CN102134472A

CN102134472A - Preparation method of environmentally-friendly snow and ice melting agent

Info

Publication number: CN102134472A
Application number: CN2010101010125A
Authority: CN
Inventors: 李汉江
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-01-26
Filing date: 2010-01-26
Publication date: 2011-07-27

Abstract

The invention provides a preparation method of an environmentally-friendly snow and ice melting agent, which contains the following components in percent by weight: 30 to 50% of industrial grade postassium acetate, 20 to 30% of industrial grade urea, 3 to 8% of industrial grade sodium tripolyphosphate, 5 to 25% of industrial grade potassium nitrate, 0.5 to 2% of ion-type surfactant and 2 to 6% of sodium metasilicate anhydrous. The snow and ice melting agent prepared according to the method provided by the invention accords with the local standards of a snow smelting agent established by Beijing Bureau of Quality and Technical Supervision. Practice proves that the using effect is excellent.

Description

A kind of preparation method of environment-friendly snowmelt ice-melt agent

The invention belongs to chemical method and prepare snow melt ice-melt agent, belong to the environmentfriendly products class.

Snow Agent is human at heavy snow weather, is a kind of chemical agent easily that ensures traffic safety, The coast is clear adopts.Facts have proved that this is a kind of can will ice or the quick effective means of melting of snow.Snow Agent can fast snow melting cardinal principle be based on the reduction freezing point.As everyone knows, salt just can reduce the freezing point of water, thereby early stage Snow Agent is a base-material with salt exactly.But the consequent is, give nature and ecology has caused immeasurable loss with the salt snow melting: a snow day salting makes snow-broth become salt solution, and the strong brine that made the trees of periphery and lawn and crop absorption very easily produces disease; Form behind the soil absorption salt solution and harden, directly destroyed the growth of plant; Road and bridge, steel construction be easily by brine corrosion, or the like.Therefore, a large amount of facts have proved, with Snow Thawing in Salty Water and ice, its evil is far longer than profit.

At present commercially available Snow Agent mostly is base-material (sodium chloride content≤70%) with salt, some producer even all promote to market at a low price as Snow Agent with Industrial Salt.This has just directly caused being worth higher relatively environment-friendly type product innovation and slowly has been difficult to listing.Trace it to its cause, mainly be to be that the Snow Agent Financial cost of base-material is cheap with salt, and formed use habit for many years, add that the formation of environmental consciousness also also has a process, so just this traditional snow-smelting method is followed.

Neoteric Snow Agent patent is also more, but most of higher chlorion of content that be unable to do without.As: application number: 02149204.2,03109196.2200410021283.4200510054964.5 ... all be to be the Snow Agent of main raw material with calcium chloride, magnesium chloride.Different with traditional sodium-chlor Snow Agent is, they have used different inhibiter, further reduces freezing point by adding alcohols etc., and can play certain corrosion mitigating effect to steel, cement.Yet because these patents have all been used 50～90% calcium chloride, chloride ion content is quite high, thereby can not stop soil knot plate, vegetation is destroyed and steel construction is corroded disastrous effect equally.

Number of patent application be 200510002260.3200510054964.5 to have provided with MEG-alcohol powder and calcium acetate, magnesium acetate be the environment-friendly snowmelt agent of major ingredient, but, can't be promoted veritably in the practice owing to be limited by raw material sources and many effects limit.

The present invention has carried out serious analysis to above-mentioned patent, under the prerequisite of avoiding the existing many drawbacks of Snow Agent, has developed brand-new prescription and technology with effect unique, formed environmental protection, fast, novel Snow Agent easily.Its principle is at first thoroughly to remove the compound of chloride ion-containing, and the Potassium ethanoate that adopts environment-friendly type is as main raw material---Potassium ethanoate is a kind of approximate organic Chemicals, and is water-soluble and can degrade, and the potassium ion of generation can be used as fertilizer the coming year; Add urea in addition, saltpetre plays the corrosion inhibition to steel; The organic assembling of these raw materials not only can be quickened the thawing of ice and snow, and in environment-friendly snowmelt, by the fertilizer effect of nitrogen, potassium, plant is grown more healthy and strongly in the coming year.

