GB408891A - Process and apparatus for producing fine-grained precipitates - Google Patents

Process and apparatus for producing fine-grained precipitates

Info

Publication number
GB408891A
GB408891A GB29721/33A GB2972133A GB408891A GB 408891 A GB408891 A GB 408891A GB 29721/33 A GB29721/33 A GB 29721/33A GB 2972133 A GB2972133 A GB 2972133A GB 408891 A GB408891 A GB 408891A
Authority
GB
United Kingdom
Prior art keywords
reaction
naphthol
mixing
pict
sulpho
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.)
Expired
Application number
GB29721/33A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Publication of GB408891A publication Critical patent/GB408891A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Finely grained precipitates are obtained by spraying reacting liquids at the moment of <PICT:0408891/III/1> mixing, or immediately after mixing but before the reaction is complete. Additional substances may be added to modify the surface-tension or to accelerate or retard the reaction. A suitable apparatus consists of two rapidly rotating bodies c, d separated by a narrow annular space e to which the reactants are admitted by passages I, II. A knife f may be projected into the space e as required to remove deposits, and the apparatus is surrounded by a collecting vessel (not shown). The following applications of the invention are described, viz. :--(1) b -naphthol is precipitated by acidifying an alkaline solution, (2) the sodium salt of the dyestuff from diazotized 2-chloro-4-sulpho-5-amino-1-benzoic acid and b -naphthol is caused to react with barium chloride, (3) a diazo-compound prepared in known manner from 3-nitro-4-toluidine is united with acetic acid anilide, forming a yellow pigment, (4) barium sulphate is obtained by reaction of the chloride with sodium sulphate.ALSO:<PICT:0408891/IV/1> Finely grained precipitates are obtained by spraying reacting liquids at the moment of mixing, or immediately after mixing but before the reaction is complete. Additional substances may be added to modify the surface-tension or the speed of the reaction. A suitable apparatus comprises two rapidly rotating bodies c, d separated by a narrow annular space e to which the reactants are admitted by passages I, II. The following applications of the invention are described, viz.: (1) b -naphthol is precipitated by acidifying an alkaline solution; (2) the sodium salt of the dyestuff from diazotized 2-chloro-4-sulpho-5-amino-1-benzoic acid and b -naphthol is caused to react with barium chloride; (3) a diazo-compound prepared in known manner from 3-nitro-4-toluidine is united with acetic acid anilide, forming a yellow pigment.
GB29721/33A 1932-10-29 1933-10-26 Process and apparatus for producing fine-grained precipitates Expired GB408891A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE408891X 1932-10-29

Publications (1)

Publication Number Publication Date
GB408891A true GB408891A (en) 1934-04-19

Family

ID=6422346

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29721/33A Expired GB408891A (en) 1932-10-29 1933-10-26 Process and apparatus for producing fine-grained precipitates

Country Status (1)

Country Link
GB (1) GB408891A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994004263A1 (en) * 1992-08-18 1994-03-03 Worcester Polytechnic Institute Preparation of solid state materials
US5417956A (en) * 1992-08-18 1995-05-23 Worcester Polytechnic Institute Preparation of nanophase solid state materials

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994004263A1 (en) * 1992-08-18 1994-03-03 Worcester Polytechnic Institute Preparation of solid state materials
US5417956A (en) * 1992-08-18 1995-05-23 Worcester Polytechnic Institute Preparation of nanophase solid state materials
US5466646A (en) * 1992-08-18 1995-11-14 Worcester Polytechnic Institute Process for the preparation of solid state materials and said materials

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