无环境污染，而且对劣化油处理效果很好。但此类劣化油吸附剂，形状为不规则块状，坚硬度较差，在处理完劣化油后，易破碎成粉末状，不能继续使用而只得废弃，不仅造成浪费，而且还污染环境。
凹土(简称ATP)，是一种晶质水合镁铝硅酸盐矿物，其独特的晶体结构使其具有离子可交换性、吸水性、吸附脱色性、干燥后收缩小、不大显裂纹、悬浮液遇电介质不絮凝沉淀的特性，不仅能提高原来劣化油吸附剂对劣化油吸附处理的功能和效果，还可使吸附剂使用后不会变形破碎，可继续使用。提高了生产效率。节约了生产成本，减少了环境污染。其吸附能力受到限制的原因主要体现在以下两点：一是，当油中水分和有机污染物在凹土表面竞争吸附时，水分子被优先吸附，占据了凹土孔道表面的活性吸附位点，使其对有机污染物去除率降低；二是，凹土表面能高，导致其极易聚集成团，比表面积有所减小。因此，需要对凹土进行改性，提高凹土对劣化油吸附处理能力。
发明内容
本发明的目的是提供一种改性凹凸棒土吸附剂及其制备方法，使其制成的改性凹凸棒土吸附剂有更大的比表面积、孔体积和孔径，呈有规则的颗粒状，且具有较好的聚合强度且稳定性高。
为实现上述目的，本发明提供的技术方案是：
一种改性凹凸棒土吸附剂，其制备方法包括以下步骤：
步骤1)：煅烧
将凹凸棒土和氢氧化钙按重量百分比混合磨匀，煅烧，制成吸附剂半成品；
步骤2)：改性活化
向步骤1)所得的吸附剂半成品中按原料配比加入一定量的硅酸钠，在100℃的水浴下搅拌，再于室温下静止活化；
步骤3)：干燥
将步骤2)所得的吸附剂半成品进行过滤，放入烘箱内干燥，得到改性凹凸棒土颗粒；
步骤4)：筛选
将步骤3)所得的改性凹凸棒土颗粒进行筛选，筛选出长度约0.5-2.5mm，直径约0.8-1.2mm的改性凹凸棒土吸附剂。
按重量百分比数计，所述吸附剂的原料如下：凹凸棒土60％-70％，氢氧化钙10％-20％，硅酸钠10％-20％。
步骤1)中，煅烧为置于850℃马弗炉中煅烧2-3小时。
步骤2)中，加入一定量的硅酸钠后在100℃的水浴下搅拌3小时，再于室温下静止活化3小时。
步骤3)中，吸附剂半成品过滤后，放入100℃烘箱内干燥2小时。
步骤4)中，筛选为采用网孔为0.8-1.2mm的筛网筛选凹凸棒土吸附剂。
与现有技术相比，本发明的有益效果是：
1、本发明以凹凸棒土作为原料，价格低廉，原料获取方便，通过该工艺生产得到的改性凹凸棒土吸附剂有更大的比表面积、孔体积和孔径，呈有规则的颗粒状，且具有较好的聚合强度且稳定性高。
2、该改性凹凸棒土吸附剂通过煅烧，使其固结，具有一定的聚合强度，且稳定性高，避免该吸附剂颗粒破碎。
附图说明
图1：未改性的凹凸棒土和本发明实施例1得到改性凹凸棒土吸附剂的XRD图谱。
图2：未改性的凹凸棒土和本发明实施例1得到改性凹凸棒土吸附剂的FTIR图谱。
具体实施方式
下面结合具体实施例对本发明作进一步说明。
实施例1
步骤1：称取60克凹凸棒土，20克氢氧化钙，混合磨匀，将凹凸棒土和氢氧化钙按百分比混合磨匀，置于850℃马弗炉中煅烧2-3小时，制成吸附剂半成品；
步骤2：向步骤1所得的吸附剂半成品中加入20克硅酸钠，在100℃的水浴下搅拌3小时，再于室温下静止活化3小时。
步骤3：将步骤2所得的吸附剂半成品进行过滤，放入100℃烘箱内干燥2小时，筛选出长度约0.5-2.5mm，直径约0.8-1.2mm的改性凹凸棒土颗粒，得到改性凹凸棒土吸附剂。
实施例2
步骤1：称取70克凹凸棒土，20克氢氧化钙，混合磨匀，将凹凸棒土和氢氧化钙按百分比混合磨匀，置于850℃马弗炉中煅烧2-3小时，制成吸附剂半成品；
步骤2：向步骤1所得的吸附剂半成品中加入10克硅酸钠，在100℃的水浴下搅拌3小时，再于室温下静止活化3小时。
步骤3：将步骤2所得的吸附剂半成品进行过滤，放入100℃烘箱内干燥2小时，筛选出长度约0.5-2.5mm，直径约0.8-1.2mm的改性凹凸棒土颗粒，得到改性凹凸棒土吸附剂。
实施例3
步骤1：称取70克凹凸棒土，10克氢氧化钙，混合磨匀，将凹凸棒土和氢氧化钙按百分比混合磨匀，置于850℃马弗炉中煅烧2-3小时，制成吸附剂半成品；
步骤2：向步骤1所得的吸附剂半成品中加入20克硅酸钠，在100℃的水浴下搅拌3小时，再于室温下静止活化3小时。
步骤3：将步骤2所得的吸附剂半成品进行过滤，放入100℃烘箱内干燥2小时，筛选出长度约0.5-2.5mm，直径约0.8-1.2mm的改性凹凸棒土颗粒，得到改性凹凸棒土吸附剂。
以上所述，仅是本发明的较佳实施例，并非对本发明作任何形式上的限制，任何熟悉本专业的技术人员，在不脱离本发明技术方案范围内，依据本发明的技术实质，对以上实施例所作的任何简单的修改、等同替换与改进等，均仍属于本发明技术方案的保护范围之内。

