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New technology for producing acrylamide by using ceramic membrane bioreactor

A technology of bioreactor and acrylamide, applied in the separation/purification of carboxylic acid amide, organic chemistry, fermentation, etc., to achieve the effects of good corrosion resistance, reduced production cost, and large processing capacity

Active Publication Date: 2012-10-03
JIANGSU JIUWU HITECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN1482250 proposes to use hollow fiber membranes to filter and separate reaction products and bacteria, and at the same time intercept part of the impurities produced by cell reactions, but this kind of membrane still has the above-mentioned insurmountable shortcomings in the production process

Method used

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  • New technology for producing acrylamide by using ceramic membrane bioreactor
  • New technology for producing acrylamide by using ceramic membrane bioreactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] like figure 1 As shown, a process for treating acrylamide fermentation liquid cells includes the following steps: pour 150kg of bacterial cell fermentation liquid (pH=5.4, wet cell content 5.8%) nitrile hydratase cell fermentation liquid a into the fermentation liquid bacteria Body water washing tank 1, and the nitrile hydratase thalline fermentation liquid a after the booster pump 2 pressurization enters the ceramic microfiltration membrane filter 3, opens the spherical valve 7, closes the spherical valve 8, and controls the temperature below 10°C. The operating pressure is 0.15MPa and the membrane surface flow rate is 4.6m / s, and the concentrated liquid c flowing out of the ceramic microfiltration membrane filter 3 is output to the fermented liquid bacteria washing tank 1, and the permeate of the ceramic microfiltration membrane filter 3 b discharge. When the concentration multiple reaches 6, add dialysis water e in the ceramic microfiltration membrane filter 3 to ca...

Embodiment 2

[0047] like figure 1 As shown, a process for treating acrylamide fermentation liquid cells includes the following steps: pour 180kg of nitrile hydratase bacterial cell fermentation liquid a containing bacterial cell fermentation liquid (pH=5.1, wet cell content 6%) into the fermentation liquid In the bacterial cell washing tank 1, the nitrile hydratase bacterial cell fermentation liquid a pressurized by the booster pump 2 enters the ceramic microfiltration membrane filter 3, opens the spherical valve 7, closes the spherical valve 8, and controls the temperature below 10°C , the operating pressure is 0.2MPa and the membrane surface flow velocity is 4.8m / s, carry out circulation concentration filtration, the concentrate c that the ceramic microfiltration membrane filter 3 flows out outputs the fermented liquid bacterium washing tank 1, the infiltration of the ceramic microfiltration membrane filter 3 Liquid b is discharged. When the concentration ratio reaches 7, add dialysis w...

Embodiment 3

[0051] like figure 1 As shown, a process for treating acrylamide fermentation liquid cells includes the following steps: pour 220kg of nitrile hydratase bacterial cell fermentation liquid a containing bacterial cell fermentation liquid (pH=5.4, wet cell content 6%) into the fermentation liquid In the bacterial cell washing tank 1, the nitrile hydratase bacterial cell fermentation liquid a pressurized by the booster pump 2 enters the ceramic microfiltration membrane filter 3, opens the spherical valve 7, closes the spherical valve 8, and controls the temperature below 10°C , the operating pressure is 0.25MPa and the membrane surface flow velocity is 6m / s, and the concentrated liquid c that flows out from the ceramic microfiltration membrane filter 3 is output to the fermented liquid bacterium washing tank 1, and the permeate from the ceramic microfiltration membrane filter 3 is 6m / s. b discharge. When the concentration ratio reaches 8, add dialysis water e in the ceramic micro...

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Abstract

The invention relates to a new technology for producing acrylamide by using a ceramic membrane bioreactor. The new technology comprises the following steps of: (1) putting nitrile hydratase thallus fermentation liquor into a ceramic membrane filter for separating and washing thalli; (2) discharging the penetrating liquid of a ceramic microfiltration membrane filter, adding a concentrated and washed nitrile hydratase containing thallus solution serving as a bio-enzyme catalytic agent to an acrylonitrile hydration reaction kettle for catalyzing the hydration reaction of acrylonitrile; and separating and removing an acrylamide product through a ceramic ultrafiltration membrane in the reaction process, and returning the nitrile hydratase containing thallus serving as the bio-enzyme catalytic agent to the reaction kettle for reuse. The new technology has the advantages that the ceramic membranes can remove impurities in the acrylamide product in high precision and timely move away the acrylamide product and can also achieve the purpose of effectively separating thalli and residues of the fermentation liquor, thereby greatly increasing the recovery rate of fermentation liquor thalli and the selectivity and purity of objective products of the following process.

Description

technical field [0001] The present invention relates to a process for concentrating and washing fermentation liquid cells when acrylamide monomer is produced by a microbial fermentation method, in particular to the application of ceramic membranes in the concentration and washing process of the fermentation liquid cells and the synthesis in ceramic membrane bioreactors Process for acrylamide monomer. Background technique [0002] Acrylamide is an important organic chemical raw material, mainly used in the synthesis of polyacrylamide. As a flocculant, thickener, reinforcing agent, polyacrylamide is widely used in many economic fields such as papermaking, coal, geology, metallurgy, textile, chemical industry, food, etc., especially the application of polyacrylamide in the petroleum industry is more prominent . Acrylamide is formed by hydration of acrylonitrile as a raw material. Since the 1950s, the production process has gone through two stages of sulfuric acid hydration a...

Claims

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Application Information

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IPC IPC(8): C12P13/02C07C233/09C07C231/24
Inventor 王志高彭文博熊福军曹恒霞张桂花杨文银
Owner JIANGSU JIUWU HITECH
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