CN105561915A - 一种新型除湿剂及其制作方法 - Google Patents
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Abstract
本发明公开了一种新型除湿剂及其制作方法,该除湿剂由具有多孔结构的吸附剂和填充于吸附剂孔洞结构内的吸湿性盐组成,吸湿性盐与吸附剂的质量比为0.3~3:1,这使得该除湿剂即具有吸湿性盐类除湿剂的优点,包括吸湿能力强、吸湿速率块、吸湿容量大、解析温度低等,同时又和非潮解除湿剂一样不发生潮解,没有潮解除湿剂的缺点。
Description
技术领域
本发明涉及一种新型除湿剂及其制作方法。
背景技术
常规的除湿剂,分为两种,一种为非潮解除湿剂,包括硅胶、分子筛等,另一种为潮解除湿剂,如吸湿性盐,包括氯化钙、氯化锂。
非潮解除湿剂,其吸湿机理为物理吸附,由于其具有大的比表面且含有大量的微孔的毛细吸附作用产生对水分的吸附,其主要缺点是吸湿能力弱、吸湿速率慢、吸湿容量小、解析温度高等,其主要优点是没有液体产生,便于使用。
而潮解除湿剂,如吸湿性盐,包括氯化钙、氯化锂。其主要机理是化学吸收。其主要优点是吸湿能力强、吸湿速率块、吸湿容量大、解析温度低等,其主要缺点是产生液体,不便于使用,大部分盐还有强腐蚀性,极大的限制了其应用。
发明内容
本发明提供一种新型除湿剂,其具有吸湿性盐类除湿剂的优点,包括吸湿能力强、吸湿速率块、吸湿容量大、解析温度低等,同时又和非潮解除湿剂一样不发生潮解,没有潮解除湿剂的缺点。本发明同时提供了一种新型除湿剂的制作方法。
本发明的目的是通过以下技术方案实现的:一种新型除湿剂,该除湿剂由具有多孔结构的吸附剂和填充于吸附剂孔洞结构内的吸湿性盐组成,吸湿性盐与吸附剂的质量比为0.3~3:1;
进一步地,所述吸附剂的孔径为
进一步地,所述吸湿性盐选自氯化钙、氯化锂、溴化锂、甲酸钾等。
进一步地,所述吸湿性盐为甲酸钾。
进一步地,所述吸附剂选自硅胶、分子筛、蛭石等。
进一步地,所述的吸附剂的粒径小于500μm,或大于1mm。
进一步地,所述的吸湿性盐为甲酸钾,吸附剂为硅胶,甲酸钾与硅胶的质量比例为1~1.5:1。
一种新型除湿剂的制作方法,将吸湿性盐用溶剂调制成盐溶液,然后加入吸附剂,盐溶液被吸附剂吸附,使得吸附后的吸附剂中,吸湿性盐与吸附剂的质量比为0.3~3:1;然后,通过热处理将溶剂去除,得到新型除湿剂。
本发明利用盐类除湿剂的特性吸收空气中的水分进行除湿,同时利用吸附剂含有丰富的微孔结构,具有高表面积的特征吸附盐类物质,吸湿性盐用于吸收空气中的水分进行除湿,吸湿性盐吸收水分后,形成盐溶液;吸附剂用于吸附盐溶液。通过盐与吸附剂混合比例的调节,保证高效除湿的同时,避免液体产生的危险。
具体实施方式
本发明一种除湿剂,由具有多孔结构的吸附剂和填充于吸附剂孔洞结构内的吸湿性盐组成,其中,吸附剂含有丰富的微孔结构,具有高表面积,包括硅胶、分子筛及蛭石等,盐为具有吸湿功能的盐类物质,包括氯化钙、氯化锂、溴化锂及甲酸钾等,吸湿性盐与吸附剂的质量比为0.3~3:1;其中的吸湿性盐用于吸收空气中的水分进行除湿,吸湿性盐吸收水分后,形成盐溶液;吸附剂用于吸附盐溶液。
吸附剂可以为粉剂,其大小一般小于500μm,可用于制作成涂层;或为颗粒,其大小一般大于1mm。当吸附剂的粒径在500μm~1mm之间时,不利于制备涂层,且大量堆积时,由于尺寸较小,不利于气体流通。
本发明的新型除湿剂优先采用盐为甲酸钾,甲酸钾与其它吸湿性盐相比,其最大的优点是无腐蚀性。无腐蚀性的好处,一是方便改新型除湿剂的加工制作,如加工制作所用的设备无需防腐蚀等,其二是,该新型除湿剂无潜在腐蚀的危险,即使该新型除湿剂如大量液态水接触,产生甲酸钾溶液,也没有腐蚀性。而如果采用其它腐蚀性盐,如氯化钙等,当大量液态水与该新型除湿剂接触,导致吸附剂微孔中的盐溶解产生腐蚀性氯化钙溶液。
除湿剂的制备为:将吸湿性盐用溶剂调制成盐溶液,然后加入吸附剂,盐溶液被吸附剂吸附,使得吸附后的吸附剂中;然后,通过热处理将溶剂去除,得到新型除湿剂。溶剂可以为水、乙醇、丙酮等常用溶剂,盐溶液的浓度可以为任意浓度,只要确保热处理去除溶剂后,吸湿性盐与吸附剂的质量比为0.3~3:1。
下面结合实施例对本发明作进一步说明。
实施例1:配制不同浓度的甲酸钾水溶液5ml(详见表1),然后加入10g硅胶,甲酸钾水溶液完全被硅胶吸附;然后,通过热处理将水分去除,得到除湿剂薄层A~J如下,将其置于相对湿度60%,温度26度的环境中24小时,使其吸湿达到平衡,然后比较吸湿前后的重量,到的吸湿量。
表1
甲酸钾(g) | 1 | 2 | 3 | 8 | 10 | 15 | 24 | 30 | 33 | 36 |
产物 | A | B | C | D | E | F | G | H | I | J |
