Molecular sieve coating slurry for integral catalyst and method thereof

The invention relates to a molecular sieve catalyst, in particular to molecular sieve coating slurry for a monolithic catalyst and a preparation method of the molecular sieve coating slurry. The molecular sieve coating slurry comprises a molecular sieve, polyacrylamide, hydroxymethyl cellulose, acidic silica sol and water; wherein in the molecular sieve coating slurry, the mass ratio of a molecular sieve to water is 1: (1-2.3), and the mass ratio of the acidic silica sol to water is 1: (3-6). The molecular sieve catalyst slurry provided by the invention solves the problems of fast sedimentation, unstable viscosity, easy hole blocking, low adhesive force, long and complex technical process, narrow window and the like. 本发明涉及分子筛催化剂，尤其涉及一种整体式催化器用分子筛涂层浆料及其方法。分子筛涂层浆料包括：分子筛、聚丙烯酰胺、羟甲基纤维素、酸性硅溶胶和水；其中，所述分子筛涂层浆料中，分子筛与水的质量比为1:(1-2.3)，酸性硅溶胶与水的质量比为1:(3-6)。本发明分子筛催化剂浆料解决了沉降快、粘度不稳定、易堵孔、附着力较低以及工艺过程又长又复杂且窗口较窄等问题。