SU797224A1 - Method of synthesis of vinylidene diphosphonic acid or its sodium salts - Google Patents

Method of synthesis of vinylidene diphosphonic acid or its sodium salts

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Publication number
SU797224A1
SU797224A1 SU2753388/04A SU2753388A SU797224A1 SU 797224 A1 SU797224 A1 SU 797224A1 SU 2753388/04 A SU2753388/04 A SU 2753388/04A SU 2753388 A SU2753388 A SU 2753388A SU 797224 A1 SU797224 A1 SU 797224A1
Authority
SU
USSR - Soviet Union
Prior art keywords
dehydration
diphosphonic acid
drying
synthesis
sodium salts
Prior art date
Application number
SU2753388/04A
Other languages
Russian (ru)
Inventor
И.Л. Котляревский
И.С. Алферьев
Н.В. Михалин
Original Assignee
Институт химической кинетики и горения Сибирского отделения АН СССР
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 Институт химической кинетики и горения Сибирского отделения АН СССР filed Critical Институт химической кинетики и горения Сибирского отделения АН СССР
Priority to SU2753388/04A priority Critical patent/SU797224A1/en
Application granted granted Critical
Publication of SU797224A1 publication Critical patent/SU797224A1/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

FIELD: chemical technology. SUBSTANCE: method involves drying and dehydration of 1-hydroxyethylidene-1,1-di-phosphonic acid sodium dry salts at increased temperature. A mixture of 1-hydroxyethylidene-1,1-diphosphonic acid, carbonic acid sodium hydroxide taken at ratio = 1:(0.5-2):(4-6) is fed to drying that is carried out at 200-350 C followed by dehydration at 240-380 C, the end product isolation as salt or its conversion to acid. Alternative method involves the combined drying and dehydration. EFFECT: improved method of producing.
SU2753388/04A 1979-04-12 1979-04-12 Method of synthesis of vinylidene diphosphonic acid or its sodium salts SU797224A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU2753388/04A SU797224A1 (en) 1979-04-12 1979-04-12 Method of synthesis of vinylidene diphosphonic acid or its sodium salts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU2753388/04A SU797224A1 (en) 1979-04-12 1979-04-12 Method of synthesis of vinylidene diphosphonic acid or its sodium salts

Publications (1)

Publication Number Publication Date
SU797224A1 true SU797224A1 (en) 1998-02-20

Family

ID=60524914

Family Applications (1)

Application Number Title Priority Date Filing Date
SU2753388/04A SU797224A1 (en) 1979-04-12 1979-04-12 Method of synthesis of vinylidene diphosphonic acid or its sodium salts

Country Status (1)

Country Link
SU (1) SU797224A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113015718A (en) * 2018-10-04 2021-06-22 好利安科技有限公司 Amorphous form of chelating agent and process for its preparation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113015718A (en) * 2018-10-04 2021-06-22 好利安科技有限公司 Amorphous form of chelating agent and process for its preparation

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