PL404382A1 - Method for preparing a neutral sodium pyrophosphate - Google Patents

Method for preparing a neutral sodium pyrophosphate

Info

Publication number
PL404382A1
PL404382A1 PL404382A PL40438213A PL404382A1 PL 404382 A1 PL404382 A1 PL 404382A1 PL 404382 A PL404382 A PL 404382A PL 40438213 A PL40438213 A PL 40438213A PL 404382 A1 PL404382 A1 PL 404382A1
Authority
PL
Poland
Prior art keywords
sodium pyrophosphate
neutral sodium
preparing
neutral
na4p2o7
Prior art date
Application number
PL404382A
Other languages
Polish (pl)
Other versions
PL229403B1 (en
Inventor
Agnieszka Makara
Zygmunt Kowalski
Original Assignee
Politechnika Krakowska im. Tadeusza Kościuszki
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 Politechnika Krakowska im. Tadeusza Kościuszki filed Critical Politechnika Krakowska im. Tadeusza Kościuszki
Priority to PL404382A priority Critical patent/PL229403B1/en
Publication of PL404382A1 publication Critical patent/PL404382A1/en
Publication of PL229403B1 publication Critical patent/PL229403B1/en

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  • Compositions Of Oxide Ceramics (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Abstract

Sposób otrzymywania obojętnego pirofosforanu sodu zawierającego co najmniej 85% wagowych difosforanu tetrasodu Na4P2O7, polega na tym, że do stężonego kwasu fosforowego ekstrakcyjnego lub termicznego, dodaje się stopniowo, przy ciągłym mieszaniu i rozcieraniu, sodę amoniakalną lub węglan sodu, przy stosunku molowym Na/P 1,77 - 2,0 by otrzymać produkt o sypkiej konsystencji, po czym otrzymaną mieszaninę kalcynuje się w piecach obrotowych. Przedmiotem wynalazku jest Także obojętny pirofosforan sodu otrzymany sposobem według wynalazku.The method of obtaining neutral sodium pyrophosphate containing at least 85% by weight of tetrasodium diphosphate Na4P2O7 consists in the fact that to the concentrated extractive or thermal phosphoric acid, soda ash or sodium carbonate is gradually added, with constant stirring and grinding, at the molar ratio Na/P 1.77 - 2.0 to obtain a free-flowing product, after which the resulting mixture is calcined in rotary kilns. The invention also relates to neutral sodium pyrophosphate obtained by the process according to the invention.

PL404382A 2013-06-19 2013-06-19 Method for preparing a neutral sodium pyrophosphate PL229403B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL404382A PL229403B1 (en) 2013-06-19 2013-06-19 Method for preparing a neutral sodium pyrophosphate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL404382A PL229403B1 (en) 2013-06-19 2013-06-19 Method for preparing a neutral sodium pyrophosphate

Publications (2)

Publication Number Publication Date
PL404382A1 true PL404382A1 (en) 2014-12-22
PL229403B1 PL229403B1 (en) 2018-07-31

Family

ID=52106904

Family Applications (1)

Application Number Title Priority Date Filing Date
PL404382A PL229403B1 (en) 2013-06-19 2013-06-19 Method for preparing a neutral sodium pyrophosphate

Country Status (1)

Country Link
PL (1) PL229403B1 (en)

Also Published As

Publication number Publication date
PL229403B1 (en) 2018-07-31

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