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Fuel ethanol, and preparation method

A technology of fuel ethanol and process is applied in the field of fuel ethanol and its production process, and achieves the effects of high ethanol conversion rate, short fermentation period and low production cost

Inactive Publication Date: 2007-07-25
HEBEI AGRICULTURAL UNIV.
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a high-purity fuel ethanol mainly aimed at the difficult problems in the fuel ethanol production process; another technical problem to be solved by the present invention is to propose a method for producing fuel ethanol by fermentation of sweet sorghum Process method

Method used

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Embodiment 1

[0015] Embodiment 1: a kind of fuel ethanol, described fuel ethanol is anhydrous ethanol with a purity of more than 99%, colorless and transparent liquid.

Embodiment 2

[0016] Embodiment 2: A kind of preparation method of fuel ethanol.

[0017] (1) The sweet sorghum variety used is "Tiansi No. 1", the total sugar content is about 18% during the harvest period, and the fresh straw per mu is about 5,000 kg. After the sorghum is harvested, the sweet sorghum straw is harvested in time and squeezed with a large press;

[0018] (2) Adjust the soluble solids content of sweet sorghum juice to 16%, adjust the pH value to 5.0 with citric acid, then add 10% of activated alcoholic yeast strains, then add 0.2% ammonium sulfate, and seal at 30°C Fermentation 48h;

[0019] (3) The fermented feed liquid is distilled and dehydrated, and 182L of fuel ethanol with a purity of more than 99% can be obtained from sweet sorghum stalks harvested per mu.

Embodiment 3

[0020] Embodiment 3: A kind of preparation method of fuel ethanol.

[0021] (1) The variety of sweet sorghum used is "Tiansi No. 1", and the sorghum stalks are harvested in time after the sorghum is harvested, and cut into small pieces of about 2 cm with a cutting machine;

[0022] (2) Add 10% of activated alcoholic yeast strains to the cut sorghum stalks, then add 0.2% ammonium sulfate, and seal and ferment for 72 hours at 32°C to 34°C;

[0023] (3) The fermented raw materials are distilled and dehydrated, and 195 L of fuel ethanol with a purity of more than 99% can be obtained from sweet sorghum stalks harvested per mu.

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Abstract

This invention discloses transparent liquid fuel ethanol with purity higher than 99%. This invention also discloses a method for preparing the fuel ethanol. The method comprises: washing sweet broomcorn straw, juicing, adding 0.2% ammonium sulfate and 10% activated ethanol yeast into the juice, fermenting at 30 deg.C for 48 h, and dehydrating by distillation to obtain fuel ethanol; or cutting sweet broomcorn straw into 2 cm segments, adding 10% activated ethanol yeast, adding 0.2% ammonium sulfate, sealing and fermenting at 32-34 deg.C for 72h, and dehydrating by distillation to obtain fuel ethanol. The method has such advantages as low cost, simple process, low apparatus investment, and easy operation.

Description

Technical field [0001] The invention relates to a fuel ethanol and its production process, in particular to a process for producing ethanol by fermenting sweet sorghum stalks. Background technique [0002] According to reports, the world's proven oil reserves can still be exploited for 51 years, and the country can still be exploited for 15 years. Humans urgently need to develop clean and renewable energy to replace the increasingly depleted oil. Fuel ethanol has the advantages of cleanness, economy, and high efficiency. In recent years, projects to produce fuel ethanol from grain starchy raw materials have been launched one after another, and fuel ethanol production units with a total scale of 1.32 million tons have been built in Jilin, Henan, Anhui and Heilongjiang. However, limited to my country's national conditions, it is impossible to solve the contradiction between grain supply and demand. In December 2006, the National Development and Reform Commission explicitly pr...

Claims

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Application Information

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IPC IPC(8): C12P7/10C10L1/02C12R1/85
CPCY02E50/16Y02E50/10
Inventor 王颉周美静袁丽牟建楼
Owner HEBEI AGRICULTURAL UNIV.
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