RO83586B - Process for preparing acrylamide-based flocculation polymers - Google Patents

Process for preparing acrylamide-based flocculation polymers

Info

Publication number
RO83586B
RO83586B RO105236A RO10523681A RO83586B RO 83586 B RO83586 B RO 83586B RO 105236 A RO105236 A RO 105236A RO 10523681 A RO10523681 A RO 10523681A RO 83586 B RO83586 B RO 83586B
Authority
RO
Romania
Prior art keywords
acrylamide
preparing acrylamide
polymers
based flocculation
flocculation polymers
Prior art date
Application number
RO105236A
Other languages
Romanian (ro)
Other versions
RO83586A (en
Inventor
Tadatoshi Honda
Hiroshi Itoh
Jun Saito
Tokatoshi Mitsuishi
Original Assignee
Mitsui Toatsu Chemicals Incorporated
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 Mitsui Toatsu Chemicals Incorporated filed Critical Mitsui Toatsu Chemicals Incorporated
Publication of RO83586A publication Critical patent/RO83586A/en
Publication of RO83586B publication Critical patent/RO83586B/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
    • C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
    • C08F20/52—Amides or imides
    • C08F20/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
    • C08F20/56—Acrylamide; Methacrylamide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/12—Polymerisation in non-solvents
    • C08F2/16—Aqueous medium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

Inventia se refera la un procedeu de obtinere a polimerilor floculanti pe baza de acrilamida, prin reactia de hidratare catalitica a acrilonitrilului cu apa în prezenta de cupru drept catalizator la pH = 4...10, la temperatura de 50...150 degree C si presiune cuprinsa între presiunea atmosferica si circa 10 kgf/cm2 dupa care solutia de acrilamida bruta, astfel obtinuta continînd pîna la 10 ppm fata de acrilamida, N-acrilamida prin adsorbtie fizica, adsorbtie reactiva, descompunere chimica si extractie cu solventi, aceste produse utilizîndu-se singure sau combinate si, în final, acrilamida astfel purificata se supune reactiei de polimerizare în mod cunoscut.The invention relates to a process for the preparation of acrylamide-based flocculating polymers by the catalytic hydration reaction of acrylonitrile with water in the presence of copper as a catalyst at pH = 4 ... 10 at a temperature of 50 ... 150 ° C and a pressure comprised between atmospheric pressure and about 10 kgf / cm2, whereupon the crude acrylamide solution thus obtained containing up to 10 ppm of acrylamide, N-acrylamide by physical adsorption, reactive adsorption, chemical decomposition and solvent extraction, these products utilizing either alone or combined, and finally the thus purified acrylamide is subjected to the known polymerization reaction.

RO105236A 1980-09-04 1981-09-04 Process for preparing acrylamide-based flocculation polymers RO83586B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55121743A JPS5747309A (en) 1980-09-04 1980-09-04 Preparation of acrylamide cationic high polymeric coagulant

Publications (2)

Publication Number Publication Date
RO83586A RO83586A (en) 1984-04-02
RO83586B true RO83586B (en) 1984-04-30

Family

ID=14818774

Family Applications (1)

Application Number Title Priority Date Filing Date
RO105236A RO83586B (en) 1980-09-04 1981-09-04 Process for preparing acrylamide-based flocculation polymers

Country Status (15)

Country Link
JP (1) JPS5747309A (en)
KR (1) KR860001550B1 (en)
AT (1) AT370747B (en)
AU (1) AU543111B2 (en)
CA (1) CA1223700A (en)
DD (1) DD202036A5 (en)
DE (1) DE3135149A1 (en)
ES (1) ES504916A0 (en)
FI (1) FI70032C (en)
FR (1) FR2489338B1 (en)
GB (1) GB2083053B (en)
IT (1) IT1139422B (en)
NL (1) NL186165C (en)
RO (1) RO83586B (en)
ZA (1) ZA815194B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3801736A1 (en) * 1988-01-21 1989-07-27 Nitrokemia Ipartelepek METHOD FOR PRODUCING ACRYLIC ACID AMID / ACRYLIC ACID COPOLYMERS OF HIGH MOLECULAR WEIGHT
MX18620A (en) * 1988-12-19 1993-10-01 American Cyanamid Co HIGH PERFORMANCE POLYMERIC FLOCULANT, PROCESS FOR ITS PREPARATION, METHOD FOR THE RELEASE OF WATER FROM A DISPERSION OF SUSPENDED SOLIDS AND FLOCULATION METHOD OF A DISPERSION OF SUSPENDED SOLIDS
JPH03119011A (en) * 1989-10-03 1991-05-21 Mitsui Toatsu Chem Inc Production of cationic high molecular-weight polymer
KR100318327B1 (en) * 1995-12-16 2002-04-22 구광시 Manufacturing method of emulsion type polymer coagulant
DE10041392A1 (en) * 2000-08-23 2002-03-07 Stockhausen Chem Fab Gmbh Water-soluble homopolymers and copolymers with improved environmental compatibility
JP3996535B2 (en) * 2003-03-20 2007-10-24 Ｎｅｃ液晶テクノロジー株式会社 Liquid crystal display
DE102004032766A1 (en) * 2004-07-06 2006-02-09 Röhm GmbH & Co. KG Concentrated aqueous methacrylamide solution with the addition of methacrylic acid
CN116023587B (en) * 2022-10-31 2024-05-07 中国矿业大学(北京) Iron-based hybrid flocculant and preparation method and application thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3130229A (en) * 1961-02-06 1964-04-21 Dow Chemical Co Method for the manufacture of acrylamide
AU407356B2 (en) * 1965-12-31 1970-10-22 Process for the preparation of aqueous solutions of flocculating agents of the poly-acrylic amide type having high molecular weight
DE2255391C3 (en) * 1972-11-11 1982-05-13 Bayer Ag, 5090 Leverkusen Process for the production of high molecular weight cationic copolymers
JPS5082011A (en) * 1973-11-22 1975-07-03
JPS5083323A (en) * 1973-11-29 1975-07-05
JPS5291819A (en) * 1976-01-28 1977-08-02 Mitsui Toatsu Chem Inc Purification of aqueous solutions of acrylamide
GB2059952B (en) * 1979-09-13 1983-07-20 Mitsui Toatsu Chemicals Purifying aqueous acrylamide solutions

Also Published As

Publication number Publication date
GB2083053B (en) 1984-09-12
AU7350181A (en) 1982-09-23
KR860001550B1 (en) 1986-10-04
FI70032C (en) 1986-09-12
KR830007738A (en) 1983-11-07
FR2489338B1 (en) 1987-04-30
NL186165C (en) 1990-10-01
NL8103925A (en) 1982-04-01
FI70032B (en) 1986-01-31
ES8300344A1 (en) 1982-11-01
NL186165B (en) 1990-05-01
ZA815194B (en) 1982-07-28
IT8123767A0 (en) 1981-09-03
IT1139422B (en) 1986-09-24
JPS5747309A (en) 1982-03-18
JPH0260682B2 (en) 1990-12-18
ATA381681A (en) 1982-09-15
RO83586A (en) 1984-04-02
GB2083053A (en) 1982-03-17
FR2489338A1 (en) 1982-03-05
AT370747B (en) 1983-04-25
AU543111B2 (en) 1985-04-04
DE3135149C2 (en) 1991-05-08
DD202036A5 (en) 1983-08-24
FI812485L (en) 1982-03-05
DE3135149A1 (en) 1982-04-08
CA1223700A (en) 1987-06-30
ES504916A0 (en) 1982-11-01

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