CN110699047B - Propylene glycol type cold carrier liquid - Google Patents
Propylene glycol type cold carrier liquid Download PDFInfo
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- CN110699047B CN110699047B CN201810747458.1A CN201810747458A CN110699047B CN 110699047 B CN110699047 B CN 110699047B CN 201810747458 A CN201810747458 A CN 201810747458A CN 110699047 B CN110699047 B CN 110699047B
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- propylene glycol
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- carrier liquid
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/20—Antifreeze additives therefor, e.g. for radiator liquids
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- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention provides a propylene glycol type cold carrier liquid, which comprises the following components in percentage by weight: 30-50% of propylene glycol, 0.5-5% of sodium phytate, 0.1-1.5% of sodium benzoate, 0.1-0.5% of maltodextrin and the balance of deionized water. The propylene glycol type cooling liquid is used for a secondary heat exchange system in the food industry, is safe, non-toxic and low in volatility, and can provide excellent anti-corrosion protection for metals such as steel, iron, red copper, brass, cast aluminum, soldering tin and the like in a refrigeration system in the food industry.
Description
Technical Field
The invention relates to a propylene glycol type cold carrier liquid, and belongs to the field of fine chemicals.
Background
The cold carrying liquid is used for transferring the heat of an object to be cooled to an evaporating refrigerant in a refrigerating device working in an indirect cooling mode, the cold carrying liquid is often used for cooling the object to be cooled by replacing a direct refrigerant in a position where the direct refrigerant is not easy to apply or in a special environment where the direct refrigerant cannot be used, and the high-quality cold carrying liquid generally has the characteristics of low freezing point, low viscosity, large specific heat, safety, no toxicity, high thermal conductivity and good corrosion resistance.
The cold carrying liquid for the food industry is widely applied to various links of food production, storage and sale, such as temperature control, a secondary refrigeration house refrigerating system, a secondary cooling system of a large supermarket and the like in food processing, and the non-toxic and low-toxicity cold carrying liquid is preferred for the food industry.
The common cold-carrying liquid comprises ethanol, ethylene glycol and propylene glycol aqueous solution, calcium chloride and sodium chloride aqueous solution, the ethanol cold-carrying liquid has low flash point, is inflammable and explosive, has strong volatility, seriously corrodes metal equipment, the calcium chloride and sodium chloride aqueous solution greatly corrodes the equipment, corrosion control is difficult to be carried out by adding a corrosion inhibitor, the ethylene glycol and the propylene glycol have stable properties and are miscible with water, the aqueous solution of the ethylene glycol and the propylene glycol is usually used as the cold-carrying liquid, the ethylene glycol cold-carrying liquid has the advantages of low freezing point, high boiling point, high flash point and the like, and the propylene glycol cold-carrying liquid has low toxicity compared with the ethylene glycol cold-carrying liquid, and can better meet the requirements of the food industry.
Disclosure of Invention
The invention aims to provide a propylene glycol type cooling liquid, which adopts an environment-friendly non-toxic corrosion inhibitor, can be widely applied to a secondary cooling system in the food industry and avoids pollution caused by leakage.
In order to realize the purpose of the invention, the invention provides a propylene glycol type cooling carrier liquid, which comprises the following components in parts by weight:
preferably, the propylene glycol type cooling carrier liquid comprises the following components in parts by weight:
furthermore, the propylene glycol type cold carrier liquid also comprises a proper amount of deionized water; preferably with deionized water to make up to a total of 100 parts.
The preferred technical scheme of the invention is as follows: the propylene glycol type cooling carrier liquid comprises the following components in percentage by weight based on 100 percent of weight:
the best technical scheme of the invention is as follows: the propylene glycol type cooling carrier liquid comprises the following components in percentage by weight based on 100 percent of weight:
the invention also provides a preparation method of the propylene glycol type refrigerating fluid, which comprises the following steps:
1) adding propylene glycol and water according to the formula ratio into a reaction kettle, stirring and heating to 50-60 ℃;
2) adding sodium phytate, sodium benzoate and maltodextrin in formula amount into a reaction kettle, and stirring until the sodium phytate, the sodium benzoate and the maltodextrin are completely dissolved.
