RU96101708A - METHOD FOR PRODUCING PHOSPHORIC ACID - Google Patents

METHOD FOR PRODUCING PHOSPHORIC ACID

Info

Publication number
RU96101708A
RU96101708A RU96101708/25A RU96101708A RU96101708A RU 96101708 A RU96101708 A RU 96101708A RU 96101708/25 A RU96101708/25 A RU 96101708/25A RU 96101708 A RU96101708 A RU 96101708A RU 96101708 A RU96101708 A RU 96101708A
Authority
RU
Russia
Prior art keywords
phosphoric acid
calcium sulfate
phosphate
producing phosphoric
precipitate
Prior art date
Application number
RU96101708/25A
Other languages
Russian (ru)
Other versions
RU2094365C1 (en
Inventor
П.В. Классен
Б.И. Шуб
Э.В. Хлебодарова
В.Ф. Кармышов
Йонас Дастикас
Валдас Щукис
Албинас Пилкаускас
Александрас Ракаускас
Original Assignee
Открытое акционерное общество Научно-исследовательский институт по удобрениям и инсектофунгицидам им.проф.Я.В.Самойлова
Filing date
Publication date
Application filed by Открытое акционерное общество Научно-исследовательский институт по удобрениям и инсектофунгицидам им.проф.Я.В.Самойлова filed Critical Открытое акционерное общество Научно-исследовательский институт по удобрениям и инсектофунгицидам им.проф.Я.В.Самойлова
Priority to RU96101708A priority Critical patent/RU2094365C1/en
Priority claimed from RU96101708A external-priority patent/RU2094365C1/en
Application granted granted Critical
Publication of RU2094365C1 publication Critical patent/RU2094365C1/en
Publication of RU96101708A publication Critical patent/RU96101708A/en

Links

Claims (1)

Способ получения фосфорной кислоты, включающий разложение фосфатного сырья оборотной фосфорной и серной кислотами с образованием осадка сульфата кальция, состоящего из двух форм его, с последующей перекристаллизацией в полугидрат сульфата кальция при добавлении серной кислоты, фильтрацией и промывкой, отличающийся тем, что разложение ведут при добавлении серной кислоты в количестве, достаточном для получения в жидкой фазе пульпы CaO, связанном в монокальцийфосфат в количестве 0,7 - 1,7 мас.% и до получения в осадке соотношения дигидрат сульфата кальция и полугидрат сульфата кальция 1 - 5 : 1 соответственно.A method of producing phosphoric acid, including the decomposition of phosphate raw materials of reverse phosphoric and sulfuric acids with the formation of a precipitate of calcium sulfate, which consists of two forms thereof, followed by recrystallization in calcium sulfate hemihydrate by adding sulfuric acid, filtration and washing, characterized in that the decomposition is carried out by adding sulfuric acid in an amount sufficient to obtain in the liquid phase of the pulp CaO, bound in monocalcium phosphate in an amount of 0.7 - 1.7 wt.% and to obtain in the precipitate the ratio of dihydrate sul calcium phosphate and calcium sulfate hemihydrate 1 - 5: 1, respectively.
RU96101708A 1996-01-30 1996-01-30 Method of phosphoric acid production RU2094365C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU96101708A RU2094365C1 (en) 1996-01-30 1996-01-30 Method of phosphoric acid production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU96101708A RU2094365C1 (en) 1996-01-30 1996-01-30 Method of phosphoric acid production

Publications (2)

Publication Number Publication Date
RU2094365C1 RU2094365C1 (en) 1997-10-27
RU96101708A true RU96101708A (en) 1998-05-27

Family

ID=20176293

Family Applications (1)

Application Number Title Priority Date Filing Date
RU96101708A RU2094365C1 (en) 1996-01-30 1996-01-30 Method of phosphoric acid production

Country Status (1)

Country Link
RU (1) RU2094365C1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1340457A (en) * 2000-09-01 2002-03-20 山东鲁北企业集团总公司 Process for preparing phosphoric acid

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