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SU248641A1 - The method of producing calcium cyanamide - Google Patents

The method of producing calcium cyanamide

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Publication number
SU248641A1
SU248641A1 SU1230468A SU1230468A SU248641A1 SU 248641 A1 SU248641 A1 SU 248641A1 SU 1230468 A SU1230468 A SU 1230468A SU 1230468 A SU1230468 A SU 1230468A SU 248641 A1 SU248641 A1 SU 248641A1
Authority
SU
USSR - Soviet Union
Prior art keywords
product
calcium
temperature
urea
calcium cyanamide
Prior art date
Application number
SU1230468A
Other languages
Russian (ru)
Inventor
Н.А. Соколов
Б.А. Редошкин
А.М. Павлов
М.К. Сафонова
В.Г. Голов
Ю.И. Дергунов
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 filed Critical
Priority to SU1230468A priority Critical patent/SU248641A1/en
Application granted granted Critical
Publication of SU248641A1 publication Critical patent/SU248641A1/en

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  • Fertilizers (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Description

Известен снособ получени  цианамида кальци  путем взаимодействи  мочевины с окисью кальци  в мол рном отношении 3:1 при температуре ЗОО Си прокаливании продукта при температуре 700 С. Процесс провод т при высокой температуре в закрььтом котле. Однако темпер атура прокаливани  не достатота дл  получени  продукта высокой чистоты. Дл  упрощени  способа и повышени  качества продукта предлагаетс  мочевину и кальцийсодержащий продукт брать в мол 1 ном отношении 2-3:1. Процесс осуществл ю при 13О-22О С с после ;у.ш.им прокаливанием продукта при 8ОО«9ОО С, Процесс осуществл ют в очкрытом- реакторе при атмосферном или пониженном давл В качестве кальцийсодержащего продукта примен ют алкогол т кальци , окись или гнн драт окиси кальци  и карбонат кальци . Полученный продукт содержит 98-100% цианамида кальци  и пригоден дл  приготовлени  лекарственного препарата. метилата кальци  и 3,3 г (5,50-1О моль) мочевины нагревают при температуре и давлении около 1 мм рт. ст. в течение 2 час. Далее, при атмосферном аавлении в токе азота температуру реакционной смеси повышают постепенно до 900 С, После нагревани  при этой температуре в течение 2 час получают 1,7 г белого продукта . Найдено, %: Са 49,7; N34,5. Вычислено, % Са 5О,О: N35.0. Пример 2. Смесь 2 г (3,57-1О моль) окиси кальци  и 6,4 г (1О,7-1О моль) мочевины нагревают до температуры ;i2O С при атмосферном или пониженном давлении и выдерживают в этих услови х в течение 1 час. Затем реакционную смесь нагревают в токе азота до температуры 900 С и прокаливают при этой температуре в течение 1-2 час. Получают 2,6 г белого рыхлого вещества. Найдено , %: Са 50,9; 434,3. Пример 3. Смесь 2 г (2,) гидрата окиси кальци  и 4,8 г (8,0-10 моль) мочевины нагревают при температуре 14О СA known method for producing calcium cyanamide is by reacting urea with calcium oxide in a molar ratio of 3: 1 at a temperature of 309CU, calcining the product at a temperature of 700 ° C. The process is carried out at a high temperature in a closed boiler. However, the calcination temperature is not sufficient to produce a high purity product. To simplify the process and improve the quality of the product, it is proposed to take urea and calcium-containing product in a molar ratio of 2-3: 1. The process was carried out at 13О-22О С with after; by conventional ignition of the product at 8OO "9OO С. The process is carried out in an open-reactor at atmospheric or reduced pressure. Calcium alcohol, oxide or carbonate is used as the calcium-containing product. calcium oxides and calcium carbonate. The resulting product contains 98-100% calcium cyanamide and is suitable for the preparation of a medicament. Calcium methylate and 3.3 g (5.50-1O mol) of urea are heated at a temperature and pressure of about 1 mm Hg. Art. within 2 hours Further, at atmospheric pressure in a stream of nitrogen, the temperature of the reaction mixture is gradually increased to 900 ° C. After heating at this temperature for 2 hours, 1.7 g of a white product is obtained. Found,%: Ca 49.7; N34.5. Calculated,% Ca 5O, O: N35.0. Example 2. A mixture of 2 g (3.57-1O mol) of calcium oxide and 6.4 g (1O, 7-1O mol) of urea is heated to a temperature of i2O C at atmospheric or reduced pressure and maintained under these conditions for 1 hour. Then the reaction mixture is heated in a stream of nitrogen to a temperature of 900 ° C and calcined at this temperature for 1-2 hours. 2.6 g of white friable material are obtained. Found,%: Ca 50.9; 434.3. Example 3. A mixture of 2 g (2,) of calcium oxide hydrate and 4.8 g (8.0-10 mol) of urea is heated at a temperature of 14 ° C

и давлении около 1 мм рт, ст. в течение 2 час. Затем продукт нагревают до температуры 90 О С в токе азота при атмосферном давлении и выдерживают в этих услови х 1-2 час. Получают 2,0 г белого вещества. Найдено, %: Са 49,7; N35,0,and a pressure of about 1 mm Hg, Art. within 2 hours Then the product is heated to a temperature of 90 ° C in a stream of nitrogen at atmospheric pressure and kept under these conditions for 1-2 hours. Obtain 2.0 g of white matter. Found,%: Ca 49.7; N35.0,

Claims (1)

Формула изобретени  Способ получени  цианамида кальои  путем взаимодействи  мочевины с воальцийсо-The invention of the method for producing caloan cyanamide by the interaction of urea with valcium держащим продуктом, например алкогол том кальци , окисью кальци , гидратом окиси кальци , при повышенной температуре с пооледующим прокаливанием, о т л и ч а ю- щ и и с   тем, что, с целью упрощени  способа и повышени  качества продукта, мочевину и кальцийсодержащий продукт берут в мол рном отношении 2-3:1; щюдесс осуществл ют при 13О-22О С с последующим прокаливанием продукта при 8ОО-90О С,holding product, such as calcium alcohol, calcium oxide, calcium hydroxide, at elevated temperature with subsequent calcination, and with the fact that, in order to simplify the process and improve the quality of the product, urea and calcium-containing the product is taken in a molar ratio of 2-3: 1; Schyudes are carried out at 13 O-22 O C, followed by calcining the product at 8OO-90 O C,
SU1230468A 1968-04-03 1968-04-03 The method of producing calcium cyanamide SU248641A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1230468A SU248641A1 (en) 1968-04-03 1968-04-03 The method of producing calcium cyanamide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1230468A SU248641A1 (en) 1968-04-03 1968-04-03 The method of producing calcium cyanamide

Publications (1)

Publication Number Publication Date
SU248641A1 true SU248641A1 (en) 1976-07-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU1230468A SU248641A1 (en) 1968-04-03 1968-04-03 The method of producing calcium cyanamide

Country Status (1)

Country Link
SU (1) SU248641A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4408271A1 (en) * 1994-03-11 1995-09-14 Sueddeutsche Kalkstickstoff Process for the preparation of calcium cyanamide from urea

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4408271A1 (en) * 1994-03-11 1995-09-14 Sueddeutsche Kalkstickstoff Process for the preparation of calcium cyanamide from urea

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