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Method for producing pentaerythritol stearate by taking swill-cooked dirty oil as raw material

A technology of pentaerythritol stearate and pentaerythritol, which is applied in the field of chemical product preparation, can solve the problems of waste oil safety and environmental protection hazards, and achieve the effect of high purity and high yield

Inactive Publication Date: 2015-04-29
吴俊荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for producing pentaerythritol stearate using waste oil as a raw material. The method uses waste oil as a raw material to prepare pentaerythritol stearate, thereby solving the problems of safety and environmental protection hidden dangers in the existing waste oil. , can effectively reduce the preparation cost of pentaerythritol stearate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This is that the method for raw material production pentaerythritol stearate with waste oil comprises the following steps:

[0020] A. Remove the solid matter contained in the waste oil to be treated, then heat it to 70°C, and filter it through a nano-overfrequency vibration membrane group to obtain a waste oil pretreatment liquid;

[0021] B. Put the waste oil pretreatment liquid prepared in step A into a stirrer, add 0.5% concentrated sulfuric acid which accounts for 0.5% of the waste oil pretreatment liquid mass under agitation, stir evenly, heat to 65 ° C, and keep the temperature constant Stirring for 12 hours, then standing for stratification, taking the supernatant to obtain the waste oil pretreatment clear liquid;

[0022] C, the waste oil pretreatment clear liquid that B step is made is put into distillation tower earlier, is 220 ℃ at temperature, and distillation is under the condition of 0MPa in pressure; Fractional distillation at 240°C and a pressure of 0....

Embodiment 2

[0026] This is that the method for raw material production pentaerythritol stearate with waste oil comprises the following steps:

[0027] A. Remove the solid matter contained in the waste oil to be treated, then heat it to 80°C, and filter it through a nano-overfrequency vibration membrane group to obtain a waste oil pretreatment liquid;

[0028] B. Put the waste oil pretreatment liquid prepared in step A into the agitator, add 0.8% concentrated sulfuric acid which accounts for 0.8% of the waste oil pretreatment liquid mass under stirring, stir evenly, heat to 75°C, and keep the temperature constant Stirring for 8 hours, then standing for stratification, taking the supernatant to obtain the waste oil pretreatment clear liquid;

[0029] C. Put the waste oil pretreatment clear liquid obtained in step B into a distillation tower first, and distill at a temperature of 240° C. and a pressure of 0.001 MPa; then transfer the product obtained by distillation to a fractionation tower,...

Embodiment 3

[0033] This is that the method for raw material production pentaerythritol stearate with waste oil comprises the following steps:

[0034] A. Remove the solid matter contained in the waste oil to be treated, then heat it to 75°C, and filter it through a nano-overfrequency vibration membrane group to obtain a waste oil pretreatment liquid;

[0035] B. Put the waste oil pretreatment liquid prepared in step A into a mixer, add concentrated sulfuric acid which accounts for 0.6% of the waste oil pretreatment liquid mass under stirring conditions, stir evenly, heat to 70 ° C, and keep the temperature constant Stirring for 10 hours, then standing for stratification, taking the supernatant to obtain the waste oil pretreatment clear liquid;

[0036] C, the waste oil pretreatment clear liquid that B step is made is put into distillation tower earlier, and temperature is 230 ℃, and pressure is distillation under the condition of 0MPa; Fractional distillation at 245°C and a pressure of 0...

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Abstract

The invention discloses a method for producing pentaerythritol stearate by taking swill-cooked dirty oil as a raw material, belonging to the technical field of preparation of chemical products. The method comprises the following steps: preparing to-be-treated swill-cooked dirty oil into a swill-cooked dirty oil pretreatment solution, preparing swill-cooked dirty oil pretreatment liquor, distilling in a distillation tower, transferring the liquor into a fractionating tower for fractionating, thereby obtaining stearic acid; and cooling the stearic acid, adding pentaerythritol and stannous chloride, uniformly stirring, heating and carrying out an esterification reaction. According to the method disclosed by invention, the swill-cooked dirty oil is taken as the raw material, and the traditional stearic acid preparation raw material, namely palm oil is replaced, so that the swill-cooked dirty oil can be fully utilized, and the production cost of the finished pentaerythritol stearate can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical product preparation, and in particular relates to a method for producing pentaerythritol stearate with waste oil as raw material. Background technique [0002] Waste oil generally refers to all kinds of low-quality oils that exist in daily life, such as recycled cooking oil, repeatedly used frying oil, etc. The appearance of waste oil will not only pollute the environment on the one hand, but also may cause serious food safety hazards due to the return of waste oil to the dining table on the other hand. In order to eliminate the safety and environmental hazards caused by the above-mentioned waste oil, people try to convert the waste oil into safer and useful products. [0003] Pentaerythritol stearate is a white, hard, high-melting wax, soluble in ethanol and benzene. Its main uses are: high-efficiency lubricants, polyvinyl chloride stabilizers, and raw materials for plasticizers and rubber addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/33C07C67/08
CPCC07C67/08C07C51/44C11B3/008C11B3/04C07C53/126C07C69/33
Inventor 吴俊荣
Owner 吴俊荣
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