CN1133737C

CN1133737C - Cassia oil extracting process from cassia twig and leaf

Info

Publication number: CN1133737C
Application number: CNB01127865XA
Authority: CN
Inventors: 沈雪荣; 张永森
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-09-18
Filing date: 2001-09-18
Publication date: 2004-01-07
Anticipated expiration: 2021-09-18
Also published as: CN1347971A

Abstract

The present invention discloses a method for extracting cassia oil from cassia twigs and leaves, which comprises the following steps: cassia twigs and leaves are loaded into two distillatory kettles; then steam is sprayed into the bottom of the first distillatory kettle to enable the top of the first distillatory kettle to output mixed steam which is then input into the bottom of the second distillatory kettle; then the mixed steam is output from the top of the second distillatory kettle to a first stage redistilled kettle as the heat source of distilled distillate; a pump is started, and distilled water separated from an oil water separator is conveyed to a preheater for preheating; then the preheated water is conveyed to the first stage redistilled kettle to be redistilled; finally, all the mixed steam from the first stage redistilled kettle is cooled by a condenser and then conveyed to the oil water separator for water oil separation. The method of the present invention has the advantages of high oil yield, little required equipment investment and convenient operation.

Description

A kind of method by Chinese cassia tree branch, leaf extracted Gui oil

The present invention relates to a kind of method by cinnamomic branch, leaf extracted Gui oil.

Chinese cassia tree belongs to Lauraceae, and aiphyllium is abounded with in some places of China South China.Oil of bay is to use cinnamomic branch, leaf through distillable volatile oil, has strong aromatic odour, and main component is a cinnamic aldehyde, pale brown look liquid, proportion (20 ℃) 1.050～1.070, refractive index (20 ℃) 1.602～1.614.Oil of bay is the traditional exporting of China, in the production history in existing more than 100 year of China.The eighties was continued to use the rural area produced in conventional processes in the past always, from just progressively applicable industry production of the early 1990s.But in still-process, because of the too high distillate serious emulsification that is directed at of pressure, temperature of operation, promptly have so-called " water-in-oil " phenomenon in liquid, and influence oil yield, according to surveying and determination, the oleaginousness of the distillate after water-and-oil separator separates is about 0.25%.At present, most manufacturers all adopt the method for heating up in a steamer distillate again to be reclaimed, but higher because of distillation temperature, generally more than 115 ℃, the pyrolysis of oil of bay, hydrolysis are also bigger, so oil yield does not improve, still rest on below 0.6%.

The purpose of this invention is to provide a kind of new cassia twig, the method for leaf extracted Gui oil, this method oil yield height, required equipment less investment, easy and simple to handle.

Method by Chinese cassia tree branch, leaf extracted Gui oil provided by the invention may further comprise the steps:

(1) the Chinese cassia tree branch, leaf is respectively charged into the interior cover of two still pots, then water vapour is sprayed into the bottom of first still pot, Chinese cassia tree branch in it, oil of bay in the leaf is steamed by water vapour, mixing steam is imported the bottom of second still pot again through the output of the top of first still pot, Chinese cassia tree branch in it, oil of bay in the leaf is also steamed together, mixing steam exports the first step to and heats up in a steamer the thermal source that pot is made the distillation distillate again through the top of second still pot, the first step is heated up in a steamer the mixing steam that comes out at pot top again through condenser condenses, cooling, distillate enters water-and-oil separator and carries out oily water separation;

(2) above-mentioned steps is after several minutes, and ejector priming is transported to the preheater preheating with the isolated water that distillates in the water-and-oil separator, and then is input into the first step and heats up in a steamer pot again and carry out multiple distillation;

(3) at last the first step is heated up in a steamer again pot all mixing steams that come out through condenser condenses, cooling, be input into water-and-oil separator then and carry out oily water separation, oil of bay is sunken to the bottom;

(4) after distillation finishes, the first step is heated up in a steamer in the pot residue waste liquid again transport to first still pot, heat up in a steamer once back discharging when carrying out again again in distillation next time.

