SU107488A1 - The method of producing chromium oxide - Google Patents

The method of producing chromium oxide

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Publication number
SU107488A1
SU107488A1 SU564209A SU564209A SU107488A1 SU 107488 A1 SU107488 A1 SU 107488A1 SU 564209 A SU564209 A SU 564209A SU 564209 A SU564209 A SU 564209A SU 107488 A1 SU107488 A1 SU 107488A1
Authority
SU
USSR - Soviet Union
Prior art keywords
chromium oxide
bichromate
producing chromium
ammonium
decomposition
Prior art date
Application number
SU564209A
Other languages
Russian (ru)
Inventor
А.С. Королева
Е.Н. Пинаевская
Е.Н. Пинаевска
А.М. Поляк
к А.М. Пол
Original Assignee
А.С. Королева
Е.Н. Пинаевская
Е.Н. Пинаевска
А.М. Поляк
к А.М. Пол
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 А.С. Королева, Е.Н. Пинаевская, Е.Н. Пинаевска, А.М. Поляк, к А.М. Пол filed Critical А.С. Королева
Priority to SU564209A priority Critical patent/SU107488A1/en
Application granted granted Critical
Publication of SU107488A1 publication Critical patent/SU107488A1/en

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Description

Известен способ получени  окксн хрома термическим разложением бихромата аммони . Однако этот способ обладает следующими двум  существенными недостатками: Г) разложение бихромата аммони  протекает со взрывом, 2) образующа с  окись хрома представл ет собою рыхльп тонKHii порошок с насыпным весом, не превышающим 0,15-0,2 г/ог.A known method for producing chromium oxime by thermal decomposition of ammonium bichromate. However, this method has the following two significant drawbacks: D) the decomposition of ammonium bichromate proceeds with an explosion, 2) forming chromium oxide is a loose powder with a bulk density not exceeding 0.15-0.2 g / og.

Описываемый способ лишен указанных иедостатков. Отличие его в ведении процесса термического разложени  бихромата аммони  в присутствии бихромата натри . Образуюн1а с  при этом окись хрома обладает насыпным весом, удовлетвор юпшм требовани м металлургической промьппленности .The described method is devoid of the indicated residues. Its difference in the process of thermal decomposition of ammonium bichromate in the presence of sodium bichromate. Thus, chromium oxide has a bulk weight, satisfying the requirements of metallurgical production.

Согласно изобретению,смесь, состо ща  из 1 вес. ч. бихромата аммони  и 0,5 вес. ч. бихромата натри  (в виде 70ДгНОго водного раствора), подаетс  в печь с температуро на выходе около 400. При этом бихромат аммони  разлагаетс  в течение 5 - 10 минут со слабо вспьипкои. Односреме но происходи г и .частичное разложение бихромата натри  по уравнению:According to the invention, a mixture consisting of 1 wt. including ammonium dichromate and 0.5 weight. of sodium bichromate (in the form of a 70% aqueous solution), is fed into the furnace at an outlet temperature of about 400. At the same time, ammonium dichromate decomposes within 5 to 10 minutes from a weak fluid. One-time r and partial decomposition of sodium bichromate according to the equation:

2Na.Cr,O,-Cr,0;rf 4-2Na,CrO,-1 ,О,2Na.Cr, O, -Cr, 0; rf 4-2Na, CrO, -1, O,

Эта реакци  эндотермичпа п припимает на себ  значительную часть тепла, выдел ющегос  при разложении бихромата )Hи . Дл  полного разложени  fuixpoмата натри  требуетс  посмсдх ю1пее прокаливание смеси npi 80(1 н течение одного часа. 11о jsi.ix);,e из печи полупродукт иредстав.л ет собою пористук) массу, () иыП1 ,елачиваему10 водой.This reaction of the endothermic p takes on a large part of the heat generated by the decomposition of bichromate) Hi. For the complete decomposition of fuixpomat sodium, it is necessary to calcine the mixture of npi 80 (1 n for one hour, 11 o jsi.ix) ;, e from the kiln intermediate and a porous mass), () iP1, with 10 liquors.

Раствор, содержаи, 2(0 300 гл Na.,CrO, возвращаетс  и . производство д.1  получени  бихромата натри .The solution, containing 2 (0 300 hl of Na., CrO, is returned and the production of D. 1 of the production of sodium bichromate.

Окись хрома, полученна;- после выщелачивани  nopncTOii массы, после промывки водой и высушивани  при 10J обладает насыпным весом около 2,0 г см - .Chromium oxide obtained; - after leaching the nopncTOii mass, after washing with water and drying at 10J, it has a bulk weight of about 2.0 g cm -.

Предмет изобретени Subject invention

Способ получени  окпси хрома термическим разложением бихромата аммони , о т л и ч а 10 щ и 11 с   тем, что, с целью предотврапленин № 107488 распылени  прокаливаемой массы и получени  более т желого продукта , к бихромату аммони  добавл ют бихромат натри .The method of obtaining oxime chromium by thermal decomposition of ammonium bichromate, about 10 and 11 so that, in order to prevent the calcined mass from spraying and to obtain a heavier product, sodium bichromate is added to ammonium bichromate.

SU564209A 1956-12-18 1956-12-18 The method of producing chromium oxide SU107488A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU564209A SU107488A1 (en) 1956-12-18 1956-12-18 The method of producing chromium oxide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU564209A SU107488A1 (en) 1956-12-18 1956-12-18 The method of producing chromium oxide

Publications (1)

Publication Number Publication Date
SU107488A1 true SU107488A1 (en) 1957-11-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU564209A SU107488A1 (en) 1956-12-18 1956-12-18 The method of producing chromium oxide

Country Status (1)

Country Link
SU (1) SU107488A1 (en)

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