Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for the preparation of ethanol

A technology of ethanol and saccharification, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of cell metabolism, yeast cell toxicity, unevenness, etc., to improve economic benefits, high ethanol concentration, increase yield effect

Active Publication Date: 2022-03-29
PETROCHINA CO LTD
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High osmotic pressure will not only inhibit the growth of yeast cells, but also seriously affect the metabolism of cells, resulting in lower ethanol conversion rate and longer fermentation time
On the other hand, although excessive ethanol concentration inhibits the growth of miscellaneous bacteria, it will also have strong toxicity and inhibitory effects on yeast cells, thereby reducing the ethanol metabolism level of fermentation strains
[0006] Moreover, the alcohol fermentation of thick mash needs to process more than 300g / L of raw materials. With the decrease of the ratio of feed to water, the viscosity of the mash increases rapidly, making the operation of the mash in the stirring, transportation and heating and cooling processes very difficult.
Alcohol production requires that the mash is uniform, and there is enough water around the raw material molecules to participate in the reaction. The increase in the viscosity of the mash will make the liquefaction and gelatinization reactions incomplete and uneven. This is why most factories give up the technical innovation of thick mash fermentation. reason

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for the preparation of ethanol

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] According to the background, it is known that in the prior art, there is an urgent need to develop a concentrated alcohol fermentation technique, so that it can achieve both high concentration of ethanol fermentation, and can ensure that the viscosity of the liquid meets the mixing, delivery, and heating the cooling process. The inventors of the present invention conducted a method of studying ethanol, including the step of: step S1, liquidified and glycated to obtain a saccharified fluid; step S2, step S2 The concentration of glucose in the syrup supernatant and the syrup supernatant is greater than the concentration of glucose in the saccharified liquid; the remaining saccharified liquid is blended with the syrup supernatant to obtain ethanol.

[0025] In the above-described preparation method of the present invention, since it is blended with a syrup supernatant having a solid content and a saccharified liquid, it is possible to greatly reduce the viscosity of the fermen...

Embodiment 1

[0048] The method of preparing ethanol according to the present embodiment includes the steps of:

[0049] After pulverizing corn grain size ≤ 3mm, a starch slurry having a dry mass concentration of 26% was prepared.

[0050] The dry mass concentration was 26% of the starch slurry, and the liquefaction of 55u / g was added. The liquefaction temperature was 1.4 h at 1.4 h, which was placed, liquefied, and liquefied, and then fell to 56 ° C, the volume fraction was 0.05%, 72% dilute sulfuric acid, pH adjusted to 4.0 to 4.5, and then adding 235 u / g of glycogenase, glycified 3.0 h, prepared a high sugar concentration of saccharified liquid, prepared gum The glucose concentration was 221 g / L, and the prepared partial saccharified liquid was separated from the centrifugal apparatus to obtain two parts of the saclate and the syrup supernatant, and the glucose concentration in the prepared syrup was 221 g / L.

[0051] When the yeast is activated, first empty the yeast activating can ...

Embodiment 2

[0053] The method of preparing ethanol according to the present embodiment includes the steps of:

[0054] After crushing the corn grain size ≤ 3mm, a starch slurry having a dry mass concentration of 30% was prepared.

[0055] The dry matter mass concentration was 30% of the starch slurry, and the liquefaction of 63u / g was added, the liquefied temperature was 1.8 h, which was 1.8 h, which caused the starch pulverized, liquefied, and became liquefied. ° C, and 72% dilute sulfuric acid having a volume fraction of 0.05%, pH adjusted to 4.0 to 4.5, then add 255 u / g of sugar enzyme, saccharification 2.4 h, prepared a high sugar concentration of saccharified liquid, prepared gum The glucose concentration was 255 g / L, and the preparative partially saccharified liquid was separated from the centrifugal apparatus to obtain a saccharification and the syrup supernatant, and the glucose concentration in the prepared syrup was 255 g / L.

[0056] When the yeast is activated, first empty ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a preparation method of ethanol. The preparation method includes the following steps: step S1, liquefying and saccharifying the starch slurry to obtain a saccharified mash; step S2, separating part of the saccharified mash from solid-liquid to obtain a syrup supernatant, and the concentration of glucose in the syrup supernatant is higher than that of the saccharified mash The concentration of glucose in the mash; in step S3, the remaining saccharified mash and the syrup supernatant are mixed and fermented to obtain ethanol. Since the syrup supernatant without solid content is blended and fermented with the saccharified mash, the viscosity of the fermented mash can be greatly reduced, and the mash can be more in line with the requirements of stirring, transportation and heating and cooling processes. It can be seen that the above method can also have the characteristics of high ethanol concentration, low residual sugar and energy saving, thereby greatly increasing the output and significantly improving the economic benefits.

Description

Technical field [0001] The present invention relates to the field of ethanol fermentation, in particular, to a method of preparing ethanol. Background technique [0002] Ethanol fermentation can be divided into conventional concentration fermentation and concentrated fermentation depending on the concentration of the raw material concentration. Very High Gravity Fermentation, also known as VHG fermentation, and its philosophy was initially proposed by Casey et al., The high concentrated fermentation was defined as a 100 g of fermentation liquid contained greater than or equal to 18 g of soluble solids. Later, with the development of ethanol fermentation, the concentration of fermentation raw materials continued to rise, and some believed that when the concentration of soluble solids in the fermented slurry was greater than or equal to 27 g of the slurry, it can be referred to as concentrated fermentation. Concentrated fermentation is more advantageous than the conventional concen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/06C12P19/14C12R1/865
CPCC12P7/06C12P19/14Y02E50/10
Inventor 胡世洋岳军马丹徐友海宁艳春惠继星屈海峰王继艳
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com