The type of heating that the first step of the present invention is heated up in a steamer pot distillation distillate again can adopt steam direct injection heat transfer type or steam coils indirect heat transfer mode.

Distillation temperature is 102～113 ℃ in first and second still pot of the present invention, and pressure is 0.01～0.06MPa; The distillation temperature that the first step is heated up in a steamer in the pot again is 100～105 ℃, and pressure is 0～0.03MPa; Whole process distillation time once is 80～100 minutes.

For Chinese cassia tree branch, leaf are evenly distributed in order to distillation when packing still pot into, cinnamomic branch, leaf are processed into the specification that length is about 5cm, exempt from immersion.

The present invention has following characteristics by the method for Chinese cassia tree branch, leaf extracted Gui oil:

1, owing to made full use of the waste heat of steam, add that cassia twig, leaf exempt from immersion, waste leaf pulp humidity is little, more helps burning, efficiently solves the fuel problem of boiler, and treatment capacity is doubled, and working efficiency has also improved nearly one times, and power consumption has reduced four one-tenth.

2, owing to the significantly reduction of distillation temperature, so the rate of recovery of oil of bay is greatly improved, oil yield has improved 70～90%, remarkable in economical benefits.

3, facility investment is few and easy and simple to handle, just increase one-level and heat up in a steamer respectively cover of pot and still pot again on the basis of original traditional process equipment, and water-and-oil separator is reduced to present one by original tens.

The present invention is further illustrated below in conjunction with drawings and Examples.

Fig. 1 is a treatment scheme synoptic diagram of the present invention, and dotted line is a vapour line among the figure, and solid line is the mixed solution pipeline.

As shown in Figure 1, the method by Chinese cassia tree branch, leaf extracted Gui oil provided by the invention may further comprise the steps:

(1) at first with the cinnamomic branch, leaf is processed into the specification that length is about 5cm, exempt from immersion, then the Chinese cassia tree branch, leaf is respectively charged into still pot 1,2 interior cover, again water vapour is sprayed into the bottom of still pot 1, Chinese cassia tree branch in it, oil of bay in the leaf is steamed by water vapour, mixing steam is imported the bottom of still pot 2 again through the output of the top of still pot 1, Chinese cassia tree branch in it, oil of bay in the leaf is also steamed together, mixing steam exports the first step to and heats up in a steamer the thermal source that pot 3 is made the distillation distillate again through the top of still pot 2, the distillation distillate add thermal recovery steam direct injection heat transfer type or steam coils indirect heat transfer mode, the first step is heated up in a steamer the mixing steam that comes out of pot 3 tops again through condenser 4 condensations, cooling, distillate enters water-and-oil separator 5 and carries out oily water separation;

(2) above-mentioned steps is after 5 minutes, and ejector priming 6 is transported to preheater 7 preheatings with the isolated water that distillates in the water-and-oil separator 5, and then is input into the first step and heats up in a steamer pot again and 3 carry out multiple distillation;

(3) at last the first step is heated up in a steamer again pot 3 all mixing steams that come out through condenser 4 condensations, cooling, be input into water-and-oil separator 5 then and carry out oily water separation, oil of bay is sunken to the bottom;

(4) after distillation finishes,, after distillation finishes, the first step is heated up in a steamer in the pot 3 residue waste liquid again transport to still pot 1, heat up in a steamer once back discharging when carrying out again again in distillation next time because the first step heats up in a steamer again and still have a small amount of high boiling point oil of bay not steamed in pot residue waste liquid.

Because the volatility of oil of bay is stronger, responsive to heat, in still-process, temperature controlling becomes an important link, and temperature is high more, and oil yield and quality are just poor more.Therefore, must reduce distillation temperature as much as possible in operation.According to the vapor distillation principle as can be known: during the oil-water mixture boiling, the bubble of steam passes liquid, forms space one by one in liquid layer, and the oil of bay component is just to these space volatilizations, and overflow with bubble, so only need satisfying normal pressure, the wet distillation temperature of oil of bay gets final product for about 100 ℃.

