Thanks, Luke. First of all, before getting into the numbers, this quarter marks the first time reporting under our new organizational structure, which became effective January 1. Our businesses are now aligned under 2 global business units. The Performance Chemicals segment is comprised of Fire Safety Solutions, Specialty Chemicals and Fine Chemistry Services, consolidating our bromine, mineral and custom manufacturing assets under one business unit. The Catalyst Solutions segment includes Refinery Catalyst Solutions, Performance Catalyst Solutions and Antioxidants.
We released an 8-K in March detailing 4 years of restated financial results, including quarterly data for 2013 and 2012. In connection with this realignment, certain costs have been reassigned and certain divisions have moved around. One change that's clear when you compare numbers under the new structure to the old structure is that a higher proportion of people costs, mostly SG&A and R&D, are now charged to Catalyst Solutions than were previously allocated to them, while lesser charge to Performance Chemicals. This reflects the impact of changing from a functional structure where shared costs such as sales, some technical groups and the like, were allocated to each business on a ratio basis to a more fully accountable GBU structure, under which such costs are aligned and charged directly to each respective business based on the people in that GBU. As a result, Catalyst segment income and margins are somewhat lower than under the old structure and Performance Chemicals segment income and margins are somewhat higher. Fundamentally, of course, nothing has changed regarding the growth expectations or prospects for either business.
I'm going to review our 2 business segments and then turn to the details on our P&L and cash flow. Overall, our net sales rose 2% to $657 million year-over-year, driven by solid Catalyst Solutions performance. Segment income was $128 million or 20% of sales, down 5% year-over-year, as modestly higher Catalyst Solutions profits were offset by weaker Performance Chemicals results, reflecting a combination of continued sluggish electronics demand and energy costs. Catalysts reported first quarter sales of $296 million, up 6% year-over-year and segment income of $57 million, up 4% year-over-year on segment margins of 19%. Refinery Catalyst Solutions performed well, delivering double-digit volume and profit growth, offset by lower pricing and the impact of higher fixed cost within Performance Catalyst Solutions and overcoming higher energy costs. Specifically, heavy oil upgrading, which is primarily comprised of FCC catalysts, experienced double-digit volume, revenue and profit growth driven by strong demand and favorable pricing. Clean Fuels Technologies, which is mainly HPC catalysts, also reported double-digit earnings growth despite lower volumes on favorable mix. Within Performance Catalyst Solutions, as anticipated, the impact of higher fixed costs and base-loading our new Saudi joint venture plant with volumes previously produced out of our wholly-owned facilities in the U.S. was a drag on profitability on a year-on-year basis, a dynamic we expect to continue through the balance of the year. Volumes were higher year-over-year, but pricing remained weak within both polyolefin catalysts and electronic materials.
Performance Chemicals reported first quarter net sales of $361 million, in line with year-ago levels, and segment income of $71 million, down 11% year-over-year on segment margins of 20%. A combination of lower Fire Safety Solutions profitability and higher energy costs offset strong Fine Chemistry Services growth and modestly higher Specialty Chemicals results. Specifically, profits declined year-over-year within Fire Safety Solutions, which consist of our brominated and mineral flame retardants, reflecting weaker enclosures, printed wiring board and construction demand. These dynamics offset strong growth in several nonelectronics-related applications for 8010, one of our core brominated flame retardant product lines, including wiring cable, as well as plastic films into the construction, household appliances and automotive electronics end markets. The breadth of 8010's application has become increasingly evident in recent quarters.
Finally, mineral flame retardants also had a solid quarter profit-wise, benefiting from a better term to the European economy. The soft year-over-year electronics results we experienced matched the tone of several market indicators that tend to correlate with current period results including the IPC book-to-bill ratio, which has improved in recent months, but remained below 1.0 at 0.99 in February, with shipments still well below the 2010 levels. In addition, IDC and Gartner reported first quarter declines in PC shipments of between 2% and 4%.
