SU889648A1

SU889648A1 - Method of producing urea-formaldehyde suspension

Info

Publication number: SU889648A1
Application number: SU792777914A
Authority: SU
Inventors: Вера Израильевна Мееровская; Аделина Ефимовна Кузнецова; Федор Михайлович Гриценко; Юлия Георгиевна Тен; Мира Израильевна Слюдникова
Original assignee: Предприятие П/Я А-1676
Priority date: 1979-04-25
Filing date: 1979-04-25
Publication date: 1981-12-15

Description

II

Изобретение относитс к производству удобрений и может быть использовано при получении мочевино- ормальдегидной суспензии в производстве одинарных и сложньпс удобрений.The invention relates to the production of fertilizers and can be used in the preparation of a urea-formaldehyde suspension in the production of single and complex fertilizers.

Известен способ получени мочевино-формальдегидной суспензии, где дл ее стабилизации ввод т уреазу в количестве 0,1-0,2% от веса мочевины l .A method of producing a urea-formaldehyde suspension is known, where in order to stabilize it, urease is introduced in an amount of 0.1-0.2% by weight of urea l.

Недостатком известного способа вл етс дороговизна стабилизирующего агента, который готовитс из бобовых сем н, кроме того, сама уреаза устойчива лишь в течение суток , после чего разлагаетс .The disadvantage of this method is the high cost of the stabilizing agent, which is prepared from bean seeds, besides, the urease itself is stable only for a day, after which it decomposes.

Наиболее близким к изобретению вл етс способ получени устойчивости суспензии мочевино-формальдегидной смолы и удобрени . Сущность способа заключаетс в том, что в высококонцентрированный раствор мочевины добавл ют неорганическую щелочь в количестве, достаточномClosest to the invention is a method for obtaining a stability of a suspension of a urea-formaldehyde resin and fertilizer. The essence of the method is that an inorganic alkali is added to a highly concentrated solution of urea in an amount sufficient

дл поддержани рН на уровне не /4енее 10, затем добавл ют формальдегид и смесь нагревают до 85С или выше в течение 5 мин C2jtto maintain the pH at a level no less than 10, then formaldehyde is added and the mixture is heated to 85 ° C or higher for 5 minutes. C2jt

Недостатком данного способа вл етс то, что суспензи в основном состоит из триметилентетрамочевины , содержание метилендимочевины незначительно, вследствие чего готовый продукт имеет зани10 женную растворимость и низкий козффициент усво емости продукта.The disadvantage of this method is that the suspension mainly consists of trimethylentetraurea, the content of methylenedibrea is insignificant, as a result of which the finished product has an inherent solubility and low coefficient of absorption of the product.

Цель изобретени - повышение содержани метилендимочевины, раствоts римости и козффициента усво емости готового продукта.The purpose of the invention is to increase the content of methylenediburea, the solution content and the coefficient of absorption of the finished product.

Поставленна цель достигаетс путем взаимодействи -мочевины с формальдегидом в присутствии стабили20 затора - глауконитовой породы.The goal is achieved by the interaction of urea with formaldehyde in the presence of a stabilizer-glauconitic rock.

Claims

At the same time, glauconitic rock is introduced in the amount of 5-10% by weight of the finished product. Glauconite rock - natural mineral containing,%: ClO up to 10, silica 50-52, iron oxide 25, aluminum oxide 60, magnesium oxide 3.0, titanium 0.1, manganese 0.02, copper 0.1, zinc 0.013, moisture 2-4. Example 1. Urea-formaldehyde suspension is prepared; to calculate the molar ratios of urea: formaldehyde (M: F) 1.7: 1 and the addition of glauconite rock in an amount of 5% by weight of the finished product. For this, 100 g of urea 10 g of glauconite rock (which is / 5 wt.% | Of the weight of the finished product, T1 is thoroughly mixed and 82 ml of formaldead solution is added to a laboratory reactor at a temperature of ambient air (t) 20 ° C) a specific gravity of 1.09, containing 380 g / l of formaldehyde. After thoroughly mixing the reagents and dissolving urea, the pH of the mixture is 6.9. The solution remains stable for 24 hours and then gradually hardens. Example 2. Urea-formal dehydrating suspension is prepared from calculation of the molar ratios of urea formal dehyd (M: F 1.7: 1 and additives of glauconitic rock 10% by weight of the finished product. At a laboratory temperature at ambient temperature (t), 100 g of j urea, 20 g of glauconitic rock, which is 10% by weight of the finished The mixture was thoroughly mixed, then 82 ml of formaldehyde solution with a specific gravity of () 1.09 containing 380 g / l of formaldehyde was added. After thoroughly mixing the reagents and dissolving the urea, the pH of the mixture reached 8.5. The resulting solution is stable for 48 hours, after which the product solidifies. The advantage of introducing glaucoquite rock as a stabilizer is an improvement in the quality of the product, since the product contains mostly methyl enceate 72-80%, which leads to an increase in the absorption coefficient compared to the known method by 17.9-22.7%. In addition, the product is enriched with trace elements and K? 0, which play an important role in the vital activity of plants. The quality indicators of the final product obtained as a result of using the glauconitic rock as a stabilizer and the final product obtained by a known method are listed in the table. Proposed with the addition of glauconite equal to the claims 1. Method for obtaining a urea-formaldehyde suspension by reacting urea with formaldehyde in the presence of a stabilizer, characterized in that glauconite porositum is used as a stabilizer . 2. A method according to claim I, characterized in that the glauconitic rock is introduced in an amount of 5-10% by weight of the finished product. Sources of information taken into account during the examination 1. USSR author's certificate No. 477986, cl. C 05 C 9/02, 1973.

2. Japanese patent number 45-12247, CP. 4 About 15, - 1970.