CN110090616A - 一种低温液体吸附除水材料的制备 - Google Patents

一种低温液体吸附除水材料的制备 Download PDF

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Publication number
CN110090616A
CN110090616A CN201810087622.0A CN201810087622A CN110090616A CN 110090616 A CN110090616 A CN 110090616A CN 201810087622 A CN201810087622 A CN 201810087622A CN 110090616 A CN110090616 A CN 110090616A
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Prior art keywords
water removal
liquid nitrogen
preparation
cryogenic liquid
water content
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Inventor
苏佳丽
刘玉涛
刘海生
梁怀喜
赵耀中
苏嘉南
余炳延
骆明强
朱晓彤
陈静
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Beijing Institute of Aerospace Testing Technology
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Beijing Institute of Aerospace Testing Technology
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Priority to CN201810087622.0A priority Critical patent/CN110090616A/zh
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Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
    • B01D15/08—Selective adsorption, e.g. chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28009—Magnetic properties

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

本发明是一种液氮除水材料，具有对成品液氮净化的功能。本材料由硅铝胶和磁粉混合而成，净化时将材料装入固定床吸附器，将液氮以一定压力通过吸附器，经过循环后低温液氮的含水量将低于0.5ppm，达到使用要求。本发明在航空航天领域将起到重要的作用。

Description

一种低温液体吸附除水材料的制备
技术领域
本发明属于吸附技术领域，涉及到低温液体(如液氮、液氧等) 除水吸附材料。
背景技术
吸附除水材料是一种化工行业的常用材料。是将气体或液体中的杂质通过吸附方式去除的一种材料。
低温液体中的含水量是衡量其质量的一项重要指标。若含水量超标会严重影响其使用。一般来说，液氮制备过程中，即空气液化的过程即会在气态时除掉空气中所含的水分，液氮经空分制备出厂前，其含水量最高可达到一定的标准。目前，国家要求的纯氮含水量要求 15ppm(10-6摩尔分数)以下，高纯氮含水量要求为3ppm以下，超纯氮含水量要求0.5ppm以下。但制备高纯氮及超纯氮的设备要求极为苛刻，其成本也较高。
另一方面，液氮在出厂到使用前，会经过转注、储存、储运等一系列操作，由于管壁的浓差扩散效应，不可避免会有一定的水污染，因而在使用前液氮的含水量又有一定的增加。而目前有许多使用场合要求液氮的含水量达到0.5ppm甚至更低，这就要求在液氮出厂后为成品液氮进一步除水。
传统的吸附剂都是为气体除去水分，且其吸附深度达不到所需的0.5ppm的要求。因此需要改善吸附剂和吸附质之间的作用力，提高其吸附势，从而将液氮中含水量降到所需的程度。
本发明的主要有以下优点：(1)可以为成品低温液体除水；(2) 可以将低温液体含水量降低到0.5ppm以下，以满足一些极端条件下的使用要求。
发明内容
本发明是一种低温液体除水吸附剂，其目的是为对含水量有较高要求的低温液体除水，从而达到使用要求。
本发明目的的技术解决方案为：将吸附剂(硅铝胶)与磁粉均匀混合(其重量比为1∶1)，使用固定床吸附器装填，使低温液体以一定压力通过吸附器，如此经过吸附器循环后，所得的低温液体其含水量少于0.5ppm。
附图说明
图1为本发明的液氮除水结果数据图，图中蓝色为未除水液氮含水量，红色为使用本发明吸附剂除水后的液氮含水量。
测量时，由于管路及液氮本身的污染，随着吹除时间的增加液氮测得含水量不断降低，但降低到接近1ppm时，再吹除其含水量结果将不会继续下降。而经过除水后，随着时间的推移其含水量将降到 0.5ppm以下。
具体实施方式
具体实施案例1：以下对本发明进一步说明。
本发明的液氮除水材料主要由硅铝胶、磁粉组成。将硅铝胶和磁粉以重量比1∶1的比例混合均匀，在真空干燥箱中150℃烘干24小时，装填在固定床吸附器内，装填时应尽量在干燥环境并在开启吸附器前保持吸附器两端口封闭。装好设备后开启吸附器，使液氮以一定压力通过吸附器内，经过几小时循环，其含水量将降到0.5ppm以下。循环时间根据液氮量及吸附剂量调整。

Claims (4)

1.一种用于低温液体除水的吸附材料的制备方法，主要由磁粉和硅铝胶组成。
2.根据权利要求1所述的一种低温液体除水的吸附材料的制备方法，其特征在于：将硅铝胶和磁粉以重量比1∶1混合，搅拌均匀后放入吸附器使用。
3.根据权利要求1所述的一种低温液体除水的吸附材料的制备方法，其特征在于：混合吸附材料在使用前须经过真空干燥，温度150℃时间24小时以上。
4.根据权利要求1所述的一种低温液体除水的吸附材料的制备方法，其特征在于：将权利要求1和2所述制得的磁性硅铝胶作为吸附剂，吸附液氮中的水分，其最终含水量可达到0.5ppm以下。
CN201810087622.0A 2018-01-30 2018-01-30 一种低温液体吸附除水材料的制备 Pending CN110090616A (zh)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0579754A (ja) * 1991-09-20 1993-03-30 Hitachi Ltd 高純度窒素の製造装置
JPH06205971A (ja) * 1992-08-21 1994-07-26 Praxair Technol Inc 気体精製方法及びシステム
CN1125191A (zh) * 1993-12-31 1996-06-26 乔治.克劳德方法和研究开发空气股份有限公司 制备高纯液氮的方法和设备
JPH08173748A (ja) * 1994-12-26 1996-07-09 Japan Pionics Co Ltd 不活性ガスの精製方法および装置
CN1171534A (zh) * 1996-06-07 1998-01-28 液体空气乔治洛德方法利用和研究有限公司 高纯液态低温流体的制备方法与装置
CN1330970A (zh) * 2000-06-29 2002-01-16 波克股份有限公司 气体的纯化
CN1467014A (zh) * 2002-05-31 2004-01-14 �����Ʒ�뻯ѧ��˾ 使用复合吸附剂的气流纯化

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0579754A (ja) * 1991-09-20 1993-03-30 Hitachi Ltd 高純度窒素の製造装置
JPH06205971A (ja) * 1992-08-21 1994-07-26 Praxair Technol Inc 気体精製方法及びシステム
CN1125191A (zh) * 1993-12-31 1996-06-26 乔治.克劳德方法和研究开发空气股份有限公司 制备高纯液氮的方法和设备
JPH08173748A (ja) * 1994-12-26 1996-07-09 Japan Pionics Co Ltd 不活性ガスの精製方法および装置
CN1171534A (zh) * 1996-06-07 1998-01-28 液体空气乔治洛德方法利用和研究有限公司 高纯液态低温流体的制备方法与装置
CN1330970A (zh) * 2000-06-29 2002-01-16 波克股份有限公司 气体的纯化
CN1467014A (zh) * 2002-05-31 2004-01-14 �����Ʒ�뻯ѧ��˾ 使用复合吸附剂的气流纯化

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
聂百胜等: "磁化水在煤层注水中的应用", 《辽宁工程技术大学学报》 *
苏佳丽: "极低露点液氮获得技术研究", 《中国硕士学位论文全文数据库 工程科技Ⅰ辑》 *

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