CN106366062A - Chlorination reaction method in maltol production - Google Patents
Chlorination reaction method in maltol production Download PDFInfo
- Publication number
- CN106366062A CN106366062A CN201610750938.4A CN201610750938A CN106366062A CN 106366062 A CN106366062 A CN 106366062A CN 201610750938 A CN201610750938 A CN 201610750938A CN 106366062 A CN106366062 A CN 106366062A
- Authority
- CN
- China
- Prior art keywords
- chlorination
- furfuryl alcohol
- methanol
- hydrochloric acid
- maltol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D309/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings
- C07D309/34—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
- C07D309/36—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with oxygen atoms directly attached to ring carbon atoms
- C07D309/40—Oxygen atoms attached in positions 3 and 4, e.g. maltol
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention relates to a maltol preparation method, and particularly relates to a chlorination reaction method in maltol production. The method comprises the following steps: a, pumping a 55% methanol water solution into a chlorination kettle, and performing circulation cooling; b, preparing a furfuryl alcohol and methanol mixed solution according to a volume ratio of 1:1; and c, when the temperature of the chlorination kettle is reduced to -15 DEG C, starting to dropwisely add the furfuryl alcohol and methanol mixed solution, simultaneously dropwisely adding hydrochloric acid and oxydol into the kettle continuously, and reacting, wherein the dropwise addition volume ratio of the furfuryl alcohol and methanol mixed solution to the hydrochloric acid to the oxydol is 24:24:12. By using the hydrochloric acid and the oxydol instead of chlorine gas to participate in chlorination reaction, the great hazard source of chlorine gas is eliminated, and meanwhile, the pollution caused by the chlorine gas to the environment is reduced, so that the conversion rate of a chlorination section is improved, and the economic benefits can be increased.
Description
Technical field:
The present invention relates to the preparation method of maltol, a kind of chlorination reaction method in producing particularly to maltol.
Background technology:
During existing maltol produces, chlorine is used in chlorination reaction step as dominant response raw material, because chlorine is that have
Malicious harmful gass, are major hazard sources in a production process, if reveal or react aborning not exclusively to cause environment
Pollution, forms larger potential safety hazard.
Content of the invention:
Present invention aim to solving in existing chlorination reaction using environmental pollution caused by chlorine, the asking of potential safety hazard
Topic, the chlorination reaction method in a kind of maltol production providing.
The technical solution used in the present invention is as follows:
A kind of chlorination reaction method in maltol production, comprises the following steps:
A, content is 55% methanol aqueous solution, squeeze into chlorination tank and be circulated cooling,
B, by volume example configure the mixed liquor of furfuryl alcohol and methanol for 1:1,
C, it is down to -15 DEG C when chlorination tank temperature, start the mixed liquor of Deca furfuryl alcohol and methanol, being simultaneously added dropwise content is 30% salt
Acid and content continuously enter kettle reaction for 35% hydrogen peroxide, and Deca volume ratio is the mixed liquor of furfuryl alcohol and methanol: hydrochloric acid: hydrogen peroxide=
24:24:12..
Chlorination reaction of the present invention utilizes hydrochloric acid and hydrogen peroxide reaction to produce chlorine, uses liquid chlorine before substituting.Instead
Answer equation: 2hcl+h2o2=2h2o+cl2.
The invention has the advantages that:
Replace with hydrochloric acid and hydrogen peroxide chlorine to participate in chlorination reaction, not only eliminate this major hazard source of chlorine, reduce simultaneously
Chlorine pollution on the environment, improves chlorination workshop section conversion ratio, and can increase economic efficiency.
Specific embodiment:
The methanol aqueous solution 2000l of formulation content 55% in a, chlorination tank,
B, furfuryl alcohol and methanol mixed solution enter head tank, methanol and furfuryl alcohol ratio 1:1, respectively join 180kg,
C, head tank complex salt acid 250kg, content is 30%；
Hydrogen peroxide 120kg joined by d, head tank, and content is 35%；
After e, chlorination tank dispensing, kettle temperature is chilled to and is less than -15 DEG C, starts Deca furfuryl alcohol and methanol mixed solution, hydrochloric acid, dioxygen
Water, ratio is 24l;24l:12l, every 30 minutes and record once, drip reacting temperature was less than -8 DEG C, until dropwise reaction is complete
Become.
