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Method for preparing propanediol composite anti-freezing agent

A preparation method and technology of propylene glycol, applied in the chemical industry, can solve the problems of unsatisfactory antifreeze effect, accelerated condensation and hardening, etc., and achieve excellent antifreeze ability, good function, good air entrainment and water reduction effect.

Inactive Publication Date: 2014-01-29
XINYI HANLING BIO ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Antifreeze is designed and developed for winter building concrete construction. It can accelerate the condensation and hardening of concrete under negative temperature conditions. The strength increases significantly and does not affect the development of later strength. A single antifreeze is often not effective, and composite products are generally used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Send propylene glycol accounting for 73% of the total amount into the chemical reaction kettle, raise the temperature to between 33°C and 35°C, stir, and respectively add urea accounting for 14% of the total amount and bicarbonate accounting for 4% of the total amount Sodium was added to the reaction kettle, stirred and reacted for 25 minutes; the temperature was lowered to normal temperature, continued to stir, and 5% of the total amount of sodium lauryl sulfate air-entraining agent and 4% of the total amount of sorbitol high-efficiency water reducer were added Reactor, stirring and reacting for 15 minutes, then stop stirring to obtain the finished product; when in use, the propylene glycol composite antifreeze agent can be mixed into the concrete in an amount of 3%-5%.

Embodiment 2

[0015] Send propylene glycol accounting for 74% of the total amount into the chemical reaction kettle, raise the temperature to between 33°C and 35°C, stir, and respectively add 13% of the total amount of urea and 4% of the total amount of hydrogen carbonate Sodium was added to the reaction kettle, stirred and reacted for 25 minutes; the temperature was lowered to normal temperature, continued to stir, and 5% of the total amount of sodium lauryl sulfate air-entraining agent and 4% of the total amount of sorbitol high-efficiency water reducer were added Reactor, stirring and reacting for 15 minutes, stop stirring to get the finished product; when in use, the propylene glycol composite antifreeze agent can be mixed into the concrete at an amount of 3%-5%.

Embodiment 3

[0017] Send propylene glycol accounting for 75% of the total amount into the chemical reaction kettle, raise the temperature to between 33°C and 35°C, stir, and respectively add 12% of the total amount of urea and 4% of the total amount of hydrogen carbonate Sodium was added to the reaction kettle, stirred and reacted for 25 minutes; the temperature was lowered to normal temperature, continued to stir, and 5% of the total amount of sodium lauryl sulfate air-entraining agent and 4% of the total amount of sorbitol high-efficiency water reducer were added Reactor, stirring and reacting for 15 minutes, stop stirring to get the finished product; when in use, the propylene glycol composite antifreeze agent can be mixed into the concrete at an amount of 3%-5%.

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Abstract

The invention discloses a method for preparing a propanediol composite anti-freezing agent. The product belongs to the field of a chemical industry. By adopting the method disclosed by the invention, the propanediol composite anti-freezing agent is produced by taking propanediol, urea, sodium bicarbonate, a lauryl sodium sulfate air-entraining agent, and a sorbitol high-efficiency water reducing agent as auxiliary materials and a chemical reaction kettle as a container under assist of specific temperature and reaction time. The lauryl sodium sulfate air-entraining agent has the characteristics that the peaceability of a concrete mixture can be significantly improved, so that the liquidity is increased; the freezing resistance of commercial concrete is improved; the anti-freezing agent is excellent in effect; the pumpability of the concrete and the fineness of the surface can be improved by the sorbitol high-efficiency water reducing agent; the sorbitol high-efficiency water reducing agent has a significant synergistic effect after being compounded with the propanediol. The method used by the invention is simple in technology, and mild in reaction condition; the product not only has excellent anti-freezing ability, but also has good air-entraining and water-reducing functions.

Description

technical field [0001] The product of the invention belongs to the field of chemical industry, and in particular relates to a preparation method of a propylene glycol composite antifreeze. Background technique [0002] Antifreeze is designed and developed for winter building concrete construction. It can accelerate the condensation and hardening of concrete under negative temperature conditions. The strength increases significantly and does not affect the development of later strength. A single antifreeze is often not effective, and composite products are generally used. . Antifreeze is generally composed of main materials and auxiliary materials. Propylene glycol is a good antifreeze main material. Propylene glycol is also known as propylene glycol and 1,2 propylene glycol. Its molecular formula is C3H8O2 and its molecular weight is 76.09. Tasteless and odorless, miscible with water, ethanol and various organic solvents. The main use of propylene glycol is: it is an impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16
Inventor 不公告发明人
Owner XINYI HANLING BIO ENG
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