Further, it is to be understood that terms such as "comprising," "including," "containing," and the like, also include "consisting of … …," "consisting of … …," "made of … …," and the like, herein.
All percentages stated in the present invention are by weight unless otherwise specified.
The starting materials of the present invention are commercially available or can be prepared by methods conventional in the art.
The propylene glycol is used as the antifreeze agent of the cold-carrying liquid, so that the freezing point of the cold-carrying liquid is effectively reduced, the boiling point of the cold-carrying liquid is improved, and the LD of the propylene glycol50The value (median lethal dose) is 28000, and the product is an actual nontoxic substance.
The sodium phytate is a pure natural green additive, is rich in carboxyl and hydroxyl, has the properties of ion exchange, adsorption, complexation and the like and good dispersibility, can effectively disperse metal oxides, forms a chemically stable protective film on the surface of metal, shows good scale inhibition, scale dissolution and corrosion inhibition performances, and can effectively prevent the corrosion of metal equipment.
The sodium benzoate is a common ferrous metal corrosion inhibitor, enhances the protection effect of the cooling liquid on steel and cast iron, and also has a certain sterilization effect.
The maltodextrin is also called water-soluble dextrin or enzyme method dextrin, is prepared by using starch corn, rice and the like as raw materials and performing low-degree controlled hydrolysis conversion, purification and drying through an enzyme method process, has no toxicity, good stability and corrosion inhibition performance, and prolongs the service lives of cold-carrying liquid and heat exchange equipment.
The propylene glycol type cold carrier liquid can be prepared by adopting a conventional method in the field, and can be prepared by mixing the components according to the proportion and uniformly stirring.
Compared with the prior art, the propylene glycol type cold carrier liquid has the following advantages and effects:
1. all the raw materials are safe and nontoxic, and the cold-carrying liquid is nontoxic.
2. The glassware corrosion test shows that the cooling liquid has excellent multi-metal protection performance.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
The propylene glycol type cold carrier liquid consists of the following components in percentage by weight:
the components are mixed according to the proportion and stirred evenly.
Example 2
The propylene glycol type cold carrier liquid consists of the following components in percentage by weight:
the components are mixed according to the proportion and stirred evenly.
Example 3
The propylene glycol type cold carrier liquid consists of the following components in percentage by weight:
the components are mixed according to the proportion and stirred evenly.
Example 4
The propylene glycol type cold carrier liquid consists of the following components in percentage by weight:
the components are mixed according to the proportion and stirred evenly.
Comparative example 1
The propylene glycol type cold carrier liquid consists of the following components:
the components are mixed according to the proportion and stirred evenly.
Comparative example 2
The propylene glycol type cold carrier liquid consists of the following components:
the components are mixed according to the proportion and stirred evenly.
Comparative example 3
The propylene glycol type cold carrier liquid consists of the following components:
the components are mixed according to the proportion and stirred evenly.
Experimental example 1
The propylene glycol type cold carrying liquids of examples 1-4 and comparative examples 1-3 of the invention are respectively inspected for the protective performance to metal materials by adopting an SH/T0085 glassware corrosion method, considering that the use temperature of products is generally-20 ℃, the temperature of a glassware corrosion method is controlled at 45 +/-2 ℃, other test conditions are unchanged, and the test piece weight loss requirement refers to the glassware corrosion test requirement in GB 29743-.
