CN109991113B - Method for rapidly detecting quality of n-butyl acetate for paint production - Google Patents
Method for rapidly detecting quality of n-butyl acetate for paint production Download PDFInfo
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- CN109991113B CN109991113B CN201910182962.6A CN201910182962A CN109991113B CN 109991113 B CN109991113 B CN 109991113B CN 201910182962 A CN201910182962 A CN 201910182962A CN 109991113 B CN109991113 B CN 109991113B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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Abstract
The invention provides a method for quickly detecting the quality of n-butyl acetate for paint production, which belongs to the technical field of raw material detection and comprises the following steps: weighing 0.2 +/-0.02 g of calcium isooctanoate liquid by using a triangular flask in a balance; transferring n-butyl acetate to be detected by using a pipette, slowly dripping the n-butyl acetate into a triangular flask, slowly shaking the triangular flask to dissolve calcium iso-octoate in the n-butyl acetate to be detected, observing appearance change of the mixed liquid, stopping adding the n-butyl acetate to be detected when the mixed liquid is white and turbid, and weighing and recording the adding amount of the n-butyl acetate to be detected; if the addition amount of the n-butyl acetate to be detected is less than 20g, the grade is determined to be unqualified, if the addition amount of the n-butyl acetate to be detected is 20-100g, the grade is determined to be qualified, and if the addition amount of the n-butyl acetate to be detected is more than 100g, the grade is determined to be superior. The invention has simple operation, low cost and high detection speed.
Description
Technical Field
The invention belongs to the technical field of raw material detection, and particularly relates to a method for quickly detecting the quality of n-butyl acetate for paint production.
Background
N-butyl acetate, abbreviated as butyl acetate. Colorless and transparent liquid with pleasant fruity odor. The lower homologues are poorly soluble in water; is mixed and dissolved with organic solvents such as alcohol, ether, ketone and the like, is an excellent organic solvent, and is widely used in industries such as paint, curing agent, polyester resin and the like. The calcium iso-octoate is light yellow transparent liquid, is dissolved in ether and is slightly soluble in ethanol, has the advantages of stable acid value, stable molecular weight, light color and good drying effect, and is mainly used as a drier of paint and an accelerant of unsaturated polyester resin. When the quality of raw material n-butyl acetate is poor, the quality problem that the product is white and yellow when calcium isooctanoate is added in the later period and used as a drier of paint and an accelerator of unsaturated polyester resin can occur, the calcium isooctanoate can be used in the production of paint, the calcium isooctanoate can easily react with other substances to cause the phenomenon that the paint is white and yellow, experiments show that the acid value in the n-butyl acetate is increased, the phenomenon that the paint is white and yellow can occur in the normal use process of the paint, and the phenomenon that the paint is white and turbid can occur after a certain amount of acetic acid is added into the n-butyl acetate and is mixed and dissolved with the calcium isooctanoate. The whitening and yellowing of the product can be caused by various factors, such as the fact that the acid value range of n-butyl acetate does not meet the requirement, certain ions react with calcium isooctanoate, and the like, and the items cannot be detected one by one in the actual production, otherwise, the time and the labor are consumed.
Disclosure of Invention
The invention aims to provide a method for rapidly detecting the quality of n-butyl acetate for paint production, which is simple to operate, low in cost and high in detection speed, aiming at the defects of the prior art.
The invention provides the following technical scheme:
a method for rapidly detecting the quality of n-butyl acetate for paint production comprises the following steps:
s1, weighing 0.2 +/-0.02 g of calcium isooctanoate liquid in a balance by using a triangular flask, and returning the balance to zero;
s2, transferring the n-butyl acetate to be detected by a pipette, slowly dripping the n-butyl acetate into a triangular flask, slowly shaking the triangular flask to dissolve calcium iso-octoate in the n-butyl acetate to be detected, observing appearance change of the mixed liquid, stopping adding the n-butyl acetate to be detected when the mixed liquid is white and turbid, and weighing and recording the addition amount of the n-butyl acetate to be detected;
and S3, judging quality, namely judging that the n-butyl acetate quality test is unqualified if the addition amount of the n-butyl acetate to be detected is less than 20g, judging that the n-butyl acetate quality test is qualified if the addition amount of the n-butyl acetate to be detected is 20-100g, and judging that the n-butyl acetate quality test is superior if the addition amount of the n-butyl acetate to be detected is more than 100 g.
Preferably, the balance precision in S1 is 0.01 g.
Preferably, the volume of the triangular flask in the S1 is 250 mL.
Preferably, the calcium isooctanoate liquid is analytically pure.
The invention has the beneficial effects that: the method comprises the steps of dropwise adding n-butyl acetate to be detected into calcium isooctanoate by adopting simple experimental instruments such as a balance, a triangular flask, a pipette and the like, weighing the content of the n-butyl acetate to be detected when the mixed liquid is observed to be white and turbid, and then judging the mass of the n-butyl acetate according to the weighing value, wherein the mass refers to whether the acid value range meets the requirement or not and whether certain ions reacting with the calcium isooctanoate exist or not.
