Biodiesel pour-point depressant, its preparation method and application

A technology of biodiesel and pour point depressant, which is applied in the application field of the mixture, and can solve the problems such as the cold filter point is difficult to work, and the freezing point of biodiesel is lowered.

Inactive Publication Date: 2012-05-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can effectively reduce the freezing point of biodiesel under the condition of

Method used

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  • Biodiesel pour-point depressant, its preparation method and application
  • Biodiesel pour-point depressant, its preparation method and application
  • Biodiesel pour-point depressant, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A mixture of 64.5 g of tetradecyl methacrylate and cetyl methacrylate, 12.1 g of 2-hydroxy ethyl methacrylate, 1.12 g of dodecyl mercaptan, 60 g of toluene and 0.096 g of over Benzoyl oxide in N 2 Protect and keep at normal pressure at 110-120°C for 8 hours, distill off toluene, the obtained additive has a number average molecular weight of 9501 and a dispersion of 1.759. The cold filtration point of cottonseed oil biodiesel can be reduced by 6°C when the addition amount is 0.1wt%, while polymethacrylate can only reduce the cold filtration point of cottonseed oil biodiesel by 1°C under the same conditions.

Embodiment 2

[0051] A mixture of 51.1 g of isooctyl methacrylate, lauryl methacrylate, cetyl methacrylate and stearyl methacrylate was mixed with 5.3 g of 2-hydroxypropyl methacrylate, 1.4 g of Dialkylthiol, 56.2g of toluene, 0.124g of benzoyl peroxide N 2 Protected and maintained at normal pressure at 110-120°C for 8 hours, distilled off toluene, the obtained additive had a number average molecular weight of 10023 and a dispersion of 1.675. In the case of adding 0.1wt%, the cold filter point of a certain petrochemical diesel can be reduced by 5°C, while the change of the cold filter point of the petrochemical diesel by polymethacrylate under the same conditions is only 2°C.

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Abstract

The invention relates to a biodiesel pour-point depressant, its preparation method and application. The biodiesel pour-point depressant comprises a mixture consisting of 3-30 wt% of alfa-OH polyester compounds and 70-97 wt% of poly alkyl methacrylate. The biodiesel pour-point depressant has good depressive effect on biodiesel, petrochemical diesel oil, or mixtures of biodiesel and petrochemical diesel oil, and especially has good effect of lowering the cold filter plugging point.

Description

technical field [0001] The present invention relates to a novel pour point depressant with α-OH polyester compound and polyalkylmethacrylate mixture and its continuous production method, and the pour point depressant in biodiesel, petrochemical diesel or a mixture of the two in the application. Background technique [0002] Biodiesel is a mixture of fatty acid esters obtained by transesterification of animal and vegetable oils and short-chain alcohols. It has the characteristics of renewable raw materials and environmental friendliness. However, unlike petrochemical diesel, the crystallization of biodiesel wax can occur at a higher temperature, which limits the use in low temperature regions and low temperature conditions; α-Olefins can reduce the freezing point of biodiesel to a certain extent, but it is difficult to reduce its cold filter point. [0003] US0039238 discloses ozonated animal and vegetable oils as biodiesel pour point depressant. The freezing point of biod...

Claims

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Application Information

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IPC IPC(8): C10L1/196C10L1/195C10L1/19C08F220/18C08F220/28
Inventor 安文杰周旭光徐小红张心玲谢建海黄卿杨蕾杨淑芳高鹏刘涛
Owner PETROCHINA CO LTD
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