CN104193577A - Method for generating dihydromyrcene by cracking pinane - Google Patents
Method for generating dihydromyrcene by cracking pinane Download PDFInfo
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- CN104193577A CN104193577A CN201410396797.1A CN201410396797A CN104193577A CN 104193577 A CN104193577 A CN 104193577A CN 201410396797 A CN201410396797 A CN 201410396797A CN 104193577 A CN104193577 A CN 104193577A
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Abstract
The invention discloses a method for generating dihydromyrcene by cracking pinane. The method comprises the following steps: performing vacuum vaporization on a pinane mixture containing more than 97% of pinane, mixing nitrogen with a gas generated after the pinane mixture is vaporized according to the volume ratio of 1:(1-5), preheating the mixed gas, performing cracking reaction on the preheated gas through a cracking pipe, carrying out two-level cooling on the crackate to form liquid, wherein a catalyst layer is arranged on the inner wall of the cracking pipe, and the temperature of the cracking pipe is 350-500DEG C, the vacuum degree of the vacuum vaporization ranges from -0.075MPa to -0.098MPa, and the vaporization temperature is 80DEG C-110DEG C, the mixing temperature is 90DEG C-120DEG C, and the preheating temperature is 120DEG C-250DEG C. According to the method, the problems that the existing dihydromyrcene production energy consumption is high and the yield is low can be solved.
Description
Technical field
The present invention relates to pinane deep process technology field, especially a kind of pinane cracking generates the method for dihydromyrcene.
Background technology
Along with China is to utilizing turps to extract going deep into of compound essence research, the downstream user demand of dihydromyrcene constantly increases, and demand also constantly increases.The energy consumption height of producing dihydromyrcene is perplexing the production cost of dihydromyrcene always, is also restricting the production cost of derived product.When existing enterprise is used pinane cracking to generate dihydromyrcene product, reactant is added to cracking in scission reaction device, the general required temperature of cracking up to 550 ℃～650 ℃, energy consumption is very high, output can not improve always, tooling cost is higher.Through repetition test for many years, the factors such as catalyzed reaction and temperature are made to continuous change, analyze its reason, find that the temperature of carrying out scission reaction can reduce by 100 ℃～150 ℃ in the situation that catalyzer exists, cracking product out all can reach standard-required.
Summary of the invention
Problem to be solved by this invention is to provide a kind of method that pinane cracking generates dihydromyrcene, high to solve the production energy consumption of existing dihydromyrcene, the problem yielding poorly.
In order to address the above problem, technical scheme of the present invention is: the method that the cracking of this pinane generates dihydromyrcene comprises the following steps: by pinane content, be that more than 97% pinane mixture carries out vacuum vaporization, the ratio that by nitrogen is by volume 1:1～5 is mixed with the gas generating after described pinane mixture vaporization, the gas being mixed to get is carried out to preheating, gas after preheating carries out scission reaction by cracking tube, and split product is through the cooling formation liquid of two-stage; Described cracking tube inwall is provided with catalyst layer, cracking tube temperature: 350 ℃～500 ℃; The vacuum tightness of described vacuum vaporization :-0.075MPa～-0.098 MPa, vaporization temperature: 80 ℃～110 ℃; Mixing temperature: 90 ℃～120 ℃, preheating temperature: 230 ℃～250 ℃.
In technique scheme, more specifically scheme can be: described catalyst layer is zeolite [molecular sieve; The temperature of described cracking tube is axially divided into three temperature sections successively along body: 350 ℃～400 ℃, 400 ℃～460 ℃, 460 ℃～500 ℃; The vacuum tightness of described cracking tube :-0.075Mpa～-0.098Mpa.
Owing to having adopted technique scheme, the present invention compared with prior art has following beneficial effect:
Present method has been improved technique, and adopt certain cracking temperature and vacuum degree control, add on cracking tube inwall catalyst layer is set, catalyst layer is provided with catalyzer, catalyzer by cracking tube figure layer has certain katalysis to lysate pinane, adds certain temperature and vacuum tightness requirement, can finely must reduce cracking temperature and also all reach the object of synthesizing dihydro myrcene, save energy consumption, improved production efficiency.
Embodiment
Below by embodiment, the invention will be further described:
Embodiment mono-:
Use present method processing dihydromyrcene, carry out according to the following steps: the pinane mixture that is 98.1% by 110 grams of pinane content is put into vaporizer, start to vacuumize, heat; Vacuum degree control is at-0.075Mpa～-0.085MPa, Heating temperature to 110 ℃, controls the material being evaporated in vaporizer for 30 minutes, forms pinane gas, pinane gas enters in mixing tank and mixes with 5 times of nitrogen to pinane gas volume, and mixing temperature is controlled at 90 ℃; Enter afterwards preheater and carry out preheating, in preheater, mixed gas reaches 250 ℃, then mixed gas enters in the cracking tube of catalyst layer under the situation of vacuum, and the catalyzer in its catalyst layer is entered in mixed gas, and the catalyst layer is here zeolite [molecular sieve; The temperature of cracking tube is axially divided into three temperature sections successively along body, and the some temperature measuring respectively at the point for measuring temperature of these three temperature section settings is 365 ℃, 400 ℃, 460 ℃, the vacuum tightness of cracking tube :-0.075Mpa.Cracking tube material is out cooled to 50 ℃ of following dihydromyrcenes that form 100 grams of liquid acquisitions through two-stage.Dihydromyrcene is analyzed: pinane content is: 13.6%, and dihydromyrcene content is: 60.82%, transformation efficiency is 86.1%, selectivity is: 72%.
