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Method for preparing adipic acid polyester polyol by mixing reclaimed carbinol condensate

A technology of adipic acid polyester and condensate, which is applied in the field of polyester polyol synthesis, can solve environmental pollution and other problems, achieve broad application prospects and simple synthesis process

Active Publication Date: 2015-04-29
SICHUAN LUTIANHUA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the condensate in the storage tank is directly discharged, it will pollute the environment, and there are few public reports on how to recycle this part of the condensate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 200 grams of propylene glycol, 50 grams of recovered alcohol condensate, 375 grams of adipic acid, and 0.75 grams of catalyst metal salt (potassium salt of phosphoric acid) to the reactor in sequence, turn on the vacuum, the vacuum degree is 0.045 MPa, and heat to 120 ° C, reaction 6 hour; then raise the temperature to 160°C, and raise the vacuum to 0.095MPa, react for 3 hours and then cool down to 100°C, break the vacuum, filter the material in the reactor, return the filtrate to the reactor, and then raise the temperature to 240°C for 3 Hours, sampling test, according to GB / T9104-2008 "Industrial Stearic Acid Test Method Acid Value Determination" standard to measure its acid value mgKOH / g, GB265-88 "Petroleum Products Kinematic Viscosity Determination and Dynamic Viscosity Calculation Method" standard determination Its viscosity, the acid value of its product is 4.6 mgKOH / g, the viscosity (100°C) is 343 mm2 / s, the esterification rate is 99.4%, and the product yield...

Embodiment 2

[0036] Add 180 grams of propylene glycol, 40 grams of recovered alcohol condensate, 300 grams of adipic acid, and 0.6 grams of catalyst metal salt (potassium salt of phosphoric acid) to the reaction kettle in turn, turn on the vacuum, the vacuum degree is 0.045MPa, and heat to 120 ° C, reaction 5 Hours; then raise the temperature to 160°C, and raise the vacuum to 0.095MPa, react for 2 hours and then cool down to 100°C, break the vacuum, filter the material in the reactor, return the filtrate to the reactor, and then raise the temperature to 240°C for 2.5 Hours, sampling test, according to GB / T9104-2008 "Industrial Stearic Acid Test Method Acid Value Determination" standard to measure its acid value mgKOH / g, GB265-88 "Petroleum Products Kinematic Viscosity Determination and Dynamic Viscosity Calculation Method" standard determination Its viscosity, the acid value of its product is 3.2 mgKOH / g, the viscosity (100°C) is 318 mm2 / s, the esterification rate is 99.6%, and the product ...

Embodiment 3

[0041] Add 170 grams of propylene glycol, 30 grams of recovered alcohol condensate, 326 grams of adipic acid, and 0.56 grams of catalyst metal salt (potassium salt of phosphoric acid) to the reactor in sequence, turn on the vacuum, the vacuum degree is 0.045 MPa, and heat to 120 ° C, reaction 4 Hours; then raise the temperature to 150°C, and raise the vacuum to 0.095MPa, react for 2 hours and then cool down to 100°C, break the vacuum, filter the material in the reactor, return the filtrate to the reactor, and then raise the temperature to 240°C for reaction 2 Hours, sampling test, according to GB / T9104-2008 "Industrial Stearic Acid Test Method Acid Value Determination" standard to measure its acid value mgKOH / g, GB265-88 "Petroleum Products Kinematic Viscosity Determination and Dynamic Viscosity Calculation Method" standard determination Its viscosity, the acid value of its product is 4.6 mgKOH / g, the viscosity (100°C) is 411 mm2 / s, the esterification rate is 99.4%, and the pro...

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Abstract

The invention discloses a method for preparing adipic acid polyester polyol by mixing reclaimed carbinol condensate. The condensate flowing through a reaction condenser and collected in a condensation tank is fed into a reaction kettle together with low-molecular polyol, adipic acid and a catalyst to prepare adipic acid polyester polyol. According to the method, a synthesis process is simple; the raw materials are ordinary stable chemical materials on the market, so that the problem of shortage of raw materials is solved; not only can adipic acid polyester polyol be produced, but also polyol condensate can be directly reclaimed; the adoption of a water-carrying agent such as methylbenzene and dimethylbenzene is avoided, so that the problems of toxicity, environmental pollution, high reclaiming cost and the like caused by an organic solvent are solved, the yield of the product is further improved, and environmental pollution is reduced; the process is convenient to operate and feasible, and the method has broad application prospect.

Description

technical field [0001] The invention relates to the field of polyester polyol synthesis, in particular to a method for preparing adipic acid polyester polyol by mixing recovered alcohol condensate. Background technique [0002] Adipic acid polyester polyol is synthesized from raw materials such as adipic acid, low molecular weight polyol and catalyst under certain process conditions. It is one of the important raw materials for producing polyurethane materials. This product has excellent heat resistance and durability, good oil resistance and soapy water extraction resistance, and good low temperature usability. It also has good biodegradability and is one of the more promising industrial-grade environmental protection materials. Widely used in oil-resistant and high-temperature-resistant special products, such as oil-resistant hoses, high-temperature-resistant, high-humidity non-migrating cable materials, high-temperature-resistant wire covering layers, insulating material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/16C08G63/78
Inventor 李勇任春华宁忠培戴志谦蒋英熊斌林朝阳蒋弟勇
Owner SICHUAN LUTIANHUA
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