GB862488A - Saponification apparatus and method - Google Patents

Saponification apparatus and method

Info

Publication number
GB862488A
GB862488A GB25651/59A GB2565159A GB862488A GB 862488 A GB862488 A GB 862488A GB 25651/59 A GB25651/59 A GB 25651/59A GB 2565159 A GB2565159 A GB 2565159A GB 862488 A GB862488 A GB 862488A
Authority
GB
United Kingdom
Prior art keywords
polyvinyl
film
ester
base
slurry
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
GB25651/59A
Inventor
Michijiro Akaboshi
Tsugio Kominami
Kikuji Uragami
Seigo Fukuda
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.)
Kurashiki Rayon Co Ltd
Original Assignee
Kurashiki Rayon Co Ltd
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 Kurashiki Rayon Co Ltd filed Critical Kurashiki Rayon Co Ltd
Priority to GB25651/59A priority Critical patent/GB862488A/en
Publication of GB862488A publication Critical patent/GB862488A/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
    • B01J19/18—Stationary reactors having moving elements inside
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/70—Spray-mixers, e.g. for mixing intersecting sheets of material
    • B01F25/74—Spray-mixers, e.g. for mixing intersecting sheets of material with rotating parts, e.g. discs
    • 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
    • B01J2219/00051—Controlling the temperature
    • B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
    • B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
    • B01J2219/00094—Jackets
    • 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
    • B01J2219/18—Details relating to the spatial orientation of the reactor
    • B01J2219/185—Details relating to the spatial orientation of the reactor vertical

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

<PICT:0862488/IV (a)/1> In a method of continuously making polyvinyl alcohol from a polyvinyl ester (especially polyvinyl acetate) by base catalysed alcoholysis, a viscous alcoholic solution of the ester is introduced at 6 and flows from the adjustable annular orifice formed by the cap 9 and the lower part of the tube 5, in a cylindrical film 11. An aqueous or alcoholic solution of a strong base such as sodium hydroxide or sodium methylate is introduced at 4 and sprayed on to the inner surface of the film 11; the reacting film then falls on to the rapidly rotating disc 12 where it is further admixed and projected outwardly in the form of fine droplets towards the walls 14 of the reactor vessel, where it meets a downwardly flowing film of an additional liquid (which may be the recirculated by-product of the reaction) and flows into the slurry 17. The polyvinyl ester may be a solution of 20% by weight of polyvinyl acetate in methanol, or may be polyvinyl formate; the alcohol may be ethanol, propanol or the like. The base is suitably 23% by weight sodium hydroxide; or may be potassium hydroxide, potassium methylate or sodium methylate. Both catalyst and polymer are preheated to 35-90 DEG C. and about 0.15 mol. of basic catalyst per mol. of polymerized vinyl acetate can be used. The reactor is preferably heated by hot water circulating in the jacket 2 to 50-90 DEG C. The polyvinyl alcohol is formed as uniform small particles which may be recovered from the slurry 17 by filtration.
GB25651/59A 1959-07-27 1959-07-27 Saponification apparatus and method Expired GB862488A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB25651/59A GB862488A (en) 1959-07-27 1959-07-27 Saponification apparatus and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25651/59A GB862488A (en) 1959-07-27 1959-07-27 Saponification apparatus and method

Publications (1)

Publication Number Publication Date
GB862488A true GB862488A (en) 1961-03-08

Family

ID=10231135

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25651/59A Expired GB862488A (en) 1959-07-27 1959-07-27 Saponification apparatus and method

Country Status (1)

Country Link
GB (1) GB862488A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495086A (en) * 1981-08-19 1985-01-22 Ransburg Japan, Limited Method and apparatus for preparing emulsions
DE102013225178A1 (en) 2013-12-06 2015-06-11 Wacker Chemie Ag Process for the preparation of polyvinyl alcohol
CN108840479A (en) * 2018-07-15 2018-11-20 杭州火蓝刀锋科技咨询有限公司 A kind of printing and dyeing PVA pretreatment method for wastewater
CN114231965A (en) * 2021-11-18 2022-03-25 浙商中拓集团(浙江)新材料科技有限公司 Special-shaped low-carbon steel phosphorization saponification processing equipment
AU2016250451B2 (en) * 2016-10-28 2023-04-06 S.P.C.M. Sa Method for treating suspensions of solid particles in water

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495086A (en) * 1981-08-19 1985-01-22 Ransburg Japan, Limited Method and apparatus for preparing emulsions
DE102013225178A1 (en) 2013-12-06 2015-06-11 Wacker Chemie Ag Process for the preparation of polyvinyl alcohol
WO2015082641A1 (en) 2013-12-06 2015-06-11 Wacker Chemie Ag Method for producing polyvinyl alcohol
US10000586B2 (en) 2013-12-06 2018-06-19 Wacker Chemie Ag Method for producing polyvinyl alcohol
AU2016250451B2 (en) * 2016-10-28 2023-04-06 S.P.C.M. Sa Method for treating suspensions of solid particles in water
CN108840479A (en) * 2018-07-15 2018-11-20 杭州火蓝刀锋科技咨询有限公司 A kind of printing and dyeing PVA pretreatment method for wastewater
CN114231965A (en) * 2021-11-18 2022-03-25 浙商中拓集团(浙江)新材料科技有限公司 Special-shaped low-carbon steel phosphorization saponification processing equipment

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