FR2318112A1 - Sodium peroxycarbonate crystals continuous prepn. - from hydrogen peroxide and sodium carbonate soln. - Google Patents

Sodium peroxycarbonate crystals continuous prepn. - from hydrogen peroxide and sodium carbonate soln.

Info

Publication number
FR2318112A1
FR2318112A1 FR7621627A FR7621627A FR2318112A1 FR 2318112 A1 FR2318112 A1 FR 2318112A1 FR 7621627 A FR7621627 A FR 7621627A FR 7621627 A FR7621627 A FR 7621627A FR 2318112 A1 FR2318112 A1 FR 2318112A1
Authority
FR
France
Prior art keywords
sodium
soln
peroxycarbonate
specific weight
crystals
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
FR7621627A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FMC Corp
Original Assignee
FMC Corp
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 FMC Corp filed Critical FMC Corp
Publication of FR2318112A1 publication Critical patent/FR2318112A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0018—Evaporation of components of the mixture to be separated
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B15/00—Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
    • C01B15/055—Peroxyhydrates; Peroxyacids or salts thereof
    • C01B15/10—Peroxyhydrates; Peroxyacids or salts thereof containing carbon
    • C01B15/103—Peroxyhydrates; Peroxyacids or salts thereof containing carbon containing only alkali metals as metals

Abstract

Prepn. of stable sodium peroxycarbonate of high apparent specific weight and uniform particle size, comprises continuous crystallisation by the following method:- (a) 50-90% Aq H2O2 and purified Na2CO3 soln. are introduced continuously into a crystallisation zone; (b) the two are reacted maintaining the concn. of the sodium peroxycarbonate above the saturation level under 0.5-15 hrs; (c) water is evaporated at 1.5-15 mols/mol of sodium peroxycarbonate produced; (d) a crystal suspension is withdrawn, the crystals sepd. and dried to recover sodium peroxycarbonate of specific weight 0.9-1 g/cm3; (ee the sepd. mother liquor is treated to decompose H2O2; fresh sodium carbonate is added to form a 25-33% soln. at 27 degrees C or above and (f) the Na2CO3 soln. is purified to removve Fe and other transition metals, then the treated soln. is passed to stage (a). The prod. is used as a bleaching agent in detergent compsns. The process gives crystals of high specific weight, which are easily dried and are less friable and have less tendency to segregate in compsns.
FR7621627A 1975-07-15 1976-07-15 Sodium peroxycarbonate crystals continuous prepn. - from hydrogen peroxide and sodium carbonate soln. Withdrawn FR2318112A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US59618775A 1975-07-15 1975-07-15

Publications (1)

Publication Number Publication Date
FR2318112A1 true FR2318112A1 (en) 1977-02-11

Family

ID=24386306

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7621627A Withdrawn FR2318112A1 (en) 1975-07-15 1976-07-15 Sodium peroxycarbonate crystals continuous prepn. - from hydrogen peroxide and sodium carbonate soln.

Country Status (9)

Country Link
JP (1) JPS5220999A (en)
BE (1) BE844167A (en)
CA (1) CA1070084A (en)
DE (1) DE2631917A1 (en)
ES (1) ES449815A1 (en)
FR (1) FR2318112A1 (en)
IT (1) IT1062528B (en)
NL (1) NL7607869A (en)
SE (1) SE7608054L (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0703190A1 (en) * 1994-09-22 1996-03-27 SOLVAY INTEROX (Société Anonyme) Process for the production of persalt particles
EP0748764A1 (en) * 1995-06-08 1996-12-18 AUSIMONT S.p.A. Process for producing sodium percarbonate in granular form

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3163044D1 (en) * 1980-05-15 1984-05-17 Interox Chemicals Ltd The production of alkali metal or alkaline earth metal peroxides and peroxides when so produced
JPS5751102A (en) * 1980-09-09 1982-03-25 Mitsubishi Gas Chem Co Inc Preparation of high-quality sodium percarbonate
IT1142023B (en) * 1981-07-20 1986-10-08 Montedison Spa PROCEDURE FOR THE PREPARATION OF SODIUM PERCARBONATE
JPS58195594U (en) * 1982-06-21 1983-12-26 有限会社荻野工業所 toilet paper stocker
US4966762A (en) * 1988-10-06 1990-10-30 Fmc Corporation Process for manufacturing a soda ash peroxygen carrier
FR2746386B1 (en) 1996-03-19 1998-04-24 Atochem Elf Sa NOVEL SODIUM PERCARBONATE AND PROCESS FOR OBTAINING IT

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0703190A1 (en) * 1994-09-22 1996-03-27 SOLVAY INTEROX (Société Anonyme) Process for the production of persalt particles
EP0748764A1 (en) * 1995-06-08 1996-12-18 AUSIMONT S.p.A. Process for producing sodium percarbonate in granular form

Also Published As

Publication number Publication date
SE7608054L (en) 1977-01-16
CA1070084A (en) 1980-01-22
JPS5220999A (en) 1977-02-17
BE844167A (en) 1977-01-17
ES449815A1 (en) 1977-08-01
IT1062528B (en) 1984-10-20
NL7607869A (en) 1977-01-18
DE2631917A1 (en) 1977-02-03

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Legal Events

Date Code Title Description
ST Notification of lapse