1 Scope
This standard specifies the requirements, test methods, inspection rules, packaging, marking, storage and transport of molecular sieve 4A.
This standard is applicable to spherical and strip products of molecular sieve 4A, raw molecular sieve powder of molecular sieve 4A and activated molecular sieve powder of molecular sieve 4A, and is mainly used for drying various chemical gases and liquids, refrigerants, medicines, electronic materials and automobile braking systems.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test methods
GB/T 6286 Determination of bulk density for molecular sieve
GB/T 6287 Determination of static adsorbed water for molecular sieve
GB/T 6288 Determination of particle size for granular molecular sieve
GB/T 6679-2003 General rules for sampling solid chemical products
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 14563 Specification and test method of Kaolin clay
HG/T 2783 Test methods for crushing strength of molecular sieve
3 Term
For the purposes of this standard, the following term and definition apply.
3.1
molecular sieve 4A
molecular sieve whose framework with silica-alumina ratio being about 2, valid pore diameter of 4?, and molecular formula of Na2O?Al2O3?2SiO2?4?〖1/2〗H2O
Foreword i
1 Scope
2 Normative references
3 Term
4 Requirements
5 Test method
6 Inspection rules
7 Packaging, marking, storage and transport