吸湿量(g) | 0.2 | 0.3 | 1.0 | 2.0 | 2.5 | 3.0 | 3.6 | 4.5 | 5.0 | 5.2 |
甲酸钾含量过低时,吸湿效果不明显,3g‐36g内,吸湿效果均大于1g,甲酸钾量越大,吸湿量越大,但甲酸钾质量超过30g后,由于吸水量过大,吸附剂不能完全吸收甲酸钾水解后形成的盐溶液,除湿剂薄层表面有液体产生,因此甲酸钾含量不宜超过30g,即,不能大于300%;从工业生产考虑,甲酸钾量最好控制在10g‐15g,不仅能保证高效的吸湿量,且没有液体产生的危险,是本发明最佳范围。
达到吸湿饱和后,可以通过热处理将水分去除,实现除湿剂的重复利用。
本发明的新型除湿剂可以广泛应用于各种需要除湿和干燥的场合,如代替常用的硅胶干燥剂等,其新型除湿剂颗粒可以代替硅胶或者分子筛颗粒,用于各种工业、建筑的除湿场合,也可以用于吸附式制冷。其新型除湿剂粉剂可以用来制作除湿涂层,包括全热交换器的表面处理、除湿换热器表面处理、及防止凝结水产生的表面处理等。
Claims (8)
1.一种新型除湿剂,其特征在于,该除湿剂由具有多孔结构的吸附剂和填充于吸附剂孔洞结构内的吸湿性盐组成,吸湿性盐与吸附剂的质量比为0.3~3:1。
2.根据权利要求1所述的新型除湿剂,其特征在于,所述吸附剂的孔径为
3.根据权利要求1所述的除湿剂,其特征在于,所述吸湿性盐选自氯化钙、氯化锂、溴化锂、甲酸钾等。
4.根据权利要求3所述的除湿剂,其特征在于,所述吸湿性盐为甲酸钾。
5.根据权利要求1所述的除湿剂,其特征在于,所述吸附剂选自硅胶、分子筛、蛭石等。
6.根据权利要求1所述的新型除湿剂,其特征在于,所述的吸附剂的粒径小于500μm,或大于1mm。
7.根据权利要求1所述的新型除湿剂,其特征在于,所述的吸湿性盐为甲酸钾,吸附剂为硅胶,甲酸钾与硅胶的质量比例为1~1.5:1。
8.一种新型除湿剂的制作方法,其特征在于,将吸湿性盐用溶剂调制成盐溶液,然后加入吸附剂,盐溶液被吸附剂吸附,使得吸附后的吸附剂中,吸湿性盐与吸附剂的质量比为0.3~3:1;然后,通过热处理将溶剂去除,得到新型除湿剂。
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Cited By (8)
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CN105953632A (zh) * | 2016-05-12 | 2016-09-21 | 上海交通大学 | 热质弱耦合吸附剂涂层及使用该吸附剂涂层的换热器 |
CN106345242A (zh) * | 2016-10-28 | 2017-01-25 | 广西大学 | 用于除去空气中水分的除湿剂及其制备方法 |
CN107537290A (zh) * | 2017-10-16 | 2018-01-05 | 王金华 | 一种复合除湿剂的制备方法 |
CN110523372A (zh) * | 2019-08-27 | 2019-12-03 | 无锡普爱德环保科技有限公司 | 一种用于提高空气除湿性能的除湿剂及其制作方法 |
CN110918119A (zh) * | 2019-11-01 | 2020-03-27 | 天津科技大学 | 一种高吸湿性轻质多孔微粒暖云雾催化剂 |
CN108144575B (zh) * | 2018-01-12 | 2021-03-30 | 浙江理工大学 | 硫化石墨硅胶氯化锂固化复合除湿剂及其制备方法 |
CN112663726A (zh) * | 2020-12-21 | 2021-04-16 | 上海海事大学 | 一种高取水量、防回流的太阳能吸附式空气取水装置 |
CN114234302A (zh) * | 2021-12-24 | 2022-03-25 | 珠海格莱克科技有限公司 | 一种稳定除湿机组送风湿度的方法及装置 |
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CN110523372A (zh) * | 2019-08-27 | 2019-12-03 | 无锡普爱德环保科技有限公司 | 一种用于提高空气除湿性能的除湿剂及其制作方法 |
CN110918119A (zh) * | 2019-11-01 | 2020-03-27 | 天津科技大学 | 一种高吸湿性轻质多孔微粒暖云雾催化剂 |
CN110918119B (zh) * | 2019-11-01 | 2022-07-19 | 天津科技大学 | 一种高吸湿性轻质多孔微粒暖云雾催化剂 |
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