Method for producing pentaerythrite oleate by utilizing swill-cooked dirty oil

A technology of pentaerythritol oleate and gutter oil, which is applied in the field of oleochemical industry, can solve the problems of increasing the production cost of pentaerythritol oleate, lack of pretreatment and fine separation process steps, and can not meet the requirements of pentaerythritol oleate, so as to save imported raw materials Effects of foreign exchange, solving social pollution problems, and reducing raw material costs

Inactive Publication Date: 2013-07-24
QIHE COUNTY QIXIANG BIOLOGICAL SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for producing pentaerythritol oleate (PETO) using waste oil, to solve the lack of pretreatment and fine separation process steps in the prior art, and to meet the requirements of using waste oil as raw material to produce pentaerythritol oleate Need, and because the purchase price of the main raw material palm oil is much higher than that of waste oil, the price of direct import of oleic acid is higher, which requires a large amount of foreign exchange, which correspondingly increases the production cost of pentaerythritol oleate products, etc.

Method used

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  • Method for producing pentaerythrite oleate by utilizing swill-cooked dirty oil

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Effect test

Embodiment 1

[0025] 1. Early preprocessing:

[0026] A. Freezing: freeze the waste oil raw material in a freezing container at a freezing temperature of -5°C for 3 hours;

[0027] B. Filtration: filter the frozen waste oil raw material to obtain crystalline A and non-crystalline B products;

[0028] 2. Hydrolysis:

[0029] The A and B products obtained in step 1 are hydrolyzed by physical hydrolysis respectively, the hydrolysis pressure is 2.0Mpa, and the hydrolysis temperature is 220°C; the time is 10 hours; after hydrolysis, the A and B products become crude acids C and D accordingly;

[0030] 3. Distillation:

[0031] Put the crude acids C and D obtained in step 2 into negative pressure distillation in the distillation pot respectively, at a temperature of 220°C and a pressure of -0.098MPa, and then condense and collect them in a temporary storage tank for later use;

[0032] 4. Rough points:

[0033] The product of step 3 is roughly divided in a fractionation tower at a temperature...

Embodiment 2

[0041] 1. Early preprocessing:

[0042] A. Freezing: freeze the waste oil raw material in a freezing container at a freezing temperature of -15°C for 2 hours;

[0043] B. Filtration: filter the frozen waste oil raw material to obtain crystalline A and non-crystalline B products;

[0044] 2. Hydrolysis:

[0045] The A and B products obtained in step 1 are hydrolyzed by physical hydrolysis respectively, the hydrolysis pressure is 2.5MPa, and the hydrolysis temperature is 250°C; the time is 8 hours; after hydrolysis, the A and B products become crude acids C and D accordingly;

[0046] 3. Distillation:

[0047] Put the crude acids C and D obtained in step 2 into negative pressure distillation in the distillation pot respectively, at a temperature of 240°C and a pressure of -0.096MPa, and then condense and collect them in a temporary storage tank for later use;

[0048] 4. Rough points:

[0049] The product of step 3 is roughly divided in a fractionation tower at a temperature...

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Abstract

The invention relates to a method for producing pentaerythrite oleate by utilizing swill-cooked dirty oil, and belongs to the technical field of grease chemical engineering. The method increases previous preprocessing and fine separation process steps and improves distillation and esterification process steps aiming at the characteristic of complex raw material component of the swill-cooked dirty oil. The production method comprises the following processing steps of: 1, carrying out previous preprocessing: A, freezing; and B, filtering; 2, hydrolyzing; 3, distilling; 4, carrying out rough separation; 5, carrying out fine separation; 6, esterifying; and 7, packaging to obtain a pentaerythritol oleate product. The method disclosed by the invention changes the wastes into valuables by sufficiently utilizing rich resources, namely waste swill-cooked dirty oil in a catering industry, oil mill offals and swill oil, thereby solving the public nuisance problem that the swill-cooked dirty oil is taken to a dining-table and preventing the environment pollution brought by swill-cooked dirty oil wastes; and the method disclosed by the invention can be used for realizing that the quality and purity of the product is superior to or corresponding to the quality and purity of a similar product produced by taking palm oil or imported oleic acid as a raw material, reducing the raw material cost more than 50%, saving the foreign exchange and reducing the production cost, and has the advantages of wide market prospect and huge social and economic benefit.

Description

technical field [0001] The invention belongs to the technical field of oil chemical industry. Background technique [0002] Waste oil is a waste product of the catering industry, and it covers a large area. At present, there are no good waste utilization channels at home and abroad, resulting in the waste of a large amount of waste oil, causing serious environmental pollution. Some unscrupulous traders use the produced waste oil as food. Oil is served on the dining table, or used as edible oil raw material to produce various foods, which brings great harm to people's health. How to digest and process waste oil and turn waste into treasure has formed a serious social problem. [0003] Pentaerythritol oleate, also known as PETO, has excellent lubricating properties, high viscosity index, good flame resistance, and a biodegradation rate of over 90%. It is an ideal base oil for No. 68 synthetic ester type flame-resistant hydraulic oil; it can also be used for Dispensing hydraul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/58
Inventor 白秀民李洪跃陈金庆
Owner QIHE COUNTY QIXIANG BIOLOGICAL SCI & TECH
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