GB/T 7815-2008Pentaerythritol for industrial use (English PDF)

Foreword

This standard replaces GB/T 7815-1995 "industrial pentaerythritol." This standard and GB/T 7815-1995 compared to the main changes are as follows.

--- "Range" from the "This standard applies to explosives other than the addition of pentaerythritol industry" to "This standard applies to formaldehyde and acetaldehyde As raw material, sodium hydroxide or calcium hydroxide as the catalyst for the production of industrial pentaerythritol production, testing and marketing of " (See Chapter 1);

--- Increase "category and named" chapter (see Chapter 3);

--- Technical requirements increase the appearance (see 4.1);

--- Industrial pentaerythritol product classification superior products, first-class products, qualified for the modification of industrial purity by typing pentaerythritol (1995 Edition Chapter 3, edition 4.2);

--- To increase the melting point of the final project (see 4.2);

--- Technical requirements by the content of mono-pentaerythritol superior product >=93%, first-class product >=86%, qualified product does not control the modification of pentaerythritol Content 98 >=98.0%, pentaerythritol [in C (CH2OH) 4 meter] content 95 >=95.0%, 90 Ji >=90.0%, 86 >=86.0%, hydroxyl content of >=47% by the high-class product, first-class product >=47%, >=46% qualified products modified to 98 >=48.5%, 95 Ji >=47.5%, 90 Ji >=47.0%, 86 Ji >=46.0%, loss on drying by the high-class product, first-class goods <=0.5%, qualified products <=0.7% revised to 98 <=0.20%, 95 grade 90, 86 <=0.50%, Residue on ignition by a superior Products, first-class products, qualified <=0.1% revised to 98 <=0.05%, 95 grade 90 and 86 <=0.10%, phthalic Resin coloring degree (Fe, Co, Cu standard color solution number) by the superior product <=2, first-class goods <=4, qualified product <=6 revised to 98 <=1, 95, 90 <=2,86 level <=4, eventually melting point 98 >=250 °C, no other level control (1995 Edition Chapter 3, Excerpts 4.2);

Standard Test Method for Determination --- pentaerythritol increased by gas chromatography, and as 98 of the Arbitration Act (see 5.3.2);

--- A final melting point measurement method using Melting Point method (see 5.8);

--- Increased "inspection rules" section (see Chapter 6). Appendix A of this standard is an informative annex. The standard proposed by China Petroleum and Chemical Industry Association.

1 Scope

This standard specifies the use of pentaerythritol industry requirements, test methods, inspection rules and signs, packaging, transportation and storage.

This standard applies to formaldehyde and acetaldehyde as raw materials, sodium hydroxide or calcium hydroxide as the catalyst for the production of industrial pentaerythritol production, Testing and marketing.

Molecular formula. C (CH2OH) 4 Molecular weight. 136.14 (according to 2005 international relative atomic mass)

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 191-2008 Packaging - Pictorial signs (ISO 780.1997MOD)

Preparation of GB/T 601-2002 Chemical Reagent standard titration solution

GB/T 603-2002 Chemical Reagent Test Methods Preparations with (ISO 6353-1. 1982, NEQ)

GB/T 617-2006 Chemical Reagent melting range of common measurement method (ISO 6353-1. 1982, NEQ)

Representation GB/T 1250 limit values and the method of determining

GB/T 6678-2003 General Principles for Sampling Chemical Products

GB/T 6679-2003 General rules for sampling solid chemical products

GB/T 6682-1992 analytical laboratory use specifications and test methods (ISO 3696. 1987, NEQ)

GB/T 7531-1987 Determination of organic chemical products ash (ISO 6353-1. 1982, NEQ)

3 Classification and nomenclature

Press the industrial pentaerythritol purity of 98%, 95%, 90%, 86% divided into four types, designated as 98, 95, 90, 86.

4 Requirements

4.2

Industrial pentaerythritol shall comply with the technical requirements in Table 1 below.

Table 1 Technical Requirements, index by type (98, 95, 90, 86):

Pentaerythritol mass fraction /% >= 98.0 for type 98; not specified for types 95, 90 and 86.

Pentaerythritol (in C (CH2OH) 4 meter) mass fraction /% >= 95.0 for type 95, 90.0 for type 90 and 86.0 for type 86; not specified for type 98.

The mass fraction of hydroxyl groups /% >= 48.5 for type 98, 47.5 for type 95, 47.0 for type 90 and 46.0 for type 86.

Drying loss mass fraction /% <= 0.20 for type 98; 0.50 for types 95, 90 and 86.

Burning residue mass fraction /% <= 0.05 for type 98; 0.10 for types 95, 90 and 86.

Phthalate resin coloring degree / (Fe, Co, Cu standard color solution) <= No. 1 for type 98, No. 2 for types 95 and 90, No. 4 for type 86.

Final melting point /°C >= 250 for type 98; not specified for types 95, 90 and 86.

The content of a cyclic formals of pentaerythritol and pentaerythritol are translated into C (CH2OH) 4 included.