SU28281A1 - Method for demineralization of gypsum-containing tannid solutions - Google Patents

Method for demineralization of gypsum-containing tannid solutions

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Publication number
SU28281A1
SU28281A1 SU101148A SU101148A SU28281A1 SU 28281 A1 SU28281 A1 SU 28281A1 SU 101148 A SU101148 A SU 101148A SU 101148 A SU101148 A SU 101148A SU 28281 A1 SU28281 A1 SU 28281A1
Authority
SU
USSR - Soviet Union
Prior art keywords
gypsum
solutions
tannid
demineralization
calcium
Prior art date
Application number
SU101148A
Other languages
Russian (ru)
Inventor
П.А. Акимов
Р.И. Татарская
Р.И. Татарска
Original Assignee
П.А. Акимов
Р.И. Татарская
Р.И. Татарска
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by П.А. Акимов, Р.И. Татарская, Р.И. Татарска filed Critical П.А. Акимов
Priority to SU101148A priority Critical patent/SU28281A1/en
Application granted granted Critical
Publication of SU28281A1 publication Critical patent/SU28281A1/en

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Description

Предлагаемое изобретение относитс  к способу удалени  неорганических солей из .растворов таннндов, полученных , как описано в авторском свидетельстве Л; 24075, путем осаждени  таннидов гидроокисью кальци  с последуюи: ;им расщеплением танната серной кислотой. Однако, в виду значительной растворимости в таннидных растворах образующегос  при расщеплении гипса, облагороженный дубильный экстракт содержит большое количество минеральных примесей. примеси сильно понижают доброкачественность и общие технические свойства таннида и создают существенные неудобства при сгущении полученных таннидных растворов вследствие осаждени  слоев гипса на внутренней поверхности выпарных аппаратов.The present invention relates to a method for the removal of inorganic salts from tanndin solutions prepared as described in the author's certificate L; 24075, by precipitation of tannins with calcium hydroxide followed by: splitting tannate with sulfuric acid. However, in view of the significant solubility in tannid solutions of gypsum formed during splitting, the refined tanning extract contains a large amount of mineral impurities. impurities greatly lower the benignity and general technical properties of the tannid and create significant inconveniences when thickening the obtained tannid solutions due to the deposition of gypsum layers on the inner surface of the evaporators.

С целью очистки как отдельных фракдни таннидов так и всего облагороженного экстракта от примеси гипса, предлагаетс  способ деминерализации содержащих гипс таннидных растворов, который состоит 3 следующем.In order to purify both individual fractions of tannids and the whole refined extract from gypsum admixture, a method is proposed for demineralization of gypsum-containing tannid solutions, which consists of 3 as follows.

Обработанный серной кислотой таннат кальци  отстаиваетс  или центрифицируетс  дл  удалени  главной массы образовавщегос  гипса. Далее жидкость, содержаща  танниды и растворенный гипс и имеюща  слабокислую реакцию, обрабатываетс  таким количеством едкого или углекислого бари , которое необходимо дл  замещени  всего кальци  на барий в имеющемс  гипсе; по истечении некоторого промежутка времени к раствору прибавл етс  щавелева  кислрта, при чем весь едкий или углекислый кальций, образовавшийс  при прибавлении соответствующих соединений бари , переходит щав.елекислый кальций.Sulfuric acid-treated calcium tannat is settled or centered to remove the bulk of the gypsum that forms. Further, the liquid containing tannids and dissolved gypsum and having a weakly acid reaction is treated with such amount of caustic or carbonic barium that is necessary to replace all calcium with barium in the available gypsum; after some time has elapsed, oxalic acid is added to the solution, and all the caustic or calcium carbonate formed by the addition of the corresponding barium compounds passes on to the calcium sulfate.

Выпавщие осадки удал ютс  отстаиванием или центрофугирование1 1 и деминерализованный раствор сгущаетс  обычным путем.The precipitated precipitates are removed by settling or centrifuging1 1 and the demineralized solution is concentrated in the usual way.

Предмет изобретени .The subject matter of the invention.

Способ деминерализации содержащих гипс таннидных растворов, полученных по способу, описанному в авторском свидетельстве jvfe 24075, отличающийс The method of demineralization of gypsum-containing tannide solutions obtained by the method described in the author's certificate jvfe 24075,

тем, что жидкость, содержащую таннидыthe fact that the liquid containing tannins

к.-., 2 k.-, 2

и растворенный гипс, обрабатывают та- реакции, с целью YipespaiueHHH едкого КИМ количеством едкого или углекислого | или углекислого кальци  в нераствдрибари , какое достаточно дл  замещени and dissolved gypsum, are treated with such a reaction, with the aim of YipespaiueHHH caustic IMC caustic or carbon dioxide | or calcium carbonate in non-salt bribery, which is enough to replace

всего кальци  барием, и прибавл ют удал ют отстаиванием или центрофугк щавелевую кислоту до слабо кислой ; рованием.total calcium barium, and added by settling or centrifugal oxalic acid to slightly acid; roving

мий щавелевокислый кальций, которыйmia calcium oxalate which

SU101148A 1932-01-10 1932-01-10 Method for demineralization of gypsum-containing tannid solutions SU28281A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU101148A SU28281A1 (en) 1932-01-10 1932-01-10 Method for demineralization of gypsum-containing tannid solutions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU101148A SU28281A1 (en) 1932-01-10 1932-01-10 Method for demineralization of gypsum-containing tannid solutions

Publications (1)

Publication Number Publication Date
SU28281A1 true SU28281A1 (en) 1932-11-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU101148A SU28281A1 (en) 1932-01-10 1932-01-10 Method for demineralization of gypsum-containing tannid solutions

Country Status (1)

Country Link
SU (1) SU28281A1 (en)

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