A method for total separation of components of papermaking black liquor

A technology for papermaking black liquor and a separation method, which is applied in the field of papermaking black liquor, can solve the problem of limiting the quality of lignin to improve the popularization and use of lignin, does not solve the problem of comprehensive utilization of inorganic substances in black liquor, and has not found comprehensive utilization of hemicellulose, etc. problems, to achieve the effect of saving cooling equipment investment, saving equipment investment, and simplifying the pretreatment process
CN106676931BActive Publication Date: 2019-01-08HAINAN JINHAI PULP & PAPER
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HAINAN JINHAI PULP & PAPER
Publication Date
2019-01-08

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Abstract

The invention discloses a full separating method of a papermaking black liquid component; the method includes steps of applying multi-section filtering method of an inorganic film and an organic film, and combining with acid eduction of weak acid and strong acid, effectively treating the black liquid component, separating and recycling lignin, semi-fiber and inorganic salt matter in the papermaking black liquid, acquiring high-purity lignin product; meanwhile, an additive for multi-purpose of the papermaking industry can be acquired; pulping cooking soup capable of circulation is acquired. The technique and handling method belong to a green technique, and method is simple in operation, high in efficiency, and convenient to realize large-scale popularization and application.
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Description

technical field

[0001] The invention relates to the technical field of papermaking black liquor, in particular to a method for completely separating components of papermaking black liquor. Background technique

[0002] At present, some work has been carried out on the utilization of lignin in black liquor at home and abroad, and some achievements have been made, but the research on the comprehensive utilization of various components in black liquor has just started, and the results are very few. At present, the extraction techniques of alkali lignin mainly include acid analysis method, membrane separation method, flocculation precipitation method, electrochemical method and so on. Acid analysis and membrane separation are the common methods for separating lignin from black liquor. Sulfuric acid is generally used in the acid analysis method, which is a chemical extraction method, which will produce more waste water and foul-smelling waste gas such as hydrogen sulfide gas, wh...

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
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