Proportioning of the present invention and production technique are as follows: (by weight percentage)

1, Potassium ethanoate technical grade 30～50%;

2, urea industry level 20～30%;

3, tripoly phosphate sodium STPP technical grade 3～8%;

4, saltpetre technical grade 5～25%;

5, ionogenic surfactant 0.5～2%;

6, anhydrous sodium metasilicate 2～6%.

The present invention finishes by following technology: Potassium ethanoate, urea, saltpetre should be dried under≤70 ℃ of conditions, make moisture be lower than 8%; The urea of crystalline structure, saltpetre, anhydrous sodium metasilicate will be worn into the powder below the 2mm in grinding machine; Mixing in mixing machine packs again; Follow-up work is undertaken by Beijing's provincial standard.

List embodiment below:

Produce one ton of environment-friendly snowmelt ice-melt agent by best proportioning, its prescription is:

1, Potassium ethanoate 450kg; (45%)

2, urea 250kg; (25%)

3, tripoly phosphate sodium STPP 50kg; (5%)

4, saltpetre 200kg; (20%)

5, K-12 (sodium lauryl sulphate) 15kg; (1.5%)

6, anhydrous sodium metasilicate 35kg.(3.5％)

Its processing method is as follows: Potassium ethanoate, urea and saltpetre are ground into the 2mm fine powder in the steel mill of 5kW, expose fresh surface, all raw materials are all poured in the stainless steel mixing machine into thorough mixing 20min again.Stop to leave standstill, and in the transparent plastic bag of packing into, outer lining woven bag, the moistureproof preservation.

By product of the present invention, meet Beijing's Quality Supervision Bureau fully and issue provincial standard DB11-/T161-2002 about Snow Agent, the specific performance index is as follows:

Sequence number	Project	Performance index
			1	Smell	There is not undesirable smell
2	Proterties	Solid particle size≤10mm; The liquid homogeneous
			3	Solution colourity, color	Whiteness≤30 degree, colourless or light color
4	The pH value	6.5～9.0
			5	Water-insoluble	≤5％
6	Water ratio	≤ 5% (referring to free-water)
			7	The snow melt ability	90% of 〉=sodium-chlor defrost ability
8	Dissolution rate	The defrost speed of 〉=sodium-chlor
			9	The corrosion of carbon steel test	50% of the corrosion rate of sodium-chlor
10	Toxicological test	Small white mouse test toxicological harmless
			11	Cling property	Damped method≤10%
12	Heavy metal
			13	Water	≤0.05mg/kg
14	Cadmium	≤5mg/kg

15	Chromium	≤50mg/kg
			16	Plumbous	≤50mg/kg
17	Arsenic	≤50mg/kg
			18	The plant salt tolerance test	Plant salt tolerance amount 〉=100g/m ²
19

The Snow Agent Applicable temperature of producing with the present invention is-5 ℃～-30 ℃.Every square metre of consumption is 100～150g, and it is better also can be diluted to the direct spray effect of liquid with 50%-75% water earlier.

Claims

1. environment-friendly snowmelt ice-melt agent is characterized in that this snow melt ice-melt agent fills a prescription as follows by weight: Potassium ethanoate (technical grade) 30～50%;

Urea (technical grade) 20～30%;

Tripoly phosphate sodium STPP (technical grade) 3～8%;

Saltpetre (technical grade) 5～25%;

Ionogenic surfactant 0.5～2%;

Anhydrous sodium metasilicate 2～6%.

2. snow melt ice-melt agent according to claim 1 is characterized in that: lenticular Potassium ethanoate, urea and saltpetre should grind to form the powdery thing earlier before being mixed.