CN109970532A - A kind of paraformaldehyde additives used for producing - Google Patents
A kind of paraformaldehyde additives used for producing Download PDFInfo
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- CN109970532A CN109970532A CN201910338418.6A CN201910338418A CN109970532A CN 109970532 A CN109970532 A CN 109970532A CN 201910338418 A CN201910338418 A CN 201910338418A CN 109970532 A CN109970532 A CN 109970532A
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- parts
- paraformaldehyde
- additive
- additives used
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/86—Use of additives, e.g. for stabilisation
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a kind of paraformaldehyde additives used for producing, the additive, and based on parts by weight, including 0.5~1.5 part of liquid alkaline, 3~9 parts of methenamine, 1.5~4.5 parts of triethylamine, additive amount are ten a ten thousandth parts~one thousandth part.Using additive prepared by the present invention, the moisture in paraformaldehyde can be effectively removed, improve formaldehyde dewatering speed and adjusts the degree of polymerization, while being conducive to accelerate the rate of dissolution of finished product paraformaldehyde in water.
Description
Technical field
The present invention relates to a kind of paraformaldehyde additives used for producing, belong to paraformaldehyde additive technology field.
Background technique
Paraformaldehyde is solid-state formaldehyde made of a kind of formaldehyde dehydrating polycondensation, is widely used in chemical field, is such as synthesized
Pesticide, synthetic resin, coating, fungicide, fumigant, herbicide etc., different field require difference to the depolymerization of paraformaldehyde,
As depolymerization time of the pesticide industry to paraformaldehyde does not require.Resin industry requires the depolymerization of paraformaldehyde, and the depolymerization time is wanted
Fastly, also require depolymehzation process gentle.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of additives that paraformaldehyde depolymerization can be improved.
In order to solve the above technical problems, the technical solution adopted by the present invention are as follows:
A kind of paraformaldehyde additives used for producing, the additive, based on parts by weight, including 0.5~1.5 part of liquid alkaline,
3~9 parts of methenamine, 1.5~4.5 parts of triethylamine, additive amount are ten a ten thousandth parts~one thousandth part.
Further, the additive includes 1.0~1.2 parts of liquid alkaline, 6~7 parts of methenamine, 3~4 parts of triethylamine.
Further, the additive includes 1 part of liquid alkaline, 6 parts of methenamine, 3 parts of triethylamine.
Further, the additive amount is 4/10000ths parts~6/10000ths parts.
Further, the additive amount is 5/10000ths parts.
Further, the liquid alkaline concentration is 30~45%.
Advantageous effects of the invention: poly can be effectively removed by the alkaline combined additive of the addition present invention
Moisture in formaldehyde improves formaldehyde dewatering speed and adjusts the degree of polymerization, while being conducive to accelerate finished product paraformaldehyde in water
Rate of dissolution.
Specific embodiment
The invention will be further described below.Following embodiment is only used for clearly illustrating technical side of the invention
Case, and not intended to limit the protection scope of the present invention.
Embodiment 1
Paraformaldehyde is prepared using spray-on process, following additive, the additive, with parts by weight is added in polymerization
Meter, including 1 part of liquid alkaline, 6 parts of methenamine, 3 parts of triethylamine, the additive amount of additive are 5/10000ths parts.The wherein liquid alkaline
Concentration is 32%.
Embodiment 2
Paraformaldehyde is prepared using spray-on process, following additive, the additive, with parts by weight is added in polymerization
Meter, including 1 part of liquid alkaline, 6 parts of methenamine, 3 parts of triethylamine, the additive amount of additive are ten a ten thousandth parts.The wherein liquid
Alkali concentration is 32%.
Embodiment 3
Paraformaldehyde is prepared using spray-on process, following additive, the additive, with parts by weight is added in polymerization
Meter, including 1 part of liquid alkaline, 6 parts of methenamine, 3 parts of triethylamine, the additive amount of additive are one thousandth part.The wherein liquid alkaline
Concentration is 32%.
Comparative example 1
Paraformaldehyde is prepared using spray-on process, compared with embodiment 1, difference is, does not add additive in polymerization.
Comparative example 2
Paraformaldehyde is prepared using spray-on process, compared with embodiment 1, difference is, additive only includes liquid alkaline, additive
Additive amount be 5/10000ths parts.Wherein the liquid alkaline concentration is 32%.
Comparative example 3
Paraformaldehyde is prepared using spray-on process, compared with embodiment 1, difference is, additive only includes methenamine, adds
The additive amount for adding agent is 5/10000ths parts.
Comparative example 4
Paraformaldehyde is prepared using spray-on process, compared with embodiment 1, difference is, additive only includes triethylamine, addition
The additive amount of agent is 5/10000ths parts.
