FR2040874A5 - Purification of acrylic acid for high-molecul - ar flocculent polymers - Google Patents

Purification of acrylic acid for high-molecul - ar flocculent polymers

Info

Publication number
FR2040874A5
FR2040874A5 FR6911735A FR6911735A FR2040874A5 FR 2040874 A5 FR2040874 A5 FR 2040874A5 FR 6911735 A FR6911735 A FR 6911735A FR 6911735 A FR6911735 A FR 6911735A FR 2040874 A5 FR2040874 A5 FR 2040874A5
Authority
FR
France
Prior art keywords
acrylic acid
distillate
degrees
water below
molecul
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
FR6911735A
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.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
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 Dow Chemical Co filed Critical Dow Chemical Co
Priority to FR6911735A priority Critical patent/FR2040874A5/en
Application granted granted Critical
Publication of FR2040874A5 publication Critical patent/FR2040874A5/en
Expired legal-status Critical Current

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
    • C08F20/62—Monocarboxylic acids having ten or more carbon atoms; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • C07C51/47—Separation; Purification; Stabilisation; Use of additives by solid-liquid treatment; by chemisorption

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Acrylic acid containing organic polymerisation retarding agents are distilled through a copper packing the distillate must be recovered in water below 20 degrees C and the aqueous solution must be led over an ion-}exchange or chelating resin to reduce the Cu-content of the purified product to less than 1 p.p.m. Purified acrylic acid is used to prepare high-molecular soliumpolyacrylates which in turn are flocculating agents used esp. in very alkaline aqueous suspensions such as in the clearing of bauxite "red muds". The distillate is preferably recovered in cold mist-deionised water below 20 degrees C. Preferred monomer concentration of distillate is 8-60%, especially 30-50%. Sulphonic acid cation-exchange resins such as those described in US. Pats. 2,366,007 and 2,471,818 or chelating resins as described in US. Pat. 2,980,607 may be used.
FR6911735A 1969-04-16 1969-04-16 Purification of acrylic acid for high-molecul - ar flocculent polymers Expired FR2040874A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR6911735A FR2040874A5 (en) 1969-04-16 1969-04-16 Purification of acrylic acid for high-molecul - ar flocculent polymers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6911735A FR2040874A5 (en) 1969-04-16 1969-04-16 Purification of acrylic acid for high-molecul - ar flocculent polymers

Publications (1)

Publication Number Publication Date
FR2040874A5 true FR2040874A5 (en) 1971-01-22

Family

ID=9032471

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6911735A Expired FR2040874A5 (en) 1969-04-16 1969-04-16 Purification of acrylic acid for high-molecul - ar flocculent polymers

Country Status (1)

Country Link
FR (1) FR2040874A5 (en)

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Legal Events

Date Code Title Description
ST Notification of lapse