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A kind of partially hydrolyzed acrylamide polymer and its preparation method and application

A technology of acrylamide and polymer, which is applied in the field of partially hydrolyzed acrylamide polymer and its preparation and application, which can solve the problems of thermal oxygen degradation of polymers, achieve the effect of increasing molecular weight and reducing adverse effects

Active Publication Date: 2016-07-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, high temperature often causes thermo-oxidative degradation of the polymer

Method used

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  • A kind of partially hydrolyzed acrylamide polymer and its preparation method and application

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preparation example Construction

[0009] The invention provides a method for preparing a partially hydrolyzed acrylamide polymer. The method includes contacting and reacting acrylamide polymer colloidal particles with an inorganic basic compound under hydrolysis conditions, wherein the hydrolysis conditions include: the hydrolysis temperature is 50-120°C, the hydrolysis time is 0.5-6h, and the contact reaction between the acrylamide polymer colloidal particles and the inorganic basic compound is carried out when the volume content of oxygen in the gas phase of the reaction system is less than 3%.

[0010] In the present invention, the reaction system refers to the whole formed by the acrylamide polymer colloidal particles, the inorganic basic compound, the reaction vessel and the gas phase in the reaction vessel.

[0011] In the present invention, acrylamide polymer colloidal particles refer to the small colloidal particles formed by granulation of acrylamide-containing monomers through free radical polymerizat...

Embodiment 1

[0053] This example serves to illustrate a partially hydrolyzed acrylamide polymer and a method for its preparation.

[0054] (1) Preparation of acrylamide polymer colloid

[0055] Add 971.67 kg of AM, 28.32 kg of AMPS, and 4000 kg of deionized water into the batching kettle. Under stirring, control the temperature of the solution with frozen brine to -7°C, and add sodium hydroxide to adjust the pH to 7. Pump the monomer solution into the polymerization tank, add 50 grams of water-soluble azo initiator 2,2'-azo(2-amidinopropane) dihydrochloride and reducing agent N,N,N',N' - 50 grams of tetramethylethylenediamine, through high-purity nitrogen deoxygenation 1.0h, add 50 grams of sodium bisulfite and ammonium persulfate 50 grams, continue nitrogen until the thermocouple in the polymerization kettle starts to heat up, stop nitrogen, from Start timing when the thermocouple starts to heat up, and the reaction time is 8h.

[0056] (2) Preparation of partially hydrolyzed acrylamide...

Embodiment 2

[0059] This example serves to illustrate a partially hydrolyzed acrylamide polymer and a method for its preparation.

[0060] (1) Preparation of acrylamide polymer colloid

[0061] Add 255.39 kg of AM, 744.6 kg of purified AMPS, and 2330 kg of deionized water into the batching kettle. Under stirring, control the temperature of the solution with frozen brine to 15°C, and add sodium hydroxide to adjust the pH to 5. Pump the monomer solution into the polymerization tank, add 500 grams of water-soluble azo initiator 2,2'-azo(2-amidinopropane) dihydrochloride and reducing agent N,N,N',N' - 500 grams of tetramethylethylenediamine, through high-purity nitrogen deoxygenation 0.5h, add 500 grams of sodium bisulfite and ammonium persulfate 500 grams, continue to flow nitrogen until the thermocouple in the polymerization kettle starts to heat up, stop flowing nitrogen, from Start timing when the thermocouple starts to heat up, and the reaction time is 3h.

[0062] (2) Preparation of pa...

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Abstract

The invention discloses a partially hydrolyzed acrylamide polymer, its preparation method and its application. The method is characterized in that under hydrolysis condition, the acrylamide polymer colloid particles are contacted to an inorganic alkaline compound for reacting, wherein the hydrolysis condition comprises: the hydrolysis temperature is 50-120 DEG C, the hydrolysis time is 0.5-6 hour, and the contact reaction of the acrylamide polymer colloid particles and the inorganic alkaline compound is carried out under the condition that the oxygen volume content in gas phase of a reaction system is less than 3%. The hydrolysis efficiency is high, and the molecular weight of the partially hydrolyzed acrylamide polymer is high.

Description

technical field [0001] The invention relates to a partially hydrolyzed acrylamide polymer, a preparation method and application thereof. Background technique [0002] The degree of hydrolysis is an important indicator of partially hydrolyzed polyacrylamide (HPAM) products. The appropriate degree of hydrolysis can not only increase the water solubility, but also improve the thickening performance. At present, the production of high molecular weight partially hydrolyzed HPAM is mainly post-hydrolysis process, that is, the colloid obtained after the polymerization of acrylamide is first granulated, then the colloidal particles are contacted with alkali for hydrolysis, and then secondary granulation is carried out. After drying, crushing, sieving Get the product. Hydrolysis largely determines whether polyacrylamide colloids can be successfully modified. For example, CN1240799A and CN1498908A disclose that polyacrylamide colloids are granulated and then contacted with solid alk...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F8/12C09K8/588
Inventor 伊卓黄凤兴赵方园张文龙刘希
Owner CHINA PETROLEUM & CHEM CORP
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