Chloride-free catalyst preparation method
A catalyst, high-temperature activation technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of difficult to completely eliminate the influence of chlorine, and achieve the effect of strong practicability, good catalytic activity and simple method
Inactive Publication Date: 2016-05-11
SHAANXI HI-TECH IND CO LTD
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0006] The preparation method of a chlorine-free CuY catalyst according to the present invention comprises the following steps: (1) repeatedly exchange NaY molecular sieves with 0.5mol / L ammonium nitrate solution twice, each time for 4 hours; 2 Roasting at 400 °C for 4 h under protection to prepare HY molecular sieves; (3) impregnating 5 g of HY or NaY molecular sieves into an equal volume of Cu(N0 3 ) 2 1h in aqueous solution; (4) then dry at 105°C for 2h, in N 2 Activation treatment at 600° C. for 4 h under protection to obtain CuY catalysts with a copper content of 10%, which are CuY-H and CuY-Na, respectively.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a chloride-free catalyst preparation method. The chloride-free catalyst preparation method includes steps: (1) repeatedly exchanging NaY molecular sieves with 0.5mol / L ammonium nitrate solution for two times, wherein each-time exchange is carried out for 4h; (2) calcining for 4h at the temperature of 400 DEG C under the protection of N2 to obtain HY molecular sieves; (3) impregnating 5g of HY or NaY molecular sieves into an equivoluminal Cu(NO3)2 aqueous solution for 1h; (4) drying for 2h at the temperature of 105 DEG C, carrying out high-temperature activating treatment for 4h at the temperature of 600 DEG C under the protection of N2 to obtain chloride-free CuY catalysts including CuY-H and CuY-Na, wherein copper content of the catalysts is 10%. The chloride-free catalyst preparation method is simple, and catalyst products obtained according to the method are high in catalytic activity and practicality.
Description
technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a chlorine-free catalyst. Background technique [0002] The oxidative carbonylation of methanol to dimethyl carbonate fDMCl is an important chemical reaction with very favorable thermodynamics. Atom utilization reaches 80%. At present, the catalysts used for this reaction include CuCl / AC (activated carbon) concave, Wacker-type and other chlorine-containing catalysts, Cu(I), molecular sieves, and solid acid-loaded Cu. Catalysts InI", Cu20, ACㅣ41 and other low-chlorine or chlorine-free catalysts. Among them, Cu(I) / molecular sieve catalysts are one of the hot research catalysts. In previous studies, Cu(I) / molecular sieve catalysts were mostly CuCl and H-type molecular sieve solids Prepared by ion exchange. Anderson et al. prepared Cu(I pus and CufI) / zSM 5 molecular sieve catalysts by solid ion exchange method with CuCl and HX, HZSM 5 molecular sieves, a...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/14
Inventor 王耀斌
Owner SHAANXI HI-TECH IND CO LTD