Claims (6)

1.一种改性凹凸棒土吸附剂，其特征在于：其制备方法包括以下步骤：
步骤1)：煅烧
将凹凸棒土和氢氧化钙按重量百分比混合磨匀，煅烧，制成吸附剂半成品；
步骤2)：改性活化
向步骤1)所得的吸附剂半成品中按原料配比加入一定量的硅酸钠，在100℃的水浴下搅拌，再于室温下静止活化；
步骤3)：干燥
将步骤2)所得的吸附剂半成品进行过滤，放入烘箱内干燥，得到改性凹凸棒土颗粒；
步骤4)：筛选
将步骤3)所得的改性凹凸棒土颗粒进行筛选，筛选出直径约0.8-1.2mm的改性凹凸棒土吸附剂。
2.根据权利要求1所述的改性凹凸棒土吸附剂，其特征在于：按重量百分比数计，所述吸附剂的原料如下：凹凸棒土60％-70％，氢氧化钙10％-20％，硅酸钠10％-20％。
3.根据权利要求1所述的改性凹凸棒土吸附剂，其特征在于：步骤1)中，煅烧为置于850℃马弗炉中煅烧2-3小时。
4.根据权利要求1所述的改性凹凸棒土吸附剂，其特征在于：步骤2)中，加入一定量的硅酸钠后在100℃的水浴下搅拌3小时，再于室温下静止活化3小时。
5.根据权利要求1所述的改性凹凸棒土吸附剂，其特征在于：步骤3)中，吸附剂半成品过滤后，放入100℃烘箱内干燥2小时。
6.根据权利要求1所述的改性凹凸棒土吸附剂，其特征在于：步骤4)中，筛选为采用网孔为0.8-1.2mm的筛网筛选凹凸棒土吸附剂。
CN201910428732.3A 2019-05-22 2019-05-22 一种改性凹凸棒土吸附剂及其制备方法 Pending CN110152593A (zh)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
CN103357376A (zh) * 2013-07-18 2013-10-23 淮阴工学院 纳米凹土基材常温so2吸附剂的制备方法
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CN103357376A (zh) * 2013-07-18 2013-10-23 淮阴工学院 纳米凹土基材常温so2吸附剂的制备方法
WO2016075233A1 (de) * 2014-11-12 2016-05-19 H. V. Gimborn Gmbh Sorptionsmittel in granulatform mit einer mischung aus drei verschiedenen tonmaterialien
CN104785202A (zh) * 2015-04-21 2015-07-22 南京林业大学 一种改性凹凸棒土吸附剂的制备方法
CN106943989A (zh) * 2017-04-12 2017-07-14 明光市国星凹土有限公司 一种用于凹凸棒土改性的酸碱结合法

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Application publication date: 20190823