GB658700A - An improved method of preventing the formation of foams in chemical reactions - Google Patents

An improved method of preventing the formation of foams in chemical reactions

Info

Publication number
GB658700A
GB658700A GB10672/49A GB1067249A GB658700A GB 658700 A GB658700 A GB 658700A GB 10672/49 A GB10672/49 A GB 10672/49A GB 1067249 A GB1067249 A GB 1067249A GB 658700 A GB658700 A GB 658700A
Authority
GB
United Kingdom
Prior art keywords
reaction
vessel
phosphoric acid
chemical reactions
pict
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
GB10672/49A
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.)
Compagnie de Saint Gobain SA
Original Assignee
Compagnie de Saint Gobain SA
Manufactures des Glaces et Produits Chimiques de Saint Gobain SA
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 Compagnie de Saint Gobain SA, Manufactures des Glaces et Produits Chimiques de Saint Gobain SA filed Critical Compagnie de Saint Gobain SA
Publication of GB658700A publication Critical patent/GB658700A/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
    • B01J19/0006—Controlling or regulating processes
    • B01J19/002—Avoiding undesirable reactions or side-effects, e.g. avoiding explosions, or improving the yield by suppressing side-reactions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/02—Foam dispersion or prevention
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
    • C05B1/10—Apparatus for the manufacture of superphosphates
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00245—Avoiding undesirable reactions or side-effects
    • B01J2219/0025—Foam formation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Fertilizers (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

The prevention of foam in chemical reactions between liquids and solids or between two liquids, e.g. the reaction of acids upon phosphates or carbonates in the manufacture of fertilizers, calcium nitrate or phosphoric acid, is effected by introducing the reactants into a compartment 1 (Fig. 1) and forcing <PICT:0658700/III/1> <PICT:0658700/III/2> them, e.g. by a pump 5, into the lower part of a reaction vessel 2 at such a speed that substantially no reaction takes place until they are in the vessel, the reaction then taking place in the lower part of the vessel under the relatively high hydrostatic pressure of the mass contained therein. The reaction product is withdrawn through an adjustable outlet 7 and a portion of the liquid may be recycled over the weir 3. In a modification (Fig. 3) the reactants are fed at 19, 20 to a frusto-conical compartment 12 and then forced by a rotary helical pump 15 into the lower portion of reaction vessel 11, reaction product being withdrawn at 16 and a portion of the liquid being recycled over lip 121. One example describes the preparation of phosphoric acid by the action of sulphuric acid on phosphates in the presence of weak phosphoric acid.
GB10672/49A 1948-04-21 1949-04-21 An improved method of preventing the formation of foams in chemical reactions Expired GB658700A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR838444X 1948-04-21

Publications (1)

Publication Number Publication Date
GB658700A true GB658700A (en) 1951-10-10

Family

ID=9299048

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10672/49A Expired GB658700A (en) 1948-04-21 1949-04-21 An improved method of preventing the formation of foams in chemical reactions

Country Status (5)

Country Link
CH (1) CH280825A (en)
DE (1) DE838444C (en)
FR (1) FR1007968A (en)
GB (1) GB658700A (en)
NL (1) NL70231C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE948500C (en) * 1954-05-07 1956-08-30 Buckau Wolf Maschf R Method and device for the mechanical destruction of foam, especially for the sugar industry
US3028227A (en) * 1956-09-04 1962-04-03 Ballestra Mario Apparatus for continuously effecting sulphonation, nitration, and like strongly-exothermic reactions

Also Published As

Publication number Publication date
CH280825A (en) 1952-02-15
NL70231C (en)
FR1007968A (en) 1952-05-12
DE838444C (en) 1952-05-08

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