Paraformaldehyde 30g prepared by the Examples 1 to 3 and comparative example 1~4 for weighing equivalent, is placed in 150mL flask, adds
Enter 50mL distilled water, be sufficiently stirred, be heated to 50 DEG C, after reacting 1h, observes liquid case in flask,
As a result as follows: embodiment 1 is fully transparent, and paraformaldehyde depolymerization is complete, 2 substantially transparent of embodiment, more than paraformaldehyde
A small amount of non-depolymerization, embodiment 3 is substantially opaque, since alkalinity is excessively high, reduces formaldehyde yield, and generate indissoluble object, comparative example 1
Muddiness causes paraformaldehyde depolymerization incomplete since reaction speed is slow, and comparative example 2, comparative example 4, comparative example 3 are more and more transparent,
But comparative example 2, comparative example 4, comparative example 3 are ineffective compared to embodiment 1.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of paraformaldehyde additives used for producing, characterized in that the additive, based on parts by weight, including liquid alkaline 0.5~
1.5 parts, 3~9 parts of methenamine, 1.5~4.5 parts of triethylamine, additive amount are ten a ten thousandth parts~one thousandth part.
2. a kind of paraformaldehyde additives used for producing according to claim 1, characterized in that the additive includes liquid alkaline
1.0~1.2 parts, 6~7 parts of methenamine, 3~4 parts of triethylamine.
3. a kind of paraformaldehyde additives used for producing according to claim 2, characterized in that the additive includes liquid alkaline
1 part, 6 parts of methenamine, 3 parts of triethylamine.
4. a kind of paraformaldehyde additives used for producing according to claim 1, characterized in that the additive amount be ten thousand/
Four parts~6/10000ths parts.
5. a kind of paraformaldehyde additives used for producing according to claim 4, characterized in that the additive amount be ten thousand/
Five parts.
6. a kind of paraformaldehyde additives used for producing according to claim 1, characterized in that the liquid alkaline concentration be 30~
45%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910338418.6A CN109970532A (en) | 2019-04-25 | 2019-04-25 | A kind of paraformaldehyde additives used for producing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910338418.6A CN109970532A (en) | 2019-04-25 | 2019-04-25 | A kind of paraformaldehyde additives used for producing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109970532A true CN109970532A (en) | 2019-07-05 |
Family
ID=67086322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201910338418.6A Pending CN109970532A (en) | 2019-04-25 | 2019-04-25 | A kind of paraformaldehyde additives used for producing |
Country Status (1)
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| CN (1) | CN109970532A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1793097A (en) * | 2005-12-21 | 2006-06-28 | 太原市塑料研究所 | Process for preparing polymeric formal |
| CN101845130A (en) * | 2010-06-04 | 2010-09-29 | 烟台万华聚氨酯股份有限公司 | Method for preparing paraformaldehyde |
| CN104130360A (en) * | 2014-07-21 | 2014-11-05 | 江苏凯茂石化科技有限公司 | Process for producing paraformaldehyde |
| CN105399612A (en) * | 2015-11-19 | 2016-03-16 | 安徽中源化工有限公司 | Technology for producing paraformaldehyde from formaldehyde with concentration of 37% |
| CN106699536A (en) * | 2017-01-12 | 2017-05-24 | 湖北泰盛化工有限公司 | Preparation method of anhydrous formaldehyde alcohol solution and device |
| CN206467169U (en) * | 2017-01-12 | 2017-09-05 | 湖北泰盛化工有限公司 | A kind of device for preparing anhydrous formaldehyde alcoholic solution |
| CN206958604U (en) * | 2017-05-08 | 2018-02-02 | 无锡熙源工程技术有限公司 | One kind is used for paraformaldehyde additive steady flow system |
| CN109265632A (en) * | 2018-09-12 | 2019-01-25 | 重庆大学 | A kind of preparation method of paraformaldehyde |
-
2019
- 2019-04-25 CN CN201910338418.6A patent/CN109970532A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1793097A (en) * | 2005-12-21 | 2006-06-28 | 太原市塑料研究所 | Process for preparing polymeric formal |
| CN101845130A (en) * | 2010-06-04 | 2010-09-29 | 烟台万华聚氨酯股份有限公司 | Method for preparing paraformaldehyde |
| CN104130360A (en) * | 2014-07-21 | 2014-11-05 | 江苏凯茂石化科技有限公司 | Process for producing paraformaldehyde |
| CN105399612A (en) * | 2015-11-19 | 2016-03-16 | 安徽中源化工有限公司 | Technology for producing paraformaldehyde from formaldehyde with concentration of 37% |
| CN106699536A (en) * | 2017-01-12 | 2017-05-24 | 湖北泰盛化工有限公司 | Preparation method of anhydrous formaldehyde alcohol solution and device |
| CN206467169U (en) * | 2017-01-12 | 2017-09-05 | 湖北泰盛化工有限公司 | A kind of device for preparing anhydrous formaldehyde alcoholic solution |
| CN206958604U (en) * | 2017-05-08 | 2018-02-02 | 无锡熙源工程技术有限公司 | One kind is used for paraformaldehyde additive steady flow system |
| CN109265632A (en) * | 2018-09-12 | 2019-01-25 | 重庆大学 | A kind of preparation method of paraformaldehyde |
Non-Patent Citations (2)
| Title |
|---|
| 杨明菊等: "多聚甲醛的生产工艺及技术进展", 《四川化工》 * |
| 杨科岐等: "最新喷雾干燥法制备多聚甲醛工艺", 《煤炭加工与综合利用》 * |
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Application publication date: 20190705 |