Detailed Description
Example 1
A method for rapidly detecting the quality of n-butyl acetate for paint production comprises the following steps:
s1, weighing 0.2 +/-0.02 g of calcium isooctanoate liquid (analytically pure) in a balance with the accuracy of 0.01g by using a 250mL triangular flask, and zeroing the balance;
s2, transferring the n-butyl acetate to be detected by a pipette, slowly dripping the n-butyl acetate into a triangular flask, slowly shaking the triangular flask to dissolve calcium iso-octoate in the n-butyl acetate to be detected, observing appearance change of the mixed liquid, stopping adding the n-butyl acetate to be detected when the mixed liquid is white and turbid, and weighing and recording the addition amount of the n-butyl acetate to be detected;
and S3, judging quality, namely judging that the n-butyl acetate quality test is unqualified if the addition amount of the n-butyl acetate to be detected is less than 20g, judging that the n-butyl acetate quality test is qualified if the addition amount of the n-butyl acetate to be detected is 20-100g, and judging that the n-butyl acetate quality test is superior if the addition amount of the n-butyl acetate to be detected is more than 100 g.
Example 2
Taking a bottle of n-butyl acetate raw material for quality detection, wherein the detection method comprises the following steps: in a balance with an accuracy of 0.01g, 0.2 + -0.02 g of calcium isooctanoate liquid (analytically pure) is weighed by a 250mL triangular flask, and the balance is zeroed; transferring n-butyl acetate to be detected by using a pipette, slowly dripping the n-butyl acetate into a triangular flask, slowly shaking the triangular flask to dissolve calcium isooctanoate in the n-butyl acetate to be detected, observing appearance change of the mixed liquid, and judging the quality test of the n-butyl acetate in the bottle as the quality test of the n-butyl acetate if the color of the mixed solution is not changed when the addition amount of the n-butyl acetate to be detected is 150g (more than 100 g).
Example 3
Taking the n-butyl acetate in the embodiment 2, dropwise adding acetic acid into the n-butyl acetate to ensure that the mass content of the acetic acid reaches 0.1 percent, and taking the acetic acid as a sample to be detected to carry out quality detection. The detection method comprises the following steps: in a balance with an accuracy of 0.01g, 0.2 + -0.02 g of calcium isooctanoate liquid (analytically pure) is weighed by a 250mL triangular flask, and the balance is zeroed; and transferring a sample to be tested by using a pipette, slowly dripping the sample into a triangular flask, slowly shaking the triangular flask to dissolve calcium isooctanoate in the sample to be tested, observing appearance change of the mixed liquid, stopping adding the sample to be tested when the mixed liquid is white and turbid, weighing the addition of the sample to be tested to be 19g, and judging the quality test of the sample to be tested to be unqualified.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A method for rapidly detecting the quality of n-butyl acetate for paint production is characterized by comprising the following steps:
s1, weighing 0.2 +/-0.02 g of calcium isooctanoate liquid in a balance by using a triangular flask, and returning the balance to zero with the balance accuracy of 0.01 g;
s2, transferring the n-butyl acetate to be detected by a pipette, slowly dripping the n-butyl acetate into a triangular flask, slowly shaking the triangular flask to dissolve calcium iso-octoate in the n-butyl acetate to be detected, observing appearance change of the mixed liquid, stopping adding the n-butyl acetate to be detected when the mixed liquid is white and turbid, and weighing and recording the addition amount of the n-butyl acetate to be detected;
and S3, judging quality, namely judging that the n-butyl acetate quality test is unqualified if the addition amount of the n-butyl acetate to be detected is less than 20g, judging that the n-butyl acetate quality test is qualified if the addition amount of the n-butyl acetate to be detected is 20-100g, and judging that the n-butyl acetate quality test is superior if the addition amount of the n-butyl acetate to be detected is more than 100 g.
2. The method for rapidly detecting the quality of the n-butyl acetate for paint production as claimed in claim 1, wherein the volume of the triangular flask in S1 is 250 mL.
3. The method for rapidly detecting the quality of n-butyl acetate for paint production as claimed in claim 1, wherein the calcium isooctanoate liquid is analytically pure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910182962.6A CN109991113B (en) | 2019-03-12 | 2019-03-12 | Method for rapidly detecting quality of n-butyl acetate for paint production |
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| CN201910182962.6A CN109991113B (en) | 2019-03-12 | 2019-03-12 | Method for rapidly detecting quality of n-butyl acetate for paint production |
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| CN109991113A CN109991113A (en) | 2019-07-09 |
| CN109991113B true CN109991113B (en) | 2022-05-13 |
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| CN111272896B (en) * | 2020-03-04 | 2022-12-13 | 泰兴金江化学工业有限公司 | Method for detecting content of hexacarboxaldehyde in n-propanol serving as n-propyl acetate raw material |
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| CN103602268B (en) * | 2013-10-10 | 2015-09-02 | 中钞油墨有限公司 | Environment-friendly type siccative and ink composite thereof |
| CN103740241A (en) * | 2013-11-04 | 2014-04-23 | 安庆菱湖涂料有限公司 | Automobile plate spring anticorrosive priming paint and preparation method thereof |
| CN107991425B (en) * | 2017-12-07 | 2020-04-10 | 长春人民药业集团有限公司 | Detection method of traditional Chinese medicine composition for treating traumatic injury |
| CN108680457A (en) * | 2018-07-16 | 2018-10-19 | 佛山奎丰商务咨询服务有限公司 | Harmful substance contents detection method in a kind of paint |
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