Within Specialty Chemicals, which consist of all bromine derivatives that are not flame retardants, plus our curatives and specialty aluminas, volumes and profits rose modestly year-over-year. The primary drivers were a combination of exceptional clear completion fluid volumes, where strength was evident in the Middle East and the North Sea, and outstanding curatives growth, which benefited from milder winter weather in Europe and the commencement of a number of infrastructure projects globally, including Europe, North America and China.
Fine Chemistry Services, which consists of our custom synthesis business, reported excellent volume and profit growth year-over-year, driven by a combination of more normal order patterns within the ag intermediates relative to the year-ago period and good momentum in electronic materials, with select consumer electronics experiencing broadening acceptance in the marketplace.
Overall, from the first quarter, we reported all-in diluted earnings per share of $0.71 or $0.96 per share excluding special items, the largest special item related to a pretax charge of $70 million, which amounted to a $0.14 loss per share after taxes, associated with consolidating a high-cost aluminum alkyls capacity. We expect to start seeing benefits of this consolidation in 2016.
The second special item of $0.11 per share in nonoperating pension and OPEB items reflects the net of a mark-to-market pension actuarial loss of $15 million pretax, or $0.12 per share after-tax, and a curtailment gain of approximately 800 -- $8.8 million or $0.01 per share after-tax. Ordinarily, we would not be required to record pension gains or losses more than once a year during the fourth quarter. However, the workforce reduction plan we commenced during the first quarter reduced our global workforce by approximately 230 employees. This triggered the curtailment gain for one of our U.S.-defined benefit plans, which required us to remeasure our assets and obligations for these plans. Negative asset performance and a decline in the discount rate for our domestic pension plans year-to-date resulted in the mark-to-market actuarial loss for the first quarter of 2014.
SG&A expenses were $67.6 million during the quarter, up 4% year-over-year, driven by higher incentive compensation costs and commissions. Our quarterly SG&A expenses are expected to remain in the mid-$70 million range, with the increase from 2013 driven largely by recurring for on-target incentive-based compensation in 2014 versus an extremely low payout in 2013. R&D expense entered the quarter at $23 million, up 13%, consistent with our realignment goals to redeploy resources to growth areas.
Free cash flow, defined as cash flow from operations, adding back pension contributions and subtracting capital expenditures, was strong at $128 million for the first quarter, up 178% year-over-year, driven by working capital reductions and lower CapEx. As we stated last quarter, we have stepped up our focus on working capital and established a goal to permanently reduce working capital by at least $100 million by 2015. Our initiatives are underway and showing early progress as we seek to achieve a meaningful portion of that $100 million goal in 2014. Specifically, net working capital improved by $40 million versus year-end levels and sequentially fell 165 basis points as a percentage of sales to 22% mainly driven by lower receivables and inventory.
CapEx was $24 million, down over 50% year-over-year, a trend we expect to continue throughout 2014 that reflects the fact that our major capacity expansions are now complete. Our current view is that CapEx will likely decline to between $100 million and $125 million this year, about 20% lower than the range we expressed back in January, reflecting changes in the timing of certain projects and investments.
From a total shareholder return perspective, we returned approximately $70 million to shareholders this quarter, of which $20 million reflected dividends and $50 million related to executing the accelerated share repurchase program that will be completed at the end of April.
Overall, our balance sheet remains a source of strength and flexibility with strong liquidity at $524 million in cash reserves, net debt of $537 million, excluding non-guaranteed JV debt, and net debt to EBITDA at 0.9x, roughly in line with our targeted capital structure of 1x.
Over -- our effective tax rate, excluding special items in nonoperating pension and OPEB items for the quarter, was 23.7%, down 90 basis points year-over-year, driven by geographic mix and benefits from a favorable mix of income and lower tax jurisdictions. At this time, with the same inclusions, we expect our full-year rate to remain at that 23.7%.
From a raw material standpoint, as we indicated in January, we are currently forecasting an increase in energy costs of approximately $10 million to $12 million for the full year, primarily driven by the impact of higher natural gas prices. The first quarter profit headwind from higher natural gas prices was approximately $4 million.
And with that, I'll turn the call back over to Luke to discuss our outlook.