Following table is that Luoding City, Guangdong Province nasal mucus synthetic fibre Rong Xing spice oil factory adopts the inventive method extraction oil of bay and traditional method for extracting oil of bay under same cases such as treatment capacity, raw materials quality and distillation time, the synopsis of other parameter:

Project	Traditional method			The inventive method
	Traditional method			The inventive method			Air pressure	Temperature	Oil yield	Air pressure	Temperature	Oil yield
	MPa	℃	％	MPa	℃	％	Air pressure	Temperature	Oil yield	Air pressure	Temperature	Oil yield
	MPa	℃	％	MPa	℃	％	Still pot 1	0.05～0.08	110～117	0.5～0.6 spring cassia twig leaf	0.02～0.06	103～113	0.9～1 spring cassia twig leaf
Still pot 2			0.1～0.04	102～108			Still pot 1	0.05～0.08	110～117		0.02～0.06	103～113
Still pot 2			0.1～0.04	102～108	Heat up in a steamer pot 3 again			0.6～0.7 autumn cassia twig leaf	0～0.03		100～105	1.2～1.4 autumn cassia twig leaves
					Heat up in a steamer pot 3 again				0～0.03		100～105

Claims

1, a kind of method by Chinese cassia tree branch, leaf extracted Gui oil may further comprise the steps:

(1) the Chinese cassia tree branch, leaf is respectively charged into two still pots (1,2) interior cover, then water vapour is sprayed into the bottom of first still pot (1), Chinese cassia tree branch in it, oil of bay in the leaf is steamed by water vapour, mixing steam is imported the bottom of second still pot (2) again through the output of the top of first still pot (1), Chinese cassia tree branch in it, oil of bay in the leaf is also steamed together, mixing steam exports the first step to and heats up in a steamer the thermal source that pot (3) is made the distillation distillate again through the top of second still pot (2), the first step is heated up in a steamer the mixing steam that comes out of pot (3) top again through condenser (4) condensation, cooling, distillate enters water-and-oil separator (5) and carries out oily water separation; Wherein distillation temperature is 102～113 ℃ in first and second still pot (1,2), and pressure is 0.01～0.06MPa, and the distillation temperature that the first step is heated up in a steamer in the pot (3) again is 100～105 ℃, and pressure is 0～0.03MPa;

(2) above-mentioned steps is after several minutes, and ejector priming (6) is transported to preheater (7) preheating with the isolated water that distillates in the water-and-oil separator (5), and then be input into the first step heat up in a steamer again the pot (3) carry out multiple distillation;

(3) at last the first step is heated up in a steamer again all mixing steams of coming out of pot (3) through condenser (4) condensation, cooling, be input into water-and-oil separator (5) then and carry out oily water separation, oil of bay is sunken to the bottom;

(4) whole process distillation time once is 80～100 minutes, after distillation finishes, the first step is heated up in a steamer the middle residue waste liquid of pot (3) again transport to first still pot (1), heats up in a steamer once back discharging when carrying out again again in distillation next time.

2, the method by Chinese cassia tree branch, leaf extracted Gui oil according to claim 1 is characterized in that: the type of heating that the first step is heated up in a steamer distillation distillate in the pot again conducts heat for the steam direct injection.

3, the method by Chinese cassia tree branch, leaf extracted Gui oil according to claim 1 is characterized in that: the type of heating that the first step is heated up in a steamer distillation distillate in the pot again is the steam coils indirect heat transfer.

4, according to each described method of claim 1～3, it is characterized in that: cinnamomic branch, leaf are processed into the specification that length is 5cm, exempt from immersion by Chinese cassia tree branch, leaf extracted Gui oil.