Short-chain alcohol intermediate for efficiently preparing high-molecular-weight polyether synthetic oil as well as preparation method and application of short-chain alcohol intermediate

A high-molecular-weight, short-chain alcohol technology, which is applied in the field of synthetic lubricating base oil preparation, can solve the problems of increased production cost, large yield loss, and many operating procedures, and achieves difficult deactivation, low production cost, and high reactivity. Effect

Pending Publication Date: 2022-07-08
联泓(江苏)新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For low-molecular-weight intermediates (mainly using low-molecular-weight alcohols as starters), the current main production process is to use raw material alcohols to synthesize them by base catalysis, and then to remove metal ions in the intermediates through refining for subsequent use. When DMC catalyst synthesizes high-molecular-weight products, it is guaranteed that the catalyst will not be poisoned. This process has many operating procedures and relatively high costs, and the yield loss of low-molecular-weight intermediates synthesized by low-molecular-weight alcohols is large after refining, so it also increases production from the side. cost

Method used

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  • Short-chain alcohol intermediate for efficiently preparing high-molecular-weight polyether synthetic oil as well as preparation method and application of short-chain alcohol intermediate
  • Short-chain alcohol intermediate for efficiently preparing high-molecular-weight polyether synthetic oil as well as preparation method and application of short-chain alcohol intermediate
  • Short-chain alcohol intermediate for efficiently preparing high-molecular-weight polyether synthetic oil as well as preparation method and application of short-chain alcohol intermediate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Preparation of short-chain alcohol intermediates:

[0066] After mixing 150 g of the initiator dipropylene glycol and 1.12 g of the catalyst (boron trifluoride diethyl ether) and stirring evenly, vacuum and fill with N 2 Replace 5 times, heat up to 70 ℃, feed 25g of butylene oxide in 1min for induction, continue to add the remaining 373.9g of butylene oxide at a speed of 10g / min after the induction is completed, and control the reaction temperature at 85 ℃ and pressure at 50 psi, After adding butylene oxide, it was aged for 60 minutes, and then stripped in the kettle at 80 °C for 20 minutes to obtain a polyether synthetic oil intermediate with dipropylene glycol as the starting agent and a theoretical molecular weight of 490; the structural formula is as follows:

[0067]

[0068] where the y value is 2.5.

[0069] According to GPC analysis, the molecular weight distribution of the short-chain alcohol intermediate prepared in this example is PD=1.14.

Embodiment 2

[0071] Preparation of short-chain alcohol intermediates:

[0072] Mix 101.3 g of the initiator 1,2 propylene glycol and 1.60 g of catalyst (boron trifluoride diethyl ether) and stir evenly, vacuum and fill with N 2 Replace 5 times, heat up to 70 ℃, feed 25g of butylene oxide within 1min for induction, continue to add the remaining 406.4g of butylene oxide at a speed of 20g / min after the induction is completed, and control the reaction temperature at 80 ℃ and pressure at 45 psi, After adding butylene oxide, it was aged for 60 minutes, and then stripped in the kettle at 80 °C for 20 minutes to obtain a polyether synthetic oil intermediate with 1,2-propanediol as the starting agent and a theoretical molecular weight of 400; the structural formula is as follows:

[0073]

[0074] Where: y value is 2.25.

[0075] According to GPC analysis, the molecular weight distribution of the short-chain alcohol intermediate prepared in this example is PD=1.10.

Embodiment 3

[0077] Preparation of short-chain alcohol intermediates:

[0078] After mixing 115 g of n-butanol and 1.40 g of catalyst (titanium tetrachloride), the starting agent, and stirring evenly, vacuum was filled with N 2 Replace 5 times, heat up to 70°C, introduce 22g of propylene oxide for induction within 1 min, continue to add the remaining 158g of propylene oxide and 403.2g of butylene oxide at a rate of 15g / min after the induction is completed, and control the reaction temperature to 70°C , pressure 35psi, after adding butylene oxide, aging for 60min, and then stripping in the kettle at 80 ℃ for 20min to obtain a polyether synthetic oil intermediate with n-butanol as a starting agent and a theoretical molecular weight of 450; the structural formula is as follows:

[0079]

[0080] where the x value is 3.1 and the y value is 5.6.

[0081] Molecular weight distribution PD=1.08 by GPC analysis.

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Abstract

The invention discloses a short-chain alcohol intermediate for efficiently preparing high-molecular-weight polyether synthetic oil as well as a preparation method and application of the short-chain alcohol intermediate, and the short-chain alcohol intermediate is prepared by carrying out polymerization reaction on short-chain alcohol serving as an initiator and epoxide under the action of a catalyst. The preparation method is low in byproduct content, narrow in molecular weight distribution, simple in production process, free of aftertreatment and high in yield. Meanwhile, the short-chain alcohol intermediate prepared by the method disclosed by the invention is weakly acidic, so that a weakly acidic condition required by DMC catalysis in the preparation process of high-molecular polyether synthetic oil can be met, the short-chain alcohol intermediate can be directly subjected to polymerization reaction with epoxide without treatment and is not easy to inactivate, and relatively high reaction activity is maintained; meanwhile, the materials can be directly discharged without neutralization, so that the narrow-distribution high-molecular-weight oily polyether is finally prepared. Meanwhile, the short-chain alcohol intermediate is low in ion content, so that the catalytic activity of the catalyst is not influenced, and the defect of refining treatment by adopting a base catalyst is avoided.

Description

technical field [0001] The invention belongs to the technical field of preparation of synthetic lubricating base oil, and in particular relates to a short-chain alcohol intermediate for efficiently preparing high-molecular-weight polyether synthetic oil, a preparation method and application thereof. Background technique [0002] Polyether synthetic oil molecules have excellent properties such as dispersion, emulsification and lubrication because of their ether bonds and hydroxyl groups, so they have been widely used quickly. Polyether synthetic oil molecules are used as lubricants, and their main characteristics include: ① excellent viscosity-temperature properties and non-coking characteristics at high temperatures, so they can be used as lubricating oils for high temperature parts of machinery; ② excellent low temperature properties and resistance to hydrogen, Ethylene and natural gas have low solubility and good mutual solubility with freon gas, so they can be used as gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28
CPCC08G65/2609C08G65/2654C08G65/266C08G65/2663C08G65/2696Y02P20/10
Inventor 梁帅尤龙刚李贺陈明亮李磊李方
Owner 联泓(江苏)新材料研究院有限公司
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