TABLE 1 glassware corrosion (45. + -. 2 ℃ C., 336h)
According to table 1, comparative example 1 without maltodextrin has obvious weight loss of glassware corrosion test piece, cast iron weight loss can not meet the established requirements, comparative example 2 with sodium phytate content increased independently has obvious weight loss improvement of glassware corrosion test piece compared with comparative example 1, but the weight loss of cast iron test piece still can not meet the established requirements, and comparative example 3 without sodium phytate has no weight loss of glassware corrosion steel test piece and cast iron test piece; in examples 1 to 4 containing sodium phytate and maltodextrin, weight loss of each metal test piece after corrosion of glassware meets the established requirements, and weight loss of each test piece is far lower than that of a comparative example, so that the sodium phytate and maltodextrin have good synergistic corrosion inhibition effect.
The glassware corrosion test result shows that the cooling liquid has excellent corrosion inhibition performance on metal and can meet the use requirement of the cooling liquid.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (7)
1. The propylene glycol type cold carrier liquid is characterized by comprising the following components in parts by weight:
2. the propylene glycol type coolant carrier according to claim 1, comprising the following components in parts by weight:
3. the propylene glycol-based coolant carrier according to claim 1 or 2, further comprising deionized water; the deionized water is used for complementing to 100 parts of the total amount.
4. The propylene glycol type cooling carrier fluid according to claim 1 or 2, which comprises the following components in percentage by weight:
5. the propylene glycol type cooling carrier fluid according to claim 1 or 2, which comprises the following components in percentage by weight:
6. the propylene glycol type coolant carrier fluid according to claim 1, which is characterized by comprising the following components in percentage by weight:
or the propylene glycol type cold carrier liquid consists of the following components in percentage by weight:
or the propylene glycol type cold carrier liquid consists of the following components in percentage by weight:
or the propylene glycol type cold carrier liquid consists of the following components in percentage by weight:
7. a process for the preparation of a propylene glycol-based coolant carrier according to any one of claims 4 to 6, comprising the steps of:
1) adding propylene glycol and water according to the formula ratio into a reaction kettle, stirring and heating to 50-60 ℃;
2) adding sodium phytate, sodium benzoate and maltodextrin in formula amount into a reaction kettle, and stirring until the sodium phytate, the sodium benzoate and the maltodextrin are completely dissolved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810747458.1A CN110699047B (en) | 2018-07-09 | 2018-07-09 | Propylene glycol type cold carrier liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810747458.1A CN110699047B (en) | 2018-07-09 | 2018-07-09 | Propylene glycol type cold carrier liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110699047A CN110699047A (en) | 2020-01-17 |
| CN110699047B true CN110699047B (en) | 2021-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810747458.1A Active CN110699047B (en) | 2018-07-09 | 2018-07-09 | Propylene glycol type cold carrier liquid |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718693A (en) * | 2020-07-01 | 2020-09-29 | 秦丹志 | Energy conversion liquid |
| CN115124977A (en) * | 2022-02-22 | 2022-09-30 | 河北工业大学 | Antifreezing solution prepared from products obtained after vacuum distillation of coal-to-ethylene glycol byproducts |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1227322C (en) * | 2002-08-13 | 2005-11-16 | 白松泉 | Industrial heat transfer medium |
| CN102585781B (en) * | 2012-01-04 | 2013-12-25 | 十堰福波新材料有限公司 | Environment-friendly engine trying liquid |
| CN102533230B (en) * | 2012-01-17 | 2014-04-16 | 北京蓝星科技有限公司 | Coolant liquid for magnesium aluminum alloy engine and preparation method of the same |
| CN102899669A (en) * | 2012-10-23 | 2013-01-30 | 鞍钢股份有限公司 | Antirust agent for cold-rolled steel sheet in cold-rolling process |
| CN104388058B (en) * | 2014-10-21 | 2017-07-04 | 朝阳光达化工有限公司 | The two-way temperature refrigerating medium wide of low viscosity ultralow temperature |
| CN105154027B (en) * | 2015-07-15 | 2018-07-20 | 朝阳光达化工有限公司 | A kind of industrial cold-carrying agent |
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