The effect explanation of embodiment
A, new technology reaction produce conversion ratio and participated in this reaction production conversion ratio with liquid chlorine in the past, and two conversion results improve
2%.
B, efficient and convenient when operator operate, liquid chlorine needed to change (liquid chlorine is to be filled with 1 ton of steel cylinder) and changed steel in the past
Bottle is that have part chlorine can spill this environment, uses gaseous state liquid chlorine pressure to adjust very difficult simultaneously, now uses hydrogen peroxide
It is all liquid with hydrochloric acid, adjusted easily with fluid flowmeter.
This reaction is mainly solution liquid chlorine to environment, eliminates this Chemical Manufacture one major hazard source of liquid chlorine.With
Hydrogen peroxide and hydrochloric acid substitute liquid chlorine, it is possible to reduce environmental pollution, eliminate production scene one major hazard source simultaneously, solve liquid chlorine and give
Production scene and environment cause the problems such as potential safety hazard and environmental pollution, protect our production scene and social ring further
Border.
Claims (1)
1. the chlorination reaction method during maltol produces, comprises the following steps:
A, content is 55% methanol aqueous solution, squeeze into chlorination tank and be circulated cooling,
B, by volume example configure the mixed liquor of furfuryl alcohol and methanol for 1:1,
C, it is down to -15 DEG C when chlorination tank temperature, start the mixed liquor of Deca furfuryl alcohol and methanol, being simultaneously added dropwise content is 30% salt
Acid and content continuously enter kettle reaction for 35% hydrogen peroxide, and Deca volume ratio is the mixed liquor of furfuryl alcohol and methanol: hydrochloric acid: hydrogen peroxide=
24:24:12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610750938.4A CN106366062A (en) | 2016-08-30 | 2016-08-30 | Chlorination reaction method in maltol production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610750938.4A CN106366062A (en) | 2016-08-30 | 2016-08-30 | Chlorination reaction method in maltol production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106366062A true CN106366062A (en) | 2017-02-01 |
Family
ID=57904129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610750938.4A Pending CN106366062A (en) | 2016-08-30 | 2016-08-30 | Chlorination reaction method in maltol production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106366062A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060821A (en) * | 2010-12-23 | 2011-05-18 | 安徽金禾实业股份有限公司 | Chlorination method and device used in ethyl maltol production |
| CN102391229A (en) * | 2011-09-07 | 2012-03-28 | 安徽金禾实业股份有限公司 | Ethyl maltol chlorination continuous production method and device |
| CN102584693A (en) * | 2012-02-09 | 2012-07-18 | 苏州雅本化学股份有限公司 | Preparation method for high purity 2-chlorine-3-aminopyridine hydrochloride |
| CN103497172A (en) * | 2013-10-15 | 2014-01-08 | 连云港宏业化工有限公司 | Synthetic method of 2-chlorothiophene |
-
2016
- 2016-08-30 CN CN201610750938.4A patent/CN106366062A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060821A (en) * | 2010-12-23 | 2011-05-18 | 安徽金禾实业股份有限公司 | Chlorination method and device used in ethyl maltol production |
| CN102391229A (en) * | 2011-09-07 | 2012-03-28 | 安徽金禾实业股份有限公司 | Ethyl maltol chlorination continuous production method and device |
| CN102584693A (en) * | 2012-02-09 | 2012-07-18 | 苏州雅本化学股份有限公司 | Preparation method for high purity 2-chlorine-3-aminopyridine hydrochloride |
| CN103497172A (en) * | 2013-10-15 | 2014-01-08 | 连云港宏业化工有限公司 | Synthetic method of 2-chlorothiophene |
Non-Patent Citations (1)
| Title |
|---|
| 穆旻等: "麦芽酚和乙基麦芽酚的合成及其在食品工业中的应用", 《中国食品学报》 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170201 |