Energy-saving hydrolyzer and method for preparing polyacrylamide polymer by post-hydrolysis method

Abstract

The invention provides an energy-saving hydrolyzer and method for preparing polyacrylamide polymers by a post-hydrolysis method. The hydrolyzer includes a stirring device, and the direct power of the stirring device of the hydrolyzer is provided by a hydraulic device. The invention also provides a method for producing polyacrylamide polymers by using the energy-saving hydrolyzer. Utilizing the hydrolyzer of the invention to produce polyacrylamide polymers can save energy and reduce consumption, and reduce production costs.

Description

technical field

[0001] The present invention relates to key equipment and related processes used in a post-hydrolysis process for preparing polyacrylamide polymers, in particular to an improved hydrolyzer and the use of the hydrolyzer to prepare polyacrylamides by post-hydrolysis The polymer method can save energy and reduce consumption, reduce production costs, and solve key problems in the post-hydrolysis process. Background technique

[0002] The hydrolysis process of polyacrylamide polymers is divided into pre-hydrolysis process and post-hydrolysis process. The post-hydrolysis process is that the acrylamide monomer becomes a colloid after polymerization, which is granulated by primary granulation equipment, and then mixed and stirred with solid sodium hydroxide with a purity of 90-99.99% under heating conditions of 50-95°C for hydrolysis. The ratio of alkali addition is 5% to 60%, and the hydrolysis time is 2 to 10 hours. The outer layer of the cylinder of the hydrolys...

Examples

Embodiment 1

[0032] Below with 4 8 ton tanks (hydrolyzers) illustrate the use situation of the hydrolyzer equipment that provides the direct power that drives stirring device with hydraulic device of the present invention.

[0033] Firstly, the granulated polyacrylamide polymer is sent into the hydrolyzer through the conveying device. Raise the temperature to meet the process requirements. When the temperature is reached, according to the process requirements, add the required amount of solid sodium hydroxide into the hydrolyzer. At this time, the colloidal particles enter the state of hydrolysis, and the hydrolysis is carried out according to the time required by the process. After the hydrolysis is completed, the material is unloaded and sent to the next process link by the conveyor. Please refer to Table 1 for relevant process conditions and hydrolysis conditions.

[0034] Table 1

[0035]

Embodiment 2

[0037] Below with 4 5 ton tanks (hydrolyzers), illustrate the use of the hydrolyzer equipment that provides the direct power of driving stirring device with hydraulic device of the present invention.

[0038]Firstly, the granulated polyacrylamide polymer is sent into the hydrolyzer through the conveying device. Raise the temperature to meet the process requirements. When the temperature is reached, according to the process requirements, add the required amount of solid alkali into the hydrolyzer. At this time, the colloidal particles enter the state of hydrolysis, and the hydrolysis is carried out according to the time required by the process. After the hydrolysis is completed, the material is unloaded and sent to the next process link by the conveyor. Please refer to Table 2 for relevant process conditions and hydrolysis conditions.

[0039] Table 2

[0040]

[0041] It can be seen from the above examples that in the process of preparing polyacrylamide polymers by the ...

technical field

[0001] The present invention relates to key equipment and related processes used in a post-hydrolysis process for preparing polyacrylamide polymers, in particular to an improved hydrolyzer and the use of the hydrolyzer to prepare polyacrylamides by post-hydrolysis The polymer method can save energy and reduce consumption, reduce production costs, and solve key problems in the post-hydrolysis process. Background technique

[0002] The hydrolysis process of polyacrylamide polymers is divided into pre-hydrolysis process and post-hydrolysis process. The post-hydrolysis process is that the acrylamide monomer becomes a colloid after polymerization, which is granulated by primary granulation equipment, and then mixed and stirred with solid sodium hydroxide with a purity of 90-99.99% under heating conditions of 50-95°C for hydrolysis. The ratio of alkali addition is 5% to 60%, and the hydrolysis time is 2 to 10 hours. The outer layer of the cylinder of the hydrolys...

Examples

Embodiment 1

[0032] Below with 4 8 ton tanks (hydrolyzers) illustrate the use situation of the hydrolyzer equipment that provides the direct power that drives stirring device with hydraulic device of the present invention.

[0033] Firstly, the granulated polyacrylamide polymer is sent into the hydrolyzer through the conveying device. Raise the temperature to meet the process requirements. When the temperature is reached, according to the process requirements, add the required amount of solid sodium hydroxide into the hydrolyzer. At this time, the colloidal particles enter the state of hydrolysis, and the hydrolysis is carried out according to the time required by the process. After the hydrolysis is completed, the material is unloaded and sent to the next process link by the conveyor. Please refer to Table 1 for relevant process conditions and hydrolysis conditions.

[0034] Table 1

[0035]

Embodiment 2

[0037] Below with 4 5 ton tanks (hydrolyzers), illustrate the use of the hydrolyzer equipment that provides the direct power of driving stirring device with hydraulic device of the present invention.

[0038]Firstly, the granulated polyacrylamide polymer is sent into the hydrolyzer through the conveying device. Raise the temperature to meet the process requirements. When the temperature is reached, according to the process requirements, add the required amount of solid alkali into the hydrolyzer. At this time, the colloidal particles enter the state of hydrolysis, and the hydrolysis is carried out according to the time required by the process. After the hydrolysis is completed, the material is unloaded and sent to the next process link by the conveyor. Please refer to Table 2 for relevant process conditions and hydrolysis conditions.

[0039] Table 2

[0040]

[0041] It can be seen from the above examples that in the process of preparing polyacrylamide polymers by the ...

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