Embodiment bis-:
Use present method processing dihydromyrcene, carry out according to the following steps: the pinane mixture that is 97.6% by 530 grams of pinane content is put into vaporizer, start to vacuumize, heat; Vacuum degree control is at-0.08Mpa～-0.09MPa, Heating temperature to 90 ℃, controls the material being evaporated in vaporizer for 90 minutes, forms pinane gas, pinane gas enters in mixing tank and mixes with 3 times of nitrogen to pinane gas volume, and mixing temperature is controlled at 100 ℃; In preheater, mixed gas reaches 240 ℃, then mixed gas enters in the cracking tube of catalyst layer under the situation of vacuum, catalyzer in its catalyst layer is entered in mixed gas, the temperature of cracking tube is axially divided into three temperature sections successively along body, three some temperature that measure respectively at the point for measuring temperature of these three temperature section settings are 400 ℃, 460 ℃, 485 ℃, the vacuum tightness of cracking tube :-0.085Mpa.Cracking tube material is out cooled to 50 ℃ of following dihydromyrcenes that form 500 grams of liquid acquisitions through two-stage.Dihydromyrcene is analyzed: pinane content is: 13.3%, and dihydromyrcene content is: 60.12%, transformation efficiency is 86.3%, selectivity is: 71.3%.
Embodiment tri-:
Use present method processing dihydromyrcene, carry out according to the following steps: the pinane mixture that is 97.8% by 1580 grams of pinane content is put into vaporizer, start to vacuumize, heat; Vacuum degree control is at-0.09Mpa～-0.098MPa, Heating temperature to 80 ℃, controls the material being evaporated in vaporizer for 150 minutes, forms pinane gas, pinane gas enters in mixing tank and mixes with the nitrogen of pinane gas same volume, and mixing temperature is controlled at 120 ℃; In preheater, mixed gas reaches 230 ℃ not within the scope of the claims, then mixed gas enters in the cracking tube of catalyzer figure layer under the situation of vacuum, catalyzer in its catalyst layer is entered in mixed gas, the temperature of cracking tube is axially divided into three temperature sections successively along body, the point temperature measuring respectively at the point for measuring temperature of these three temperature section settings is 350 ℃, 445 ℃, 500 ℃, the vacuum tightness of cracking tube :-0.098Mpa.Cracking tube material is out cooled to 50 ℃ of following dihydromyrcenes that form 1500 grams of liquid acquisitions through two-stage.Dihydromyrcene is analyzed: pinane content is: 12.7%, and dihydromyrcene content is: 60.92%, transformation efficiency is 87%, selectivity is: 71.6%.
Claims (2)
1. a pinane cracking generates the method for dihydromyrcene, it is characterized in that comprising the following steps: by pinane content, be that more than 97% pinane mixture carries out vacuum vaporization, the ratio that by nitrogen is by volume 1:1～5 is mixed with the gas generating after described pinane mixture vaporization, the gas being mixed to get is carried out to preheating, gas after preheating carries out scission reaction by cracking tube, and split product is through the cooling formation liquid of two-stage;
Described cracking tube inwall is provided with catalyst layer, cracking tube temperature: 350 ℃～500 ℃; The vacuum tightness of described vacuum vaporization :-0.075MPa～-0.098 MPa, vaporization temperature: 80 ℃～110 ℃; Mixing temperature: 90 ℃～120 ℃, preheating temperature: 230 ℃～250 ℃.
2. the method for pinane catalytic pyrolysis synthesizing dihydro myrcene according to claim 1, is characterized in that: described catalyst layer is zeolite [molecular sieve; The temperature of described cracking tube is axially divided into three temperature sections successively along body: 350 ℃～400 ℃, 400 ℃～460 ℃, 460 ℃～500 ℃; The vacuum tightness of described cracking tube :-0.075Mpa～-0.098Mpa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410396797.1A CN104193577A (en) | 2014-08-13 | 2014-08-13 | Method for generating dihydromyrcene by cracking pinane |
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| CN201410396797.1A CN104193577A (en) | 2014-08-13 | 2014-08-13 | Method for generating dihydromyrcene by cracking pinane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113336617A (en) * | 2021-06-04 | 2021-09-03 | 浙江正荣香料有限公司 | Method for generating myrcene by cracking beta-pinene |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891578A (en) * | 2010-08-10 | 2010-11-24 | 福州大学 | A new method for producing dihydromyrcene |
| CN103232314A (en) * | 2013-05-10 | 2013-08-07 | 江苏宏邦化工科技有限公司 | Method for synthesizing dihydromyrcene by performing catalytic cracking on pinane |
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2014
- 2014-08-13 CN CN201410396797.1A patent/CN104193577A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891578A (en) * | 2010-08-10 | 2010-11-24 | 福州大学 | A new method for producing dihydromyrcene |
| CN103232314A (en) * | 2013-05-10 | 2013-08-07 | 江苏宏邦化工科技有限公司 | Method for synthesizing dihydromyrcene by performing catalytic cracking on pinane |
Non-Patent Citations (3)
| Title |
|---|
| 刘旦初等: "蒎烷催化异构制取二氢月桂烯", 《精细化工》 * |
| 毛丽秋等: "蒎烷热裂解中反应规律的考察(Ⅰ)", 《湖南师范大学自然科学学报》 * |
| 黄智贤等: "蒎烷裂解管式反应器二维模拟", 《计算机与应用化学》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113336617A (en) * | 2021-06-04 | 2021-09-03 | 浙江正荣香料有限公司 | Method for generating myrcene by cracking beta-pinene |
| CN113336617B (en) * | 2021-06-04 | 2022-05-24 | 浙江正荣香料有限公司 | Method for generating myrcene by cracking beta-pinene |
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Application publication date: 20141210 |