Ester lubricant base oil and synthesis method thereof

A technology for lubricating base oil and synthesis method, applied in the directions of lubricating compositions, chemical instruments and methods, base materials, etc., can solve the problems of equipment corrosion, many by-products, increase production costs, etc., and achieve the reduction of sewage discharge, The effect of speeding up the reaction and reducing the cost of raw materials

Inactive Publication Date: 2016-03-02
克拉玛依理工学院筹建办公室
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Ester lubricating oil is widely used in aviation, metal processing, textile and food processing and other fields due to its good viscosity-temperature characteristics, strong oxidation resistance, superior lubricity and biodegradability. With the continuous improvement of environmental protection requirements, ester lubricating oil Synthetic lubricating oils will continue to replace existing mineral oils, especially in the field of refrigerating machine oils, which have good development prospects and potential. However, the current domestic production scale of ester lubricating oils is relatively small, and the production process has obvious defects, making production The cost is relatively high, and the product quality is not ideal, mainly in the following aspects:
[0003] 1. The use of liquid acidic catalysts, especially sulfuric acid and phosphoric acid, which are highly corrosive, is not only difficult to control the reaction, but also has a low conversion rate, many by-products, and serious corrosion to equipment. The product needs to be neutralized, washed and other follow-up treatments, resulting large amount of waste water
[0004] 2. The excess organic acid added in the production process has not been well separated and recycled, which increases the production cost
[0005] 3. The acid value of the produced product is too large (greater than 0.5mgKOH / g), the oxidation stability is not ideal, and it cannot be used as a lubricating oil base oil in a wide range
[0006] In addition, the catalysts used in the prior art may also be p-toluenesulfonic acid, tributyl phosphate, etc. These catalysts are difficult to recover after use, and basically remain in the product, reducing the quality and performance of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] A kind of synthetic method of ester lubricating oil base oil, comprises the steps:

[0038] 1) Using an acidic solid as a catalyst, react with an organic acid or an organic alcohol as a raw material at 120-180°C for 2 to 6 hours to generate a crude ester;

[0039] 2) filtering the gained crude ester, reclaiming the acidic solid catalyst for reuse;

[0040] 3) Distill the crude ester obtained after filtration to remove excess organic acid; the vacuum distillation conditions are 150-250°C, 10-1kPa residual pressure; then perform molecular distillation to further remove incompletely reacted intermediate products , to obtain a preliminary refined ester; the molecular distillation conditions are 250-300°C, 0.1-0.01kPa; the separated organic acid can be recycled;

[0041] 4) Depickling the obtained preliminary refined ester with an anion exchange resin to reduce the acid value of the product to below 0.1mgKOH / g, and then dehydrating and drying through vacuum distillation to ...

Embodiment 1 3

[0042] The synthesis of embodiment 1 trimethylolpropane hexanoate

[0043] Put trimethylolpropane and hexanoic acid in a molar ratio of 1:3.2 into the reactor, add an appropriate amount of solvent, add an acidic solid catalyst with a total weight of 0.1% of acid alcohol under stirring, heat up to 120-130°C for 3 hours, and then raise the temperature To 140-150°C, continue the reaction for 3 hours, synthesize crude ester, filter and recover the acidic solid catalyst, distill the excess hexanoic acid under reduced pressure at 150-200°C, 5kPa residual pressure, the recovered hexanoic acid can be used as raw material again, at 250 ~300°C, molecular distillation intermediate product at 0.1KPa, the preliminary refined ester enters the weakly basic macroporous anion exchange resin (D301R) column for further deep deacidification until the acid value is reduced to below 0.1mgKOH / g, and finally in Dry under reduced pressure at normal temperature of 2.5-3KPa to obtain trimethylolpropane ...

Embodiment 2

[0045] The synthesis of embodiment 2 pentaerythritol hexanoate

[0046]Pentaerythritol and hexanoic acid (recovered partly from Example 1) are dropped into the reactor in a molar ratio of 1: 4.2, an appropriate amount of solvent is added, and an acidic solid catalyst (recovered from Example 1) of 0.1% of the total weight of acid alcohol is added under stirring, and the temperature is raised to React at 130-140°C for 3 hours, then increase the temperature to 150-160°C, and continue the reaction for 3 hours to synthesize crude ester, filter and recover the acidic solid catalyst, distill excess hexanoic acid under reduced pressure at 150-200°C and 5kPa residual pressure, and recover The hexanoic acid can be used again as a raw material, and the intermediate product is molecularly distilled at 250-300°C and 0.1KPa, and the preliminary refined ester enters a weakly basic macroporous anion exchange resin (D301R) column for further deep deacidification until the acid value Reduce to ...

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Abstract

The invention relates to ester lubricant base oil and a synthesis method thereof. The synthesis method comprises that acidic solid as a catalyst is added into an organic acid and an organic alcohol in a reactor, the raw materials undergo a reaction at a temperature of 150-180 DEG C for 2-6h to produce a crude ester, the excess organic acid or organic alcohol is separated by a reduced pressure distillation or molecular distillation method, the acid is further removed by an anion exchange resin so that an acid value is reduced to 0.1mg KOH / g or less and the high-quality ester lubricating base oil is obtained, and the separated organic acid or organic alcohol can be recycled and be used as raw materials for the next same reaction system so that a cost is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of synthesis of ester compounds in organic chemistry, in particular to polyol ester lubricating oil base oil and a synthesis method thereof. Background technique [0002] Ester lubricating oil is widely used in aviation, metal processing, textile and food processing and other fields due to its good viscosity-temperature characteristics, strong oxidation resistance, superior lubricity and biodegradability. With the continuous improvement of environmental protection requirements, ester lubricating oil Synthetic lubricating oils will continue to replace existing mineral oils, especially in the field of refrigerating machine oils, which have good development prospects and potential. However, the current domestic production scale of ester lubricating oils is relatively small, and the production process has obvious defects, making production The cost is relatively high, and the product quality is not ideal, mainly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M105/38C07C67/08C07C69/30C07C69/33C10N30/02C10N40/25
Inventor 张海兵吴梅努尔古丽张国伟吕秀荣
Owner 克拉玛依理工学院筹建办公室
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