Process for preparation of urea autocondensation product专利检索-反刍动物畜牧业专利检索查询-专利查询网

Process for preparation of urea autocondensation product

阅读：750发布：2022-01-02

专利汇可以提供Process for preparation of urea autocondensation product专利检索，专利查询，专利分析的服务。并且Urea is pyrolyzed under controlled temperature conditions of from about 110* to about 210*C. in the presence of a polyether carrier liquid to provide an autocondensation product mass rich in biuret and having a low residual content of unconverted urea. Other autocondensation pyrolyzates, less desired in the product when it is used as a protein supplement for ruminant feeds, are co-produced only in low tolerable amounts.，下面是Process for preparation of urea autocondensation product专利的具体信息内容。

权利要求

1. A PROCESS FOR PREPARING A BIURET PRODUCT WHICH COMPRISES: PROVIDING A REACTION MIXTURE OF UREA IN A GLYCOL DIETHER CARRIER LIQUID, THE RELATIVE PROPORTIONS OF UREA TO DIETHER ON A WEIGHT BASIS RANGING FROM ABOUT 90:10 TO ABOUT 10:90, SAID GLYCOL DIETHER CORRESPONDING TO THE FORMULA R''-O-R-O-NR" WHEREIN R IS ETHYL OR PROPYL, R'' AND R" ARE ALKYL RADICALS CONTAINING FROM ONE TO FOUR CARBON ATOMS, AND N IS AN INTEGER RANGING FROM ONE TO SIX, SAID ETHERS BEING FURTHER CHARACTERIZED AS HAVING A BOILING POINT OF NO LESS THAN 110*C AND A DENSISTY LESS THAN THAT OF UREA, HEATING SAID REACTION MIXTURE, THEREBY DISSOLVING THE UREA, INITIALLY AT A TEMPERATURE OF FROM ABOVE 150*C TO ABOUT 210*C FOR A PERIOD OF FROM ABOUT 10 MINUTES TO ABOUT 2 HOURS AND COOLING TO A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 115*C TO BELOW 150*C FOR A PERIOD OF TIME WHICH PROVIDES FOR SUBSTANTIAL CONVERSION OF SAID UREA TO A PRODUCT HIGH IN BUIRET WHILE SIMULTANEOUSLY MINIMIZING FORMATION OF OTHER UREA AUTOCONDENSATION BYPRODUCTS, AND CONTACTING THE RESULTING PRODUCT MIXTURE WITH WATER TO PRECIPITATE THE BIURET PRODUCT AND RECOVERING THE SOLID BIURET PRODUCT FROM THE RESIDUAL LIQUID.

2. The process as defined in claim 1 wherein the initial heating of the reaction mixture is at from about 150*C. to about 180*C. and the heating at the lower temperature is at from about 120*C. to about 140*C. for a period of from about 2 to about 6 hours.

3. The process as defined in claim 1 wherein the glycol diether carrier liquid is ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, triethylene glycol dimethyl ether, or tetraethylene glycol dimethyl ether.

4. The process as defined in claim 3 wherein the urea:glycol diether reaction mixture contains on a weight basis from about 20 to about 50 weight percent of the diether.

5. The process as defined in claim 1 wherein the glycol diether is tetraethylene glycol dimethyl ether and the urea:ether reaction mixture contains about 60 weight percent urea and about 40 weight percent of said ether, the reaction mixture being heated for a period of about 30 minutes at about 180*C., cooled to about 150*C. and maintained at this temperature for a period of about 1 hour, cooled to about 140*C. and maintained at this temperature for about 3 1/2 hours, and recovering a biuret rich product.

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Process for preparation of urea autocondensation product

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