CN100358976C

CN100358976C - Method for highly refining wood and bamboo vinegar liquid

Info

Publication number: CN100358976C
Application number: CNB2003101162486A
Authority: CN
Inventors: 胡福昌; 王正郁
Original assignee: LISHUI SENDELI BIO-AGRICULTURAL RESEARCH DEVELOPMENT Co Ltd
Current assignee: Zhejiang Forest Bamboo Charcoal Co ltd
Priority date: 2003-11-13
Filing date: 2003-11-13
Publication date: 2008-01-02
Anticipated expiration: 2023-11-13
Also published as: CN1616600A

Abstract

The present invention relates to a method for highly refining wood and bamboo vinegar liquid. Raw liquid or colored distillation liquid of wood and bamboo vinegar liquid is added with 0.1 to 20% of aqueous hydrogen peroxide solution according to the weight or the volume of processed liquid; at the normal temperature or the raised temperature, mixed liquid is stirred and is positioned without movement for certain time; then, obtained liquid is distilled, and colorless transparent wood and bamboo vinegar liquid which is highly refined is obtained. The present invention has the advantages that the decoloring capability is strong, no harmful substances are residual, the operation is simple, the processing cost is low, etc.

Description

Wood, the highly refined method of bamboo vinegar liquid

Technical field the invention belongs to thermal decomposition of wood field and field of fine chemical, is the method about the purification of the product liquid wood that produces in the wood distillation carbonization process, bamboo vinegar liquid.

The resulting acidity of pyrolysis gas (common name flue gas) condensation, reddish-brown or the dark-brown aqueous solution that background technology wood, bamboo vinegar liquid produce when being wood, bamboo wood dry distillation charring, use as crude substance in recent years and be subject to people's attention, studies show that it has many reality and potentiality purposes in health care and food-processing, but must could use by purification..Patent application 02136544 has proposed a kind of method of purification of bamboo vinegar liquid, and wherein to be fresh bamboo vinegar liquid that dry distillation charring equipment is obtained add handling of chemical such as anhydrous Ami sodium sulfate, Sodium Metabisulfite, V-Brite B and hydrogen peroxide at 100～150 ℃ after distilling to the method for making of refined bamboo vinegar more by a certain percentage.The main shortcoming one of this method is that the additive kind is too many, is not easy deployed; The 2nd, reductive agent and oxygenant are mixed processing as if having contradiction on the mechanism, the result of operation also often occurs handling the back than handling the preceding also dark phenomenon of color; The 3rd, Ami vitriol is to belong to the harmful chemical component that is limited by strictness in the sanitary index of medicine and food, and not allowing so, big amount remains in the solution.

Summary of the invention the purpose of this invention is to provide the highly refined method of a kind of wood, bamboo vinegar liquid, and this method is only added in treating process only hydrogeneous in a small amount of chemical and its molecular structure, two kinds of elements of oxygen can obtain the refining wood of achromatism and clarity, bamboo vinegar liquid.

The inventor finds by test; the color of wood, bamboo vinegar liquid is formed by some colourless but spontaneous variations of the very active material of chemically reactive originally; colourless wood, bamboo vinegar liquid that distillation just obtains, color just appears in several seconds that have, and promoter action is significantly arranged under illumination condition.If imagination makes these materials it change structure by reaction earlier, the wood after the distillation, bamboo vinegar liquid just might no longer develop the color.The repetition test result who carries out shows in view of the above, and the distillation of going again after the interpolation aqueous hydrogen peroxide solution combination treatment can achieve the above object.Specifically in wood, the stoste of bamboo vinegar liquid or colored distillate, add and count 0.1～20% aqueous hydrogen peroxide solution by processed liquid weight or meausurement, leave standstill certain hour at normal temperature or under heating after the stirring, and then distill, condensation and cooling obtain water white distillate.Because the wood of different sources, the composition and the content of bamboo vinegar liquid band look are not quite similar, the chamber test is selected by experiment above-mentioned scope planted agent for the optimal addn of hydrogen peroxide.

Example is measured earth kiln brownish black bamboo vinegar liquid successively and is added respectively in 8 250ml triangular flasks from burner reddish-brown bamboo vinegar liquid, each add-on is 150ml, the amount shown in the table 1 of pressing again adds 30% aqueous hydrogen peroxide solution in each bottle, jolting mixes, left standstill 2 hours, move on the electric furnace and connect condenser and add thermal distillation, steam to debris and account for till about 20%, that takes off distillate is subjected to the liquid bottle, measure the absorbancy of each distillate sample with 721 type photo-electro-spectrophotometers, measurement result is still listed in table 1.

