发明名称 |
METHOD FOR PRODUCING HUMIC ACID SALTS |
摘要 |
Humic acid salts are produced, with a high output of useful products, by a liquid-phase oxidation of the mixture of an alkaline agent with a lignin-containing plant raw material having the total content of dry substances of 12-20 %, said oxidation being carried out in two stages. In a first stage, pre-oxidation is carried out at a temperature of 50-190 DEG C and a pressure of 0.5-3 MPa associated with simultaneous treatment with an oxygen-containing gas until a pH of 10.5-12 is reached. The second stage, i.e. oxidation is carried out in the similar conditions at a temperature of 170-200 DEG C until a pH of 8.5-10 is reached. The by-product of cellulose production by a sulphite process, i.e. concentrated solutions of lignosulphonate or lignin is used as a lignin-containing plant raw material, said lignin being a by-product of hydrolysis production being continuously oxidised by air oxygen in two stages. In order to additionally activate the mixture of the raw material with alkali, operating in cavitation mode, a circulation pump provided with an ejector for stream ejection of air is used. In order to reduce the pre-oxidation time, the first stage can be carried out using peroxide, or by supplying the raw material and alkali directly to a pipeline prior to an ejector and the mixture thereof with an oxidising agent.
|
申请公布号 |
WO03051962(A1) |
申请公布日期 |
2003.06.26 |
申请号 |
WO2002RU00533 |
申请日期 |
2002.12.16 |
申请人 |
OBSCHESTVO S OGRANICHENNOY OTVETSVENNOSTYU "NAUCHNO PROIZVOSTVENNOE OBIEDINENIE "REALIZATSIA EKOLOGICHESKIH TEHNOLOGY";GLADKOV, OLEG ANDREEVICH;POLOSKIN, RODION BORISOVICH;POLYAKOV, YURY JURIEVICH;SOKOLOVA, IRINA VASILIEVNA;SOROKIN, NIKOLAY IVANOVICH;GLEBOV, ALEKSEY VALERIEVICH |
发明人 |
GLADKOV, OLEG ANDREEVICH;POLOSKIN, RODION BORISOVICH;POLYAKOV, YURY JURIEVICH;SOKOLOVA, IRINA VASILIEVNA;SOROKIN, NIKOLAY IVANOVICH;GLEBOV, ALEKSEY VALERIEVICH |
分类号 |
C05F11/00;C05F11/02;C08H99/00;(IPC1-7):C08H5/02;C08H5/00 |
主分类号 |
C05F11/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|