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Method for preparing biodiesel by taking pupal oil as production raw material

A technology of biodiesel and silkworm chrysalis oil, which is applied in the direction of fat oil/fat production, biofuel, fat production, etc., can solve the problems of transportation and refining cost constraints, source and cost constraints, and limited quantity, so as to broaden the sources of raw materials, Large economic value and social significance, the effect of reducing industrial wastewater

Inactive Publication Date: 2010-04-07
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most countries in the world use vegetable oil as raw material to produce biodiesel, and its source and cost are limited; others use gutter oil or waste animal and vegetable oil as raw material, but the quantity is limited, and it is too dispersed and has too many impurities. The cost of refining is also limited
Based on the fractionation and separation of silkworm chrysalis oil, the present invention preferentially refines the unsaturated fatty acid therein, and then uses the remaining mixed fatty acid as raw material to produce biodiesel, which has not been reported so far

Method used

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  • Method for preparing biodiesel by taking pupal oil as production raw material
  • Method for preparing biodiesel by taking pupal oil as production raw material
  • Method for preparing biodiesel by taking pupal oil as production raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The silkworm chrysalis is removed from dust and impurities, dried, crushed and made into silkworm chrysalis powder. Crude silkworm chrysalis oil was extracted from silkworm chrysalis powder by heating and reflux using petroleum ether. The thick silkworm chrysalis oil of gained is mixed with 1wt% NaOH-95 ethanol solution (solvent is 95 ethanol, and the mass concentration of solute sodium hydroxide in solution is 1%, meaning is the same in the following examples), under 30 ℃ of water baths Stir and saponify for 3h, cool to room temperature, add petroleum ether to extract and remove unsaponifiable matter. Add 5wt% HCl solution to the saponification solution to acidify to pH=3-4 to obtain free fatty acid. Extract fatty acid with petroleum ether, let stand to separate layers, combine petroleum ether layer, wash to neutrality, dry, filter, recover petroleum ether, obtain mixed fatty acid, yield rate is 34.7%; Mix the methanol saturated solution of fatty acid and urea Stir a...

Embodiment 2

[0041] The silkworm chrysalis is removed from dust and impurities, dried, crushed and made into silkworm chrysalis powder. Crude silkworm chrysalis oil was extracted from silkworm chrysalis powder by heating and reflux using n-hexane. The obtained crude silkworm chrysalis oil was mixed with 10 wt% NaOH-95 ethanol solution, stirred and saponified in a water bath at 90°C for 12 hours, cooled to room temperature, and extracted with n-hexane to remove unsaponifiable matter. Add 20wt% HCl solution to the saponification solution to acidify to pH=3-4 to obtain free fatty acid. Extract fatty acid with n-hexane, let stand to separate layers, combine n-hexane layer, wash to neutrality, dry, filter, recover n-hexane to obtain mixed fatty acid with a yield of 46.3%; The solution is stirred and mixed according to the volume ratio of 1:1, clathrate at 20°C for 1 hour, the clathrate is cooled and crystallized, filtered, the obtained filtrate is extracted with n-hexane, washed with water and...

Embodiment 3

[0043] The silkworm chrysalis is removed from dust and impurities, dried, crushed and made into silkworm chrysalis powder. Crude silkworm chrysalis oil was extracted from silkworm chrysalis powder by heating and reflux using petroleum ether. The obtained crude silkworm chrysalis oil was mixed with 4wt% NaOH-95 ethanol solution, stirred and saponified in a water bath at 65° C. for 1 h, cooled to room temperature, and extracted with a small amount of petroleum ether to remove unsaponifiable matter. Add 10% HCl solution to the saponification solution to acidify to pH = 3-4 to obtain free fatty acid. Extract fatty acid with petroleum ether, let stand to separate layers, combine petroleum ether layers, wash with water until neutral, dry, filter, recover petroleum ether, and obtain mixed fatty acid with a yield of 65.0%; the ethanol saturated solution of mixed fatty acid and urea is Stir and mix at a volume ratio of 1:2, clathrate at 4°C for 2 hours, cool and crystallize the clathr...

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Abstract

The invention provides a method for preparing biodiesel by taking pupal oil as a production raw material, comprising the following steps: extracting crude pupal oil from pupal powder by petroleum ether or normal hexane through a heat refluxing method; mixing the crude pupal oil with the solution of NaOH and ethanol; stirring in water bath; adding petroleum ether or normal hexane; adding hydrochloric acid into a saponified fluid for acidification to obtain non-esterified fatty acid; extracting fatty acid by petroleum ether or normal hexane; standing and layering; mergering petroleum ether layers or normal hexane layers; washing by water to be neutral; drying; filtering to obtain the mixed fatty acid; stirring the mixed fatty acid with low alcohol saturated solution of urea to obtain clathrate compound; cooling, crystallizing and filtering the obtained clathrate compound; filtering; extracting the obtained filtrate by petroleum ether or normal hexane; washing by water and drying the extract; carrying out reduced pressure distillation on solvent to obtain unsaturated fatty acid; placing the rest pupal fatty acid into a reactor, adding solid base catalyst and stirring, adding methanol, filtering the reaction liquid after reaction, standing and laying the reaction liquid; and carrying out reduced pressure distillation on crude biodiesel to obtain the biodiesel product.

Description

technical field [0001] The invention belongs to the technical field of renewable energy or new energy, and in particular relates to a preparation method for producing biodiesel with silkworm chrysalis oil as a raw material. Background technique [0002] my country is a big country of sericulture, the annual output of cocoon silk is in the forefront in the world, and it has a huge and relatively complete production system. Among them, silkworm chrysalis is the main by-product of modern silk reeling industry. According to statistics, about 200,000 tons of dried pupae can be produced by-product in my country every year. For a long time, except that a small part has been developed into corresponding food, feed and materials and other products, most of them have been treated as waste, and silkworm chrysalis resources have not been well utilized. Silkworm chrysalis has very considerable utilization value. It is rich in chemical components such as pupa oil, protein and chitosan, ...

Claims

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Application Information

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IPC IPC(8): C11B1/10C11B3/00C11B7/00C11C3/04C10L1/02
CPCY02E50/13Y02E50/10
Inventor 王俊吴福安梁垚
Owner JIANGSU UNIV OF SCI & TECH
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