Comparative example is according to the specification sheets operation of 02136544 patent application, in the distillate of same sample earth kiln bamboo vinegar liquid, press different ratios and add sulphite, respectively fill a prescription the respectively colourity of treatment solution is got its best for adding the sample of 2% V-Brite B.

The data of table 1 aqueous hydrogen peroxide solution laboratory refined bamboo vinegar gather

Stock liquid	H ₂O ₂Content %	Absorbancy			PH value	Dissolved tar %	Total acid %
		Absorbancy						360	420	460
		Earth kiln	20	0.09				360	420	460	0.016	0.006	2.1	0.02	2.73
Earth kiln	2	Earth kiln	20	0.09	0.095	0.012	0.002	2.3	0.01	3.32	0.016	0.006	2.1	0.02	2.73
Earth kiln	2	Earth kiln	1	0.127	0.095	0.012	0.002	2.3	0.01	3.32	0.01	0.003	2.5	0.01	3.77
Earth kiln	0.5	Earth kiln	1	0.127	0.31	0.006	0.001	2.2	0.01	3,80	0.01	0.003	2.5	0.01	3.77
Earth kiln	0.5	Earth kiln	Reference examples	0.77	0.31	0.006	0.001	2.2	0.01	3,80	0.1	0.057		2.5※	3.25
From burner	5	Earth kiln	Reference examples	0.77	0.28	0.055	0.032	2.0	0.01	4.39	0.1	0.057		2.5※	3.25
From burner	5	From burner	2	0.62	0.28	0.055	0.032	2.0	0.01	4.39	0.015	0.002	2.0	0.01	4.06
From burner	1	From burner	2	0.62	0.78	0.06	0.025	2.01	0.01	3.97	0.015	0.002	2.0	0.01	4.06
From burner	1	From burner	0.5	0.77	0.78	0.06	0.025	2.01	0.01	3.97	0.04	0.009	2.0	0.01	4.06

※ comprises the amount of the sulphite of interpolation according to the dissolved tar measuring method in this numerical value.

One of advantage of present method is to discolor thoroughly, certain earth kiln raw liquid of bamboo vinegar is chocolate, only add stoste volume 0.5～2%, concentration and be 30% aqueous hydrogen peroxide solution vibration mixed number minute, left standstill 2 hours, distillation then, the absorbancy (extinction of distilled water is as 0) when measuring distillate and under wavelength 420nm, being standard with distilled water, as shown in table 1, the absorbancy of this distillate is no more than 0.02, and adopts the reference examples solution absorbance that mixes sulphite process up to 0.1; Two of the advantage of present method is that quality is pure, the hydrogen peroxide that adds is only elementary composition by hydrogen and two kinds of oxygen, very easily discharge ecosystem oxygen and other material reacts, self is reduced into water, no any other residue, and in the end operation also will be distilled reactant, the product distillate impurity content that obtains is extremely low, dissolved tar content only 0.01%, the finishing operation of sulphite process is that sulphite is added in the distillate by contrast, make some coloring matter be reduced into colorless substance, and himself remains in the solution all the time with reaction product, dissolved tar content is up to 2.5%; Three of the advantage of present method is that prescription is simple, does not need several chemical are joined in all proportions; Four of the advantage of present method is that cost reduces, and aqueous hydrogen peroxide solution belongs to mass-produced conventional chemical product, and market price is lower than several sulphite.

Embodiment uses method of the present invention very simple on producing, earlier processed wood, bamboo vinegar liquid are added in the reactor of belt stirrer, add aqueous hydrogen peroxide solution (ratio is selected) again in 0.5～20% scope, starting agitator stirred 10～20 minutes, then leave standstill certain hour, for example 2 hours, then it is pumped into be distilled in the distillation plant debris less than charging capacity 20% till, collected distillate is highly refined wood, the bamboo vinegar liquid of the inventive method.

Claims

1, wood, bamboo vinegar liquid purified method, it is characterized in that: in colored wood, bamboo vinegar liquid, add and count 0.1～20% aqueous hydrogen peroxide solution by processed liquid weight or meausurement, leave standstill certain hour at normal temperature or under heating after the stirring, and then distill, condensation and cooling obtain water white distillate.

2, wood according to claim 1, bamboo vinegar liquid purified method, it is characterized in that: colored wood, bamboo vinegar liquid comprise: the stoste of (1) wood, bamboo vinegar liquid, (2) colored wood, bamboo vinegar liquid distillate.