Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
SH/T 1613 consists of the following two parts:
SH/T 1613.1 Petroleum o-xylene - Part 1: Specification;
SH/T 1613.2 Petroleum o-xylene - Part 2: Determination for purity of and impurity of hydrocarbon - Gas chromatography method
This part is developed in accordance with the rules given in GB/T 1.1-2009.
This part replaces SH/T 1613.1-1995 Petroleum o-xylene.
The following main changes have been made with respect to SH/T 1613.1-1995 Petroleum o-xylene:
——the name of this standard is modified;
——indicators such as p-xylene+m-xylene content, cumene content, styrene content and bromine index are added (see Table 1; Clause 3 of Edition 1995);
——definition of total distillation range is added (see Table 1; Clause 3 of Edition 1995);
——"Purity" is changed as "o-xylene content". “Non-aromatic content + C9 aromatics” is changed as "non-aromatic content + content of C9 aromatic or above" (see Table 1; Clause 3 of Edition 1995);
——non-volatile, water-soluble acid-base indicator is deleted (see Table 1; Clause 3 of Edition 1995);
——test methods for total sulfur in SH/T 1820 and SH/T 0689 are added, and SH/T 1820 is used for arbitration test (see Table 1; Clause 3 of Edition 1995).
——sampling and inspection rules are modified (see Clauses 4 and 5; Clause 4 of Edition 1995);
——marking, packaging, transportation and storage are modified (see Clauses 6 and 7; Clause 5 of Edition 1995);
——Annex A “Safety” is added (see Annex A).
This part was proposed by China Petrochemical Corporation.
This part is under the jurisdiction of Subcommittee on Petrochemistry of National Technical Committee on Chemical of Standardization Administration of China (SAC/TC 63/SC4).
The previous edition of this part is as follows:
——SH/T 1613.1-1995.
Petroleum o-xylene - Part 1: Specification
Warning: the production, transportation, storage and use of products specified in this Standard can be hazardous if suitable precautions are not observed. This standard does not purport to address all of the safety concerns, if any, associated with the product. It is the responsibility of the users of this Standard to establish appropriate safety and precaution measures and to determine the applicability of regulatory limitations prior to use.
1 Scope
This part specifies requirements, sampling, inspection rules, marking, labeling, accompanying documents, packaging, transportation and storage of petroleum o-xylene.
This part is applicable to petroleum o-xylene obtained by petroleum refining process, which is mainly used as a raw material for the production of chemical products such as phthalic anhydride, pesticides and solvents.
Molecular structure: C6H4 (CH3)2
Relative molecular mass: 106.16 (in accordance with international relative atomic mass in 2016)
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 normative document (including any amendments) applies.
GB 190 Packing symbol of dangerous goods
GB/T 2012 Aromatic hydrocarbons - Test methods of acid wash
GB/T 3143 Color determination method of liquid chemicals (Hazen unit - Platinum-cobalt scale)
GB/T 3146.1 Industrial aromatic hydrocarbons and related materials - Determination of distillation range - Part 1: Distillation method
GB/T 3723 Sampling of chemical products for industrial use - Safety in sampling
GB/T 6678 General principles for sampling chemical products
GB/T 6680 General rules for sampling solid chemical products
GB 13690 General rule for classification and hazard communication of chemicals
GB 30000.7-2013 Rules for classification and labelling of chemicals - Part 7: Flammable liquids
SH/T 0689 Standard test method for determination of total sulfur in light hydrocarbons motor fuels and oils by ultraviolet fluorescence
SH/T 1147 Aromatic hydrocarbons for industrial use - Determination of trace quantities of sulfur - Microcoulometric method
SH/T 1551 Determination of bromine index of aromatic hydrocarbons - Coulometric titration method
SH/T 1613.2 Petroleum o-xylene – Part 2: Determination of purity of and hydrocarbon impurities - Gas chromatography method
SH/T 1767 Determination of bromine index of aromatic hydrocarbons - Electrometric titration
SH/T 1820 Industrial aromatics - Determination of trace sulfur - Ultraviolet fluorescence method
3 Requirements
The technical requirements and test methods for petroleum o-xylene shall be in accordance with those specified in Table 1.
?
Table 1 Technical requirements and test methods for petroleum o-xylene
No. Item Indicator Test method
Superior product First-grade product
1 Appearance Clear and transparent, without mechanical impurities Visual inspection a
2 Color (platinum-cobalt) / code ≤ 10 20 GB/T 3143
3 O-xylene content w/% ≥ 98.0 95.0 SH/T 1613.2
4 (p-xylene content+meta-xylene content) w/% ≤ 1.3 3.5 SH/T 1613.2
5 Cumene content w/% ≤ 0.3 0.5 SH/T 1613.2
6 (Non-aromatic content + content of C9 aromatic or above) w/% ≤ 1.0 1.5 SH/T 1613.2
7 Styrene content w/% Report SH/T 1613.2
8 Acid-washing colorimetry The color of acid layer shall not be darker than that of the standard solution of 0.15g potassium dichromate per 1000mL dilute acid CB/T 2012
9 Bromine index / (mgBr/100g) ≤ 100 SH/T 1551b
10 Total sulfur content/(mg/kg) ≤ 5 SH/T 1820c
11 Distillation range (below 101.3kPa)/℃
Total distillation range d ≤ 2.0 (including 144.4℃) GB/T 3146.1
a At a temperature of 15~25℃, take 50~60mL sample and put into a clean and dry 100mL colorimeter tube to observe.
b Allow testing according to SH/T 1767. In case of dispute, the test result in SH/T 1551 shall prevail.
c Allow testing according to SH/T 1147 and SH/T 0689. In case of dispute, the test result in SH/T 1820 shall prevail.
d The total distillation range is equal to the temperature of dry point minus the temperature of initial boiling point.
4 Sampling
It’s carried out according to the safety and technical requirements in GB/T 3723, GB/T 6678 and GB/T 6680, and the sampling amount shall meet the requirements for inspection and sample reservation.
5 Inspection rules
5.1 Inspection classification
5.1.1 Product inspection is classified into type inspection and end-of-manufacturing inspection.
5.1.2 Type inspection items include all the items specified in Table 1. Type inspection shall be carried out under any of the following cases:
a) every 3 months during normal production;
b) changes in key production processes or main equipment;
c) changes in the main raw materials affecting product quality;
d) where production is reinstated after being halted;
e) where the result of end-of-manufacturing inspection differs greatly from that of the last type inspection.
5.1.3 Appearance, color (platinum-cobalt), o-xylene content, p-xylene content+m-xylene content, cumene content, non-aromatic content + content of C9 aromatic or above, styrene content, acid-washing colorimetry and bromine index in Table 1 of this standard are end-of-manufacturing inspection items.
5.2 Batching
Take products of one same quality as one batch. Batching may be carried out based on product storage tank.
Foreword i
1 Scope
2 Normative references
3 Requirements
4 Sampling
5 Inspection rules
6 Marking, labeling and accompanying documents
7 Packaging, transportation and storage
Annex A (Informative) Safety
