JP2012193074A5 - - Google Patents

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Publication number
JP2012193074A5
JP2012193074A5 JP2011058559A JP2011058559A JP2012193074A5 JP 2012193074 A5 JP2012193074 A5 JP 2012193074A5 JP 2011058559 A JP2011058559 A JP 2011058559A JP 2011058559 A JP2011058559 A JP 2011058559A JP 2012193074 A5 JP2012193074 A5 JP 2012193074A5
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JP
Japan
Prior art keywords
solid
solution
mixture
separation
hydrogen fluoride
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JP2011058559A
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Japanese (ja)
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JP2012193074A (en
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Priority to JP2011058559A priority Critical patent/JP2012193074A/en
Priority claimed from JP2011058559A external-priority patent/JP2012193074A/en
Priority to CN2012100659575A priority patent/CN102674397A/en
Priority to TW101108531A priority patent/TW201238899A/en
Publication of JP2012193074A publication Critical patent/JP2012193074A/en
Publication of JP2012193074A5 publication Critical patent/JP2012193074A5/ja
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Description

［適用例２］
本発明の分離方法では、前記第１の晶析工程では、前記第１の溶液を、３０〜６０℃にすることが好ましい。
これにより、第２の固体として、より高純度のフッ化水素アンモニウムを分離・回収することができる。 [Application Example 2]
The separation method of the present invention, the as in the first crystallization step, the first solution, to Rukoto preferably to 30 to 60 ° C..
Thereby, higher-purity ammonium hydrogen fluoride can be separated and recovered as the second solid.

［適用例３］
本発明の分離方法では、前記第２の晶析工程では、前記第２の溶液を、５〜２０℃にすることが好ましい。
これにより、第２の固体として、より高純度のフッ化水素アンモニウムを分離・回収することができる。 [Application Example 3]
The separation method of the present invention, the higher in the second crystallization step, the second solution, to Rukoto preferably to 5 to 20 ° C..
Thereby, higher-purity ammonium hydrogen fluoride can be separated and recovered as the second solid.

Claims (6)

フッ化水素アンモニウムと珪素化合物とを含有する固形状の混合物から、前記フッ化水素アンモニウムを分離する分離方法であって、
前記混合物を溶媒に溶解してなる第１の溶液を得る準備工程と、
前記第１の溶液を冷却し、晶析を行うことにより、前記珪素化合物を前記混合物よりも多く含む固形状の第１の固体を析出させ、前記第１の溶液から前記第１の固体と第２の溶液とに分離する第１の晶析工程と、
前記第２の溶液を前記第１の晶析工程よりも低い温度に冷却し、晶析を行うことにより、前記混合物よりも前記フッ化水素アンモニウムの含有率が高い第２の固体を析出させ、前記第２の溶液から前記第２の固体を分離する第２の晶析工程と、
を有することを特徴とする分離方法。 A separation method for separating the ammonium hydrogen fluoride from a solid mixture containing ammonium hydrogen fluoride and a silicon compound,
A preparation step of obtaining a first solution obtained by dissolving the mixture in a solvent;
By cooling the first solution and performing crystallization, a solid first solid containing more of the silicon compound than the mixture is precipitated, and the first solid and the first solid are separated from the first solution. A first crystallization step that separates into two solutions;
By cooling the second solution to a temperature lower than that of the first crystallization step and performing crystallization, the second solid having a higher content of ammonium hydrogen fluoride than the mixture is precipitated, A second crystallization step of separating the second solid from the second solution;
A separation method characterized by comprising: 前記第１の晶析工程では、前記第１の溶液を、３０〜６０℃にする請求項１に記載の分離方法。 Wherein as the first crystallization step, the first solution, the method of separation according to claim 1 you to 30 to 60 ° C.. 前記第２の晶析工程では、前記第２の溶液を、５〜２０℃にする請求項１または２に記載の分離方法。 Wherein as in the second crystallization step, separation methods, wherein the second solution, to claim 1 or 2 you to 5 to 20 ° C.. 前記準備工程では、前記溶媒と前記混合物とを加熱しながら溶解させる請求項１ないし３のいずれかに記載の分離方法。   The separation method according to claim 1, wherein in the preparation step, the solvent and the mixture are dissolved while heating. 乾燥した前記第２の固体における前記フッ化水素アンモニウムの含有率は、９５ｗｔ％以上である請求項１ないし４のいずれかに記載の分離方法。   The separation method according to any one of claims 1 to 4, wherein a content of the ammonium hydrogen fluoride in the dried second solid is 95 wt% or more. 請求項１ないし５のいずれかに記載の分離方法を備えることを特徴とする分離装置。   A separation apparatus comprising the separation method according to claim 1.
JP2011058559A 2011-03-16 2011-03-16 Separation method and separation apparatus Withdrawn JP2012193074A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2011058559A JP2012193074A (en) 2011-03-16 2011-03-16 Separation method and separation apparatus
CN2012100659575A CN102674397A (en) 2011-03-16 2012-03-13 Separation method and separation device
TW101108531A TW201238899A (en) 2011-03-16 2012-03-13 Separation method and separation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011058559A JP2012193074A (en) 2011-03-16 2011-03-16 Separation method and separation apparatus

Publications (2)

Publication Number Publication Date
JP2012193074A JP2012193074A (en) 2012-10-11
JP2012193074A5 true JP2012193074A5 (en) 2014-04-10

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JP2011058559A Withdrawn JP2012193074A (en) 2011-03-16 2011-03-16 Separation method and separation apparatus

Country Status (3)

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JP (1) JP2012193074A (en)
CN (1) CN102674397A (en)
TW (1) TW201238899A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103566606B (en) * 2013-11-04 2015-03-04 中国地质大学（武汉） Multifunctional purification device and method for purifying ammonium bifluoride by using same
CN113045089B (en) * 2021-03-15 2023-04-18 盛隆资源再生（无锡）有限公司 Method for refining and purifying etching waste liquid

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1021831B (en) * 1956-10-25 1958-01-02 Wasagchemie Ag Process for the production of pure crystallized ammonium bifluoride from fluosilicic acid and ammonia
US3106449A (en) * 1961-07-17 1963-10-08 Grace W R & Co Production of ammonium hydrogen fluoride
US3705007A (en) * 1970-08-25 1972-12-05 Allied Chem Process for the preparation of ammonium bifluoride from ammonium fluoride
JPS539585B2 (en) * 1974-03-23 1978-04-06
JPS5337599A (en) * 1976-09-20 1978-04-06 Hitachi Zosen Corp Recovering method for fluorine in wet-process phosphoric acid production
US4981664A (en) * 1988-04-14 1991-01-01 International Minerals & Chemical Corporation Method of production of high purity silica and ammonium fluoride
JP2852355B2 (en) * 1989-06-26 1999-02-03 ステラケミファ株式会社 Fine processing surface treatment agent
JPH03218914A (en) * 1989-11-16 1991-09-26 Nissan Chem Ind Ltd Production of high purity silica and ammonium fluorosilicate
US5028407A (en) * 1990-01-25 1991-07-02 International Minerals & Chemical Corp. Method of production of high purity fusible silica
JPH03265514A (en) * 1990-01-26 1991-11-26 Kawasaki Steel Corp Method for treatment of etching waste liquid containing fluorine compd.
CN101066767B (en) * 2007-05-25 2010-08-25 浙江三美化工股份有限公司 Improved wet process for producing ammonium bifluoride
CN101898769B (en) * 2010-02-11 2011-12-28 多氟多化工股份有限公司 Method for producing high-purity ammonium bifluoride

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